iom_1202_082013

Installation & Operating Manual IOM 1202

Pathfinder® Air Cooled ChillersGroup: Chillers

Part Number: IOM1202

Date: July, 2013

© 2013 Daikin Applied

Models AWS170-C to AWS550-C, Standard, High, & Premium Efficiencies Includes models with VFD

170 to 550 tons • 600 to 1930 kW • R-134a • 60Hz

Software Version 263214200

2 IOM 1202

Table of ContentsTable of Contents

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Installation and Startup . . . . . . . . . . . . . . . . . . . . . . 4Lifting & Mounting Weights. . . . . . . . . . . . . . . . . . 15Lifting & Mounting Weights. . . . . . . . . . . . . . . . . . 17Index of Lifting & Mounting Drawings . . . . . . . . . 19Lifting & Mounting Dimensions (non-VFD) . . . . . 20Lifting & Mounting Dimensions (VFD) . . . . . . . . . 26Isolator Locations and Kit Numbers. . . . . . . . . . . 31Electrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . 42Multipoint Electrical Data (non-VFD) . . . . . . . . . . 44Multipoint Field Wiring Data (non-VFD) . . . . . . . . 47Terminal Amps (non-VFD) (single/multi-point) . . 52Single-point Electrical Data (non-VFD). . . . . . . . . 56Single-point Field Wiring Data (non-VFD) . . . . . . 59Multipoint Electrical Data (VFD) . . . . . . . . . . . . . . 63Multipoint Field Wiring Data (VFD) . . . . . . . . . . . . 64

Terminal Amps (VFD) (single- and multi-point) . 65Single-point Electrical Data (VFD) . . . . . . . . . . . . 66Single-point Field Wiring Data (VFD). . . . . . . . . . 67Pressure Drop Data. . . . . . . . . . . . . . . . . . . . . . . . 68Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75General Description . . . . . . . . . . . . . . . . . . . . . . . 76Controller Description . . . . . . . . . . . . . . . . . . . . . 80Sequence of Operation . . . . . . . . . . . . . . . . . . . . . 82Controller Operation . . . . . . . . . . . . . . . . . . . . . . . 86Unit Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94Circuit Functions. . . . . . . . . . . . . . . . . . . . . . . . . 103Alarms and Events . . . . . . . . . . . . . . . . . . . . . . . 110Using the Controller . . . . . . . . . . . . . . . . . . . . . . 117Optional Remote User Interface. . . . . . . . . . . . . 121Optional Compressor VFD . . . . . . . . . . . . . . . . . 123Optional Power Factor Correction Capacitors . 127Start-up and Shutdown. . . . . . . . . . . . . . . . . . . . 128System Maintenance. . . . . . . . . . . . . . . . . . . . . . 130

Appendix 134

Hazard Identification

DANGER

Dangers indicate a hazardous situation which will result in death or serious injury if not avoided.

WARNING

Warnings indicate potentially hazardous situations, which can result in property damage, severe personal injury, or death if not avoided.

CAUTION

Cautions indicate potentially hazardous situations, which can result in personal injury or equipment damage if not avoided.

Modbus

Document: IOM 1202Issue Date: July 31, 2013Revision Date: NewReplaces: New

© 2013 Daikin Applied. Illustrations and data cover the Daikin Applied product at the time of publication and we reserve the right to make changes in design and construction at anytime without notice. ™® The following are trademarks or registered trademarks of their respective companies: BACnet from ASHRAE; LONMARK, LonTalk, LONWORKS, and the LONMARK logo are managed, granted and used by LONMARK International under a license granted by Echelon Corporation; ElectroFin from AST ElectroFin Inc.; Modbus from Schneider Electric; FanTrol, MicroTech III, Open Choices, and SpeedTrol from Daikin Applied.

Introduction
Introduction
Figure 1: Model Nomenclature

S = Standard EfficiencyH = High Efficiency

A W S XXX C D SE

Air-Cooled

World ProductScrew CompressorNominal Tons

D = Dual CompressorDesign Vintage T = Triple Compressor

P = Premium Efficiency

E = Standard PackagedM = Remote Evaporator

General Description

Daikin Pathfinder™ air-cooled chillers are complete, self-contained chillers that include the latest in engineered components arranged to provide a compact and efficient unit. Each unit is completely assembled, factory wired, evacuated, charged, tested and comes complete and ready for installation. Each of two circuits consists of an air-cooled condenser section with an integral subcooler section, a semi-hermetic, single-screw compressor with starter, a multi-circuit, shell-and-tube, direct expansion evaporator, an economizer and complete refrigerant piping. Each compressor has an independent refrigeration circuit. Liquid line components included are a manual liquid line shutoff valve, charging port, filter-drier, sight-glass/moisture indicator, and electronic expansion valve. A combination discharge check and shutoff valve is included and a compressor suction shutoff valve is optional. Other features include compressor heaters, evaporator heaters for freeze protection, automatic, one-time pumpdown of each refrigerant circuit upon circuit shutdown, and an advanced fully integrated microprocessor control system.

Pathfinder units are available as standard efficiency (CDS) or high efficiency (CDH) or premium efficiency (CDP). A high ambient option is required for operation in ambient temperatures above 100°F (37.8°C) and up to 125°F (51.7°C) and when the VFD low ambient option is selected.

Information on the operation of the unit MicroTech®III controller can be found starting on page 86.

Remote Evaporator Models

For enhanced application flexibility, AWS non-VFDand VFD models are also available as remote evaporator models. Information on remote evaporator units can be found in the IM 1203 manual, available on www.DaikinApplied.com.

Inspection

When the equipment is received, carefully check all items against the bill of lading to verify for a complete shipment. Check all units for damage upon arrival. All shipping damage must be reported to the carrier and a claim must be filed with the carrier. Check the unit’s serial plate before unloading the unit to be sure that it agrees with the power supply available. Physical damage to a unit after shipment is not Daikin Applied’s responsibility.

Note: Unit shipping and operating weights are shown in the Lifting and Mounting section beginning on page 15.

Table 1: Operating LimitsMaximum standby ambient temperature 130°F (54.4°C)

Maximum operating ambient temperature 100°F (37.8°C)

with optional high ambient package (see detailed information in Cat 623) 125°F (52°C)

Minimum operating ambient temperature (standard control) 35°F (2°C)

Minimum operating ambient temperature (with optional low-ambient control) 0°F (-18°C)

Leaving chilled water temperature [NOTE: 60°F (15.6°C) with VFD and Reduced Amp Limit] 40°F to 70°F (4.4°C to 21.1°C)

Leaving chilled fluid temperatures (with anti-freeze) - Unloading is not permitted with fluid leaving temperatures below 30°F (-1°C). [NOTE: 60°F (15.6°C) with VFD and Reduced Amp Limit]

20°F to 70°F (-6.7°C to 21.1°C)

IOM 1202 3

Installation and Startup
Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations, and experienced with this type of equipment.

WARNING

Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.

Start-up by the Service Group of Daikin Applied is included on all Pathfinder units sold for installation within the U.S. and Canada and must be performed by them to initiate the standard Limited Product Warranty. Start-up by any party other than the Service Group of Daikin Applied or a Daikin Applied Authorized Service Representative will void the Limited Product Warranty. Two-week prior notification of start-up is required. The contractor should obtain a copy of the Start-up Scheduled Request Form from the sales representative or from the nearest Daikin Applied Service office.

WARNING

Escaping refrigerant can displace air and cause suffocation. Immediately evacuate and ventilate the equipment area. If the unit is damaged, follow Environmental Protection Agency (EPA) requirements. Do not expose sparks, arcing equipment, open flame or other ignition source to the refrigerant.

Handling

DANGER

Improper lifting or moving of a unit can result in property damage, severe personal injury or death. Follow rigging and moving instructions carefully.

Avoid rough handling shock due to impact or dropping the unit. Do not push or pull the unit. Never allow any part of the unit to fall during unloading or moving, as this can result in serious damage.

To lift the unit, lifting tabs with 3" (76 mm) diameter holes are provided on the base of the unit. All lifting holes must be used when lifting the unit. Spreader bars and cables should be arranged to prevent damage to the condenser coils or unit cabinet (see Figure 2).

LocationLocate the unit outdoors and carefully to provide proper airflow to the condenser. (See Figure 3, page 5 for required clearances.)Using less clearance than shown in Figure 3can cause discharge air recirculation to the condenser and could have a significant detrimental effect on unit performance.

Due to the shape of the condenser coils on the Pathfinder chillers, it is recommended that the unit be oriented so that prevailing winds blow parallel to the unit length, thus minimizing the wind effect on condensing pressure and performance. If low ambient temperature operation is expected, optional louvers should be installed if the unit has no protection against prevailing winds.

For pad-mounted units, it is recommended that the unit be raised a few inches with suitable supports such as neoprene waffle vibration pads, located at least under the mounting locations. This will allow water to drain from under the unit and facilitate cleaning under it.

Figure 2: Required Lifting Method

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NOTES:

1. Unit with 8 lifting points illustrated above; the number ofcondenser sections, fans, and lifting points can vary fromthis diagram.see lifting/mounting drawings beginning onpage page 20 to identfy the number of lifting points for aspecific unit.

2. All rigging points must be used. See weights at liftingpoints beginning on page 15 for each specific size unit.

3. Crosswise and lengthwise spreader bars must be used toavoid damage to unit.

Mounting Hole Access

The inside of the base rail is open to allow access for securing mounting bolts, etc.

Service Access

Compressors, filter-driers, and manual liquid line shutoff valves are accessible on each side or end of the unit. The evaporator heater is located on the barrel.

The control panels are located on the end of the chiller. The left-hand control box contains the unit and circuit microprocessors as well as transformers, fuses and terminal.

4 IOM 1202


The right-hand panel contains a circuit breaker. A minimum of four feet of clearance is required in front of the panels. The side clearance required for airflow provides sufficient service clearance.

On all Pathfinder units, the condenser fans and motors can be removed from the top of the unit. The complete fan/motor assembly can be removed for service. The fan blade must be removed for access to wiring terminals at the top of the motor.

DANGER

Disconnect, lockout and tag all power to the unit before servicing condenser fan motors or compressors. Failure to do so can cause bodily injury or death.

Do not block access to the sides or ends of the unit with piping or conduit. These areas must be open for service access. Do not block access to the control panels with field-mounted disconnect switches.

Clearance RequirementsNotes:

1 Minimum side clearance between two units is 12 feet (3.7 meters).

2 Unit must not be installed in a pit or enclosure that is deeper or taller than the height of the unit unless extra clearance is provided per note 4.

3 Minimum clearance on each side is 8 feet (2.4 meters) when installed in a pit no deeper than the unit height.

4 Minimum side clearance to a side wall or building taller than the unit height is 6 feet (1.8 meters), provided no solid wall above 6 feet (1.8 meters) is closer than 12 feet (3.7 meters) to the opposite side of the unit.

5 Do not mount electrical conduits where they can block service access to compressor controls, refrigerant driers or valves.

6 There must be no obstruction of the fan discharge.

7 Field installed switches must not interfere with service access or airflow.

Figure 3: Clearance Requirements

5ft (1.5m) if open fence or 50% open wallif solid wall (see note 3 for pit)

5ft (1.5m) if open fence or 50% open wallif solid wall (see note 3 for pit)

No obstructions.Recommended arearequired for unitoperation, air flow and maintenanceaccess.

3ft (1m) for service

See Note 5

Wall or Fence

Air FlowNo obstructions allowedabove unit at any height

See notes 2 & 4concerning wallheight at unit sides.

6ft (1.8m)

6ft (1.8m)

4ft (1.2m)For electricpanel access

Restricted Air Flow

The clearances required for design operation of Pathfinder air-cooled chillers are described in the previous section. Occasionally, these clearances cannot be maintained due to site restrictions such as units being too close together or a fence or wall restricting airflow, or both. Pathfinder chillers have several features that may help mitigate the penalties attributable to restricted airflow.

"The condenser section is "W" shaped, as shown below. This allows inlet air for these coils to come in from both sides and the bottom. All the coils in one "V" section serve one compressor. Each compressor has its own independent refrigerant circuit.

"The MicroTech III control is proactive in response to "off-design conditions". In the case of single or compounded influences restricting airflow to the unit, the microprocessor will act to keep the unit running (at reduced capacity), rather than allowing a shut-off on high discharge pressure.

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IOM 1202 5


Case 1: Building or Wall on One Side of One Unit

The existence of a screening wall or the wall of a building in close proximity to an air-cooled chiller is common in both rooftop and ground level applications. Hot air recirculation on the coils adjoining the wall will increase compressor discharge pressure, decreasing capacity and increasing power consumption.

When close to a wall, it is desirable to place chillers on the north or east side of them. It is also desirable to have prevailing winds blowing parallel to the unit's long axis. The worst case is to have wind blowing hot discharge air into the wall.

Figure 4: Unit Adjacent to Wall - Adjustment Factors

Full Load Capacity Adjustment FactorD=4 ft (1.2m)

D=5 ft (1.5m)

D=6 ft (1.8m)

0.00

0.25

0.50

0.75

1.00

8(2.4)

16(4.8)

24(7.2)

H - Height of Wall or Building in ft. (m)

Ca

pa

cit

y R

ed

uc

tio

n (

%)

Full Load Power Adjustment Factor

D=4 ft (1.2m)

D=5 ft (1.5m)

D=6 ft (1.8m)

0.00

0.50

1.00

1.50

2.00

8(2.4)

16(4.8)

24(7.2)

H - Height of Wall or Building in ft. (m)

Po

wer

Incr

ease

(%

)

HD

Case 2: Two Units Side By Side

Two or more units sited side by side are common. If spaced closer than 12 feet (3.7 meters) it is necessary to adjust the performance of each unit; circuits adjoining each other are affected. If one of the two units also has a wall adjoining it, see Case 1. Add the two adjustment factors together and apply to the unit located between the wall and the other unit.

Mounting units end to end will not necessitate adjusting performance.

Do not use pit or solid wall surrounds where the ambient air temperature exceeds 105°F (40°C).

Figure 5: Two Units Side by Side - Adjustment Factors

Full Load Capacity Adjustment Factor

0.00

0.50

1.00

1.50

6(1.8)

8(2.4)

10(3.0)

12(3.6)

Distance Between Units in ft. (m)

Ca

pa

cit

y R

ed

uc

tio

n (

%)


0.00

0.50

1.00

1.50

2.00

2.50

3.00

6(1.8)

8(2.4)

10(3.0)

12(3.6)


Po

wer

Incr

ease

(%

)

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Case 3: Three or More Units Side By Side

When three or more units are side by side, the outside chillers (1 and 3 in this case) are influenced by the middle unit only on their inside circuits. Their adjustment factors will be the same as Case 2. All inside units (only number 2 in this case) are influenced on both sides and must be adjusted by the factors shown below.

Figure 6: Three or More Units - Adjustment Factor.

Full Load Capacity Adjustment Factor

0.00

1.00

2.00

3.00

8(2.4)

12(3.6)

16(4.8)

20(6.1)


Ca

pa

cit

y R

ed

uc

tio

n (

%)


0.00

2.00

4.00

6.00

8(2.4)

12(3.6)

16(4.8)

20(6.1)


Po

wer

Incr

ease

(%

)

Case 4: Open Screening Walls

Decorative screening walls are often used to help conceal a unit either on grade or on a rooftop. Design these walls such that the combination of their open area and distance from the unit do not require performance adjustment. It is assumed that the wall height is equal to or less than the unit height when mounted on its base support. This is usually satisfactory for concealment. If the wall height is greater than the unit height, see Case 5, Pit Installation.

The distance from the sides of the unit to the side walls must be sufficient for service, such as opening control panel doors.

If each side wall is a different distance from the unit, the distances can be averaged providing either wall is not less than 8 feet (2.4 meters) from the unit. For example, do not average 4 feet and 20 feet to equal 12 feet (1 meter and 5 meters to equal 3 meters).Figure 7: Open Screening Walls - Adjustment Factors

Wall Free Area vs Distance

0.00

2 .00

4 .00

6 .00

8 .00

0 1 0 2 0 3 0 4 0 5 0

% Ope n Wall Ar e a

D -

Dis

tan

ce f

rom

Wal

l to

Un

it in

Ft.

(m

)

IOM 1202 7


Case 5, Pit/Solid Wall Installation

Use care with pit installations as they can cause operating problems. Recirculation and restriction can both occur. Use this information for a solid wall around unit A.

If steel grating is used used to cover a pit, the grating material and installation design must be strong enough to prevent accidents, yet provide abundant open area to prevent air recirculation. Have any pit installation reviewed by the Daikin Applied sales representative prior to installation to make sure there is sufficient air-flow clearance. .

Figure 8: Pit Installation - Adjustment Factors

Full Load P owe r Adjustme nt Fac tor

D =6 ft (1 .8 m )

D=8 ft (2 .4 m )

D= 1 0 ft (3 .1 m )

0 .0 0

2 .0 0

4 .0 0

6 .0 0

8 .0 0

8(2 .4 )

1 0(3 .1 )

1 2(3 .7 )

1 4(4 .3 )

H - He ig ht of W a ll or Building in ft. (m )

Po

we

r In

crea

se

(%)

Chilled Water Piping

IMPORTANT: Piping design must be provided by a qualified Architect or Systems HVAC Design Engineer familiar with piping design, as well as local codes and regulations. The manufacturer recommendations provided here are to be used as a general guide, but do not replace system design by a qualified professional.

Design the piping with a minimum number of bends and changes in elevation to keep system cost down and performance up. It should contain:

1 Vibration eliminators to reduce vibration and noise transmission to the building.

2 Shutoff valves to isolate the unit from the piping system during unit servicing.

3 Manual or automatic air-vent valves at the high points of the system and drains at the low parts in the system. The evaporator should not be the highest point in the piping system.

4 Some means of maintaining adequate system water pressure (i.e., expansion tank or regulating valve).

5 Water temperature and pressure indicators located at the evaporator inlet and outlet to aid in unit servicing. Any connections should be made prior to filling the system with water.

6 A strainer to remove foreign matter from the water before it enters the pump. Place the strainer far enough upstream to prevent cavitation at the pump inlet (consult pump manufacturer for recommendations). The use of a strainer will prolong pump life and help maintain high system performance levels. Note: A cleanable, perforated metal basket strainer with 0.125-inch perforation, 40% open area. must also be placed in the supply water line just prior to the inlet of the evaporator. See “Optional Inlet Strainer” on following page. This will aid in preventing foreign material from entering the evaporator and causing damage or decreasing its performance. Care must also be exercised if welding pipe or flanges to the evaporator connections to prevent any weld slag from entering the evaporator.

7 Any water piping to the unit must be protected to prevent freeze-up if below freezing temperatures are expected.

8 If the unit is used as a replacement chiller on a previously existing piping system, flush the system thoroughly prior to unit installation. Perform regular chilled water analysis and chemical water treatment immediately at equipment start-up.

9 In the event glycol is added to the water system as a late addition for freeze protection, recognize that the refrigerant suction pressure will be lower, cooling performance less, and water side pressure drop greater. If the percentage of glycol is large, or if propylene is employed in lieu of ethylene glycol, the added pressure drop and loss of performance could be substantial.

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10 Do not use PVC or CPVC piping due to incompatibility with POE oil in the event of a refrigerant to water leak.

11 For ice making or low temperature glycol operation, a different freezestat pressure value is usually required. The freezestat setting can be manually changed through the MicroTech III controller.

Make a preliminary leak check prior to insulating the water piping and filling the system.

Include a vapor barrier with the piping insulation to prevent moisture condensation and possible damage to the building structure. It is important to have the vapor barrier on the outside of the insulation to prevent condensation within the insulation on the cold surface of the pipe.

Chilled Water Pump

It is important that the chilled water pumps be wired to, and controlled by, the chiller's microprocessor. The chiller controller has the capability to selectively start pump A or B or automatically alternate pump selection and also has standby operation capability. The controller will energize the pump whenever at least one circuit on the chiller is enabled to run, whether there is a call for cooling or not. This helps ensure proper unit start-up sequence. The pump will also be turned on when the water temperature reaches 1°F below the Freeze Setpoint to help prevent evaporator freeze-up. Wiring connection points are shown in Figure 38, page 42.

CAUTION

Adding glycol or draining the system is the recommended method of freeze protection. If the chiller does not have the ability to control the pumps and the water system is not drained in temperatures below freezing, catastrophic evaporator failure may occur.

Failure to allow pump control by the chiller controller may cause the following problems:

1 If any device other than the chiller attempts to start the chiller without first starting the pump, the chiller will lock out on the No Flow alarm and require manual reset.

2 If the chiller evaporator water temperature drops below the “Freeze setpoint” the chiller will attempt to start the water pumps to avoid evaporator freeze. If the chiller does not have the ability to start the pumps, the chiller will alarm due to lack of water flow.

3 If the chiller does not have the ability to control the pumps and the water system is not to be drained in temperatures below freezing, the chiller may be subject to catastrophic evaporator failure due to freezing. The freeze rating of the evaporator is based on the immersion heater and pump operation. The immersion heater itself may not be able to properly protect the evaporator from freezing without circulation of water.

Optional Inlet Strainer

An inlet water strainer kit is available as a shipped-loose option, sized per Table 2 and with the pressure drop shown in Figure 9. The kit is field installed and consists of:

• Y-type 40% open area strainer with 304 stainless steelperforated basket, Victaulic pipe connections andstrainer cap

• Extension pipe with two Schrader fittings that can beused for a pressure gauge and thermal dispersion flowswitch. The pipe provides sufficient clearance from theevaporator for strainer basket removal.

• ½-inch blowdown valve

• Two Victaulic clampsTable 2: Strainer Sizing Data

Figure 9: Strainer Pressure Drop

Installing Optional Inlet Strainer

The extension pipe is located adjacent to the evaporator with the strainer then mounted to it. The strainer must be mounted per manufacturer's instruction with the arrows in the direction of flow; inlet and outlet are noted along with the arrows.

Use one Victaulic clamp to mount the extension pipe to the evaporator and the second to mount the strainer to the pipe. The clamps to mount the field piping to the strainer are field supplied. The piping and strainer must be supported to prevent any stress on the evaporator nozzle.

The extension pipe has two Schrader fittings that can be used as desired, frequently for mounting the optional Daikin

AWS ModelStrainer Size (in.)

Strainer Plus Pipe Length

(in.)

Strainer Weight

(lbs)

175CDS-250CDS210CDH-250CDH

6 30.5 72


8 36.0 125


10 43.0 205

IOM 1202 9


Daikin thermal dispersion flow switch and a water pressure gauge. The ball valve can be installed in the strainer basket cover as a blow-down valve.

System Water Volume

All chilled water systems need adequate time to recognize a load change, respond to that load change and stabilize, without undesirable short cycling of the compressors or loss of control. In air conditioning systems, the potential for short cycling usually exists when the building load falls below the minimum chiller plant capacity or on close-coupled systems with very small water volumes.

Some of the things the designer should consider when looking at water volume are the minimum cooling load, the minimum chiller plant capacity during the low load period and the desired cycle time for the compressors.

Assuming that there are no sudden load changes and that the chiller plant has reasonable turndown, a rule of thumb of "gallons of water volume equal to two to three times the chilled water gpm flow rate" is often used.

A properly designed storage tank should be added if the system components do not provide sufficient water volume.

Variable Speed Pumping

Variable water flow involves reducing the water flow through the evaporator as the load decreases. Daikin chillers are designed for this duty, provided that the rate of change in water flow is slow, and the minimum and maximum flow rates for the evaporator are not exceeded.

The recommended maximum change in water flow is 10 percent of the change per minute. For example, if the maximum (design) flow is 200 gpm and the flow is reduced to a minimum of 140 gpm, the change in flow is 60 gpm, so the maximum change per minute would be 10% of 60, or 6 gpm per minute. It would take ten minutes to change the flow through the entire range.

The water flow through the evaporator must remain between the minimum and maximum values listed, beginning on page 68. Note that units with variable chilled water flow can tolerate lower minimum flows than constant flow systems. If flow drops below the minimum allowable, large reductions in heat transfer can occur. If the flow exceeds the maximum rate, excessive pressure drop and tube erosion can occur.

Evaporator Freeze Protection

Pathfinder chillers are equipped with thermostatically controlled evaporator heaters that help protect against freeze-up down to -20°F (-28°C). The immersion heater itself may not be able to properly protect the evaporator from freezing without circulation of water, and it is important that the chilled water pumps are wired to, and controlled by, the chiller’s controller. Additionally, use at least one of the following procedures during periods of sub-freezing temperatures:

1 Add a concentration of a glycol anti-freeze with a freeze point 10°F below the lowest expected temperature. This will result in decreased capacity and increased pressure drop. Note: Do not use automotive grade antifreezes as they contain inhibitors harmful to chilled water systems. Use only glycols specifically designated for use in building cooling systems.

2 Drain the water from outdoor equipment and piping and blow the chiller tubes dry from the chiller. Do not energize the chiller heater when water is drained from the vessel.

Note: The heaters come from the factory connected to the control power circuit. The control power can be rewired in the field to a separate 115V supply (do not wire directly to the heater). See the field wiring diagram on page 42. If this is done, it should power the entire control circuit. Mark the disconnect switch clearly to avoid accidental deactivation of the heater during freezing temperatures. Exposed chilled water piping also requires protection. If the evaporator is drained for winter freeze protection, the heaters must be de-energized to prevent heater burnout..

Table 3: Freeze Protection

Temp.°F (°C)

% Volume Glycol Concentration Required

For Freeze Protection For Burst Protection

Ethylene Glycol

Propylene Glycol

Ethylene Glycol

Propylene Glycol

20 (6.7) 16 18 11 1210 (-12.2) 25 29 17 200 (-17.8) 33 36 22 24

-10 (-23.3) 39 42 26 28-20 (-28.9) 44 46 30 30-30 (-34.4) 48 50 30 33-40 (-40.0) 52 54 30 35-50 (-45.6) 56 57 30 35-60 (-51.1) 60 60 30 35

Note: “Freeze protection” maintains the solution in a pumpable, usable liquid state. “Burst protection” prevents pipes from rupturing, but solution may be in a gel state and not pumpable. In most applications, “burst” protection is sufficient; concentrations over 30% Ethylene Glycol or 35% Propylene Glycol will result in efficiency and capacity losses with negligible protection increases

Note: These figures are examples only and cannot be appropriate to every situation. Generally, for an extended margin of protection, select a temperature at least 15°F lower than the expected lowest ambient temperature. Inhibitor levels should be adjusted for solutions less than 25% glycol.

Note: Glycol of less than 25% concentration is not recommended because of the potential for bacterial growth and loss of efficiency.

Flow Switch

A flow switch must be included in the chilled water system to prove that there is adequate water flow before the unit can start. It also serves to shut down the unit in the event that water flow is interrupted in order to guard against evaporator freeze-up.

A factory-mounted, solid state, thermal dispersion flow switch is available as an option.

A field-installed and wired version for remote evaporators is also available as a kit (Accessory part number 332688401).

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A paddle-type flow switch for field mounting and wiring is also available as a kit (Accessory part number 017503300). It is adaptable to pipe sizes from 1" (25mm) to 8" (203mm).

Certain minimum flow rates are required to close the switch and are listed in Table 4. Installation should be as shown in Figure 10.

Flow direction marked on switch

1" (25mm) NPT flow switch connection

Tee

1 1/4" (32mm) pipe dia. min. before switch 1 1/4" (32mm) pipe

dia. min. after switch

Flow direction marked on switch

1" (25mm) NPT f low switch connection

1 1/4" (32mm) pipe dia. min. before switch 1 1/4" (32mm) pipe

dia. min. after switch

Tee

Electrical connections in the unit control center should be made at terminals 60 and 67 from switch terminals Y and R. The normally open contacts of the flow switch should be wired between these two terminals. Flow switch contact quality must be suitable for 24 VAC, low current (16ma). Flow switch wire must be in separate conduit from any high voltage conductors (115 VAC and higher) and have an insulation rating of 600 volts.

Table 4: Paddle Type Flow Switch Flow Rates

Pipe Size inch 1 1/4 1 1/2 2 2 1/2 3 4 5 6 8

mm 32 38 51 63 76 102 127 153 204(NOTE) - (2) (2) (3) (4) (4) (4) (5)

Min.Adjst.

Flowgpm 5.8 7.5 13.7 18.0 27.5 65.0 125.0 190.0 205.0

Lpm 1.3 1.7 3.1 4.1 6.2 14.8 28.4 43.2 46.6

No Flowgpm 3.7 5.0 9.5 12.5 19.0 50.0 101.0 158.0 170.0

Lpm 0.8 1.1 2.2 2.8 4.3 11.4 22.9 35.9 38.6

Max.Adjst.

Flowgpm 13.3 19.2 29.0 34.5 53.0 128.0 245.0 375.0 415.0

Lpm 3.0 4.4 6.6 7.8 12.0 29.1 55.6 85.2 94.3

No Flowgpm 12.5 18.0 27.0 32.0 50.0 122.0 235.0 360.0 400.0

Lpm 2.8 4.1 6.1 7.3 11.4 27.7 53.4 81.8 90.8

Note: 1A segmented 3-inch paddle (1, 2, and 3 inches) is furnished mounted, plus a 6-inch paddle loose.

Note: 2Flow rates for a 2-inch paddle trimmed to fit the pipe.

Note: 3Flow rates for a 3-inch paddle trimmed to fit the pipe.

Note: 4Flow rates for a 3-inch paddle.

Note: 5Flow rates for a 6-inch paddle.

Figure 10: Typical Field Water Piping Note: Connections for vent and drain fittings are located on the top and bottom of the evaporator.

Note: Piping must be supported to avoid putting strain on the evaporator nozzles.

Refrigerant Charge

All packaged units are designed for use with R-134a and are shipped with a full operating charge. The operating charge for each unit is shown in the Physical Data Tables in Catalog 623, available at www.DaikinApplied.com.

Vent

Drain

GateValve

WaterStrainer

VibrationEliminatorValved

PressureGauge

In

OutProtect All Field Piping

Against Freezing

Flow

VibrationEliminator

FlowSwitch

BalancingValve

GateValve

Flow

Liquid

Suction

IOM 1202 11


Glycol SolutionsWhen using glycol anti-freeze solutions, the chiller's capacity, glycol solution flow rate, and pressure drop through the evaporator can be calculated using the following: Note: The procedure below does not specify the type of glycol. Use the derate factors found in Table 5 or Table 6 forcorrections when using glycol.

1 Capacity - Cooling capacity is reduced from that with plain water. To find the reduced value, multiply the chiller’s water system tonnage by the capacity correction factor to find the chiller’s capacity when using glycol.

2 Flow - To determine flow (or Delta-T) knowing Delta-T (or flow) and capacity:

3 Pressure drop - To determine pressure drop through the evaporator when using glycol, enter the water pressure drop curve at the water flow rate. Multiply the water pressure drop found there by the "PD" factor to obtain corrected glycol pressure drop.

4 Power - To determine glycol system kW, multiply the water system kW by the factor designated "Power".

Test coolant with a clean, accurate glycol solution hydrometer (similar to that found in service stations) to determine the freezing point. Obtain percent glycol from the freezing point table below. On glycol applications, the supplier normally recommends that a minimum of 25% solution by weight be used for protection against corrosion or that additional inhibitors should be employed.

CAUTION

Do not use automotive grade antifreeze. Industrial grade glycols must be used. Automotive antifreeze contains inhibitors that will cause plating on the copper tubes within the chiller evaporator. The type and handling of glycol used must be consistent with local codes.

Performance Adjustment Factors

AWS chiller units are designed to operate with leaving anti-freeze solution temperatures of 20.0°F to 65.0°F (-6.7°C to 21.1°C). Consult the local Daikin Applied sales office for performance outside these temperatures. Leaving chilled fluid temperatures below 40°F (4.4°C) result in evaporating temperatures at or below the freezing point of water and a glycol solution is required. MicroTech III control inhibits compressor unloading at leaving fluid temperatures below 30°F (-1°C).

Table 5: Ethylene Glycol Correction Factors

% E.GFreeze Point

Capacity Power Flow PDoF oC

10 26 -3.3 0.996 0.998 1.036 1.097

20 18 -7.8 0.988 0.994 1.061 1.219

30 7 -13.9 0.979 0.991 1.092 1.352

40 -7 -21.7 0.969 0.986 1.132 1.532

50 -28 -33.3 0.958 0.981 1.182 1.748

Table 6: Propylene Glycol Correction Factors

% P.G

Freeze Point

Capacity Power Flow PDoF oC

10 26 -3.3 0.991 0.996 1.016 1.092

20 19 -7.2 0.981 0.991 1.032 1.195

30 9 -12.8 0.966 0.985 1.056 1.345

40 -5 -20.6 0.947 0.977 1.092 1.544

50 -27 -32.8 0.932 0.969 1.14 1.906

Table 7: Ambient Freeze Protection

Temperature°F (°C)

Percent Volume Glycol Concentration RequiredFor Freeze Protection For Burst ProtectionEthylene Glycol

Propylene Glycol

Ethylene Glycol

Propylene Glycol

20 (6.7) 16 18 11 1210 (-12.2) 25 29 17 200 (-17.8) 33 36 22 24

-10 (-23.3) 39 42 26 28-20 (-28.9) 44 46 30 30-30 (-34.4) 48 50 30 33-40 (-40.0) 52 54 30 35-50 (-45.6) 56 57 30 35-60 (-51.1) 60 60 30 35

Note: “Freeze protection” maintains the solution ina pumpable, usable liquid state. “Burst protection” prevents pipes from rupturing, but the solution may be in a gel state and not pumpable. In most applications, “burst” protection is sufficient; concentrations over 30% Ethylene Glycol or 35% Propylene Glycol will result in efficiency and capacity losses with negligible protection increases.

Note: These figures are examples only and may not be appropriate to every situation. Generally, for an extended margin of protection, select a temperature at least 15°F (-12°C) lower than the expected lowest ambient temperature. Adjust inhibitor levels for solutions less than 25% glycol

Note: Glycol of less than 25% concentration is not recommended because of the potential for bacterial growth and subsequent loss of heat transfer efficiency. Additional inhibitors may be required.

Low fluid temperatures or high equipment room humidity may require optional double evaporator insulation. The system designer should determine its necessity. The use of glycol will reduce the performance of the unit depending on its concentra-tion. Take this into consideration during initial system design. On glycol applications, the supplier typically recommends that a minimum of 25% solution by weight be used for protection against corrosion, or additional inhibitors will be required.

( ) ( ) ( )TDelta

factorflowtonsGPM

−= 24

12 IOM 1202


Electrical Connections

All wiring must be done in accordance with applicable local and national codes. Pathfinder units can be ordered with either standard multi-point power or optional single point power connections and with various disconnect and circuit breaker options. Wiring within the unit is sized in accordance with the U.S.A. National Electrical Code. Field-supplied disconnect switches are required if not factory-supplied with the unit.Table 8: Electric Power Connection Option

Multi-PointPower Connection

Single-Point Power Connection

Standard:Disconnect switch per circuit, no

compressor isolation circuit breakers

Optional: one power block, compressor

isolation circuit breakers

Optional: High short circuit current rated panel

with disconnect switch and no isolation circuit breakers

Optional:One disconnect switch replacing

the power block, compressor isolation circuit breakers

Optional:High short circuit current rated

panel with disconnect switch and compressor isolation circuit

breakers

Note: Disconnect switches are molded case construction with lockable through-the-door handles. They can be used to remove the unit/circuit from the power system.

Note: The individual compressor isolation circuit breakers for each circuit isolate the compressor and do not have through-the-door handles. They are operable only after the panel doors are opened.

Note: The high short circuit rated panel means that a short circuit current up to the ratings shown in Table 9will be contained in the panel. There is a short period of time when the circuit breaker will short circuit before opening a circuit that can damage downstream components. In other words, the enclosure is stronger than a standard enclosure. It has a high interrupt rated disconnect switch.

Note: The factory-mounted control power transformer is protected by fuses. Condenser fans are protected and isolated by circuit breakers.

Table 9: Interrupt Ratings (kAmps)

Disconnecting means are addressed by Article 440 of the U.S.A. National Electrical Code (NEC), which requires “disconnecting means capable of disconnecting air conditioning and refrigerating equipment including motor-compressors, and controllers from the circuit feeder.” Select and locate the disconnect switch per the NEC guidelines. Maximum recommended fuse sizes are given in the electrical data tables of this catalog for help in sizing the disconnect.

Terminals are provided in a unit control panel for optional field hookup of the control circuit to a separate fused 115-volt power supply in lieu of the standard factory installed control transformer.

RapidRestore™ Option

This option does not require field installation. Exception: Field supplied inputs are required in the case of a backup unit being started after the power interruption rather than restarting the primary unit. A field supplied control (normally a BAS) must turn off the Backup Chiller connection on the primary chiller and turn on the connection on the backup chiller at the time of switching. See the unit Field Wiring Diagram on page 42 for the Backup Unit connection point (terminals #61 and #62).

VOLTAGE

STANDARD SHORT CIRCUIT PANEL RATING

HIGH SHORT CIRCUIT RATED PANEL

VOLTAGE

208-230 10kA 100kA 208-230

380 10kA 65kA 380

460 10kA 65kA 460

575 5kA 25kA 575

IOM 1202 13


14 IOM 1202

Lifting & Mounting Weights
Note: Lifting and Mounting Drawings begin on page 19 to show mounting locations, shipping and operating weights, and weight adjustments for accessories and options. All drawings and weights in this manual are applicable to AWS C-vintage models only. The point mounting loads include the evaporator water weight and equals the point operatng weights. If you have additional questions, contact your Daikin Applied representative.

Table 10: Lifting & Mounting Weights (IP units)

L1 L2 L3 L4 L5 L6 L7 L8 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 M12

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

- -

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

3769

MOUNTING LOADS FOR EACH POINT (LBS)

-

-

-

-

-

-- -

3735 2918 15952892 2264 2243 16093364 3333 2988 2961 4096 4059

2208 1793 1745

AWS500CTH 28 3886 3850 3716 3683

3653 3457 3364 2685 2612 22703469 3166 3081 2760 2686 3754AWS475CTH 26 3758 3656 3566

2490 2468 1997 1979 1431 14182440 2417 3762 3727 3408 3377

925

AWS450CTH 24 3653 3620 3405 3374 2888 2862

3150 2141 2131 1556 1549 9292596 1961 1952 3564 3548 3165

- -

AWS410CDH 24 3314 3299 3037 3023 2608

3263 3249 2394 2384 1701 16942414 2403 1897 1888 3598 3581

1317 - -

AWS390CDH 22 3275 3260 2937 2924

3462 3080 3080 2363 2363 13173014 1950 1950 1230 1230 3462AWS350CDH 20 3594 3594 3014

2337 2253 1369 1320 - -1272 1226 3355 3235 3001 2893

-

AWS330CDH 20 3473 3349 2934 2828 1942 1873

2711 1786 1786 1028 1028 -1701 1075 1075 3206 3206 2711

- -

AWS300CDH 16 3065 3065 2455 2455 1701

2711 2711 1786 1786 1028 10281701 1701 1075 1075 3206 3206

808 - -

AWS280CDH 16 3065 3065 2455 2455

3160 2554 2542 1391 1385 8113485 - - - - 3175AWS250CDH 14 4158 4139 3501

1380 1301 821 774 - -- - 3103 2924 2503 2359

-

AWS230CDH 14 4052 3818 3476 3276 - -

2373 1722 1714 - - -- - - 2737 2724 2383AWS210CDH 12 3892 3875 2678 2665 -

15723202 3116 4317 4200 15304005 3896 3194 3108 2426 2360

1433

AWS530CTH 30 4071 3961 3921 3815 3610 3512

3845 3069 3041 2300 2279 14463413 2985 2958 4193 4155 3881

1517 1503

AWS550CTS 30 3963 3927 3794 3760 3444

3782 3748 2889 2863 2203 21833305 3275 2859 2833 4125 4088

2118 1529 1516

AWS525CTS 28 3925 3890 3724 3690

3994 3651 3618 2666 2642 21373695 3097 3069 2455 2432 4030

2079 2060 1488 1474

AWS500CTS 26 4032 3995 3728

3921 3885 3552 3520 2594 2570

1182

24 3816 3782 3556 3524 3014 2987 2544 2521

3635 2473 2496 1867 1884 11712828 2131 2151 4036 4073 3602

- -

AWS450CTS 24 3945 3982 3574 3607 2802

3500 3468 2880 2854 2403 23822618 2594 1994 1976 3738 3705

2318 - -

AWS425CTS 22 3795 3760 3413 3382

3668 3380 3427 2762 2800 22863334 2506 2541 1893 1919 3618

1166 1166 - -

AWS400CTS 22 3664 3715 3288

3434 3434 3030 3030 2272 2272

-

20 3567 3567 2960 2960 1847 1847 1094 1094

3030 2272 2272 1166 1166 -1847 1094 1094 3434 3434 3030

- -

AWS350CDS 20 3567 3567 2960 2960 1847

2950 2936 1769 1761 803 7991679 1672 862 858 3580 3563

807 - -

AWS310CDS 16 3461 3446 2664 2652

3333 2862 2760 1749 1686 837

-

3330 3211 2583 2490 1659 1599 892 860 3457

3175 2519 2508 1264 1258 6383118 - - - - 3190AWS260CDS 14 4207 4188 3132

1264 1258 638 635 - -- - 3190 3175 2519 250814 4207 -4188 3132 3118 -

- - 1498 - -3121 3106 2558 2547 15054364 4345 2547 2536 - -

2498 2387 1548 1479 - -- - - - 3005 287112 4214 4026 2560 2445

1422 1415 - - - -- - 2805 2792 2324 2313

LIFTING WEIGHT FOR EACH POINT (LBS)

AWS190CDS 10 3921 3903 2358 2347 - -

AWS470CTS

AWS250CDS

# OF FANS

AWS225CDS 12

16

AWS210CDS

UNIT SIZE

AWS290CDS

AWS375CDS

- -

635 -

NOTE: Weights shown in this section are for complete packaged units. Consult the remote evaporator installation manual, IOM 1203, for outdoor unit weights less evaporator.

IOM 1202 15


Table 11: Lifting & Mounting Weights (IP units) continued


AWS170CDS VFD 10 3197 3266 2321 2372 1471 1503 - - 1822 1861 1818 1858 1813 1853 1805 1844 - - - -

AWS190CDS VFD 12 3526 3458 2589 2539 1678 1646 - - 1998 1960 2008 1969 2020 1980 2042 2002 - - - -

AWS200CDS VFD 12 3513 3576 2529 2574 1570 1598 - - 2000 2036 1985 2021 1966 2001 1930 1964 - - - -

AWS210CDH VFD 12 3096 3047 2448 2409 1816 1787 - - 1727 1700 1818 1789 1935 1904 2154 2120 - - - -

AWS230CDH VFD 14 2993 3051 2627 2678 2271 2315 - - 2057 2097 1905 1942 1707 1740 1338 1363 1153 1175 - -

AWS250CDH VFD 14 3211 3171 2759 2726 2320 2291 - - 2191 2164 2020 1995 1797 1775 1381 1364 1174 1159 - -

AWS280CDH VFD 16 3477 3508 2595 2618 1736 1751 1023 1032 2213 2232 2091 2109 1932 1949 1635 1649 1392 1404 - -

AWS300CDH VFD 16 3477 3508 2595 2618 1736 1751 1023 1032 2213 2232 2091 2109 1932 1949 1635 1649 1392 1404 - -

AWS330CDH VFD 20 3815 3762 3063 3020 1974 1946 1237 1220 2329 2296 2260 2228 2171 2141 2005 1976 1761 1737 - -

AWS350CDH VFD 20 3916 3967 3136 3176 2006 2031 1241 1257 2388 2419 2314 2344 2217 2246 2037 2063 1773 1796 - -

AWS390CDH VFD 22 3589 3598 3084 3093 2469 2475 1860 1865 2418 2424 2380 2387 2331 2337 2204 2210 2102 2108 - -

AWS410CDH VFD 24 3619 3631 3197 3207 2682 2690 1903 1909 2509 2517 2385 2393 2225 2232 1813 1818 1577 1582 1325 1329

AWS450CTH VFD 24 4013 4022 3599 3607 2920 2927 2331 2336 2645 2651 2556 2562 2441 2447 2142 2147 1980 1985 1796 1800

AWS475CTH VFD 26 4148 4079 3767 3704 3142 3090 2507 2465 2658 2613 2593 2550 2510 2467 2292 2254 2176 2139 2042 2007

AWS500CTH VFD 28 4180 4197 3882 3898 3394 3408 2874 2885 2869 2880 2791 2802 2690 2701 2428 2438 2226 2235 2025 2033

AWS530CTH VFD 30 4380 4323 4096 4042 3629 3581 3018 2979 3084 3043 2995 2956 2880 2843 2582 2548 2300 2270 1986 1960

AWS240CDP VFD 16 3131 3090 2458 2425 1802 1778 1258 1241 2031 2004 1972 1946 1894 1870 1750 1727 1632 1610 - -

AWS265CDP VFD 18 3274 3192 2647 2580 2036 1985 1354 1320 2174 2119 2114 2061 2037 1986 1893 1845 1728 1685 - -

AWS290CDP VFD 18 3428 3435 2799 2806 2187 2192 1504 1507 2308 2313 2257 2262 2190 2195 2066 2070 1924 1928 - -

AWS310CDP VFD 20 3651 3698 3032 3071 2136 2164 1531 1550 2290 2320 2273 2302 2251 2280 2209 2237 2148 2176 - -

AWS330CDP VFD 20 3651 3698 3032 3071 2136 2164 1531 1550 2290 2320 2273 2302 2251 2280 2209 2237 2148 2176 - -

AWS365CDP VFD 22 3496 3422 3125 3058 2672 2615 2224 2177 2441 2389 2449 2397 2460 2408 2489 2436 2512 2459 - -

AWS400CDP VFD 24 3712 3723 3335 3344 2874 2881 2177 2183 2653 2660 2538 2545 2388 2395 2005 2011 1787 1792 1552 1557

- -

- -

- -

- -

- -

- -

- -

MOUNTING LOADS FOR EACH POINT (LBS)

1282 - -1849 1287

1148 11433426 3410 2382 2371 1786 17782830 2818 2265 2255 3833 3815

2117 - -

AWS400CDP 24 3446 3431 3205 3190

3566 3418 3311 2733 2647 21862889 2662 2578 2345 2271 3682

1839 1839

AWS365CDP 22 3190 3089 2982

3321 3321 3057 3057 2562 2562

- -

AWS330CDP 20 3299 2137 2137 1628 1628

3057 3057 2562 2562 1839 18392137 2137 1628 1628 3321 3321

1622 - -

AWS310CDP 20 3299 3299 2889 2889

23633361 3014 16223014 2363

1428

5183

3009 2784 2684

33611654 165421833041AWS290CDP 18 3041

2151AWS265CDP 276718 2870

3299 2889 2889

AWS240CDP 16 2699

2486 2397

2686 2258 1736 1294 1288

UNIT SIZE # OF FANSLIFTING WEIGHT FOR EACH POINT (LBS)

2926 2912 2554 2542

3121 -

1857

14302074

1728

2011 1939 1481

2657 2657

2268

1379 -

NOTE: Weights shown in this section are for complete packaged units. Consult the remote evaporator installation manual, IOM 1203, for outdoor unit weights less evaporator.

16 IOM 1202

Table 12:

L1 L2 L3 L4 L5 L6 L7 L8 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10Unit Size Hz

# OF FANS

LIFTING WEIGHT FOR EACH POINT (KG) MOUNTING LOADS FOR EACH POINT (KG)

AWS190CDS 60 10 1779 1770 1070 1065 - - - -1054 1049 645 642

AWS210CDS 60 12 1912

- -- - 1272 1266

- - - 13631826 1161 1109 - 671 - - -1302 1133 1083 702 -

AWS225CDS 60

14 1908

12 1980

1900 1421 1414 - 573- - - 1447 -AWS250CDS 60 571 289 288 -1440 1143 1138

1900 1421 1414 -AWS260CDS 60 14 1908 288 -1440 1143 1138 573

1171 1129 752 725

571 289- - - 1447

405 390 1568 1512

-

AWS290CDS 60 16 1511 1456 380 366 - -1298 1252 793 765

1563 1209 1203 762AWS310CDS 60 16 1570 362 -1616 1338 1332 802

1343 1343 838 838

799 364758 391 389 1624

496 496 1558 1558

-

AWS350CDS 60 20 1618 1618 529 529 - -1374 1374 1030 1030

1618 1343 1343 838AWS375CDS 60 20 1618 529 -1558 1374 1374 1030

1491 1512 1137 1153

1030 529838 496 496 1558

859 870 1641 1664

-

AWS400CTS 60 22 1662 1685 1037 1051 - -1533 1554 1253 1270

1706 1548 1534 1188AWS425CTS 60 22 1721 1080 -1681 1588 1573 1306

1621 1636 1271 1283

1295 10901177 904 896 1696

967 976 1831 1847

-

AWS450CTS 60 24 1789 1806 847 855 531 5361634 1649 1122 1132

1715 1613 1598 1367AWS470CTS 60 24 1731 934 6751762 1611 1597 1177

1691 1676 1405 1392

1166 9431355 1154 1144 1779

1114 1103 1828 1812

669

AWS500CTS 60 26 1829 1812 969 961 694 6881656 1641 1209 1198

1764 1689 1674 1499AWS525CTS 60 28 1780 990 6881854 1715 1700 1310

1721 1706 1562 1548

1299 9991486 1297 1285 1871

1354 1342 1902 1885

682

AWS550CTS 60 30 1798 1781 1043 1034 656 6501760 1744 1392 1379

1758 1215 1209 -AWS210CDH 60 12 1766 - -1236 1081 1076 781 778 -- - - 1241 -

AWS230CDH 60 14 1838 - - - 14071732 1577 1486 - 590 372 351 -1326 1135 1070 626 -

AWS250CDH 60 14 1886 1877 1588 1581 - - - -1158 1153 631 628

AWS280CDH 60 16 1390

368 367- - 1440 1433

772 488 488 14541390 1114 1114 772 810 466 466 -1454 1230 1230 810 -

AWS300CDH 60 16 1390 1390 1114 1114 772 772 - -1230 1230 810 810

AWS330CDH 60 20 1575

466 466488 488 1454 1454

849 577 556 15221519 1331 1283 881 599 -1467 1361 1312 1060 -

AWS350CDH 60 20 1630 1630 1367 1367

1022 621

- -1397 1397 1072 1072

AWS390CDH 60 22 1485

597 5971571 1571

1090 860 856 16321479 1332 1326 1095 1081 772 768 -1624 1480 1474 1086 -

AWS410CDH 60 24 1503 1496 1378 1371 1183 1178 - -1436 1429 971 967

AWS450CTH 60 24 1657

706 703889 885 1617 1609

1298 11071642 1544 1530 1310

1574 1436 1398

1119 906 8981691 1546 1532 1129

AWS475CTH 60 26 1705 1658 1618 1218 1703 1657

6436491096 1706

1568 1526 1218

AWS500CTH 60 28 1763 18581746 1686 1671 1526 1841 1710 16941355 1343

7921185 1030 1002 813

723

1727 1448 1384 1100 1070 713

1324 1312 1027

180814131637 1593 1452

730

1946 1859

10171512

694

1971 1155 1150 -

1797

1160 1155 683- - - 1416 -680 - - -1409

1847 1779

558 558885 885

1730AWS530CTH 60 30

1252

Lifting & Mounting Weights (SI Units)

IOM 1202 17


Table 13: Lifting & Mounting Weights - (SI units) continued


AWS170CDS VFD 60 10 1450 1481 1053 1076 667 682 - - 826 844 825 843 822 841 819 836 - - - -

AWS190CDS VFD 60 12 1599 1569 1174 1152 761 747 - - 906 889 911 893 916 898 926 908 - - - -

AWS200CDS VFD 60 12 1593 1622 1147 1168 712 725 - - 907 924 900 917 892 908 875 891 - - - -

AWS210CDH VFD 60 12 1404 1382 1110 1093 824 811 - - 784 771 825 811 878 864 977 961 - - - -

AWS230CDH VFD 60 14 1358 1384 1192 1215 1030 1050 - - 933 951 864 881 774 789 607 618 523 533 - -

AWS250CDH VFD 60 14 1456 1439 1252 1236 1052 1039 - - 994 982 916 905 815 805 627 619 532 526 - -

AWS280CDH VFD 60 16 1577 1591 1177 1187 787 794 464 468 1004 1013 948 957 876 884 742 748 631 637 - -

AWS300CDH VFD 60 16 1577 1591 1177 1187 787 794 464 468 1004 1013 948 957 876 884 742 748 631 637 - -

AWS330CDH VFD 60 20 1731 1706 1389 1370 895 883 561 553 1056 1041 1025 1011 985 971 909 896 799 788 - -

AWS350CDH VFD 60 20 1776 1799 1422 1441 910 921 563 570 1083 1097 1050 1063 1006 1019 924 936 804 815 - -

AWS390CDH VFD 60 22 1628 1632 1399 1403 1120 1123 844 846 1097 1100 1080 1083 1057 1060 1000 1002 953 956 - -

AWS410CDH VFD 60 24 1642 1647 1450 1455 1216 1220 863 866 1138 1142 1082 1085 1009 1012 822 825 715 718 601 603

AWS450CTH VFD 60 24 1820 1824 1632 1636 1325 1328 1057 1060 1200 1203 1160 1162 1107 1110 971 974 898 900 814 816

AWS475CTH VFD 60 26 1882 1850 1709 1680 1425 1401 1137 1118 1205 1185 1176 1156 1138 1119 1040 1022 987 970 926 911

AWS500CTH VFD 60 28 1896 1904 1761 1768 1540 1546 1303 1309 1301 1306 1266 1271 1220 1225 1101 1106 1010 1014 918 922

AWS530CTH VFD 60 30 1987 1961 1858 1833 1646 1624 1369 1351 1399 1380 1359 1341 1307 1289 1171 1156 1043 1029 901 889

AWS240CDP VFD 60 16 1420 1401 1115 1100 817 807 571 563 921 909 894 883 859 848 794 783 740 730 - -

AWS265CDP VFD 60 18 1485 1448 1201 1170 924 900 614 599 986 961 959 935 924 901 859 837 784 764 - -

AWS290CDP VFD 60 18 1555 1558 1270 1273 992 994 682 684 1047 1049 1024 1026 993 996 937 939 873 875 - -

AWS310CDP VFD 60 20 1656 1677 1375 1393 969 982 694 703 1039 1052 1031 1044 1021 1034 1002 1015 974 987 - -

AWS330CDP VFD 60 20 1656 1677 1375 1393 969 982 694 703 1039 1052 1031 1044 1021 1034 1002 1015 974 987 - -

AWS365CDP VFD 60 22 1586 1552 1417 1387 1212 1186 1009 987 1107 1084 1111 1087 1116 1092 1129 1105 1140 1115 - -

AWS400CDP VFD 60 24 1684 1689 1513 1517 1303 1307 987 990 1203 1207 1151 1154 1083 1086 910 912 810 813 - -

1128 1087 912 880 672 648 1416 1365AWS265CDP 60 18 1302 1255 649 626 - -1263 1217 976 941

1379 1205 1205 2351AWS290CDP 60 18 1379 736 -1525 1367 1367 1072

1310 1310 969 969

1072 736990 750 750 1525

738 738 1506 1506

-

AWS310CDP 60 20 1496 1496 834 834 - -1387 1387 1162 1162

1496 1310 1310 969AWS330CDP 60 20 1496 834 -1506 1387 1387 1162

1353 1310 1207 1169

1162 834969 738 738 1506

1064 1030 1670 1617

-

AWS365CDP 60 22 1447 1401 992 960 - -1550 1502 1240 1201

1556 1454 1447 1284AWS400CDP 60 24 1563 1547 10801278 1027 1023 1739 -1075 810 806 -1730 1554

-1321 1158AWS240CDP 60 16 1224 587 584 1153 84313271219 1029 7841024 787

Unit Size Hz# OF FANS

LIFTING WEIGHT FOR EACH POINT (KG)

-

- -

- -

-839 584 581

- -

MOUNTING LOADS FOR EACH POINT (KG)

- -

- -

- -

-

18 IOM 1202

Index of Lifting & Mounting Drawings
Index of Lifting & Mounting Drawings
Table 14: Dimension Drawing Index (non-VFD models)

Model Efficiency Fans Figure & Page

AWS190CDS Standard 10 page 20


AWS210CDH High 12 page 20



AWS240CDP Premium 16 page 21


















AWS400CTS Standard 22 page 23



AWS425CTS Standard 22 Figure 18, page 23


AWS450CTH High 24 Figure 20, page 24








Table 15: Dimension Drawing Index (VFD models) Model Efficiency Fans Figure & Page

AWS170CDS Standard 10 Figure 24, page 26



AWS210CDH High 12 Figure 25, page 26


AWS240CDP Premium 16 Figure 27, page 27


















IOM 1202 19

Lifting & Mounting Dimensions (non-VFD)
Figure 11: AWS190CDS (non-VFD)

229.15820

23.6600

82.72100

87.62225

193.34910

7.5190

3.9100

17.0431

188.64791

CON

TRO

L BO

X

L1M1M3L3M5

L2M2M4L4M6AWS 10 FAN DIM. DWG331426601C020A

Figure 12: AWS210CDS/H, AWS225CDS (non-VFD)

229.15820

23.6600

82.72100

87.62225

193.34910

7.5190

3.9100

17.0431

188.64791

CON

TRO

L BO

XL1M1M3L3M5

L2M2M4L4M6

AWS 12 FAN DIM. DWG*3314266020A1*

20 IOM 1202


Figure 13: AWS230CDH, AWS250CDS/H, AWS260CDS (non-VFD)

264.66720

23.660082.7

2100248.46310

87.62225

2.666

193.34910

7.5190

3.9100

17.0431

188.64791

CON

TRO

L BO

X

L1M1M3L3M5M7

L2M2M4L4M6M8 AWS 14 FAN DIM. DWG331426603C020A

Figure 14: AWS240CDP, AWS280CDH, AWS290CDS, AWS300CDH, AWS310CDS (non-VFD)

300.07620

23.660082.7

2100

283.97210

87.62225

2.666

193.34910

7.5190

3.9100

17.0431

93.72381

188.64791

267.46791

CON

TRO

L BO

X

L1M1M3L3L5M5M7 L7

L2M2M4L4L6M6M8 L8AWS 16 FAN DIM. DWG

331426604C020A

IOM 1202 21


Figure 15: AWS265CDP, AWS290CDP (non-VFD)

335.58520

23.6600

82.72100

319.38110

87.62225

2.666

193.34910

7.5190

3.9100

17.0431

93.72381188.6

4791294.67484

CON

TRO

L BO

X

L1M1M3L3L5M5M7 L7

L2M2M4L4L6M6M8 L8AWS 18 FAN DIM. DWG331426605C020A

Figure 16: AWS310CDP, AWS330CDH/P, AWS350CDS/H, AWS375CDS (non-VFD)

370.99421

23.660082.7

2100

354.79010

87.62225

2.666

193.34910

7.5190

3.9100

17.043193.7

2381234.75961

330.18384

CO

NTR

OL

BO

X

L1M1M3L3L5 M5M7 L7

L2M2M4L4L6 M6M8 L8AWS 20 FAN DIM. DWG331426606C020A

22 IOM 1202


Figure 17: AWS365CDP, AWS390CDH (non-VFD)

422.010720

23.6600

82.72100

236.26000

358.79110

87.62225

2.666

7.5190

3.9100

17.043193.7

2381212.65401330.1

8384

CON

TRO

L BO

X

L1M1M3L3L5M5M7 L7

L2M2M4L4L6M6M8 L8 AWS 22 FAN DIM. DWG331426607C020A

Figure 18: AWS400CTS, AWS425CTS (non-VFD)

422.010718

23.6600

82.72100

236.26000

354.38998

87.62225

2.666

7.5190

3.9100

17.0431

93.72381

253.46438

378.69615

CON

TRO

L BO

X

L1L3

L4 L2L6

L5L7

L8

M1M3

M4 M2M6

M5M7

M8 AWS 3C-22 FAN DIM. DWG331426609D020A

IOM 1202 23


Figure 19: AWS400CDP, AWS410CDH (non-VFD)

457.511620

23.6600

82.72100

234.25949

320.88147413.4

10499

87.62225

2.666

7.5190

3.9100

17.043193.7

2381212.65401

392.29962

CON

TRO

L BO

X

L1M1M3L3L5M5M7L7M9

L2M2M4L4L6M6M8L8M10 AWS 24 FAN DIM. DWG331426608C020A

Figure 20: AWS450CTS/H, AWS470CTS (non-VFD)

457.511620

23.6600

82.72100

236.26000

413.410499

87.62225

2.666

7.5190

3.9100

318.88096

17.0431

93.72381253.4

6438392.29962

CO

NTR

OL

BO

X

L1L3

L4 L2L6

L5L7

L8

M1M3

M4 M2M6

M5M7

M8M10

M9

AWS 3C-24 FAN DIM. DWG331426610D020A

24 IOM 1202


Figure 21: AWS475CTH, AWS500CTS (non-VFD)

492.912520

23.6600

82.72100

236.26000

87.62225

7.5190

3.9100

318.88096

413.410501

17.0431

93.72381

253.46438

415.910564

CON

TRO

L BO

X

L1L3

L4 L2L6

L5L7

L8

M1M3

M4 M2M6

M5M7

M8M10

M9

AWS 3C-26 FAN DIM. DWG331426611D020A


528.413420

23.6600

82.72100

236.26000

472.412000

87.62225

2.666

7.5190

3.9100

354.39000

17.0431

93.72381

253.46436

423.610761

CON

TRO

L BO

X

L1L3

L4 L2L6

L5L7

L8

M1M3

M4 M2M6

M5M7

M8M10

M9

AWS 3C-28 FAN DIM. DWG331426612D020B


563.814320

23.6600

82.72100

236.26000

543.313800

87.62225

2.666

7.5190

3.9100

381.79694

17.0431

93.72381253.4

6436462.511746

CO

NTR

OL

BOX

L1L3

L4 L2L6

L5L7

L8

M1M3

M4 M2M6

M5M7

M8M10

M9

AWS 3C-30 FAN DIM. DWG331426613D020B

IOM 1202 25

Lifting & Mounting Dimensions (VFD)
Figure 24: AWS170CDS (VFD)

L2 M2M4L4M6L6M8

333687301AWS-B-0B WITH VFD 10 FAN DIM. DWG

3336873 00C 2 2

00

6.0152

24.0

610

68.0

1727

96.0

2438

143.2

3638

200.3

5089

205.0

5208

240.9

6118

87.62225

7.5190

3.9100

2.666

Ø .750 TYP.19

CONT

ROL B

OX

L1 M1M3L3M5L5M7BOTTOM VIEW

Figure 25: AWS190CDS, AWS200CDS, AWS210CDH (VFD)

333687302

AWS-B-0B WITH VFD 12 FAN DIM. DWG

3336873 00C 2 2

006.015

2

24.0

610

68.0

1727

96.0

2438

143.2

3638

200.3

5089

205.0

5208

240.9

6118

87.62225

7.5190

3.9100

2.666

Ø .750 TYP.19

CONT

ROL B

OX

L1 M1M3L3M5L5M7 BOTTOM VIEW

M2L2M4L4M6L6M8

26 IOM 1202


Figure 26: AWS230CDH, AWS250CDH (VFD)

AWS-B-0B WITH VFD 14 FAN DIM. DWG 3336873 00C 2 2

006.0152

24.061068.0

172796.0

2438

143.23638

200.35089

205.05208

260.26608

276.37018

87.62225

7.5190

3.9100

2.666

Ø .750 TYP.19

CONT

ROL B

OX

L1 M1M3L3M5L5M7

BOTTOM VIEW

M2L2M4L4M6L6M8

M9

M10

Figure 27: AWS240CDP, AWS280CDH, AWS300CDH (VFD)

333687304

AWS-B-0B WITH VFD 16 FAN DIM. DWG00D 2 23336873

006.015

2

24.0

610

68.0

1727

96.0

2438

143.2

3638

200.3

5089

205.0

5208

295.6

7508

311.7

7918

87.62225

7.5190

3.9100

2.666

Ø .750 TYP.19

CONT

ROL B

OX

L1 M1M3L3M5L5M7BOTTOM VIEW

M2L2M4L4M6L6M8

M9

M10

IOM 1202 27


Figure 28: AWS265CDP, AWS290CDP (VFD)

AWS-B-0B WITH VFD 18 FAN DIM. DWG 00 2 23336873

006.0152

24.0

610

68.0

1727

96.0

2438

143.2

3638

200.3

5089

205.0

5208

331.0

8408

347.2

8818

87.62225

7.5190

3.9100

2.666

Ø .750 TYP.19

CONT

ROL B

OX

L1 M1M3L3M5L5M7

BOTTOM VIEW

M2L2M4L4M6L6M8

M9

M10

Figure 29: AWS310CDP, AWS330CDH/P, AWS350CDH (VFD)

Figure 30: AWS365CDP, 390CDH (VFD)

87.62225

2.666

7.5190

3.9100

460.211688

120.83068

61.71568

396.810078

34.3872

250.86369

131.93349

368.29353

274.36968

16.1410

CO

NT

RO

L B

OX

L1M9 M3L3 M5L5M7 M1

L2M10 M4L4 M6L6M8L8

L7

M2

332824701 AWS-B W/ VFD 22 FAN DIM. DWG

28 IOM 1202


Figure 31: AWS400CDP, AWS410CDH (VFD)

87.62225

2.666

7.5190

3.9100

495.612589

120.83068

61.71568

451.611470

34.3872

250.86369

131.93349

430.310930

272.36918

358.99116

16.1410

CO

NT

RO

L B

OX

L1 M1M3L3 M5L5M7M9M11

M12 L2 M2M4L4L6 M6L8 M8M10

L7

332824801 AWS-B W/VFD 24 2C FAN DIM. DWG

Figure 32: AWS450CTH (VFD)

87.62225

2.666

7.5190

3.9100

495.612589

120.83068

61.71568

451.611470

34.3872

291.57404

131.93349

430.310930

274.36968

356.99065

16.1410

CON

TRO

L BO

X

L1 M1M3L3 M5L5 M7M9M11

L2 M2M4L4 M6L6 M8L8

L7

M10M12

332824901 AWS-B W VFD 24 3C FAN DIM. DWG


87.62225

7.5190

3.9100

531.013488

120.83068

61.71568

34.3872

291.57404

131.93349

453.911528

274.36968

356.99065

451.511469

16.1410

CO

NTR

OL

BO

X

L1 M1M3L3 M5L5 M7M9M11

M12 L2 M2M4L4 M6L6 M8L8

L7

M10

332825001 AWS-B WITH VFD 26 FAN DIM. DWG

IOM 1202 29



87.62225

2.666

7.5190

3.9100

566.514388

120.83068

61.71568

510.612968

34.3872

291.57404

131.93349

461.811729

274.36968

392.49968

16.1410

CO

NT

RO

L B

OX

L1 M1M3L3 M5L5 M7M9

M12 L2 M2M4L4 M6L6 M8L8

L7

M10

M11

332825101 AWS-B W/ VFD 28 FAN DIM. DWG


87.62225

2.666

7.5190

3.9100

601.915288

120.83068

61.71568

581.414768

34.3872

291.57404

131.93349

500.612714

274.36968

419.810662

16.1410

CO

NTR

OL

BOX

L1 M1M3L3 M5L5 M7M9

M12 L2 M2M4L4 M6L6 M8L8

L7

M10

M11

332825201AWS-B W/ VFD 30 FAN DIM. DWG

30 IOM 1202

Isolator Locations and Kit Numbers
Transfer the unit as indicated in the Installation section, beginning on page 4. In all cases, set the unit in place and level with a spirit level. When spring-type isolators are required, install springs running under the main unit supports.

The unit should be set initially on shims or blocks at the listed spring free height. When all piping, wiring, flushing, charging, etc., is completed, the springs are adjusted upward to loosen the blocks or shims that are then removed.

A rubber anti-skid pad should be used under isolators if hold-down bolts are not used.

Installation of spring isolators requires flexible piping connections and at least three feet of flexible electrical conduit to avoid straining the piping and transmitting vibration and noise.

Mounting locations for each model can be found in the Lifting & Mounting Dimensions beginning on page 20

Figure 36: Spring Isolators - CP-4

Figure 37: Neoprene-in-Shear Isolators - RP-4

NOTES:

MOUNT MATERIAL TO BE DURULENE RUBBER.1.

MOLDED STEEL AND ELASTOMER MOUNT FOR2.OUTDOOR SERVICE CONDITIONS.

3. RP-4 MOUNT VERSION WITH STUD IN PLACE.ALL DIMENSIONS ARE IN DECIMAL INCHES

DRAWING NUMBER 3314814

1.13 ± .25APPROX.

1.63

.38

DURULENEMATERIAL

RAISED GRIP RIBS

3.00

3.75

5.00

6.25

3.87.56 TYP.

4.63

R.28TYP.

R.250 TYP.

R.750 TYP.RECESSEDGRIP RIBS

ø .500-13NC-2B

R4

R4

VM

&C

VM

&C

IOM 1202 31

http://www.mcquay.com

http://www.mcquay.com


Table 16: Spring Isolators (for 60Hz non-VFD Units with Aluminum Fin Condensers)

UN IT SIZ E# OF

F A N SKit P / N M 1 M 2 M 3 M 4 M 5 M 6 M 7 M 8 M 9 M 10

332620800 332620800 332620800 332620800 332620500 332620500Dark Green Dark Green Dark Green Dark Green Black Black



332620900 332620900 332620800 332620800 332620500 332620500 332620400 332620400Gray Gray Dark Green Dark Green Black Black Red Red


332620900 332620900 332620800 332620800 332620600 332620600 332620400 332620400Gray Gray Dark Green Dark Green Dark Purple Dark Purple Red Red


332620900 332620900 332620900 332620900 332620800 332620800 332620500 332620500Gray Gray Gray Gray Dark Green Dark Green Black Black


332620900 332620900 332620900 332620900 332620800 332620800 332620800 332620800Gray Gray Gray Gray Dark Green Dark Green Dark Green Dark Green


332620900 332620900 332620900 332620900 332620800 332620800 332620800 332620800 332620500 332620500Gray Gray Gray Gray Dark Green Dark Green Dark Green Dark Green Black Black



332621000 332621000 332621000 332621000 332620900 332620900 332620800 332620800 332620500 332620500White White White White Gray Gray Dark Green Dark Green Black Black









332620900 332620900 332620900 332620900 332620800 332620800 332620600 332620600Gray Gray Gray Gray Dark Green Dark Green Dark Purple Dark Purple

332620900 332620900 332620900 332620900 332620800 332620800 332620600 332620600 332620400 332620400Gray Gray Gray Gray Dark Green Dark Green Dark Purple Dark Purple Red Red





332620800 332620800 332620800 332620800 332620600 332620600 332620500 332620500Dark Green Dark Green Dark Green Dark Green Dark Purple Dark Purple B lack Black






332620900 332620900 332620900 332620900 332620800 332620800 332620600 332620600 332620500 332620500Gray Gray Gray Gray Dark Green Dark Green Dark Purple Dark Purple Black Black

332320847

332320846

332320846

332320847

332320850

332320835

332320835

332320828

332320847

332320850

332320828

332320828

332320828

332320829

332320829

332320846

AWS210CDS 12

N/A10

N/A

N/A N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

AWS225CDS 12

AWS250CDS 14

N/A

AWS190CDS

N/A N/A

N/A N/A

N/A N/A

20

N/A

N/A

AWS260CDS 14

AWS290CDS 16

N/A N/A

24

16

22

AWS450CTS 24

AWS400CTS

AWS375CDS 20

AWS310CDS

AWS350CDS

332320850

N/A

AWS500CTS 26

22AWS425CTS N/A

N/A N/A

AWS470CTS

332320848

332320848

N/A

N/A

N/A

N/A

AWS525CTS 28

AWS550CTS 30

AWS210CDH 12 N/AN/A N/A

N/A

AWS250CDH 14

332320829

332320829

AWS280CDH 16

N/A

N/A N/A

N/A

AWS230CDH 14

332320846

AWS300CDH 16

N/A

N/AAWS330CDH 20

AWS350CDH 20

N/A

332320847

AWS390CDH 22 N/A

332320834

332320850

332320850

AWS410CDH

332320849

24

AWS450CTH 24

332320835

332320835

26

AWS530CTH 30

AWS500CTH

N/A N/A

N/A

N/A

28

AWS475CTH

AWS240CDP 16 332320830

332320847

N/A

AWS310CDP

332320848

332320833

N/A N/A

N/A

20

332320848

332320848

AWS265CDP 18

AWS290CDP 20 332320847

N/A

AWS400CDP 24

AWS365CDP 22

N/A

N/A

AWS330CDP 22 N/A

N/A N/A

N/A N/A

32 IOM 1202


Table 17: Spring Isolators (for 60Hz non-VFD Units with Copper Fin Condensers)

UN IT S IZ E# O F


332620800 332620800 332620800 332620800 332620600 332620600Dark Green Dark Green Dark Green Dark Green Dark P urple Dark P urple

332620900 332620900 332620800 332620800 332620600 332620600Gray Gray Dark Green Dark Green Dark P urple Dark P urple

332620900 332620900 332620800 332620800 332620600 332620600Gray Gray Dark Green Dark Green Dark P urple Dark P urple

332620900 332620900 332620800 332620800 332620600 332620600 332620400 332620400Gray Gray Dark Green Dark Green Dark P urple Dark P urple Red Red


332620900 332620900 332620900 332620900 332620800 332620800 332620500 332620500Gray Gray Gray Gray Dark Green Dark Green B lack B lack


332620900 332620900 332620900 332620900 332620800 332620800 332620600 332620600Gray Gray Gray Gray Dark Green Dark Green Dark P urple Dark P urple


332621000 332621000 332620900 332620900 332620900 332620900 332620800 332620800White White Gray Gray Gray Gray Dark Green Dark Green


332621000 332621000 332621000 332621000 332620800 332620800 332620800 332620800 332620500 332620500White White White White Dark Green Dark Green Dark Green Dark Green B lack B lack

332621000 332621000 332621000 332621000 332620800 332620800 332620800 332620800 332620600 332620600White White White White Dark Green Dark Green Dark Green Dark Green Dark P urple Dark P urple

332621000 332621000 332621000 332621000 332620900 332620900 332620800 332620800 332620800 332620800White White White White Gray Gray Dark Green Dark Green Dark Green Dark Green



332620800 332620800 332620800 332620800 332620800 332620800Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green









332621000 332621000 332621000 332621000 332620800 332620800 332620800 332620800 332620600 332620600White White White White Dark Green Dark Green Dark Green Dark Green Dark P urple Dark P urple











N/A N/A

N/A N/A

332320831

332320831

332320846

332320846

332320847

332320847

332320853

332320837

332320832

332320848

332320848

A WS400CDP 24 332320836

N/A N/A

A WS330CDP

A WS365CDP 22 332320832

22 332320848 N/A N/A

A WS310CDP 20

A WS290CDP 20 N/A N/A

N/A N/A

N/A N/A

A WS240CDP

A WS265CDP 18 332320849

16 332320847 N/A N/A

A WS475CTH 26 332320853

N/A

A WS530CTH 30

A WS500CTH 28 332320853

332320853

N/A

A WS450CTH 24 332320837

A WS410CDH 24 332320836

A WS390CDH 22 332320832

N/A N/A

N/A N/AA WS330CDH

A WS350CDH 20 332320849

20 332320849

16

A WS280CDH 16 N/A N/A

N/A N/A

N/A N/A

A WS230CDH

A WS250CDH 14 332320846

14 332320846 N/A N/A

A WS550CTS 30 332320853

A WS210CDH 12 332320852

26 332320853

N/A N/A N/AN/A

A WS450CTS 24 332320836

A WS470CTS 24

A WS400CTS

A WS425CTS 22 332320832

22

N/A

N/A N/A

N/A N/A

N/A N/A

N/A

A WS290CDS

A WS310CDS 16 332320847

16 332320847 N/A N/A

N/A

N/A N/A

N/A

N/A N/A

A WS375CDS 20

N/A

N/A

N/A

332320849

A WS350CDS 20 332320849 N/A

A WS500CTS

A WS525CTS 28

A WS300CDH

N/A N/A

12

A WS250CDS

A WS260CDS 14

A WS210CDS

A WS225CDS 12

14

A WS190CDS 10 332320851 N/A N/A

IOM 1202 33


Table 18: RIS Isolators (for 60Hz non-VFD Units with Aluminum Fin Condensers)

UN IT SIZ E# OF


331481404 331481404 331481403 331481403 331481402 331481402

Gray Gray Green Green Red Red331481404 331481404 331481403 331481403 331481402 331481402


Gray Gray Green Green Red Red331481404 331481404 331481403 331481403 331481402 331481402 331481401 331481401

Gray Gray Green Green Red Red Brown Brown331481404 331481404 331481403 331481403 331481402 331481402 331481401 331481401




Gray Gray Gray Gray Green Green Red Red331481404 331481404 331481404 331481404 331481403 331481403 331481402 331481402


Gray Gray Gray Gray Green Green Green Green331481404 331481404 331481404 331481404 331481403 331481403 331481403 331481403

Gray Gray Gray Gray Green Green Green Green331481405 331481405 331481404 331481404 331481404 331481404 331481402 331481402 331481401 331481401

Purple Purple Gray Gray Gray Gray Red Red Brown Brown331481405 331481405 331481404 331481404 331481404 331481404 331481402 331481402 331481401 331481401


Purple Purple Gray Gray Gray Gray Green Green Red Red331481405 331481405 331481404 331481404 331481404 331481404 331481403 331481403 331481402 331481402


Purple Purple Purple Purple Gray Gray Green Green Red Red331481404 331481404 331481403 331481403 331481402 331481402













Purple Purple Purple Purple Gray Gray Green Green Red Red331481404 331481404 331481403 331481403 331481402 331481402 331481401 331481401







Purple Purple Gray Gray Gray Gray Red Red Brown Brown

N/A

16 332325829 N/A

332325830

N/A

22

N/A

N/A

332325843

N/A

24 332325834

22 332325830

N/A N/A20

N/A

N/A

N/A

N/A

N/A N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

N/A

AWS290CDP

AWS400CDP

AWS310CDP

AWS330CDP

AWS500CTS

AWS550CTS

AWS450CTH

AWS500CTH

AWS240CDP

AWS265CDP

AWS365CDP

AWS210CDS N/A12

AWS190CDS

24 332325834

22 332325843 N/A

AWS330CDH

AWS530CTH

AWS410CDH

AWS390CDH

AWS350CDH

20 332325830

18 332325830

332325845

332325834

30

28 332325844

AWS475CTH 26 332325844

24

12

332325829AWS230CDH

AWS210CDH

AWS250CDH

N/A16 332325829

AWS280CDH 16

AWS300CDH

14

N/A N/A

332325828

332325830

332325829 N/A

N/A

N/A

N/A

N/A

N/A

N/A

AWS260CDS

12

AWS250CDS 14

332325828

14 332325829

332325829

AWS290CDS 16 332325829 N/A

N/AAWS310CDS 16

AWS350CDS 20 332325830

AWS375CDS 332325830

N/A

N/A

N/AN/A

332325829

22 332325843

20

N/A N/AAWS425CTS 22

N/A N/AAWS400CTS

AWS450CTS 24 332325834

30 332325845

AWS525CTS

AWS470CTS

28 332325844

20

33232582914

33232583424

332325843

20 332325830

26 332325844

332325828

10 332325828 N/A N/A

AWS225CDS N/A

N/A N/A

N/A N/A

N/A

N/A

N/A

N/A

34 IOM 1202


Table 19: RIS Isolators (for 60Hz non-VFD Units with Copper Fin Condensers)

UNIT SIZ E# OF

F AN SKit P / N M 1 M 2 M 3 M 4 M 5 M 6 M 7 M 8 M 9 M 10

331481404 331481404 331481403 331481403 331481402 331481402






Gray Gray Gray Gray Red Red Brown Brown331481404 331481404 331481404 331481404 331481402 331481402 331481401 331481401


Purple Purple Gray Gray Gray Gray Green Green331481405 331481405 331481404 331481404 331481404 331481404 331481403 331481403



Purple Purple Gray Gray Gray Gray Green Green331481405 331481405 331481404 331481404 331481403 331481403 331481402 331481402 331481402 331481402

Purple Purple Gray Gray Green Green Red Red Red Red331481405 331481405 331481404 331481404 331481403 331481403 331481403 331481403 331481402 331481402

Purple Purple Gray Gray Green Green Green Green Red Red331481405 331481405 331481405 331481405 331481404 331481404 331481403 331481403 331481402 331481402

Purple Purple Purple Purple Gray Gray Green Green Red Red331481405 331481405 331481405 331481405 331481404 331481404 331481403 331481403 331481402 331481402


Purple Purple Purple Purple Gray Gray Green Green Red Red331481404 331481404 331481403 331481403 331481402 331481402









Purple Purple Gray Gray Green Green Red Red Red Red331481405 331481405 331481404 331481404 331481403 331481403 331481403 331481403 331481402 331481402

Purple Purple Gray Gray Green Green Green Green Red Red331481405 331481405 331481405 331481405 331481404 331481404 331481403 331481403 331481402 331481402



Purple Purple Purple Purple Gray Gray Green Green Red Red331481404 331481404 331481404 331481404 331481404 331481404 331481402 331481402

Gray Gray Gray Gray Gray Gray Red Red331481404 331481404 331481404 331481404 331481404 331481404 331481402 331481402






Purple Purple Gray Gray Green Green Red Red Red Red

N/A N/A

10

N/A

332325833 N/A N/A

AWS400CDP 24 332325835

N/A

N/A N/A

N/A N/A

N/A

AWS330CDP

AWS365CDP 22 332325833

22

AWS310CDP 20 332325833

AWS290CDP 20 332325831

N/A N/A

AWS240CDP

AWS265CDP 18 332325831

16 332325831 N/A N/A

AWS530CTH 30 332325845

AWS500CTH 28 332325845

22 332325833

AWS475CTH 26 332325845

N/A

N/A N/A

N/A

AWS450CTH 24 332325846

AWS410CDH 24 332325835

AWS390CDH

N/A N/A

N/A N/A

AWS330CDH

AWS350CDH 20 332325833

20 332325833

N/A N/A

AWS300CDH 16 332325832

AWS280CDH 16 332325832 N/A N/A

332325828 N/A

N/A N/A

AWS230CDH

AWS250CDH 14 332325829

14 332325829

26 332325845

N/A N/A N/A

AWS550CTS 30 332325845

AWS210CDH 12

332325846

AWS450CTS 24 332325835

AWS500CTS

AWS525CTS

AWS470CTS 24

28 332325845

AWS400CTS

AWS425CTS 22 332325833

22 332325833

N/A N/A

N/A N/A

N/A N/A

N/A N/A

AWS375CDS 20 332325833

AWS350CDS 20 332325833

AWS290CDS

AWS310CDS 16 332325832

16 332325832

N/A N/A

N/A N/A

N/A N/A

N/A N/A

AWS260CDS 14 332325829

332325828

AWS250CDS 14 332325829

N/A N/A

AWS210CDS

AWS225CDS 12 332325828

12 N/A N/AN/A

N/AN/A N/AN/A332325828AWS190CDS

IOM 1202 35


Table 20: Spring Isolators (for 60Hz Units with optional VFD and Aluminum Fin Condensers)

UNIT SIZE# OF FANS Kit P/N M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 M12

332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800

Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green

332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620500 332620500 332620500 332620500

Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Black Black Black Black

332620800 332620800 332620800 332620800 332620800 332620800 332620500 332620500 332620500 332620500


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620500 332620500

Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Black Black

332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620500 332620500


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800

Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green

332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620600 332620600

Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Purple Dark Purple

332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620600 332620600


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800

Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green

332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620900 332620900 332620900 332620900 332620900 332620900 332620800 332620800 332620800 332620800 332620800 332620800

Gray Gray Gray Gray Gray Gray Dark Green Dark Green Dark Green Dark Green Dark Green Dark Green

332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620500 332620500


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620600 332620600


N/A N/A

N/A N/A

N/A N/A N/A N/A

N/A N/A

N/A N/A

N/A N/A N/A N/A

N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

332320824 N/A N/A

332320825

N/A N/A

332320824 N/A N/A

332320824

332320824

332320824

332320825

332320826

332320826

332320827

332320823

332320824

AWS190CDS *VFD* 12 332320821

AWS200CDS *VFD* 12 332320821

AWS210CDH *VFD* 12 332320821

AWS265CDP *VFD* 18

AWS290CDP *VFD*

24

332320824

332320825

20

16

AWS475CTH *VFD* 26

AWS500CTH *VFD* 28

18

30AWS530CTH *VFD*

AWS400CDP *VFD*

24

AWS450CTH *VFD* 24

AWS240CDP *VFD*

AWS350CDH *VFD* 20

AWS390CDH *VFD* 22

AWS330CDP *VFD*

AWS410CDH *VFD*

AWS300CDH *VFD* 16 332320823

AWS330CDH *VFD* 20 332320824

AWS310CDP *VFD* 20

AWS280CDH *VFD* 16 332320823

AWS250CDH *VFD* 14 332320822

AWS365CDP *VFD* 22

AWS170CDS *VFD* 10 332320821

AWS230CDH *VFD* 14 332320822

36 IOM 1202


Table 21: Spring Isolators (for 60Hz Units with optional VFD and Copper Fin Condensers)

UNIT SIZE# OF FANS

Kit P/N M1 M2 M3 M4 M5 M6 M7 M8 M9 M10M11 M12

332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620500 332620500 332620500 332620500


332620800 332620800 332620800 332620800 332620800 332620800 332620500 332620500 332620500 332620500


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620600 332620600


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620600 332620600


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620900 332620900 332620900 332620900 332620900 332620900 332620800 332620800 332620800 332620800 332620800 332620800


332620900 332620900 332620900 332620900 332620900 332620900 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800


332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620800 332620600 332620600


N/A N/A

N/A

N/A N/A

N/A N/A

N/A N/A

N/A

N/A N/A

N/A N/A

N/A N/A

N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A

N/A

N/A N/A

N/A N/A

N/A

N/A N/A

24 332320825

332320824

332320824

332320824

332320827

AWS450CTH *VFD* 24 332320825

18 332320824

26 332320826

332320827

18

AWS500CTH *VFD*

AWS170CDS *VFD* 332320821

AWS190CDS *VFD* 332320821

AWS200CDS *VFD* 332320821

AWS390CDH *VFD*

AWS410CDH *VFD*

AWS350CDH *VFD*

AWS300CDH *VFD*

AWS330CDH *VFD*

AWS210CDH *VFD*

10

12

AWS330CDP *VFD* 20 332320824

12

AWS240CDP *VFD* 16

AWS530CTH *VFD* 30

28

AWS475CTH *VFD*

AWS310CDP *VFD* 20

AWS290CDP *VFD*

AWS265CDP *VFD*

AWS365CDP *VFD* 22 332320824

332320822

20 332320824

22

332320824

AWS400CDP *VFD* 24 332320825

14

12 332320821

14

16 332320824

20 332320824

AWS280CDH *VFD*

332320822

16 332320824

AWS230CDH *VFD*

AWS250CDH *VFD*

IOM 1202 37


Table 22: RIS Isolators (for 60Hz Units with optional VFD and Aluminum Fin Condensers)

UNIT SIZE# OF FANS Kit P/N M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 M12

331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402

Red Red Red Red Red Red Red Red

331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402


331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402


331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402


331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402

Red Red Red Red Red Red Red Red Red Red

331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402


331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402


331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403

Green Green Green Green Green Green Green Green Green Green

331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403

Green Green Green Green Green Green Green Green Green Green Green Green

331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481404 331481404 331481404 331481404 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403

Gray Gray Gray Gray Green Green Green Green Green Green Green Green

331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402 331481402


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

332325822

332325823

332325821

33232582112

AWS400CDP *VFD* 24 332325824

332325821

AWS190CDS *VFD* 12

AWS200CDS *VFD*

AWS330CDP *VFD* 20 332325823

AWS365CDP *VFD* 22 332325823

AWS310CDP *VFD* 20 332325823

332325823

AWS290CDP *VFD* 18 332325823

AWS265CDP *VFD* 18

AWS170CDS *VFD* 10

AWS210CDH *VFD* 12 332325821

332325822

20 332325823

AWS230CDH *VFD* 14 332325822

AWS250CDH *VFD* 14 332325822

AWS280CDH *VFD* 16

AWS350CDH *VFD* 20

AWS330CDH *VFD*

AWS300CDH *VFD* 16

AWS390CDH *VFD* 22 332325823

AWS410CDH *VFD* 24 332325824

AWS450CTH *VFD* 24 332325824

AWS475CTH *VFD* 26 332325824

AWS500CTH *VFD* 28 332325824

AWS530CTH *VFD* 30 332325825

AWS240CDP *VFD* 16 332325822

38 IOM 1202


Table 23: RIS Isolators (for 60Hz Units with optional VFD and Copper Fin Condensers)

UNIT SIZE# OF FANS

Kit P/N M1 M2 M3 M4 M5 M6 M7 M8 M9 M10M11 M12

331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403

Green Green Green Green Green Green Green Green

331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481404 331481404 331481404 331481404 331481404 331481404 331481403 331481403 331481403 331481403 331481403 331481403

Gray Gray Gray Gray Gray Gray Green Green Green Green Green Green

331481404 331481404 331481404 331481404 331481404 331481404 331481403 331481403 331481403 331481403 331481403 331481403

Gray Gray Gray Gray Gray Gray Green Green Green Green Green Green

331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403 331481403


N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/A

N/A N/AN/A N/A

N/A N/A

N/A N/A

12 332325826

332325823

332325823

332325823

AWS400CDP *VFD* 24 332325824

AWS330CDP *VFD* 20 332325823

AWS365CDP *VFD* 22

AWS240CDP *VFD* 16 332325823

AWS310CDP *VFD* 20

AWS265CDP *VFD* 18 332325823

AWS290CDP *VFD* 18

AWS500CTH *VFD* 28 332325827

332325827AWS530CTH *VFD* 30

AWS450CTH *VFD* 24 332325824

AWS475CTH *VFD* 26 332325824

AWS390CDH *VFD* 22 332325823

AWS410CDH *VFD* 24 332325824

AWS330CDH *VFD* 20 332325823

AWS350CDH *VFD* 20 332325823

AWS280CDH *VFD* 16 332325823

AWS300CDH *VFD* 16 332325823

AWS230CDH *VFD* 14 332325823

AWS250CDH *VFD* 14 332325823

AWS210CDH *VFD* 12 332325826

AWS170CDS *VFD* 10 332325826

AWS190CDS *VFD*

AWS200CDS *VFD* 12 332325826

IOM 1202 39


40 IOM 1202

Electrical Data
Electrical Data
Field WiringWiring must comply with all applicable codes and ordinances. Warranty does not cover damage to the equipment caused by wiring not complying with specifications. Pathfinder chillers can be ordered with main power wiring for either multi-point power connection (standard) or single-point connection (optional). If the optional single-point power connection is ordered, a single power connection is made to a power block (or optional disconnect switch) in the unit power panel. A separate disconnect is required if the optional factory-mounted disconnect is not ordered. Factory-mounted isolation circuit breakers for each circuit are included as standard on all single-point connection options.

If the standard multiple-point power wiring is ordered, two power connections are required on Pathfinder chiller models AWS###CDS or three power connections on AWS###CTS. They are made to factory-mounted disconnect switches in the power panel. See the dimension drawings in the current version of the catalog available at www.DaikinApplied.com for entry locations.

It can be desirable to have the unit evaporator heaters on a separate disconnect switch from the main unit power supply so that the unit power can be shut down without defeating the freeze protection provided by the evaporator heaters. See the field wiring diagram on page 42 for connection details. The 120-volt control transformer is factory mounted and wired. .

CAUTION

If a separate disconnect is used for the 120V supply to the unit, it must power the entire control circuit. It must be clearly marked so that it is not accidentally shut off during freezing temperatures, thereby de-energizing the evaporator heaters. Freeze damage to the evaporator could result. If the evaporator is drained for winter freeze protection, the heaters must be de-energized to prevent heater burnout.

CAUTION

Pathfinder unit compressors are single-direction rotation compressors and can be damaged if rotated in the wrong direction. For this reason, proper phasing of electrical power is important. Electrical phasing must be A, B, C for electrical phases 1, 2 and 3 (A=L1, B=L2, C=L3) for single or multiple point wiring arrangements. DO NOT ALTER THE WIRING TO THE STARTERS.

Electrical Data Notes

1 Explanation of field wiring designation:Designation Total Wires Total Conduits

350 MCM 3 1

2-250 MCM 6 1

(2) 250 MCM 6 2

(2) 2-300 MCM 12 2

Note: NOTE: Wire size shown is for illustrative purposes only.2 Allowable voltage limits:

Unit nameplate 460V/60Hz/3Ph: 414V to 506V Unit nameplate 575V/60Hz/3Ph: 517V to 633V

3 Unit wire size ampacity (MCA) is equal to 125% of the largest compressor-motor RLA plus 100% of RLA of all other loads in the circuit including control transformer. Wire size ampacity for separate 115V control circuit power is 15 amps.

4 Compressor RLA values are for wire sizing purposes only, but do reflect normal operating current draw at unit rated capacity.

5 Single-point power supply requires a single disconnect to supply electrical power to the unit. Power must be fused.

6 Multiple point power supply requires a independent power supply for each circuit.

7 All field wiring to unit power block or optional nonfused disconnect switch must be copper.

8 Field wire size values given in tables apply to 75°C rated wire per NEC.

9 External disconnect switch(s) or HACR breakers must be field supplied. A non-fused disconnect switch in the panel is an available option.

10 All wiring must be done in accordance with applicable local and national codes.

11 Recommended time delay fuse size (RFS) is generally equal to 170% of the largest compressor motor RLA plus 100% of remaining compressor RLAs and the sum of condenser fan FLAs. RFS may be impacted by ambient rating. Some chiller models include a medium ambient RFS as well as a high ambient RFS.

12 Maximum time delay fuse size or HACR breakers is equal to 225% of the largest compressor-motor RLA plus 100% of remaining compressor RLAs and the sum of condenser fan FLAs.

13 Power Limitations:Voltage within 10 percent of nameplate rating.Voltage unbalance not to exceed 2% with a resultant cur-rent unbalance of 6 to 10 times the voltage unbalance per NEMA MG-1, 1998 Standard.

14 Circuit Breakers (Non-Compressor VFD Units)The circuit breaker used in the High Short Circuit panel option may have a higher trip rating than the unit Maxi-mum Overload Protection (MOCP) value shown on the unit nameplate. The circuit breaker is installed as a ser-vice disconnect switch and does not function as branch circuit protection, mainly that the protection device must be installed at the point of origin of the power wiring. The breaker (disconnect switch) is oversized to avoid nuisance trips at high ambient temperature conditions.

15 BAS InterfaceThe following installation manuals for optional BAS interface modules are shipped with the chiller and can also be downloaded from www.DaikinApplied.com. IM 966, BACnet® IP Communication ModuleIM 967, BACnet® IP Communication Module MS/TP IM 968, Modbus® Communication ModuleIM 969, LONWORKS Communication Module

Current Inrush

Information on compressor current inrush by starter type can be found in the current version of the catalog at www.DaikinApplied.com and in the electrical data tables on page 44.

IOM 1202 41

Wiring Diagram
Wiring Diagram
Figure 38: Field Wiring Diagram

42 IOM 1202

Wiring Diagram

Figure 39: Field Wiring Diagram (continued)

NOTE:

1. The compressor alarms will not be energized by a unit fault, only the unit alarm will do so. Using the unit alarm and the circuitalarms will include all faults and also designate which compressor has an alarm.

2. The BAS interface modules and the remote display shown above are available as options.

IOM 1202 43

Multipoint Electrical Data (non-VFD)
Table 24: Multipoint Electrical Data (60Hz, standard efficiency, non-VFD models)

M C A R F S M F S M C A R F S M F S M C A R F S M F S

2 0 8 V 4 4 1 6 0 0 7 0 0 4 4 1 6 0 0 7 0 0 - - -

2 3 0 V 3 9 9 6 0 0 6 0 0 3 9 9 6 0 0 6 0 0 - - -

3 8 0 V 2 4 2 3 5 0 4 0 0 2 4 2 3 5 0 4 0 0 - - -

4 6 0 V 2 0 0 3 0 0 3 0 0 2 0 0 3 0 0 3 0 0 - - -

5 7 5 V 1 6 0 2 2 5 2 5 0 1 6 0 2 2 5 2 5 0 - - -

2 0 8 V 4 4 9 6 0 0 7 0 0 5 4 0 8 0 0 8 0 0 - - -

2 3 0 V 4 0 6 6 0 0 6 0 0 4 8 8 7 0 0 8 0 0 - - -

3 8 0 V 2 4 6 3 5 0 4 0 0 2 9 6 4 5 0 5 0 0 - - -

4 6 0 V 2 0 3 3 0 0 3 0 0 2 4 4 3 5 0 4 0 0 - - -

5 7 5 V 1 6 3 2 5 0 2 5 0 1 9 5 3 0 0 3 0 0 - - -

2 0 8 V 5 4 0 8 0 0 8 0 0 5 4 0 8 0 0 8 0 0 - - -

2 3 0 V 4 8 8 7 0 0 8 0 0 4 8 8 7 0 0 8 0 0 - - -

3 8 0 V 2 9 6 4 5 0 5 0 0 2 9 6 4 5 0 5 0 0 - - -

4 6 0 V 2 4 4 3 5 0 4 0 0 2 4 4 3 5 0 4 0 0 - - -

5 7 5 V 1 9 5 3 0 0 3 0 0 1 9 5 3 0 0 3 0 0 - - -

2 0 8 V 5 4 8 8 0 0 8 0 0 6 4 4 1 0 0 0 1 0 0 0 - - -

2 3 0 V 4 9 5 7 0 0 8 0 0 5 8 3 8 0 0 1 0 0 0 - - -

3 8 0 V 3 0 0 4 5 0 5 0 0 3 5 3 5 0 0 6 0 0 - - -

4 6 0 V 2 4 8 3 5 0 4 0 0 2 9 1 4 5 0 5 0 0 - - -

5 7 5 V 1 9 8 3 0 0 3 0 0 2 3 3 3 5 0 4 0 0 - - -

2 0 8 V 6 4 4 1 0 0 0 1 0 0 0 6 4 4 1 0 0 0 1 0 0 0 - - -

2 3 0 V 5 8 3 8 0 0 1 0 0 0 5 8 3 8 0 0 1 0 0 0 - - -

3 8 0 V 3 5 3 5 0 0 6 0 0 3 5 3 5 0 0 6 0 0 - - -

4 6 0 V 2 9 1 4 5 0 5 0 0 2 9 1 4 5 0 5 0 0 - - -

5 7 5 V 2 3 3 3 5 0 4 0 0 2 3 3 3 5 0 4 0 0 - - -

3 8 0 V 3 5 7 5 0 0 6 0 0 4 3 3 6 0 0 7 0 0 - - -

4 6 0 V 2 9 5 4 5 0 5 0 0 3 5 7 5 0 0 6 0 0 - - -

5 7 5 V 2 3 5 3 5 0 4 0 0 2 8 5 4 0 0 4 5 0 - - -

3 8 0 V 4 3 3 6 0 0 7 0 0 4 3 3 6 0 0 7 0 0 - - -

4 6 0 V 3 5 7 5 0 0 6 0 0 3 5 7 5 0 0 6 0 0 - - -

5 7 5 V 2 8 5 4 0 0 4 5 0 2 8 5 4 0 0 4 5 0 - - -

3 8 0 V 4 4 1 6 0 0 7 0 0 4 8 9 7 0 0 8 0 0 - - -

4 6 0 V 3 6 4 5 0 0 6 0 0 4 0 4 6 0 0 7 0 0 - - -

5 7 5 V 2 9 1 4 0 0 5 0 0 3 2 3 5 0 0 5 0 0 - - -

3 8 0 V 4 8 9 7 0 0 8 0 0 4 8 9 7 0 0 8 0 0 - - -

4 6 0 V 4 0 4 6 0 0 7 0 0 4 0 4 6 0 0 7 0 0 - - -

5 7 5 V 3 2 3 5 0 0 5 0 0 3 2 3 5 0 0 5 0 0 - - -

3 8 0 V 3 5 3 5 0 0 6 0 0 3 5 3 5 0 0 6 0 0 3 5 7 5 0 0 6 0 0

4 6 0 V 2 9 1 4 5 0 5 0 0 2 9 1 4 5 0 5 0 0 2 9 5 4 5 0 5 0 0

5 7 5 V 2 3 3 3 5 0 4 0 0 2 3 3 3 5 0 4 0 0 2 3 5 3 5 0 4 0 0

3 8 0 V 3 5 3 5 0 0 6 0 0 3 5 3 5 0 0 6 0 0 4 3 3 6 0 0 7 0 0

4 6 0 V 2 9 1 4 5 0 5 0 0 2 9 1 4 5 0 5 0 0 3 5 7 5 0 0 6 0 0

5 7 5 V 2 3 3 3 5 0 4 0 0 2 3 3 3 5 0 4 0 0 2 8 5 4 0 0 4 5 0

3 8 0 V 4 3 3 6 0 0 7 0 0 4 3 3 6 0 0 7 0 0 3 5 7 5 0 0 6 0 0

4 6 0 V 3 5 7 5 0 0 6 0 0 3 5 7 5 0 0 6 0 0 2 9 5 4 5 0 5 0 0

5 7 5 V 2 8 5 4 0 0 4 5 0 2 8 5 4 0 0 4 5 0 2 3 5 3 5 0 4 0 0

3 8 0 V 4 3 3 6 0 0 7 0 0 4 3 3 6 0 0 7 0 0 4 3 3 6 0 0 7 0 0

4 6 0 V 3 5 7 5 0 0 6 0 0 3 5 7 5 0 0 6 0 0 3 5 7 5 0 0 6 0 0

5 7 5 V 2 8 5 4 0 0 4 5 0 2 8 5 4 0 0 4 5 0 2 8 5 4 0 0 4 5 0

3 8 0 V 4 3 3 6 0 0 7 0 0 4 3 3 6 0 0 7 0 0 4 8 9 7 0 0 8 0 0

4 6 0 V 3 5 7 5 0 0 6 0 0 3 5 7 5 0 0 6 0 0 4 0 4 6 0 0 7 0 0

5 7 5 V 2 8 5 4 0 0 4 5 0 2 8 5 4 0 0 4 5 0 3 2 3 5 0 0 5 0 0

4 6 0 V 4 0 4 6 0 0 7 0 0 4 0 4 6 0 0 7 0 0 3 5 7 5 0 0 6 0 0

5 7 5 V 3 2 3 5 0 0 5 0 0 3 2 3 5 0 0 5 0 0 2 8 5 4 0 0 4 5 0

4 6 0 V 4 0 4 6 0 0 7 0 0 4 0 4 6 0 0 7 0 0 4 0 4 6 0 0 7 0 0

5 7 5 V 3 2 3 5 0 0 5 0 0 3 2 3 5 0 0 5 0 0 3 2 3 5 0 0 5 0 0

M o d e l S iz e

H z V o lt a g e

M u lt ip le P o in t F ie ld D a t a - C ir c u it # 1

M u l t ip le P o in t F ie ld D a t a - C ir c u it # 2

M u lt ip le P o in t F ie ld D a t a - C ir c u it # 3

R a t in g s R a t in g s R a t in g s

1 9 0 C D S 6 0

2 1 0 C D S 6 0

2 2 5 C D S 6 0

2 5 0 C D S 6 0

2 6 0 C D S 6 0

2 9 0 C D S 6 0

3 1 0 C D S 6 0

3 5 0 C D S 6 0

3 7 5 C D S 6 0

4 0 0 C T S 6 0

4 2 5 C T S 6 0

4 5 0 C T S 6 0

4 7 0 C T S 6 0

5 0 0 C T S 6 0

5 2 5 C T S 6 0

5 5 0 C T S 6 0

44 IOM 1202


Table 25: Multipoint Electrical Data (60Hz, high efficiency, non-VFD models),

M C A RFS M FS M C A RFS M FS M C A RFS M FS

208V 463 700 700 463 700 700 - - -

230V 418 600 700 418 600 700 - - -

380V 253 350 400 253 350 400 - - -

460V 209 300 350 209 300 350 - - -

575V 168 250 250 168 250 250 - - -

208V 470 700 800 566 800 800 - - -

230V 425 600 700 513 700 800 - - -

380V 258 350 400 310 450 500 - - -

460V 213 300 350 256 350 400 - - -

575V 170 250 250 205 300 350 - - -

208V 566 800 800 566 800 800 - - -

230V 513 700 800 513 700 800 - - -

380V 310 450 500 310 450 500 - - -

460V 256 350 400 256 350 400 - - -

575V 205 300 350 205 300 350 - - -

208V 574 800 800 669 1000 1000 - - -

230V 519 700 800 604 800 1000 - - -

380V 314 450 500 365 500 600 - - -

460V 260 400 400 302 450 500 - - -

575V 208 300 350 242 350 400 - - -

208V 669 1000 1000 669 1000 1000 - - -

230V 604 800 1000 604 800 1000 - - -

380V 365 500 600 365 500 600 - - -

460V 302 450 500 302 450 500 - - -

575V 242 350 400 242 350 400 - - -

380V 374 500 600 474 700 800 - - -

460V 309 450 500 392 600 600 - - -

575V 247 350 400 313 450 500 - - -

380V 474 700 800 474 700 800 - - -

460V 392 600 600 392 600 600 - - -

575V 313 450 500 313 450 500 - - -

380V 474 700 800 528 800 800 - - -

460V 392 600 600 436 600 700 - - -

575V 313 450 500 349 500 600 - - -

380V 528 800 800 528 800 800 - - -

460V 436 600 700 436 600 700 - - -

575V 349 500 600 349 500 600 - - -

380V 365 500 600 365 500 600 365 500 600

460V 302 450 500 302 450 500 302 450 500

575V 242 350 400 242 350 400 242 350 400

380V 365 500 600 365 500 600 474 700 800

460V 302 450 500 302 450 500 392 600 600

575V 242 350 400 242 350 400 313 450 500

380V 474 700 800 474 700 800 365 500 600

460V 392 600 600 392 600 600 302 450 500

575V 313 450 500 313 450 500 242 350 400

380V 474 700 800 474 700 800 474 700 800

460V 392 600 600 392 600 600 392 600 600

575V 313 450 500 313 450 500 313 450 500

210C DH 60

230C DH 60

250C DH 60

280C DH 60

60

390C DH 60

M o d e l Siz e

Hz V o ltag e

M u lt ip le Po in t Fie ld Data - C ir cu it #1

330C DH 60

350C DH



Rat in g s Rat in g s Rat in g s

300C DH 60

410C DH 60

450C T H 60

475C T H 60

500C T H 60

530C T H 60

IOM 1202 45


Table 26: Multipoint Electrical Data (60Hz, premium efficiency, non-VFD models), continued

M CA RFS M FS M CA RFS M FS

208V 478 700 800 478 700 800

230V 432 600 700 432 600 700380V 262 350 400 262 350 400460V 216 300 350 216 300 350575V 173 250 250 173 250 250208V 485 700 800 581 800 800

230V 439 600 700 526 800 800380V 266 400 400 318 450 500460V 219 300 350 263 400 450575V 176 250 250 211 300 350208V 581 800 800 581 800 800

230V 526 800 800 526 800 800380V 318 450 500 318 450 500460V 263 400 450 263 400 450575V 211 300 350 211 300 350208V 589 800 1000 684 1000 1000

230V 533 800 800 618 1000 1000380V 322 450 500 374 500 600460V 267 400 450 309 450 500575V 213 300 350 247 350 400

208V 684 1000 1000 684 1000 1000230V 618 1000 1000 618 1000 1000380V 374 500 600 374 500 600460V 309 450 500 309 450 500575V 247 350 400 247 350 400

380V 374 500 600 482 700 800460V 309 450 500 398 600 600575V 247 350 400 319 450 500380V 482 700 800 482 700 800

460V 398 600 600 398 600 600575V 319 450 500 319 450 500

400CDP 60

265CDP 60

290CDP 60

310CDP 60

M ultiple Point Fie ld Data - Circuit #1

M ultiple Point Fie ld Data - Circuit #2

Ratings Ratings

240CDP 60

M ode l Size

Hz Voltage

330CDP 60

365CDP 60

46 IOM 1202

Multipoint Field Wiring Data (non-VFD)
Table 27: Multipoint Field Wiring Data (60Hz, Standard efficiency, non -VFD models)

Circuit #1 Circuit #2

Std Lug Size Std Lug Size

208 (2) 3/0-500MCM (2) 3/0-500MCM

230 (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM

380 (1) 6-350MCM (1) 6-350MCM

460 (1) 6-350MCM (1) 6-350MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (2) 3/0-500MCM (2) 3/0-500MCM

230 (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM (2) 3/0-500MCM

380 (1) 6-350MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM

460 (1) 6-350MCM (1) 6-350MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (2) 3/0-500MCM (2) 3/0-500MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM


460 (1) 6-350MCM (1) 6-350MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (2) 3/0-500MCM (3) 2/0-400MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM


460 (1) 6-350MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (3) 2/0-400MCM (3) 2/0-400MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM



575 (1) 6-350MCM (1) 6-350MCM

208 (3) 2/0-400MCM (3) 2/0-400MCM

230 (2) 3/0-500MCM (3) 2/0-400MCM380 (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM (2) 3/0-500MCM460 (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM575 (1) 6-350MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM

208 (3) 2/0-400MCM (3) 2/0-400MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM



208 (3) 2/0-400MCM (4) 4/0-500MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM



208 (4) 4/0-500MCM (4) 4/0-500MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM



AWS210CDS 60

AWS225CDS 60

AWS250CDS 60

AWS260CDS 60

AWS290CDS 60

Model Size Hz Voltage

AWS190CDS 60

AWS310CDS 60

AWS350CDS 60

AWS375CDS 60

Disconnect Sw itch / HSCCR Circuit Breaker

IOM 1202 47


Table 28: Multipoint Field Wiring Data (60Hz, Standard efficiency, non-VFD models), continued

Cir cu it #1 C ir cu it #2 C ir cu it #3

Std L u g Siz e Std L u g Siz e Std L u g Siz e

208 (3) 2/0-400MCM (3) 2/0-400MCM (3) 2/0-400MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

380(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575 (1) 6-350MCM (1) 6-350MCM (1) 6-350MCM

208 (3) 2/0-400MCM (3) 2/0-400MCM (3) 2/0-400MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM (3) 2/0-400MCM

380(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(2) 3/0-500MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575 (1) 6-350MCM (1) 6-350MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

208 (3) 2/0-400MCM (3) 2/0-400MCM (3) 2/0-400MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM (2) 3/0-500MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 6-350MCM

208 (3) 2/0-400MCM (3) 2/0-400MCM (3) 2/0-400MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM (3) 2/0-400MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

208 (3) 2/0-400MCM (3) 2/0-400MCM (4) 4/0-500MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM (3) 2/0-400MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

208 (4) 4/0-500MCM (4) 4/0-500MCM (3) 2/0-400MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM (3) 2/0-400MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

208 (4) 4/0-500MCM (4) 4/0-500MCM (4) 4/0-500MCM230 (3) 2/0-400MCM (3) 2/0-400MCM (3) 2/0-400MCM380 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

M o d e l Siz e Hz V o ltag e

Dis co n n e ct Sw itch / HSCCR C ir cu it Br e ak e r

A WS400CTS 60

A WS425CTS 60

A WS450CTS

A WS550CTS 60

60

A WS470CTS 60

A WS500CTS 60

A WS525CTS 60

48 IOM 1202


Table 29: Multipoint Field Wiring Data (60Hz, high efficiency, non-VFD models)

Circuit #1 Circuit #2

Std Lug Size Std Lug Size

208 (2) 3/0-500MCM (2) 3/0-500MCM


380 (1) 6-350MCM (1) 6-350MCM

460 (1) 6-350MCM (1) 6-350MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (2) 3/0-500MCM (2) 3/0-500MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM

380 (1) 6-350MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM

460 (1) 6-350MCM (1) 6-350MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (2) 3/0-500MCM (2) 3/0-500MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM


460 (1) 6-350MCM (1) 6-350MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (2) 3/0-500MCM (3) 2/0-400MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM


460 (1) 6-350MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (3) 2/0-400MCM (3) 2/0-400MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM



575 (1) 6-350MCM (1) 6-350MCM

208 (3) 2/0-400MCM (4) 4/0-500MCM

230 (2) 3/0-500MCM (3) 2/0-400MCM

380 (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM (2) 3/0-500MCM


575 (1) 6-350MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM

208 (4) 4/0-500MCM (4) 4/0-500MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM



208 (4) 4/0-500MCM (4) 4/0-500MCM

230 (3) 2/0-400MCM (4) 4/0-500MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM

460 (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM (2) 3/0-500MCM


208 (4) 4/0-500MCM (4) 4/0-500MCM

230 (4) 4/0-500MCM (4) 4/0-500MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM

460 (2) 3/0-500MCM (2) 3/0-500MCM


Dis conne ct Sw itch / HSCCR Circuit Bre ak e r

A WS350CDH 60

A WS390CDH 60

A WS410CDH 60

60

A WS280CDH 60

A WS300CDH 60

A WS330CDH 60

M ode l Hz V oltage

A WS210CDH 60

A WS230CDH 60

A WS250CDH

IOM 1202 49


Table 30: Multipoint Field Wiring Data (60Hz, High efficiency, non-VFD models), continued

Circuit #1 Circuit #2 Circuit #3

Std Lug Size Std Lug Size Std Lug Size

208 (3) 2/0-400MCM (3) 2/0-400MCM (3) 2/0-400MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

380(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575 (1) 6-350MCM (1) 6-350MCM (1) 6-350MCM

208 (3) 2/0-400MCM (3) 2/0-400MCM (4) 4/0-500MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM (3) 2/0-400MCM

380(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(2) 3/0-500MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575 (1) 6-350MCM (1) 6-350MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

208 (4) 4/0-500MCM (4) 4/0-500MCM (3) 2/0-400MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM (2) 3/0-500MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 6-350MCM

208 (4) 4/0-500MCM (4) 4/0-500MCM (4) 4/0-500MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM (3) 2/0-400MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

460(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

M ode l Hz V oltage

Dis conne ct Sw itch / HSCCR Circuit Bre ak e r

A WS450CTH 60

A WS475CTH 60

A WS500CTH 60

A WS530CTH 60

50 IOM 1202


Table 31: Multipoint Field Wiring Data (60Hz, Premium efficiency, non-VFD models)

Circuit #1 Circuit #2Std Lug Size Std Lug Size

208 (2) 3/0-500MCM (2) 3/0-500MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM380 (1) 6-350MCM (1) 6-350MCM460 (1) 6-350MCM (1) 6-350MCM575 (1) 6-350MCM (1) 6-350MCM

208 (2) 3/0-500MCM (2) 3/0-500MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM


460 (1) 6-350MCM (1) 6-350MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (2) 3/0-500MCM (2) 3/0-500MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM


460 (1) 6-350MCM (1) 6-350MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (2) 3/0-500MCM (4) 4/0-500MCM

230 (2) 3/0-500MCM (2) 3/0-500MCM



575 (1) 6-350MCM (1) 6-350MCM

208 (4) 4/0-500MCM (4) 4/0-500MCM230 (2) 3/0-500MCM (2) 3/0-500MCM380 (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM460 (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM

575 (1) 6-350MCM (1) 6-350MCM

208 (3) 2/0-400MCM (4) 4/0-500MCM

230 (2) 3/0-500MCM (3) 2/0-400MCM

380 (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM (2) 3/0-500MCM


575 (1) 6-350MCM (1) 3/0 to 500 MCM & (2) 3/0 to 250MCM

208 (4) 4/0-500MCM (4) 4/0-500MCM

230 (3) 2/0-400MCM (3) 2/0-400MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM



Model Hz Voltage

Disconnect Sw itch / HSCCR Circuit Breaker

AWS240CDP 60

AWS265CDP 60

AWS290CDP 60

AWS310CDP 60

AWS330CDP 60

AWS365CDP 60

AWS400CDP 60

IOM 1202 51

Terminal Amps (non-VFD) (single/multi-point)
Table 32: Terminal Amps Electrical Data (60Hz)

208V 323 323 -- 7.5 23 2368 2368 - 1373 1373 - 789 789 -230V 292 292 -- 6.8 23 2119 2119 - 1229 1229 - 706 706 -380V 177 177 -- 4.1 16 1194 1194 - 693 693 - 398 398 -460V 146 146 -- 3.4 14 976 976 - 566 566 - 326 326 -575V 117 117 -- 2.7 11 846 846 - 491 491 - 282 282 -

208V 323 396 -- 7.5 23 2368 2788 - 1373 1617 - 789 929 -230V 292 358 -- 6.8 23 2119 2339 - 1229 1357 - 706 780 -380V 177 217 -- 4.1 16 1194 1410 - 693 818 - 398 470 -460V 146 179 -- 3.4 14 976 1157 - 566 671 - 326 386 -575V 117 143 -- 2.7 11 846 885 - 491 513 - 282 295 -

208V 396 396 -- 7.5 23 2788 2788 - 1617 1617 - 929 929 -230V 358 358 -- 6.8 23 2339 2339 - 1357 1357 - 780 780 -380V 217 217 -- 4.1 16 1410 1410 - 818 818 - 470 470 -460V 179 179 -- 3.4 14 1157 1157 - 671 671 - 386 386 -575V 143 143 -- 2.7 11 885 885 - 513 513 - 295 295 -

208V 396 473 -- 7.5 23 2788 2788 - 1617 1617 - 929 929 -230V 358 428 -- 6.8 23 2339 2339 - 1357 1357 - 780 780 -380V 217 259 -- 4.1 16 1410 1410 - 818 818 - 470 470 -460V 179 214 -- 3.4 14 1157 1157 - 671 671 - 386 386 -575V 143 171 -- 2.7 11 885 885 - 513 513 - 295 295 -

208V 473 473 -- 7.5 23 2788 2788 - 1617 1617 - 929 929 -230V 428 428 -- 6.8 23 2339 2339 - 1357 1357 - 780 780 -380V 259 259 -- 4.1 16 1410 1410 - 818 818 - 470 470 -460V 214 214 -- 3.4 14 1157 1157 - 671 671 - 386 386 -575V 171 171 -- 2.7 11 885 885 - 513 513 - 295 295 -

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 259 320 -- 4.1 16 1410 2524 - 818 1464 - 470 841 -460V 214 264 -- 3.4 14 1157 1947 - 671 1129 - 386 649 -575V 171 211 -- 2.7 11 885 1663 - 513 965 - 295 554 -

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 320 320 -- 4.1 16 2524 2524 - 1464 1464 - 841 841 -460V 264 264 -- 3.4 14 1947 1947 - 1129 1129 - 649 649 -575V 211 211 -- 2.7 11 1663 1663 - 965 965 - 554 554 -

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 320 358 -- 4.1 16 2524 2524 - 1464 1464 - 841 841 -460V 264 296 -- 3.4 14 1947 1947 - 1129 1129 - 649 649 -575V 211 237 -- 2.7 11 1663 1663 - 965 965 - 554 554 -

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 358 358 -- 4.1 16 2524 2524 - 1464 1464 - 841 841 -460V 296 296 -- 3.4 14 1947 1947 - 1129 1129 - 649 649 -575V 237 237 -- 2.7 11 1663 1663 - 965 965 - 554 554 -

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 259 259 259 4.1 16 1410 1410 1410 818 818 818 470 470 470460V 214 214 214 3.4 14 1157 1157 1157 671 671 671 386 386 386575V 171 171 171 2.7 11 885 885 885 513 513 513 295 295 295

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 259 259 320 4.1 16 1410 1410 2524 818 818 1464 470 470 841460V 214 214 264 3.4 14 1157 1157 1947 671 671 1129 386 386 649575V 171 171 211 2.7 11 885 885 1663 513 513 965 295 295 554

425CTS 60 22

60 22

350CDS 60 20

375CDS 60 20

400CTS

290CDS 60 16

310CDS 60 16

250CDS 60 14

260CDS 60 14

210CDS 60 12

225CDS 60 12

190CDS 60 10

Rated Load Amps

CIR 1 CIR 2 CIR 3 CIR 1 CIR 2

FanMotorFLA

FanMotorLRA

Compressor LRAInrush Amps

Solid State StarterInrush Amps

Y-Delta Starter

CIR 3 CIR 1 CIR 2 CIR 3 CIR 1 CIR 2 CIR 3Model HZ Voltage

Compressor# of Fans

52 IOM 1202


Table 33: Terminal Amps Electrical Data (60Hz), continued

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 320 320 259 4.1 16 2524 2524 1410 1464 1464 818 841 841 470460V 264 264 214 3.4 14 1947 1947 1157 1129 1129 671 649 649 386575V 211 211 171 2.7 11 1663 1663 885 965 965 513 554 554 295

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 320 320 320 4.1 16 2524 2524 2524 1464 1464 1464 841 841 841460V 264 264 264 3.4 14 1947 1947 1947 1129 1129 1129 649 649 649575V 211 211 211 2.7 11 1663 1663 1663 965 965 965 554 554 554

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 320 320 358 4.1 16 2524 2524 2524 1464 1464 1464 841 841 841460V 264 264 296 3.4 14 1947 1947 1947 1129 1129 1129 649 649 649575V 211 211 237 2.7 11 1663 1663 1663 965 965 965 554 554 554

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 358 358 320 4.1 16 2524 2524 2524 1464 1464 1464 841 841 841460V 296 296 264 3.4 14 1947 1947 1947 1129 1129 1129 649 649 649575V 237 237 211 2.7 11 1663 1663 1663 965 965 965 554 554 554

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 358 358 358 4.1 16 2524 2524 2524 1464 1464 1464 841 841 841460V 296 296 296 3.4 14 1947 1947 1947 1129 1129 1129 649 649 649575V 237 237 237 2.7 11 1663 1663 1663 965 965 965 554 554 554

208V 334 334 -- 7.5 23 2368 2368 - 1373 1373 - 789 789 -230V 302 302 -- 6.8 23 2119 2119 - 1229 1229 - 706 706 -380V 183 183 -- 4.1 16 1194 1194 - 693 693 - 398 398 -460V 151 151 -- 3.4 14 976 976 - 566 566 - 326 326 -575V 121 121 -- 2.7 11 846 846 - 491 491 - 282 282 -

208V 334 411 -- 7.5 23 2368 2788 - 1373 1617 - 789 929 -230V 302 372 -- 6.8 23 2119 2339 - 1229 1357 - 706 780 -380V 183 225 -- 4.1 16 1194 1410 - 693 818 - 398 470 -460V 151 186 -- 3.4 14 976 1157 - 566 671 - 326 386 -575V 121 149 -- 2.7 11 846 885 - 491 513 - 282 295 -

208V 411 411 -- 7.5 23 2788 2788 - 1617 1617 - 929 929 -230V 372 372 -- 6.8 23 2339 2339 - 1357 1357 - 780 780 -380V 225 225 -- 4.1 16 1410 1410 - 818 818 - 470 470 -460V 186 186 -- 3.4 14 1157 1157 - 671 671 - 386 386 -575V 149 149 -- 2.7 11 885 885 - 513 513 - 295 295 -

208V 411 487 -- 7.5 23 2788 2788 - 1617 1617 - 929 929 -230V 372 440 -- 6.8 23 2339 2339 - 1357 1357 - 780 780 -380V 225 266 -- 4.1 16 1410 1410 - 818 818 - 470 470 -460V 186 220 -- 3.4 14 1157 1157 - 671 671 - 386 386 -575V 149 176 -- 2.7 11 885 885 - 513 513 - 295 295 -

208V 487 487 -- 7.5 23 2788 2788 - 1617 1617 - 929 929 -230V 440 440 -- 6.8 23 2339 2339 - 1357 1357 - 780 780 -380V 266 266 -- 4.1 16 1410 1410 - 818 818 - 470 470 -460V 220 220 -- 3.4 14 1157 1157 - 671 671 - 386 386 -575V 176 176 -- 2.7 11 885 885 - 513 513 - 295 295 -

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 266 346 -- 4.1 16 1410 2524 - 818 1464 - 470 841 -460V 220 286 -- 3.4 14 1157 1947 - 671 1129 - 386 649 -575V 176 229 -- 2.7 11 885 1663 - 513 965 - 295 554 -

330CDH 60 20

280CDH 60 16

300CDH 60 16

230CDH 60 14

250CDH 60 14

550CTS 60 30

210CDH 60 12

500CTS 60 26

525CTS 60 28

CIR 3

450CTS 60 24

470CTS 60 24

CIR 2 CIR 3 CIR 1 CIR 2 CIR 3 CIR 1

FanMotorFLA

FanMotorLRA

Compressor LRA Inrush Amps


Y-Delta Starter

CIR 2CIR 1Model HZ

Rated Load Amps

CIR 1 CIR 2 CIR 3Voltage

Compressor# of Fans

IOM 1202 53



208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 346 346 -- 4.1 16 2524 2524 - 1464 1464 - 841 841 -460V 286 286 -- 3.4 14 1947 1947 - 1129 1129 - 649 649 -575V 229 229 -- 2.7 11 1663 1663 - 965 965 - 554 554 -

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 346 383 -- 4.1 16 2524 2524 - 1464 1464 - 841 841 -460V 286 316 -- 3.4 14 1947 1947 - 1129 1129 - 649 649 -575V 229 253 -- 2.7 11 1663 1663 - 965 965 - 554 554 -

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 383 383 -- 4.1 16 2524 2524 - 1464 1464 - 841 841 -460V 316 316 -- 3.4 14 1947 1947 - 1129 1129 - 649 649 -575V 253 253 -- 2.7 11 1663 1663 - 965 965 - 554 554 -

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 266 266 266 4.1 16 1410 1410 1410 818 818 818 470 470 470460V 220 220 220 3.4 14 1157 1157 1157 671 671 671 386 386 386575V 176 176 176 2.7 11 885 885 885 513 513 513 295 295 295

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 266 266 346 4.1 16 1410 1410 2524 818 818 1464 470 470 841460V 220 220 286 3.4 14 1157 1157 1947 671 671 1129 386 386 649575V 176 176 229 2.7 11 885 885 1663 513 513 965 295 295 554

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V -- -- -- -- -- -- -- -- -- -- -- -- -- --460V 286 286 220 3.4 14 1947 1947 1157 1129 1129 671 649 649 386575V 229 229 176 2.7 11 1663 1663 885 965 965 513 554 554 295

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V -- -- -- -- -- -- -- -- -- -- -- -- -- --460V 286 286 286 3.4 14 1947 1947 1947 1129 1129 1129 649 649 649575V 229 229 229 2.7 11 1663 1663 1663 965 965 965 554 554 554

208V 334 334 -- 7.5 23 2368 2368 -- 1373 1373 -- 789 789 --230V 302 302 -- 6.8 23 2119 2119 -- 1229 1229 -- 706 706 --380V 183 183 -- 4.1 16 1194 1194 -- 693 693 -- 398 398 --460V 151 151 -- 3.4 14 976 976 -- 566 566 -- 326 326 --575V 121 121 -- 2.7 11 846 846 -- 491 491 -- 282 282 --

208V 334 411 -- 7.5 23 2368 2788 -- 1373 1617 -- 789 929 --230V 302 372 -- 6.8 23 2119 2339 -- 1229 1357 -- 706 780 --380V 183 225 -- 4.1 16 1194 1410 -- 693 818 -- 398 470 --460V 151 186 -- 3.4 14 976 1157 -- 566 671 -- 326 386 --575V 121 149 -- 2.7 11 846 885 -- 491 513 -- 282 295 --

208V 411 411 -- 7.5 23 2788 2788 -- 1617 1617 -- 929 929 --230V 372 372 -- 6.8 23 2339 2339 -- 1357 1357 -- 780 780 --380V 225 225 -- 4.1 16 1410 1410 -- 818 818 -- 470 470 --460V 186 186 -- 3.4 14 1157 1157 -- 671 671 -- 386 386 --575V 149 149 -- 2.7 11 885 885 -- 513 513 -- 295 295 --

208V 411 487 -- 7.5 23 2788 2788 -- 1617 1617 -- 929 929 --230V 372 440 -- 6.8 23 2339 2339 -- 1357 1357 -- 780 780 --380V 225 266 -- 4.1 16 1410 1410 -- 818 818 -- 470 470 --460V 186 220 -- 3.4 14 1157 1157 -- 671 671 -- 386 386 --575V 149 176 -- 2.7 11 885 885 -- 513 513 -- 295 295 --

310CDP 60 20

18

240CDP 60 16

265CDP 60 18

290CDP 60

500CTH 60 28

530CTH 60 30

450CTH 60 24

475CTH 60 26

410CDH 60 24

350CDH 60 20

390CDH

FanMotorLRA

Compressor LRAInrush Amps


Y-Delta Starter

CIR 2 CIR 3 CIR 1Model HZ

60 22

Rated Load Amps

CIR 2 CIR 3CIR 2 CIR 3 CIR 1 CIR 2 CIR 3 CIR 1

FanMotorFLACIR 1

Voltage

Compressor# of Fans

54 IOM 1202



208V 487 487 -- 7.5 23 2788 2788 -- 1617 1617 -- 929 929 --230V 440 440 -- 6.8 23 2339 2339 -- 1357 1357 -- 780 780 --380V 266 266 -- 4.1 16 1410 1410 -- 818 818 -- 470 470 --460V 220 220 -- 3.4 14 1157 1157 -- 671 671 -- 386 386 --575V 176 176 -- 2.7 11 885 885 -- 513 513 -- 295 295 --

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 266 346 -- 4.1 16 1410 2524 -- 818 1464 -- 470 841 --460V 220 286 -- 3.4 14 1157 1947 -- 671 1129 -- 386 649 --575V 176 229 -- 2.7 11 885 1663 -- 513 965 -- 295 554 --

208V -- -- -- -- -- -- -- -- -- -- -- -- -- --230V -- -- -- -- -- -- -- -- -- -- -- -- -- --380V 346 346 -- 4.1 16 2524 2524 -- 1464 1464 -- 841 841 --460V 286 286 -- 3.4 14 1947 1947 -- 1129 1129 -- 649 649 --575V 229 229 -- 2.72 11 1663 1663 -- 965 965 -- 554 554 --

CIR 1

400CDP 60 24

330CDP 60 20

365CDP 60 22

CIR 2 CIR 3 CIR 1

FanMotorFLA

FanMotorLRA

Compressor LRA Inrush Amps


Y-Delta Starter

CIR 2 CIR 3Model HZ Voltage

CIR 2 CIR 3

Rated Load Amps

CIR 1 CIR 2 CIR 3 CIR 1

Compressor# of Fans

IOM 1202 55

Single-point Electrical Data (non-VFD)
Table 36: Single-point Electrical Data (60 Hz, Standard efficiency, non-VFD models)

MCA RFS MFS

208V 802 1000 1000230V 725 1000 1000380V 439 600 600

460V 363 450 500

575V 290 350 400

208V 908 1200 1200230V 821 1000 1000380V 498 600 700

460V 411 500 500

575V 328 400 450

208V 981 1200 1200230V 887 1200 1200380V 538 700 700

460V 444 600 600

575V 354 450 450

208V 1092 1200 1200230V 988 1200 1200380V 598 800 800

460V 494 600 700

575V 395 500 500

208V 1169 1600 1600230V 1058 1200 1200380V 640 800 800

460V 529 700 700

575V 423 500 500

380V 725 1000 1000460V 598 800 800

575V 478 600 600

380V 786 1000 1000460V 648 800 800

575V 518 700 700

380V 850 1200 1200460V 702 800 800575V 561 700 700380V 888 1200 1200460V 734 1000 1000575V 587 700 800380V 932 1000 1000460V 770 800 800

575V 615 700 700

380V 1008 1200 1200

460V 833 1000 1000575V 665 800 800

380V 1077 1200 1200

460V 890 1000 1000575V 711 800 800

380V 1138 1200 1200

460V 940 1200 1200575V 751 800 800

380V 1194 1200 1200

460V 986 1200 1200575V 789 1000 1000

460V 1025 1200 1200575V 820 1000 1000

460V 1064 1200 1200575V 851 1000 1000

550CTS 60

470CTS 60

500CTS 60

525CTS 60

350CDS 60

375CDS 60

400CTS 60

225CDS 60

250CDS 60

260CDS 60

Model Size

Hz

190CDS 60

210CDS 60

425CTS 60

450CTS 60

290CDS 60

310CDS 60

Voltage

(Wire 75°C for SP Power Block / Disconnect Sw, 90°C for SP HSCCR)

Ratings

56 IOM 1202


Table 37: Single-point Electrical Data (60 Hz, High efficiency, non-VFD models)

MCA RFS MFS

2 0 8 V 8 4 2 1 0 0 0 1 0 0 02 3 0 V 7 6 1 1 0 0 0 1 0 0 03 8 0 V 4 6 1 6 0 0 600

4 6 0 V 3 8 1 4 5 0 500

5 7 5 V 3 0 5 4 0 0 400

2 0 8 V 9 5 3 1 2 0 0 1 2 0 02 3 0 V 8 6 2 1 2 0 0 1 2 0 03 8 0 V 5 2 2 7 0 0 700

4 6 0 V 4 3 1 6 0 0 600

5 7 5 V 3 4 5 4 5 0 450

2 0 8 V 1 0 3 0 1 2 0 0 1 2 0 02 3 0 V 9 3 2 1 2 0 0 1 2 0 03 8 0 V 5 6 4 7 0 0 700

4 6 0 V 4 6 6 6 0 0 600

5 7 5 V 3 7 3 4 5 0 500

2 0 8 V 1 1 4 0 1 6 0 0 1 6 0 02 3 0 V 1 0 3 1 1 2 0 0 1 2 0 03 8 0 V 6 2 3 8 0 0 800

4 6 0 V 5 1 5 7 0 0 700

5 7 5 V 4 1 2 5 0 0 500

2 0 8 V 1 2 1 6 1 6 0 0 1 6 0 02 3 0 V 1 0 9 9 1 2 0 0 1 2 0 03 8 0 V 6 6 4 8 0 0 800

4 6 0 V 5 4 9 7 0 0 700

5 7 5 V 4 3 9 6 0 0 600

3 8 0 V 7 8 1 1 0 0 0 1 0 0 04 6 0 V 6 4 6 8 0 0 800

5 7 5 V 5 1 6 7 0 0 700

3 8 0 V 8 6 1 1 2 0 0 1 2 0 04 6 0 V 7 1 2 8 0 0 8 0 05 7 5 V 5 6 9 7 0 0 7 0 03 8 0 V 9 1 5 1 2 0 0 1 2 0 04 6 0 V 7 5 6 1 0 0 0 1 0 0 05 7 5 V 6 0 5 8 0 0 8 0 03 8 0 V 9 6 0 1 2 0 0 1 2 0 04 6 0 V 7 9 3 1 0 0 0 1 0 0 05 7 5 V 6 3 4 7 0 0 8 0 0380V 963 1200 1200

460V 797 1000 1000575V 637 800 800

380V 1071 1200 1200

460V 886 1000 1000575V 709 800 800

380V 1159 1200 1200

460V 959 1200 1200575V 767 800 800

380V 1248 1200 1200460V 1032 1200 1200

575V 825 1000 1000

500CTH 60

530CTH 60

410CDH 60

450CTH 60

475CTH 60

330CDH 60

350CDH 60

390CDH 60

250CDH 60

280CDH 60

300CDH 60

Model Siz e

Hz Vo lta ge

(W ire 7 5 °C fo r SP P o w e r B lo c k / D is c o n n e c t Sw , 9 0 °C fo r SP H SC C R)

Ra t in gs

210CDH 60

230CDH 60

IOM 1202 57


Table 38: Single-point Electrical Data (60 Hz, Premium efficiency, non-VFD models)

MCA RFS MFS

208V 872 1200 1200

230V 788 1000 1000

380V 477 600 600

460V 394 500 500575V 316 400 400

208V 983 1200 1200

230V 889 1200 1200

380V 538 700 700

460V 445 600 600575V 356 450 500

208V 1060 1200 1200

230V 959 1200 1200

380V 580 700 800

460V 480 600 600575V 384 450 500

208V 1170 1600 1600

230V 1058 1200 1200

380V 640 800 800

460V 529 700 700575V 423 500 500

380V 681 800 800

460V 563 700 700575V 450 600 600

380V 789 1000 1000460V 652 800 800

575V 522 700 700

380V 877 1200 1200

460V 725 1000 1000575V 580 700 800

365CDP 60

400CDP 60

290CDP 60

310CDP 60

330CDP 60

V oltage

(W ire 75°C for SP Powe r Block / Dis conne ct Sw, 90°C for SP HSCCR)

Ratings

240CDP 60

265CDP 60

Model Size

Hz

58 IOM 1202

Single-point Field Wiring Data (non-VFD)
Table 39: Single-point Field Wiring Data (60 Hz, Standard efficiency, non-VFD models)

Pow e r Block Dis conne ct Sw itchHSCCR Circuit

Bre ak e rStd Lug Size Std Lug Size Std Lug Size

208 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

230 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM

380 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

460 (2) 6-500MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

575 (2) 6-500MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

208 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

230 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM380 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

575 (2) 6-500MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

208 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

230 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM380 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

575 (2) 6-500MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM

208 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

230 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

380 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM

460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

575 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

208 (4) 2-600MCM -- --

230 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

380 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM

460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

575 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

208 (4) 2-600MCM -- --

230 (4) 2-600MCM -- --

380 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM

460 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM

575 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

230 (4) 2-600MCM -- --

380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

460 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM

575 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

460 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM

575 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

460 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM

575 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM

A WS310CDS 60

A WS350CDS 60

A WS375CDS 60

A WS250CDS 60

A WS260CDS 60

A WS290CDS 60

V oltage

A WS190CDS 60

A WS210CDS 60

A WS225CDS 60

M ode l Hz

IOM 1202 59


Table 40: Single-point Field Wiring Data (60 Hz, Standard efficiency, non-VFD models) continued

Pow er Block Disconnect Sw itchHSCCR Circuit

Breaker

Std Lug Size Std Lug Size Std Lug Size

380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

575 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM

380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

575 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM

380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

575 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM

380 (4) 2-600MCM -- --

460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

575 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM

380 (4) 2-600MCM -- --

460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

575 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

380 (4) 2-600MCM -- --

460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

575 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

380 (4) 2-600MCM -- --

460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

575 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

Model Hz Voltage

AWS450CTS 60

AWS470CTS 60

AWS500CTS 60

60

AWS400CTS 60

AWS425CTS 60

AWS525CTS

60AWS550CTS

60 IOM 1202


Table 41: Single-point Field Wiring Data (60 Hz, High efficiency, non-VFD models)

Po w e r Blo ck Dis co n n e ct Sw itchHSC C R C ir cu it

Br e ak e rStd L u g Siz e Std L u g Siz e Std L u g Siz e

208 (4) 2-600MCM (4) 4 /0-500MCM (4) 4 /0-500MCM230 (4) 2-600MCM (4) 4 /0-500MCM (4) 4 /0-500MCM

380 (2) 6-500MCM (2) 3 /0-500MCM (2) 3 /0-500MCM

460 (2) 6-500MCM(1) 3 /0 to 500 MCM &

(2) 3 /0 to 250MCM(1) 3 /0 to 500 MCM &

(2) 3 /0 to 250MCM

575 (2) 6-500MCM(1) 3 /0 to 500 MCM &

(2) 3 /0 to 250MCM(1) 3 /0 to 500 MCM &

(2) 3 /0 to 250MCM



575 (2) 6-500MCM(1) 3 /0 to 500 MCM &

(2) 3 /0 to 250MCM(1) 3 /0 to 500 MCM &

(2) 3 /0 to 250MCM



575 (2) 6-500MCM(1) 3 /0 to 500 MCM &

(2) 3 /0 to 250MCM(1) 3 /0 to 500 MCM &

(2) 3 /0 to 250MCM


380 (2) 6-500MCM (3) 2 /0-400MCM (3) 2 /0-400MCM460 (2) 6-500MCM (2) 3 /0-500MCM (2) 3 /0-500MCM575 (2) 6-500MCM (2) 3 /0-500MCM (2) 3 /0-500MCM

208 (4) 2-600MCM -- - -230 (4) 2-600MCM (4) 4 /0-500MCM (4) 4 /0-500MCM


575 (2) 6-500MCM (2) 3 /0-500MCM (2) 3 /0-500MCM

230 (4) 2-600MCM -- - -380 (4) 2-600MCM (4) 4 /0-500MCM (4) 4 /0-500MCM





575 (2) 6-500MCM (3) 2 /0-400MCM (3) 2 /0-400MCM


380 (4) 2-600MCM (4) 4 /0-500MCM (4) 4 /0-500MCM


380 (4) 2-600MCM -- - -460 (4) 2-600MCM (4) 4 /0-500MCM (4) 4 /0-500MCM575 (4) 2-600MCM (4) 4 /0-500MCM (4) 4 /0-500MCM

380 (4) 2-600MCM -- - -


A W S475CTH 60

A W S500CTH 60

A W S390CDH 60

A W S410CDH 60

A W S300CDH 60

A W S330CDH 60

A W S230CDH 60

A W S250CDH 60

A W S280CDH 60

M o d e l Hz V o ltag e

A W S210CDH 60

A W S350CDH 60

A W S450CTH 60

A W S530CTH 60

IOM 1202 61


Table 42: Single-point Field Wiring Data (60 Hz, Premium efficiency, non-VFD models)

P o w e r Blo c k Dis c o n n e c t S w it c hHS C C R C ir c u it

Br e a k e r

S t d L u g S iz e S t d L u g S iz e S t d L u g S iz e

2 0 8 ( 4 ) 2 - 6 0 0 MCM ( 4 ) 4 /0 - 5 0 0 MCM ( 4 ) 4 /0 - 5 0 0 MCM2 3 0 ( 4 ) 2 - 6 0 0 MCM ( 4 ) 4 /0 - 5 0 0 MCM ( 4 ) 4 /0 - 5 0 0 MCM3 8 0 ( 2 ) 6 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM

4 6 0 ( 2 ) 6 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM

5 7 5 ( 2 ) 6 - 5 0 0 MCM( 1 ) 3 /0 to 5 0 0 MCM &

( 2 ) 3 /0 to 2 5 0 MCM( 1 ) 3 /0 to 5 0 0 MCM &

( 2 ) 3 /0 to 2 5 0 MCM


4 6 0 ( 2 ) 6 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM

5 7 5 ( 2 ) 6 - 5 0 0 MCM( 1 ) 3 /0 to 5 0 0 MCM &

( 2 ) 3 /0 to 2 5 0 MCM( 1 ) 3 /0 to 5 0 0 MCM &

( 2 ) 3 /0 to 2 5 0 MCM


4 6 0 ( 2 ) 6 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM

5 7 5 ( 2 ) 6 - 5 0 0 MCM( 1 ) 3 /0 to 5 0 0 MCM &

( 2 ) 3 /0 to 2 5 0 MCM( 1 ) 3 /0 to 5 0 0 MCM &

( 2 ) 3 /0 to 2 5 0 MCM

2 0 8 ( 4 ) 2 - 6 0 0 MCM - - - -2 3 0 ( 4 ) 2 - 6 0 0 MCM ( 4 ) 4 /0 - 5 0 0 MCM ( 4 ) 4 /0 - 5 0 0 MCM3 8 0 ( 2 ) 6 - 5 0 0 MCM ( 3 ) 2 /0 - 4 0 0 MCM ( 3 ) 2 /0 - 4 0 0 MCM

4 6 0 ( 2 ) 6 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM5 7 5 ( 2 ) 6 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM


4 6 0 ( 2 ) 6 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM5 7 5 ( 2 ) 6 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM


5 7 5 ( 2 ) 6 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM ( 2 ) 3 /0 - 5 0 0 MCM


A W S 2 9 0 CDP 6 0

A W S 3 1 0 CDP 6 0

A W S 3 3 0 CDP 6 0

M o d e l Hz V o lt a g e

A W S 2 4 0 CDP 6 0

A W S 2 6 5 CDP 6 0

A W S 3 6 5 CDP 6 0

A W S 4 0 0 CDP 6 0

62 IOM 1202

Multipoint Electrical Data (VFD)
Multipoint Electrical Data (VFD)
Table 43: Multipoint Electrical Data (60Hz, standard, high, and premium efficiency, VFD models)

MCA RFS MFS MCA RFS MFS MCA RFS MFS380V 218 300 350 218 300 350 - - -460V 180 250 300 180 250 300 - - -380V 222 300 350 266 400 450 - - -460V 183 250 300 219 300 350 - - -380V 266 400 450 266 400 450 - - -460V 219 300 350 219 300 350 - - -380V 277 400 450 277 400 450 - - -460V 229 350 350 229 350 350 - - -380V 281 400 450 336 500 500 - - -460V 233 350 400 278 400 450 - - -380V 336 500 500 336 500 500 - - -460V 278 400 450 278 400 450 - - -380V 340 500 500 393 600 600 - - -460V 281 400 450 325 500 500 - - -380V 393 600 600 393 600 600 - - -460V 325 500 500 325 500 500 - - -380V 401 600 600 474 700 800 - - -460V 332 500 500 392 600 600 - - -380V 474 700 800 474 700 800 - - -460V 392 600 600 392 600 600 - - -

390CDH 460V 392 600 600 460 700 700 - - -410CDH 460V 460 700 700 460 700 700 - - -

380V 393 600 600 393 600 600 393 600 600460V 325 500 500 325 500 500 325 500 500

475CTH 460V 325 500 500 325 500 500 392 600 600500CTH 460V 392 600 600 392 600 600 325 500 500530CTH 460V 392 600 600 392 500 600 392 600 600

380V 285 400 450 285 400 450 - - -460V 236 350 400 236 350 400 - - -380V 289 400 450 344 500 500 - - -460V 239 350 400 284 400 450 - - -380V 344 500 500 344 500 500 - - -460V 284 400 450 284 400 450 - - -380V 349 500 500 401 600 600 - - -460V 288 400 450 332 500 500 - - -380V 401 600 600 401 600 600 - - -460V 332 500 500 332 500 500 - - -380V 401 600 600 482 700 800 - - -460V 332 500 500 398 600 600 - - -380V 482 700 800 482 700 800 - - -460V 398 600 600 398 600 600 - - -

230CDH

250CDH

280CDH

300CDH

210CDH

200CDS

190CDS

Multiple Point Field Data - Circuit #3 Ratings

170CDS

Model Size Voltage

Multiple Point Field Data - Circuit #1

Multiple Point Field Data - Circuit #2

Ratings Ratings

310CDP

330CDP

365CDP

400CDP

330CDH

350CDH

450CTH

240CDP

265CDP

290CDP

IOM 1202 63

Multipoint Field Wiring Data (VFD)
Multipoint Field Wiring Data (VFD)
Table 44: Multipoint Field Wiring Data (VFD models)

Circuit #1 Circuit #2 Circuit #3Std Lug Size Std Lug Size Std Lug Size

380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (1) 6-350MCM (1) 6-350MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 2/0-400MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 2/0-400MCM (2) 2/0-400MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 2/0-400MCM --460 (2) 3/0-500MCM (2) 2/0-400MCM --460 (2) 2/0-400MCM (2) 2/0-400MCM --460 (2) 2/0-400MCM (2) 2/0-400MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCM460 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

A W S475CTH 60 460 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCMA W S500CTH 60 460 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCMA W S530CTH 60 460 (2) 3/0-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 3/0-500MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 3/0-500MCM (2) 2/0-400MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --380 (2) 2/0-400MCM (2) 2/0-400MCM --460 (2) 3/0-500MCM (2) 3/0-500MCM --

A W S400CDP 60

A W S310CDP 60

A W S330CDP 60

A W S365CDP 60

A W S240CDP 60

A W S265CDP 60

A W S290CDP 60

A W S390CDH 60

A W S410CDH 60

A W S450CTH 60

A W S300CDH 60

A W S330CDH 60

A W S350CDH 60

A W S230CDH 60

A W S250CDH 60

A W S280CDH 60

A W S190CDS 60

A W S200CDS 60

A W S210CDH 60

M ode l Hz V oltage

Disconne ct Sw itch / HSCCR Circuit Bre ake r

A W S170CDS 60

64 IOM 1202

Terminal Amps (VFD) (single- and multi-point)
Terminal Amps (VFD) (single- and multi-point)
Table 45: Terminal Amps Electrical Data (60Hz)

380V 158 158 - - 4 .1 16 158 158 - -

460V 130 130 - - 3 .4 14 130 130 - -

380V 158 193 - - 4 .1 16 158 193 - -

460V 130 159 - - 3 .4 14 130 159 - -

380V 193 193 - - 4 .1 16 193 193 - -460V 159 159 - - 3 .4 14 159 159 - -

380V 202 202 - - 4 .1 16 202 202 - -460V 167 167 - - 3 .4 14 167 167 - -

380V 202 246 - - 4 .1 16 202 246 - -460V 167 203 - - 3 .4 14 167 203 - -

380V 246 246 - - 4 .1 16 246 246 - -460V 203 203 - - 3 .4 14 203 203 - -

380V 246 288 - - 4 .1 16 246 288 - -460V 203 238 - - 3 .4 14 203 238 - -

380V 288 288 - - 4 .1 16 288 288 - -460V 238 238 - - 3 .4 14 238 238 - -

380V 288 346 - - 4 .1 16 288 346 - -460V 238 286 - - 3 .4 14 238 286 - -

380V 346 346 - - 4 .1 16 346 346 - -

460V 286 286 - - 3 .4 14 286 286 - -

380V 346 406 - - 4 .1 16 - - - - - -

460V 286 335 - - 3 .4 14 286 335 - -

380V - - - - - - - - - - - - - - - -

460V 335 335 - - 3 .4 14 335 335 - -

380V 288 288 288 4 .1 16 288 288 288

460V 238 238 238 3 .4 14 238 238 238

380V - - - - - - - - - - - - - - - -

460V 238 238 286 3 .4 14 238 238 286

380V - - - - - - - - - - - - - - - -

460V 286 286 238 3 .4 14 286 286 238

380V - - - - - - - - - - - - - - - -460V 286 286 286 3 .4 14 286 286 286

380V 202 202 - - 4 .1 16 202 202 - -460V 167 167 - - 3 .4 14 167 167 - -

380V 202 246 - - 4 .1 16 202 246 - -460V 167 203 - - 3 .4 14 167 203 - -

380V 246 246 - - 4 .1 16 246 246 - -

460V 203 203 - - 3 .4 14 203 203 - -

380V 246 288 - - 4 .1 16 246 288 - -

460V 203 238 - - 3 .4 14 203 238 - -

380V 288 288 - - 4 .1 16 288 288 - -460V 238 238 - - 3 .4 14 238 238 - -

380V 288 346 - - 4 .1 16 288 346 - -460V 238 286 - - 3 .4 14 238 286 - -

380V 346 346 - - 4 .1 16 346 346 - -460V 286 286 - - 3 .4 14 286 286 - -

400CDP V FD

60 12

330CDP V FD

60 10

365CDP V FD

60 10 /12

310CDP V FD

60 10

265CDP V FD

60 9

290CDP V FD

60 9

530CTH V FD

60 10

240CDP V FD

60 8

500CTH V FD

60 10 /10 /8

475CTH V FD

60 8 /8 /10

450CTH V FD

60 8

410CDH V FD

60 12

390CDH V FD

60 10 /12

350CDH V FD

60 10

300CDH V FD

60 8

330CDH V FD

60 10

250CDH V FD

60 7

280CDH V FD

60 8

210CDH V FD

60 6

230CDH V FD

60 7

190CDS V FD

60 6

200CDS V FD

60 6

170CDS V FD

60 5

Ra ted Load A mps

CIR 1 CIR 2 CIR 3 CIR 1 CIR 2 CIR 3Mode l Hz V o ltage

Compres s o rF a n #

p e r C irc u it

FanMo to rFLA

FanMoto rLRA

In rus h A mps V FD

IOM 1202 65

Single-point Electrical Data (VFD)
Single-point Electrical Data (VFD)
Table 46: Single-point Electrical Data (60 Hz, Standard, High and Premium efficiency, VFD models)

MCA RFS MFS

3 8 0 V 3 9 7 5 0 0 5 0 04 6 0 V 3 2 7 4 0 0 4 5 03 8 0 V 4 4 9 5 0 0 6 0 04 6 0 V 3 7 0 4 5 0 5 0 03 8 0 V 4 8 4 6 0 0 6 0 04 6 0 V 3 9 9 5 0 0 5 0 03 8 0 V 5 0 4 6 0 0 7 0 04 6 0 V 4 1 7 4 5 0 / 5 0 0 5 0 03 8 0 V 5 6 7 7 0 0 8 0 04 6 0 V 4 6 8 5 0 0 / 6 0 0 6 0 03 8 0 V 6 1 1 7 0 0 8 0 04 6 0 V 5 0 4 6 0 0 7 0 03 8 0 V 6 7 2 8 0 0 8 0 04 6 0 V 5 5 5 6 0 0 / 7 0 0 7 0 03 8 0 V 7 1 4 8 0 0 1 0 0 0

4 6 0 V 5 9 0 7 0 0 8 0 0

3 8 0 V 8 0 3 1 0 0 0 1 0 0 0

4 6 0 V 6 6 4 7 0 0 / 8 0 0 8 0 0

3 8 0 V 8 6 1 1 0 0 0 1 2 0 0

4 6 0 V 7 1 2 8 0 0 8 0 0

3 9 0 C D H 6 0 4 6 0 V 7 8 0 1 0 0 0 1 0 0 0

4 1 0 C D H 6 0 4 6 0 V 8 3 5 1 0 0 0 1 0 0 0

3 8 0 V 1 0 3 4 1 2 0 0 1 2 0 0

4 6 0 V 8 5 5 1 0 0 0 1 0 0 0

4 7 5 C T H 6 0 4 6 0 V 9 2 2 1 0 0 0 1 2 0 0

5 0 0 C T H 6 0 4 6 0 V 9 7 7 1 2 0 0 1 2 0 0

5 3 0 C T H 6 0 4 6 0 V 1 0 3 2 1 2 0 0 1 2 0 03 8 0 V 5 2 0 6 0 0 7 0 04 6 0 V 4 3 0 4 5 0 / 5 0 0 5 0 03 8 0 V 5 8 3 7 0 0 8 0 04 6 0 V 4 8 2 5 0 0 / 6 0 0 6 0 03 8 0 V 6 2 7 8 0 0 8 0 04 6 0 V 5 1 8 6 0 0 7 0 03 8 0 V 6 8 8 8 0 0 8 0 04 6 0 V 5 6 9 6 0 0 / 7 0 0 8 0 03 8 0 V 7 3 0 8 0 0 1 0 0 0

4 6 0 V 6 0 4 7 0 0 8 0 0

3 8 0 V 8 1 1 1 0 0 0 1 0 0 0

4 6 0 V 6 7 0 7 0 0 / 8 0 0 8 0 0

3 8 0 V 8 7 7 1 0 0 0 1 2 0 0

4 6 0 V 7 2 5 8 0 0 1 0 0 0

3 6 5 C D P 6 0

4 0 0 C D P 6 0

2 9 0 C D P 6 0

3 1 0 C D P 6 0

3 3 0 C D P 6 0

4 5 0 C T H 6 0

2 4 0 C D P 6 0

2 6 5 C D P 6 0

3 0 0 C D H 6 0

3 3 0 C D H 6 0

3 5 0 C D H 6 0

2 3 0 C D H 6 0

2 5 0 C D H 6 0

2 8 0 C D H 6 0

1 9 0 C D S 6 0

2 0 0 C D S 6 0

2 1 0 C D H 6 0

Mo d e l S iz e

Hz V o l t a g e

(W i r e 7 5 ° C fo r S P P o w e r B l o c k / D i s c o n n e c t S w . - 9 0 ° C fo r S P H S C C R )

R a t i n g s

1 7 0 C D S 6 0

Note: RFS ratings shown with dual values represent medium ambient/high ambient ratings.

66 IOM 1202

Single-point Field Wiring Data (VFD)
Single-point Field Wiring Data (VFD)
Table 47: Single-point Field Wiring Data (VFD models)

Power Block Disconnect Switch HSCCR Circuit BreakerStd Lug Size Std Lug Size Std Lug Size

380 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

460 (1) 2-600MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM380 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM

460 (1) 2-600MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM(1) 3/0 to 500 MCM &

(2) 3/0 to 250MCM380 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM380 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM380 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM380 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM380 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM380 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM460 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM460 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM460 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM

AWS390CDH 60 460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCMAWS410CDH 60 460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

AWS475CTH 60 460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCMAWS500CTH 60 460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCMAWS530CTH 60 460 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM

380 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM380 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM380 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM380 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM460 (2) 6-500MCM (2) 3/0-500MCM (2) 3/0-500MCM380 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM460 (2) 6-500MCM (3) 2/0-400MCM (3) 2/0-400MCM380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM460 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM380 (4) 2-600MCM (4) 4/0-500MCM (4) 4/0-500MCM460 (2) 6-500MCM (4) 4/0-500MCM (4) 4/0-500MCM

AWS400CDP 60

AWS310CDP 60

AWS330CDP 60

AWS365CDP 60

AWS240CDP 60

AWS265CDP 60

AWS290CDP 60

AWS330CDH 60

AWS350CDH 60

AWS450CTH 60

AWS250CDH 60

AWS280CDH 60

AWS300CDH 60

AWS200CDS 60

AWS210CDH 60

AWS230CDH 60

M odel Hz Voltage

AWS170CDS 60

AWS190CDS 60

IOM 1202 67

Pressure Drop Data
Pressure Drop Data
Note: Pressure drop curves reflect fixed flow system minimums.

Figure 40: Evaporator Pressure Drop: AWS models 170/190 Standard Efficiency

170 STD

190 STD

0

10

20

30

0 100 200 300 400 500 600 700

PD(ft)

Flow Rate (gpm)

AWS-C Evaporator Pressure Drop Curves Evaporator EV40271010/9 N2

GP M D P ft . l/sD P

k p a GP M D P ft . l/sD P



k p a

1 7 0 S T D 6 0 1 1 6 .6 1 .4 7 .4 4 .2 2 1 6 .8 4 .4 1 3 .7 1 3 .2 3 9 0 .2 1 2 .4 2 4 .6 3 7 .1 5 9 6 .9 2 6 .3 3 7 .7 7 8 .6

1 9 0 S T D 6 0 1 2 9 .2 1 .7 8 .2 5 .1 2 4 0 .1 5 .3 1 5 .1 1 5 .8 4 3 2 .2 1 4 .9 2 7 .3 4 4 .5 5 9 6 .9 2 6 .3 3 7 .7 7 8 .6

M a x im u m Flo w R a teV a r ia b le Flo w S ys te m O n ly

M in im u m Flo w R a teFix e d Flo w S ys te m O n ly

M in im u m Flo w R a te N o m in a l Flo w R a te

M o d e l H z

Figure 41: Evaporator Pressure Drop: AWS models 210 Standard Efficiency and 210 High Efficiency

210 STD

210 High

0

10

20

30

0 100 200 300 400 500 600 700 800

PD(ft)

Flow Rate (gpm)






k p a

2 1 0 S T D 6 0 1 4 4 .5 1 .4 9 .1 4 .2 2 6 8 .4 4 .1 1 6 .9 1 2 .3 4 8 3 .1 1 1 .7 3 0 .5 3 5 .0 7 4 8 .0 2 5 .3 4 7 .2 7 5 .6

2 1 0 Hig h 6 0 1 4 7 .6 1 .4 9 .3 4 .2 2 7 4 .3 4 .3 1 7 .3 1 2 .9 4 9 3 .6 1 2 .1 3 1 .1 3 6 .2 7 4 8 .0 2 5 .3 4 7 .2 7 5 .6

M a x im u m Flo w R a te

M o d e l H z

V a r ia b le Flo w S ys te m O n ly M in im u m Flo w R a te

Fix e d Flo w S ys te m O n ly M in im u m Flo w R a te N o m in a l Flo w R a te

68 IOM 1202

Pressure Drop Data

Figure 42: Evaporator Pressure Drop: AWS models 200/225 Standard Efficiency and 230/250 High Efficiency

200 STD225 STD

230 High

250 High

0

10

20

30

0 100 200 300 400 500 600 700 800

PD(ft)

Flow Rate (gpm)


GPM DP ft. l/sDP

k pa GPM DP ft. l/sDP



k pa

200 ST D 60 139.9 1.4 8.8 4.2 260.1 4.2 16.4 12.6 468.2 12.0 29.5 35.9 748.0 27.5 47.2 82.2

225 ST D 60 155.2 1.7 9.8 5.0 288.4 5.1 18.2 15.2 519.1 14.4 32.8 43.0 748.0 27.5 47.2 82.2

230 Hig h 60 161.5 1.7 10.2 5.0 300.3 5.5 18.9 16.4 540.5 15.5 34.1 46.3 748.0 27.5 47.2 82.2

250 Hig h 60 172.9 2.0 10.9 5.8 320.8 6.1 20.2 18.2 577.4 17.4 36.4 52.0 748.0 27.5 47.2 82.2

M a x im um Flow Ra teNom ina l Flow Ra te

M ode l Hz

Va ria ble Flow Sys te m Only M inim um Flow Ra te

Fix e d Flow Sys te m Only M inim um Flow Ra te


260 STD

260 STD

250 STD

250 STD

0

10

20

30

40

0 200 400 600 800 1000 1200

PD(ft)

Flow Rate (gpm)


G P M D P f t . l/sD P

k p a G P M D P f t . l/sD P



k p a

2 5 0 S T D 6 0 1 6 9 .2 1 .3 1 0 .7 3 .8 3 1 4 .4 4 .3 1 9 .8 1 2 .9 5 6 5 .9 1 2 .1 3 5 .7 0 3 3 6 .2 9 4 3 .2 3 0 5 9 .5 8 9 .7

2 6 0 S T D 6 0 1 7 9 .8 1 .5 1 1 .3 4 .5 3 3 4 .0 4 .8 2 1 .1 1 4 .3 6 0 1 .2 1 3 .5 3 7 .9 3 4 0 .4 1 0 0 2 3 3 .4 6 3 .2 9 9 .8


M o d e l H z



IOM 1202 69

Pressure Drop Data

Figure 44: Evaporator Pressure Drop: AWS models 280/300 High Efficiency

280 High300 High

0

10

20

30

0 100 200 300 400 500 600 700 800 900 1000

PD(ft)

Flow Rate (gpm)


G P M D P f t . l/sD P




k p a

2 8 0 H ig h 6 0 1 9 5 .1 1 .9 1 2 .3 5 .6 3 6 2 .5 5 .9 2 2 .9 1 7 .6 6 5 2 .6 1 6 .6 4 1 .2 4 9 .6 8 7 6 .4 2 8 .0 5 5 .3 8 3 .7

3 0 0 H ig h 6 0 2 0 7 .2 2 .2 1 3 .1 6 .4 3 8 4 .9 6 .5 2 4 .3 1 9 .4 6 9 2 .9 1 8 .5 4 3 .7 5 5 .3 8 7 6 .4 2 8 .0 5 5 .3 8 3 .7

M a x im u m Flo w R a t eN o m in a l Flo w R a t e

M o d e l H z

V a r ia b le Flo w S y s t e m O n ly M in im u m Flo w R a te

Fix e d Flo w S y s te m O n ly M in im u m Flo w R a t e


290 STD

290 STD

310 STD

310 STD

0

10

20

30

0 200 400 600 800 1000 1200 1400

PD(ft)

Flow Rate (gpm)






k p a

2 9 0 S T D 6 0 2 0 2 .8 1 .0 1 2 .8 3 .1 3 7 7 .2 3 .6 2 3 .8 1 0 .8 6 7 9 .0 1 0 .3 4 2 .8 3 0 .8 1 1 3 1 .6 2 5 .5 7 1 .4 7 6 .2

3 1 0 S T D 6 0 2 1 5 .6 1 .3 1 3 .6 3 .8 4 0 0 .5 4 .0 2 5 .3 1 2 .0 7 2 1 .0 1 1 .5 4 5 .5 3 4 .4 1 1 7 1 .1 2 7 .0 7 3 .9 8 0 .7


M o d e l H z



70 IOM 1202

Pressure Drop Data

Figure 46: Evaporator Pressure Drop: AWS models 350/375 Standard Efficiency and 330/350/390/410 High Efficiency

330 High350 STD

350 High375 STD

390 High410 High

0

10

20

30

40

0 200 400 600 800 1000 1200 1400

PD(ft)

Flow Rate (gpm)


GPM DP ft. l/sDP kpa GPM DP ft. l/s

DP kpa GPM DP ft. l/s


DP kpa

350 STD 60 234.9 1.5 14.8 4.6 454.4 5.7 28.7 17.0 817.4 16.2 51.6 48.4 1171.1 30.5 73.9 91.2

375 STD 60 244.5 1.8 15.4 5.4 481.9 6.3 30.4 18.8 867.4 18.0 54.7 53.8 1171.1 30.5 73.9 91.2

330 High 60 249.8 1.8 15.8 5.4 436.4 5.3 27.5 15.8 785.5 15.1 49.6 45.1 1171.1 30.5 73.9 91.2

350 High 60 259.3 2.0 16.4 6.1 464.1 5.9 29.3 17.6 835.4 16.8 52.7 50.2 1171.1 30.5 73.9 91.2

390 High 60 271.8 2.0 17.1 6.1 504.9 6.9 31.9 20.6 908.9 19.5 57.3 58.3 1171.1 30.5 73.9 91.2

410 High 60 293.9 2.6 18.5 7.6 546.4 7.9 34.5 23.6 983.5 22.4 62.0 67.0 1171.1 30.5 73.9 91.2

Maxim um Flow RateNom inal Flow Rate

Model Hz

Variable Flow System Only Minim um Flow Rate

Fixed Flow System Only Minim um Flow Rate

IOM 1202 71

Pressure Drop Data

Figure 47: Evaporator Pressure Drop: AWS models 240/265 Premium Efficiency

240 Prem

240 Prem

265 Prem

265 Prem

0

10

20

30

40

50

60

0 200 400 600 800 1000 1200

PD(ft)

Flow Rate (gpm)


GPM DP ft. l/s kpa GPM DP ft. l/s kpa GPM DP ft. l/s kpa GPM DP ft. l/s kpa

240 Pre m 60 167.2 2.0 10.5 5.9 310.4 6.7 19.6 20.0 558.7 18.9 35.2 56.5 931.2 46.8 58.7 139.9

265 Pre m 60 183.9 2.5 11.6 7.6 341.9 7.9 21.6 23.6 615.4 22.5 38.8 67.3 1025.6 55.5 64.7 165.9

Maxim um Flow Rate

Model Hz

Variable Flow System Only Minim um Flow Rate

Fixed Flow System Only Minim um Flow Rate Nom inal Flow Rate

Figure 48: Evap. Pressure Drop: AWS models 400/425/450 Standard Efficiency & 450 High Efficiency

400 STD425 STD

450 STD

450 High

0

10

20

30

0 200 400 600 800 1000 1200 1400

PD(ft)

Flow Rate (gpm)


GPM DP ft. l/sDP


kpa GPM DP ft. l/sDP

kpa GPM DP ft. l/sDP

k pa

400 ST D 60 286.0 1.9 18.0 5.6 478.0 4.6 30.2 13.7 955.9 15.8 60.3 47.2 1329.7 28.3 83.9 84.6

425 ST D 60 300.5 2.1 19.0 6.4 502.4 5.0 31.7 14.9 1004.9 17.2 63.4 51.4 1329.7 28.3 83.9 84.6

450 ST D 60 316.8 2.4 20.0 7.1 529.7 5.5 33.4 16.4 1059.4 18.9 66.8 56.5 1329.7 28.3 83.9 84.6

450 Hig h 60 320.3 2.4 20.2 7.1 535.6 5.7 33.8 17.0 1071.1 19.3 67.6 57.7 1329.7 28.3 83.9 84.6

M ax im um Flow Rate

M ode l Hz

Variable Flow Sys tem Only M inim um Flow Rate

Fixe d Flow Sys tem Only M inim um Flow Rate Nom ina l Flow Rate

72 IOM 1202

Pressure Drop Data

Figure 49: Evaporator Pressure Drop: AWS models 470/500/525/550 Standard Efficiency & 475/500/530 High Efficiency

470 STD475 High

500 STD500 High

525 STD530 High

550 STD

0

10

20

30

0 500 1000 1500 2000

PD(ft)

Flow Rate (gpm)


GPM DP ft. l/sDP kpa GPM DP ft. l/s



DP kpa

470 STD 60 329.6 1.2 20.8 3.6 551.0 3.0 34.8 9.0 1102.1 10.3 69.5 30.8 1775.5 23.9 112.0 71.4

500 STD 60 350.2 1.4 22.1 4.3 586.0 3.4 37.0 10.2 1171.9 11.5 73.9 34.4 1775.5 23.9 112.0 71.4

525 STD 60 371.4 1.4 23.4 4.3 621.2 3.7 39.2 11.1 1242.5 12.7 78.4 38.0 1775.5 23.9 112.0 71.4

550 STD 60 392.9 1.7 24.8 5.0 656.8 4.1 41.4 12.3 1313.5 14.0 82.9 41.8 1775.5 23.9 112.0 71.4

475 High 60 337.5 1.2 21.3 3.6 564.4 3.1 35.6 9.3 1128.7 10.7 71.2 32.0 1775.5 23.9 112.0 71.4

500 High 60 358.6 1.4 22.6 4.3 599.3 3.5 37.8 10.5 1198.6 11.9 75.6 35.6 1775.5 23.9 112.0 71.4

530 High 60 379.1 1.7 23.9 5.0 634.0 3.9 40.0 11.7 1267.9 13.2 80.0 39.5 1775.5 23.9 112.0 71.4

Maximum Flow RateNominal Flow Rate

Model Hz

Variable Flow System Only Minimum Flow Rate

Fixed Flow System Only Minimum Flow Rate

IOM 1202 73

Pressure Drop Data

Figure 50: Evaporator Pressure Drop: AWS models 290/310 Premium Efficiency

310 Prem

290 Prem

0

10

20

30

40

0 200 400 600 800 1000 1200

PD(ft)

Flow Rate (gpm)






k p a

2 9 0 P r e m 6 0 1 9 9 .1 2 .1 1 2 .6 6 .2 3 7 0 .0 6 .0 2 3 .3 1 7 .9 6 6 6 .1 1 6 .9 4 2 .0 5 0 .5 1 0 4 2 .6 3 7 .3 6 5 .8 1 1 1 .5

3 1 0 P r e m 6 0 2 1 8 .2 2 .4 1 3 .8 7 .1 4 0 5 .2 7 .0 2 5 .6 2 0 .9 7 2 9 .4 1 9 .8 4 6 .0 5 9 .2 1 0 4 2 .6 3 7 .3 6 5 .8 1 1 1 .5

M a x im u m Flo w R a teN o m in a l Flo w R a te

M o d e l H z


Fix e d Flo w S ys te m O n ly M in im u m Flo w R a te

Figure 51: Evaporator Pressure Drop: AWS models 330/365/400 Premium Efficiency

330 Prem

330 Prem

365 Prem

365 Prem

400 Prem

0

10

20

30

0 200 400 600 800 1000 1200 1400 1600 1800

PD(ft)

Flow Rate (gpm)


GP M DP ft. l/sDP

k pa GP M DP ft. l/sDP



k pa

330 Pr e m 60 233.2 0 .9 14 .7 2 .8 433 .2 2 .9 27 .3 8 .7 779 .8 8 .2 49 .2 24 .5 1299 .6 20 .2 82 .0 60 .4

365 Pr e m 60 254.8 1 .2 16 .1 3 .5 473 .3 3 .4 29 .9 10 .2 852 .0 9 .6 53 .8 28 .7 1420 .0 23 .6 89 .6 70 .5

400 Pr e m 60 276.8 1 .4 17 .5 4 .2 513 .9 3 .9 32 .4 11 .7 925 .0 11 .1 58 .4 33 .2 1541 .6 27 .3 97 .3 81 .6

M a x im um Flow Ra te

M ode l Hz

V a r ia ble Flow S ys te m O nly M inim um Flow Ra te

Fix e d Flow S ys te m O nly M inim um Flow Ra te Nom ina l Flow Ra te

74 IOM 1202

Introduction
Introduction
This section provides setup, operating, and troubleshooting information for the Daikin Pathfinder chillers.

Software Version:

The unit software and BSP (Board Support Package) versions can be viewed using the keypad/display. From the Main Menu, turn the knob to the right until you reach the About Chiller menu and press Enter (the knob). The software version is displayed as "App Version =". Scroll down in this menu (turn knob to the right), the BSP version will also be displayed ("BSP Version=").

This manual covers software revisions up to App Version 263214200. It must be used with firmware version 9.XX..

! WARNING

! CAUTION

NOTICE

This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with this instruction manual, can cause interference to radio communications. Operation of this equipment in a residential area can cause harmful interference, in which case the user will be required to correct the interference at the user’s own expense. Daikin Applied disclaims any liability resulting from any interference or for the correction thereof.

Operating Limits:

Maximum standby ambient temperature: 130°F (55°C)

Maximum operating inlet fluid temperature: 88°F (31.1°C)

Maximum non-operating inlet fluid temperature: 100°F (38°C)

Controller Features

Readout of the following temperature and pressure readings:Entering and leaving chilled water temperatureSaturated evaporator refrigerant temperature and pressureSaturated condenser temperature and pressureOutside air temperatureSuction and discharge line temperatures − calculated super-heat for discharge and suction linesOil pressure

Automatic control of primary and standby chilled water pumps. The control will start one of the pumps (based on lowest run-hours) when the unit is enabled to run (not necessarily running on a call for cooling) and when the water temperature reaches a point of freeze possibility.

Two levels of security protection against unauthorized changing of setpoints and other control parameters.

Warning and fault diagnostics to inform operators of warning and fault conditions in plain language. All events and alarms are time and date-stamped for identification of when the fault condition occurred.

Twenty-five previous alarms are available.

Remote input signals for chilled water reset, demand limiting, and unit enable.

Test mode allows the service technician to manually control the controllers’ outputs and can be useful for system checkout.

Building Automation System (BAS) communication capability via LonTalk®, Modbus®, or BACnet® standard protocols for all BAS manufacturers-simplified with Daikin’s Open Choices™ feature.

Pressure transducers for direct reading of system pressures. Preemptive control of low evaporator pressure conditions and high discharge temperature and pressure to take corrective action prior to a fault trip.

Electric shock hazard: can cause personal injury or equipment damage. This equipment must be properly grounded. Connections to, and service of, the MicroTech III control panel must be performed only by personnel who are knowledgeable in the operation of this equipment .

Static sensitive components. A static discharge while handling electronic circuit boards can cause damage to the components. Discharge any static electrical charge by touching the bare metal inside the control panel before performing any service work. Never unplug any cables, circuit board terminal blocks, or power plugs while power is applied to the panel.

IOM 1202 75

General Description
General Description
The MicroTech III control system consists of a microprocessor-based controller and a number of extension modules, which vary depending on the unit size and conformation. The control system provides the monitoring and control functions required for the controlled, efficient operation of the chiller.

The control panel is located on the front of the unit at the compressor end. There are three doors. The control panel is behind to left-hand door. The power panel is behind the middle and right-hand doors.

The operator can monitor all critical operating conditions by using the screen located on the main controller. In addition to providing all normal operating controls, the MicroTech III control system will take corrective action if the chiller is operating outside of its normal design conditions. If a fault condition develops, the controller will shut a compressor, or the entire unit, down and activate an alarm output.

The system is password protected and only allows access by authorized personnel. Except that some basic information is viewable and alarms can be cleared without a password. No settings can be changed.

Additional information about the Daikin Pathfinder Chiller is available in Catalog 623, which can be found on www.DaikinApplied.com.

Emergency Switch Relay

Controller Fuse

NOTES:

The Emergency Switch Relay de-energizes all circuit’s control power when activated, causing an immediate compressor and fan shutdown. The red emergency button switch is located on the front of the control panel door.

The control power transformer is located in the power panel adjacent to the control panel.

Additional extension (aka expansion) modules are located elsewhere on the chiller.

See the VFD section for a description of the panel used with the VFD option as it is considerably different from the standard panel.

Figure 52: Control Panel Components, Three-Circuit Unit, w/o VFD

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General Description

Power Panel Layout

The power panel is at the front of the unit, behind the two doors to the right.

Figure 53: Power Panel, Two-Circuit Units without VFD, Left Side

Fan Contactors, 1 per Fan Circuit #1

Cir# 1, Fan Circuit Breaker

Fan Contactors 1 per Fan, Circuit #2

Phase/Voltage Monitor

120/24VTransformer

Line/120V Transformer

Figure 54: Power Panel, Two-Circuit Units without VFD, Right Sideg , , gSingle Point Disconnect Switch

Compressor #1 Circuit Breaker

Compressor #2 Circuit Breaker

NOTE: See the VFD section of this manual for a description of the power used with the VFD option as it is considerably different from the standard panel.

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General Description

Economizer Components

The chiller may or may not have economizers depending on design capacity requirements. An economizer is a well-proven

device to increase a refrigerant circuit’s capacity and efficiency.

Figure 55: Economizer Components

Warm liquid from the condenser is fed into the economizer where it is cooled by flashing off liquid also from the condenser. The flash gas is piped to a compressor interstage

point. Lowering the liquid refrigerant temperature to the evaporator decreases its enthalpy (heat content) and results in a greater amount of heat absorption from the chilled water.

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General Description

Figure 56: Piping Schematic with Economizer Circuit, One Circuit Shown

Figure 57: Figure 5, Piping Schematic without Economizer Circuit, One Circuit Shown

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Controller Description
Hardware Structure

The MicroTech III control system for Pathfinder chillers consists of a main unit controller with a number of extension input/output (I/O) modules attached depending on the chiller size and configuration.

One of the optional BAS communication modules will be included if ordered.

An optional Remote Operator Interface panel may be included, connected with up to nine Pathfinder units.

The MicroTech III controllers used on Pathfinder chillers are not interchangeable with previous MicroTech II controllers.

Figure 58:

Communication

BACnet/IP BACnet/ MSTP

MODbus LON

Remote Operator Interface

MicroTech III unit controller

Extension I/O Modules

Main Unit Controller with Optional Control Options

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System Architecture

The overall controls architecture uses the following:

• One MicroTech III main controller

• I/O extension modules (sometimes referred to as “con-trollers”) as needed depending on the configuration ofthe unit

• Optional BAS interface as selected

Figure 59: System Architecture

I/O ExtensionCompressor 1




I/O ExtensionEXV 1

I/O ExtensionEXV 2

I/O ExtensionEXV 3

I/O ExtensionEXV 4

I/O ExtensionFans Circuit 1

and 2




and 4

I/O ExtensionAlarm/Limiting

BAS Interface(BACnet, Lon,

Modbus)MicroTech III Main Controller

Peripheral Bus

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Sequence of Operation
Figure 60: Unit Sequence of Operation (see Figure 9 for circuit sequence of operation)

Is unit enabled?

Is flow present?

Evaporator pump output on

Wait for chilled water loop to recirculate.

Yes

Yes

No

Unit power up

Unit in Off state

No

The chiller may be disabled via the unit switch , the remote switch, the keypad enable setting , or the BAS network. In addition, the chiller will be disabled if all circuits are disabled , or if there is a unit alarm . If the chiller is disabled, the unit status display will reflect this and also show why it is disabled.

If the unit switch is off, the unit status will be Off:Unit Switch. If the chiller is disabled due to network command , the unit status will be Off:BAS Disable. When the remote switch is open, the unit status will be Off:Remote Switch . When a unit alarm is active, the unit status will be Off:Unit Alarm. In cases where no circuits are enabled , the unit status will be Off :All Cir Disabled. If the unit is disabled via the Chiller Enable set point , the unit status will be Off :Keypad Disable.

If the chiller is enabled , then the unit will be in the Auto state and the evaporator water pump output will be activated .

After establishing flow, the chiller will wait some time to allow the chilled water loop to recirculate for an accurate reading of the leaving water temperature . The unit status during this time is Auto:Evap Recirc.

The chiller will then wait for the flow switch to close, during which time the unit status will be Auto:Wait for flow.

Is low ambient lockout active?

Yes

No

Low ambient lockout will prevent the chiller from starting even if it is otherwise enabled . When this lockout is active, the unit status will be Off:Low OAT Lock .

Is there enough load to start chiller?

No

Keep pump output on while chiller is enabled and either

running or ready to run.

The chiller is now ready to start if enough load is present . If the LWT is not higher than the Active Setpoint plus the Start Up Delta T, the unit status will be Auto:Wait for load.

If the LWT is higher than the Active Setpoint plus the Start Up Delta T, the unit status will be Auto. A circuit can start at this time.

Yes

AWS Chiller Sequence of Operation in Cool Mode

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Start first circuit.

Yes

The first circuit to start is generally the available circuit with the least number of starts. This circuit will go through its start sequence at this point .

Is more capacity needed to satisfy load?

Has the stage up time delay expired?

Yes

No

Load/unload as needed to satisfy load.

No

The first circuit will be loaded and unloaded as needed in an attempt to satisfy the load by controlling LWT to the Active Setpoint .

A minimum time must pass between the starting of circuits . The time remaining can be viewed on the HMI if the minimum password level is active.

If a single circuit is not enough to satisfy the load, additional circuits will need to be started. An additional circuit will be started when all running compressors are loaded to a specific capacity and the LWT is higher than the Active Setpoint plus the Stage Up Delta T.

Start next circuit.

Yes The second circuit will go through its start sequence at this point .

Note that a third circuit can be started if available . The two preceding conditions must again be satisfied after starting the second circuit before starting the third circuit.


Can less circuits handle the load?

NoAs the load drops off , the circuits will unload accordingly . If the LWT drops below the Active Setpoint minus the Stage Down Delta T, one circuit will shut off. If all running circuits are unloaded below a minimum value , this can also result in one circuit shutting off.

A minimum time must pass between the shutting down of circuits . The time remaining can be viewed on the HMI if the minimum password level is active .

All running circuits will now be loaded /unloaded as needed to satisfy the load . When possible , they will load balance so that running circuits are providing nearly equal capacity .

Yes

Shut down one circuit. The next circuit to shut off is generally the one with the most run hours .

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Is load satisfied ?

No

Shut down last circuit.

Yes

When only one circuit is running , the load may drop off to the point where even minimum unit capacity is too much. The load has been satisfied when the LWT drops below the Active Setpoint minus the Shutdown Delta T . At this time the only running circuit can shut down .

The remaining running circuit (s) will be loaded /unloaded as needed to satisfy the load.

The last circuit running now shuts down .

The unit should be ready to start again when the LWT gets high enough . Until that time, unit status will be Auto:Wait for load.

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Figure 61: Circuit Sequence of Operation

Is circuit commanded to start?

Is circuit commanded to shut down?

Pumpdown circuit

Yes

Yes

No

Unit power up

Circuit is in Off state

No

Run circuit

When the circuit begins to run , the compressor will be started and the EXV , fans, and other devices will be controlled as needed . The normal circuit status at this time will be Run.

When the circuit is commanded to shut down , a normal shut down of the circuit will be performed . The circuit status during this time will be Run:Pumpdown. After the shut down is completed , the circuit status will normally be Off:Cycle Timer initially.

When the circuit is in the Off state the EXV is closed, compressor is off , and all fans are off .

Is circuit is enabled to start?

Yes

No The circuit must be enabled before it can run . It may be disabled for several reasons . When the circuit switch is off, the status will be Off:Circuit Switch.If the BAS has disabled the circuit , the status will be Off:BAS Disable. If the circuit has an active stop alarm then the status will be Off :Cir Alarm. If the circuit has been disabled via the circuit mode set point , the status will be Off:Cir Mode Disable.

Is compressor oil sump ready?

Yes

No

If the compressor is not ready due to refrigerant in the oil , the circuit cannot start. The circuit status will be Off :Refr In Oil.

Circuit is ready to start If the compressor is ready to start when needed , the circuit status will be Off:Ready.

Are compressor cycle timers active?

No

Yes

A minimum time must pass between the previous start and stop of a compressor and the next start . If this time has not passed, a cycle timer will be active and the circuit status will be Off:Cycle Timer.

AWS Sequence of Operation - Circuits

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Controller Operation
MicroTech III Inputs/Outputs

I/O for the unit control and for circuits one and two are found on CP1.

The chiller may be equipped with two or three compressors.

Table 48: Analog Inputs - Evaporator

*Evaporator #1 LWT and Evaporator #2 LWT will only be used when unit is configured with four circuits

Table 49: Analog Outputs - Fan VFD

Table 50: Digital Inputs

Table 51: Digital Outputs

# Description Signal Source Expected Range

AI1 Evaporator Entering Water TempNTC Thermister (10K@25°C)

-50°C – 120°C

AI2 Evaporator Leaving Water TempNTC Thermister (10K@25°C)

-50°C – 120°C

AI3Evaporator #1 Leaving Water Temp (*)

NTC Thermister (10K@25°C)

-50°C – 120°C

X1Evaporator #2 Leaving Water Temp (*)

NTC Thermister (10K@25°C)

-50°C – 120°C

X2 Outside Ambient TemperatureNTC Thermister (10K@25°C)

-50°C – 120°C

X4 LWT Reset 4-20 mA Current 1 to 23 mA

# Description Output Signal RangeX5 Fan VFD #1 0-10VDC 0 to 100% (1000 steps resolution)X6 Fan VFD #2 0-10VDC 0 to 100% (1000 steps resolution)X7 Fan VFD #3 0-10VDC 0 to 100% (1000 steps resolution)X8 Fan VFD #4 0-10VDC 0 to 100% (1000 steps resolution)

# Description Signal Off Signal OnDI1 Unit PVM Fault No FaultDI2 Evaporator Flow Switch No Flow FlowDI3 Double Setpoint/ Mode Switch Cool mode Ice modeDI4 Remote Switch Remote off Remote onDI5 Unit Switch Unit off Unit onDI6 Emergency Stop Unit off/rapid stop Unit on

# Description Output OFF Output ONDO1 Evaporator Water Pump Pump Off Pump On

DO2 Unit Alarm Alarm not Active Alarm Active (Flashing= circuit alarm)

DO3 Circuit #1 Fan Step #1 Fan Off Fan OnDO4 Circuit #1 Fan Step #2 Fan Off Fan OnDO5 Circuit #1 Fan Step #3 Fan Off Fan OnDO6 Circuit #1 Fan Step #4 Fan Off Fan OnDO7 Circuit #2 Fan Step #1 Fan Off Fan OnDO8 Circuit #2 Fan Step #2 Fan Off Fan OnDO9 Circuit #2 Fan Step #3 Fan Off Fan OnDO10 Circuit #2 Fan Step #4 Fan Off Fan On

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Expansion I/O Compressor #1 to #3

Table 52: Analog Inputs

Note: European chillers will have the PTC thermistor in the compressor motor connected to this input. X7 is configured as an NTC 10k input for European chillers.

Table 53: Analog Outputs


Note: US chillers will use the motor protection board connected to this input. X7 is configured as a digital input for US chillers.

Table 55: Digital Outputs - Europe Configuration

Table 56: Digital Outputs - U.S. Configuration

# Description Signal Source Expected RangeX1 Discharge Temperature NTC Thermister -50°C – 125°CX2 Evaporator Pressure Ratiometric 0.5-4.5 Vdc -100 kPa to 700 kPaX3 Oil Pressure Ratiometric 0.5-4.5 Vdc 0 kPa to 3000 kPaX4 Condenser Pressure Ratiometric 0.5-4.5 Vdc 0 kPa to 3000 kPaX7 Motor Temperature See note below

# Description Output Signal RangeNot Needed

# Description Signal Off Signal OnX6 Starter Fault Fault No faultX7 Motor Protection See note belowDI1 High Pressure Switch Fault No fault

# Description Output Off Output OnDO1 Start Compressor Compressor Off Compressor OnDO2 Economizer Solenoid Closed Solenoid OpenDO3 Non-modulating Slide Load/

UnloadSolenoid Closed Solenoid Open

DO4 Liquid Injection Solenoid Closed Solenoid OpenDO5 Modulating Slide Load Solenoid Closed Solenoid OpenDO6 Modulating Slide Unload Solenoid Closed Solenoid OpenX5 Modulating Slide “turbo” Solenoid Closed Solenoid Open

# Description Output Off Output OnDO1 Start Compressor Compressor Off Compressor OnDO2 Economizer Solenoid Closed Solenoid OpenDO3 Non-modulating Slide Load Solenoid Closed Solenoid OpenDO4 Non-modulating Slide Unload Solenoid Closed Solenoid OpenDO5 Modulating Slide Load Solenoid Closed Solenoid OpenDO6 Modulating Slide Unload Solenoid Closed Solenoid OpenX5 Modulating Slide ‘Turbo’ Solenoid Closed Solenoid OpenX8 Liquid Injection Solenoid Closed Solenoid Open

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I/O EXV Circuit #1 to #3





Table 61: Stepper Motor Output

Extension I/O Fan Module Circuit #1 & 2



Extension I/O Fan Module Circuit #3


# Description Signal Source Expected Range

X2 Suction TemperatureNTC Thermister 10K@25°C)

-50°C – 120°C

X3 Slide Position LVDT 4 to 20 mA 0% to 100%


# Description Signal Off Signal OnDI1 Low Pressure switch Fault No fault

# Description Output Off Output OnDO1 Liquid Line Solenoid Closed Solenoid Open

# DescriptionM1+

EXV Stepper Coil 1M1-M2+

EXV Stepper Coil 2M2-

# Description Output Off Output OnDI1 PVM/GFP Circuit #1 Fault No faultDI2 PVM/GFP Circuit #2 Fault No fault

# Description Output Off Output OnDO1 Circuit #1 Fan Step #5 Fan Off Fan OnDO2 Circuit #1 Fan Step #6 Fan Off Fan OnDO3 Circuit #2 Fan Step #5 Fan Off Fan OnDO4 Circuit #2 Fan Step #6 Fan Off Fan On

# Description Output Off Output OnDO1 Circuit #3 Fan Step #5 Fan Off Fan OnDO2 Circuit #3 Fan Step #6 Fan Off Fan On

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Extension I/O Unit Alarm & Limiting





# Description Signal Source RangeX3 Demand Limit 4-20 mA 1 to 23 mAX4 Unit Current 4-20 mA 1 to 23 mA


# Description Signal Off Signal On

X1 External Alarm/EventExternal Device Failure

External Device OK

X2 Current Limit Enable No Limiting LimitingX5 Circuit Switch #1 Circuit Off Circuit OnX6 Circuit Switch #2 Circuit Off Circuit OnX7 Circuit Switch #3 Circuit Off Circuit On

# Description Output Off Output OnDO1 Evaporator Water Pump #2 Pump Off Pump OnDO2 OpenDO3 Circuit #1 Alarm No Alarm AlarmDO4 Circuit #2 Alarm No Alarm AlarmDO5 Circuit #3 Alarm No Alarm Alarm

IOM 1202 89


Setpoints

The following parameters are remembered during power off, are factory set to the Default value, and can be adjusted to any value in the Range column.

Read and write access to these setpoint is determined by the Global HMI (Human Machine Interface) Standard Specification.

Table 69: Setpoint Default and Range

Description Default RangeUnitManufacturing Location Not Selected Not Selected, Europe, USA

Frequency 60 Hz 50, 60

Voltage 460 V 230, 380, 400, 460, 575

Unit Enable Enable Disable, Enable

Unit Status after Power Failure Enable Disable, EnableControl source Local Local, Network

Available Modes CoolCool, Cool w/Glycol Cool/Ice w/Glycol, Ice, Test

Cool LWT 1 7.0°C (44.6°F) 4.0°C to 15.0°C (39.2°F to 59.0°F)Cool LWT 2 7.0°C (44.6°F) 4.0°C to 15.0°C (39.2°F to 59.0°F)Cool LWT 1 with Glycol 7.0°C (44.6°F) -4.0°C to 15.0°C (24.8°F to 59.0°F) Cool LWT 2 with Glycol 7.0°C (44.6°F) -4.0°C to 15.0°C (24.8°F to 59.0°F)Ice LWT -4.0°C (24.8°F) -8.0°C to 4.0°C (17.6°F to 39.2°F)Startup Delta T 2.7 deg C (4.9 deg F) 0 to 5.0 deg C (0 to 9.0 deg F)Shut Down Delta T 1.5 deg C (2.7 deg F) 0 to 1.7 deg C (0 to 3.1 deg F)Stage Up Delta T 0.5 deg C (0.9 deg F) 0 to 1.7 deg C (0 to 3.1 deg F)Stage Down Delta T 0.7 deg C (1.3 deg F) 0 to 1.7 deg C (0 to 3.1 deg F)Max Pulldown 1.7 deg C/min (3.1 deg F/min) 0.3 to 2.7 deg C/min (0.5 to 4.9 deg F/min)Nominal Evap Delta T 2 Cir 5.6 deg C (10.1 deg F) 3.3 to 8.9 deg C (5.9 to 16.0 deg F) Nominal Evap Delta T 3 Cir 5.6 deg C (10.1 deg F) 3.3 to 10 deg C (5.9 to 18.0 deg F) Variable Evap Flow No No, YesEvap Recirc Timer 30 sec 0 to 300 seconds

Pump Control #1 Only#1Only, #2 Only, Auto, #1 Primary, #2 Primary

LWT Reset Type None None, 4-20mA, OATMax Reset 5.0 deg C (9.0 deg F) 0 to 10.0 deg C (0 to 18.0 deg F)Start Reset Delta T 5.0 deg C (9.0 deg F) 0 to 10.0 deg C (0 to 18.0 deg F)Max Reset OAT 15.5°C (59.9°F) 10.0°C to 30.0°C (50°F to 86.0 °F)Start Reset OAT 23.8°C (74.8°F) 10.0°C to 30.0°C (50°F to 86.0 °F)Soft Load Off Off, OnBegin Capacity Limit 40% 20-100%Soft Load Ramp 20 min 1-60 minutesDemand Limit Off Off, OnCurrent @ 20mA 800 A 0 to 2000 ACurrent limit Setpoint 800 A 0 to 2000 A# of Circuits 2 2, 3Ice Delay Timer 12 hrs 1-23 hoursClear Ice Timer No No, YesPVM Multi Point Single Point, Multi Point , None(SSS)Noise Reduction Disabled Disabled, EnabledNoise Reduction Start Time 21:00 18:00 – 23:59Noise Reduction End Time 6:00 5:00 – 9:59Noise Reduction Offset 5.0 deg C (9.0 deg F) 0 to 14.0 deg C (0 to 25.2 deg F)Evap LWT Sensor Offset 0 deg C (0 deg F) -5.0 to 5.0 deg C (-9.0 to 9.0 deg F)Evap EWT Sensor Offset 0 deg C (0 deg F) -5.0 to 5.0 deg C (-9.0 to 9.0 deg F)

90 IOM 1202


Description Default Range

Continued from previous page.

OAT Sensor Offset 0 deg C (0 deg F) -5.0 to 5.0 deg C (-9.0 to 9.0 deg F)Max Power Failure time 15 sec 15-180 secRapidRestore™ Disable Enable, Disable (special software req’d)Compressors-GlobalStart-start timer 20 min 15-60 minutesStop-start timer 5 min 3-20 minutesPumpdown Pressure 100 kPa (14.5 psi) 70 to 280 kPa (10.2 to 40.6 psi)Pumpdown Time Limit 120 sec 0 to 180 secLight Load Stage Down 40% 26 to 50%High Load Stage Up 80% 50 to 100%Stage Up Time 5 min 0 to 60 minStage Down Time 3 min 3 to 30 minStage Delay Clear No No, YesSoft Load Off Off, OnMax # Comps Running 2 2,3 Sequence # Cir 1 1 1-3Sequence # Cir 2 1 1-3Sequence # Cir 3 1 1-3Liquid Injection Activation 85.0°C (185.0°F) 80.0°C to 100.0°C (176.0°C to 212.0°F)Liq. Line Solenoid Valves No No, YesSlide Position Sensors Yes No, YesLow Pressure-Unload 160 kPa (23 psi) 160 kPa to 310 kPa (23 psi to 48 psi)Low Pressure-Hold 180 kPa (26 psi) 180 kPa to 310 kPa (26 psi to 48 psi)Low Press-Unload w/ Glycol 160 kPa (23 psi) 0 kPa to 310 kPa (0 psi to 48 psi)Low Press-Hold w/Glycol 180 kPa (26 psi) 0 kPa to 310 kPa (0 psi to 48 psi)High Oil Press Diff Delay 30 sec 10-180 secHigh Oil Press Differential 250 kPa (36 psi) 0 to 415 kPa (0 to 60 psi)Alarm LimitsHigh Discharge Temperature 110.0°C (230.0°F) 65.0 to 110.0 °C (149.0 to 230.0°F)Low discharge superheat 12°C (21.6°F) 10.0-15.0°C (18-27°F)High Cond Pressure Delay 5 sec 0 to 30 secLow Pressure Ratio Delay 90 sec 0 to 180 secStart Time Limit 60 sec 20 to 180 secEvap. Water Freeze 2.2°C (36.0°F) 1.1°C to 6.0°C (34.0°F to 42.8°F)Evap. Water Freeze w/ Glycol 2.2°C (36.0°F) -18.0°C to 6.0°C (-0.4°F to 42.8°F)Evaporator Flow Proof 15 sec 5 to 15 secRecirculate Timeout 3 min 1 to 10 minLow OAT Lockout 12.0°C (53.6°F) 2.0°C to 15.0°C (35.6°F to 59.0°F)Low OAT Lockout/with Fan VFD 12.0°C (53.6°F) -23.0°C to 15.0°C (-9.4°F to 59.0°F)

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The following setpoints exist individually for each circuit:

Description Default RangeCircuit mode Enable Disable, enable, test

Compressor Size for Non-VFD HSA204HSA192, HSA204, HSA215 HSA232, HSA241, HSA263

Compressor Size for VFD HSV204 HSV204, HSV215 HSV232, HSV241, HSV263

Economizer (VFD Only) With With, WithoutCapacity Control Auto Auto, ManualManual Capacity See Note 1 0 to 100%Clear Cycle Timers No No, YesEXV control Auto Auto, manualService Pumpdown No No, YesEconomizer Enable Capacity (VFD Model Only)

40% 40 to 75%

Evap pressure Sensor offset 0 kPa (0 psi) -100 to 100 kPa (-14.5 to 14.5 psi)Cond pressure Sensor offset 0 kPa (0 psi) -100 to 100 kPa (-14.5 to 14.5 psi)Oil pressure Sensor Offset 0 kPa (0 psi) -100 to 100 kPa (-14.5 to 14.5 psi)Suction temp Sensor Offset 0 deg C (0 deg F) -5.0 to 5.0 deg C (-9.0 to 9.0 deg F)Discharge temp offset 0 deg C (0 deg F) -5.0 to 5.0 deg C (-9.0 to 9.0 deg F)Slide sensor mA @ minimum 4 mA 4 to 22 mASlide sensor mA @ maximum 20 mA 4 to 22 mAFansFan VFD enable Enable Disable, EnableNumber of fans 5 5 to 12Saturated Condenser Temp Target Min 32.0°C (89.6°F) 20.0°C to 50.0°C (68.0°F to 122.0°F)Saturated Condenser Temp Target Max 43.0°C (109.4°F) 32.0°C to 50.0°C (89.6°F to 122.0°F)Fan Stage 0 Up Deadband 2.5 deg C (4.5 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 1 Up Deadband 2.5 deg C (4.5 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 2 Up Deadband 4.0 deg C (7.2 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 3 Up Deadband 5.0 deg C (9.0 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 4 Up Deadband 4.0 deg C (7.2 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 5 to 12 Up Deadband 4.0 deg C (7.2 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 1 Down Deadband 10.0 deg C (18.0 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 2 Down Deadband 4.0 deg C (7.2 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 3 Down Deadband 3.5 deg C (6.3 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 4 Down Deadband 3.0 deg C (5.4 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 5 Down Deadband 2.5 deg C (4.5 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan Stage 6 to 12Down Deadband 2.5 deg C (4.5 deg F) 1.0 to 10.0 deg C (1.8 to 18 deg F)Fan VFD Max Speed 100% 90 to 110%Fan VFD Min Speed 25% 20 to 60%

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Dynamic Default Values

The fan staging dead bands have different default values based on the VFD enable setpoint. When the VFD enable setpoint is

changed, a set of default values for the fan staging dead bands is loaded as follows:

The low pressure settings have different default values based on the Manufacturing Location setpoint. When the

manufacturing location is configured, the default values for these setting are loaded as shown below:

Fan VFD is Enabled Fan VFD is Disabled

SetpointDefault loaded (oF)

SetpointDefault loaded (oF)

Stage 0 On Deadband 4.5 Stage 0 On Deadband 7.2Stage 1 On Deadband 4.5 Stage 1 On Deadband 9.0Stage 2 On Deadband 7.2 Stage 2 On Deadband 9.9Stage 3 On Deadband 9.0 Stage 3 On Deadband 10.8Stage 4 On Deadband 7.2 Stage 4 On Deadband 11.7Stage 5 On Deadband 7.2 Stage 5 On Deadband 11.7

Stage 2 Off Deadband 7.2 Stage 2 Off Deadband 18Stage 3 Off Deadband 6.3 Stage 3 Off Deadband 14.4Stage 4 Off Deadband 5.4 Stage 4 Off Deadband 9.9Stage 5 Off Deadband 4.5 Stage 5 Off Deadband 7.2Stage 6 Off Deadband 4.5 Stage 6 Off Deadband 7.2

US Chiller European ChillerSetpoint Default loaded Setpoint Default loadedLow Evap Press.Unload 160 kPa (23.2 psi) Low Evap Press. Unload 160 kPa (23.2 psi)Low Evap Press.-Hold 180 kPa (26.1 psi) Low Evap Pressure-Hold 180 kPa (26.1 psi)

IOM 1202 93

Unit Functions
Unit Functions
Calculations

EWT Slope

EWT slope is calculated such that the slope represents the change in EWT over a time frame of one minute.

Pulldown Rate

The slope value calculated above will be a negative value as the water temperature is dropping. A pulldown rate is calculated by inverting the slope value and limiting to a minimum value of 0°C/min. The Unit Status will so indicate when the compressor capacity is limited by excessive pulldown.

Unit Availability

The unit is available to start if the following conditions are true:

• Unit switch is closed

• If unit mode is ice and the ice timer has timed out.

• No unit alarms exist

• Emergency stop input is closed

• At least one circuit is enabled

• Unit enable setpoint is Enable

• If remote control is connected and remote unit switch is closed

• If Control Source = Network, BAS Enable = True

Enabling and disabling the chiller is accomplished using setpoints and inputs to the chiller. The unit switch, remote switch input, and Unit Enable Setpoint all are required to be on for the unit to be enabled when the control source is set to local. The same is true if the control source is set to network, with the additional requirement that the BAS request must be on.

Unit is enabled according to the following table. NOTE: An x indicates that the value is ignored.

Table 70: Enable Combinations

All of the methods for disabling the chiller, discussed in this section, will cause a normal shutdown (pumpdown) of any running circuits.

When the controller is powered up, the Unit Enable Setpoint will be initialized to ‘Disable’ if the Unit Enable Init Setpoint is set to ‘Disable’.

Unit Mode Selection

The operating mode of the unit is determined by setpoints and inputs to the chiller. The Available Modes Setpoint determines what modes of operation can be used. This setpoint also determines whether the unit is configured for glycol use. The Control Source Setpoint determines where a command to change modes will come from. A digital input switches between cool mode and ice mode if they are available and the control source is set to local. The BAS mode request switches between cool mode and ice mode if they are both available and the control source is set to network.

The Available Modes Setpoint must only be changed when the unit switch is off. This is to avoid changing modes of operation inadvertently while the chiller is running.

Unit Mode is set according to the following table.

Table 71: Mode Combinations

Notes

16 “x” Indicates that the value is ignored.

17 If the Available Modes Setpoint is set to an option ‘w/Glycol’, then glycol operation should be enabled for the unit. Glycol operation should only be disabled when the Available Modes Setpoint is set to ‘Cool’.

Glycol Configuration

If the Available Modes Setpoint is set to an option w/Glycol, then glycol operation is enabled for the unit. Glycol operation must be disabled only when the Available Modes Setpoint is set to Cool.

UnitSwitch

Control Source Setpoint

Remote Switch Input

Unit Enable Setpoint

BAS Request

Unit Enable

Off x x x x Offx x Off x x Offx x x Off x OffOn Local On On x Onx Network x x Off OffOn Network On On On On


Mode Input

BAS Request

Available Modes Setpoint

Unit Mode

x x x Cool Cool

x x xCool w/Glycol

Cool

Local Off xCool/Ice w/Glycol

Cool

Local On xCool/Ice w/Glycol

Ice

Network x CoolCool/Ice w/Glycol

Cool

Network x IceCool/Ice w/Glycol

Ice

x x xIce w/Glycol

Ice

x x x Test Test

94 IOM 1202

Unit Functions

Unit Control States

The unit will always be in one of three states:

• Off – Unit is not enabled to run.

• Auto – Unit is enabled to run.

• Pumpdown – Unit is doing a normal shutdown.

Off. The unit should be in the Off state if any of the following are true:

• A unit alarm is active

• All circuits are unavailable to start (cannot start even after cycle timers have expired)

• The unit mode is ice, all circuits are off, and the ice mode delay is active

• Manufacturing Location is not set

• Either manufacturing location or number of circuits have been changed and controller has not been rebooted

Auto. The unit should be in the Auto state if all of the following are true:

• Manufacturing location is set and controller has been rebooted

• Unit enabled based on settings and switches

• If unit mode is ice, the ice timer has expired

• No unit alarms are active

• At least one circuit is enabled and available to start

Pumpdown. The unit should be in Pumpdown until all running compressors finish pumping down if any of the following are true:

• Unit is disabled via settings and/or inputs in section Unit Availability.

• Unit pumpdown alarm is triggered

Table 72: Unit Status

Enum Status Conditions0 Auto Unit State = Auto1 Off: Ice Mode Tmr Unit State = Off, Unit Mode = Ice, and Ice Delay = Active2 Off: OAT Lockout Unit State = Off and Low OAT Lockout is active3 Off: All Cir Disabled Unit State = Off and all compressors unavailable4 Off: Unit Alarm Unit State = Off and Unit Alarm active5 Off: Keypad Disable Unit State = Off and Unit Enable Setpoint = Disable6 Off: Remote Sw Unit State = Off and Remote Switch is open7 Off: BAS Disable Unit State = Off, Control Source = Network, and BAS Enable = false8 Off: Unit Sw Unit State = Off and Unit Switch = Disable9 Off: Test Mode Unit State = Off and Unit Mode = Test10 Auto: Noise Reduction Unit State = Auto and Noise Reduction is active

11 Auto: Wait for LoadUnit State = Auto, no circuits running, and LWT is less than the active setpoint + startup delta

12 Auto: Evap Recirc Unit State = Auto and Evaporator State = Start13 Auto: Wait for flow Unit State = Auto, Evaporator State = Start, and Flow Switch is open14 Auto: Pumpdn Unit State = Pumpdown15 Auto: Max Pulldn Unit State = Auto, max pulldown rate has been met or exceeded16 Auto: Unit Cap Limit Unit State = Auto, unit capacity limit has been met or exceeded17 Auto: Current Limit Unit State = Auto, unit current limit has been met or exceeded

18 Off. Cfg Chg, Rst CtlrUnit configuration setpoint has changed, and reboot of controller is required

19 Off Mfg Loc Not Set Mfg Location is not set

IOM 1202 95

Unit Functions

Ice Mode Start Delay

Compressor Staging in Ice Mode

The first compressor will start when evaporator LWT is higher than the target plus the Startup Delta T setpoint.When at least one compressor is running, the other compressors will start only when evaporator LWT is higher than the target plus the Stage Up Delta T setpoint.All compressors will be staged off when evaporator LWT is less than the target.

Stage Up Delay

A fixed stage up delay of one minute between compressor starts is used in this mode. When at least one compressor is running, the other compressors will start as quickly as possible with respect to the stage up delay.

An adjustable start-to-start ice delay timer will limit the frequency with which the chiller may start in Ice mode. The timer starts when the first compressor starts while the unit is in ice mode. While this timer is active, the chiller cannot restart in Ice mode. The time delay is user adjustable.

The ice delay timer may be manually cleared to force a restart in ice mode. A setpoint specifically for clearing the ice mode delay is available. In addition, cycling the power to the controller will clear the ice delay timer.

Evaporator Pump Control

State

Three evaporator pump control states for control of the evaporator pumps:

• Off - No pump on.

• Start – Pump is on, water loop is being recirculated. Recirc timer runnning

• Run – Pump is on, water loop has been recirculated. Recirc timer has timed out

Off. The control state is Off when all of the following are true:

• Unit state is Off

• LWT is higher than the Evap Freeze setpoint or LWT sensor fault is active

• EWT is higher than the Evap Freeze setpoint or EWT sensor fault is active

Start. The control state is Start when any of the following are true:

• The unit state is auto

• LWT is less than the Evap Freeze setpoint and LWT sen-sor fault isn’t active

• EWT is less than the Evap Freeze setpoint and EWT sen-sor fault isn’t active

Run. The control state is Run when

• The flow switch input has been closed for a time greater than the Evaporator Recirculate setpoint.

• The flow switch fault is not active

Pump Selection

The pump output used is determined by the Evap Pump Control setpoint. This setting allows the following configurations:

• #1 only – Pump 1 will always be used

• #2 only – Pump 2 will always be used

• Auto – The primary pump is the one with the least run hours, the other is used as a backup

• #1 Primary – Pump 1 is used normally, with pump 2 as a backup

• #2 Primary – Pump 2 is used normally, with pump 1 as a backup

Primary/Standby Pump Staging

The standby pump will be on if either of the following are true:

• Pump state is Run and the flow switch is open for Evap Proof Time/2

• Pump start is start and Recirculate timeout has expired.

Auto Control

If auto pump control is selected, the primary/standby logic above is still used. When the evaporator is not in the run state, the run hours of the pumps will be compared. The pump with the least hours will be designated as the primary at this time.

Noise Reduction

Noise Reduction is an operating mode designed to reduce unit sound levels by decreasing compressor and fan operating time. It is used during the night when the cooling load is usually reduced and the ambient temperature is lower.

Noise Reduction always requires the Noise Reduction setpoint to be set to ‘enable’. If it is set to ‘disable’, it will not activate for any reason.

Assuming this functionality is enabled, there are two ways it can become active:

If the unit mode is cool, and the unit controller clock time is between the Noise Reduction start time and end time

Control Source setpoint is set to network, and the BAS command is ‘enable’

When Noise Reduction is active, the Maximum Reset is applied to the cool LWT setpoint. However, if any reset type is selected, that reset will continue to be used rather than the Maximum Reset. Also, the saturated condenser target for each circuit will be offset by the Noise Reduction Condenser Target Offset.

96 IOM 1202

Unit Functions

Leaving Water Temperature (LWT) Reset

LWT Target

The LWT Target varies based on settings and inputs and is selected as follows:

Table 73: Leaving Water Temperature Targets

Leaving Water Temperature (LWT) Reset

The base LWT target may be reset if the unit is in Cool mode and it is configured for a reset. The type of reset to be used is determined by the LWT Reset Type setpoint.

When the active reset increases, the Active LWT Target is changed at a rate of 0.2 degrees F every 10 seconds. When the active reset decreases, the Active LWT Target is changed all at once.

After resets are applied, the LWT target can never exceed a value of 60°F.

Reset Type – None

The Active Leaving Water variable is set equal to the current LWT setpoint.

Reset Type – Return Chilled Water

The Active Leaving Water variable is adjusted by the return water temperature.

Start Reset Delta T

LWT set Point+Max Reset(54)

LWT Set Point(44)

Return Reset

0

Max Reset

(10)

Evap Delta T (oF)

ActiveLWT(oF)

The active setpoint is reset using the following parameters:

1 Cool LWT setpoint

2 Max Reset setpoint

3 Start Reset Delta T setpoint

4 Evap Delta T

Reset varies from 0 to Max Reset setpoint as the Evaporator EWT – LWT (Evap delta t) varies from the Start Reset Delta T set-point to 0.

4-20 mA External Signal Reset

The Active Leaving Water variable is adjusted by the 4 to 20 mA reset analog input.

Parameters used:

1 Cool LWT setpoint


3 LWT Reset signal

Reset is 0 if the reset signal is less than or equal to 4 mA. Reset is equal to the Max Reset Delta T setpoint if the reset signal equals or exceeds 20 mA. The amount of reset will vary linearly between these extremes if the reset signal is between 4 mA and 20 mA. An example of the operation of 4-20 reset in Cool mode follows.


Mode Input

BAS Request

Available Modes Setpoint

Base LWT Target

LocalOFF X

COOL

Cool Setpoint 1

ON XCool Setpoint 2

Network X XBAS Cool Setpoint

LocalOFF X

COOL w/Glycol

Cool Setpoint 1

ON XCool Setpoint 2

Network X XBAS Cool Setpoint

LocalOFF x

COOL/ICE w/Glycol

Cool Setpoint 1

ON xIce Setpoint

Networkx COOL

BAS Cool Setpoint

x ICEBAS Ice Setpoint

Local x xICE w/Glycol

Ice Setpoint

Network x xBAS Ice Setpoint

IOM 1202 97

Unit Functions

20

(54)

Cool LWT SetPoint (44)

4

4-20 mA Reset - Cool Mode

0

Max Reset(10)

ActiveLWT(oF)

Reset Signal (mA)

Outside Air Temperature (OAT) Reset

The Active Leaving Water variable is reset based on the outdoor ambient temperature. Parameters used:

1 Cool LWT setpoint


3 Start Reset OAT setpoint

4 Max Reset OAT setpoint

5 OAT

Reset is 0 if the outdoor ambient temperature is greater than Start Reset OAT setpoint. From Start Reset OAT setpoint down to Max Reset OAT the reset varies linearly from no reset to the max reset at Max Reset OAT setpoint. At ambient temperatures less than Max Reset OAT setpoint, reset is equal to the Max Reset setpoint.

75

Cool LWT+Max Reset(54)

Cool LWT Set-Point(44)

OAT Reset

60

Max Reset

(10)

OAT (oF)

ActiveLWT(oF)

Unit Capacity Control

Compressor Staging in Cool Mode

The first compressor on the unit is started when evaporator LWT is higher than the target plus the Startup Delta T setpoint.

An additional compressor is started when Evaporator LWT is higher than the target plus the Stage Up Delta T setpoint.

When multiple compressors are running, one will shut down if evaporator LWT is lower than the target minus the Stage Down Delta T setpoint.

All running compressors will shut down when the evaporator LWT is lower than the target minus the Shut Down Delta T setpoint.

Stage Up Delay

A minimum amount of time will pass between compressors starting, which is defined by the Stage Up Delay setpoint. This delay will only apply when at least one compressor is running. If the first compressor starts and quickly fails on an alarm, another compressor will start without this minimum time passing.

Required Load for Stage Up

An additional compressor will not be started until all running compressors are at a capacity higher than the Load Stage Up setpoint, or running in a limited state.

Light Load Stage Down

When multiple compressors are running, one will shut down if all running compressors are at a capacity lower than the Load Stage Down setpoint and the evaporator LWT is less than the target plus the Stage Up Delta T setpoint. A minimum amount of time will pass between compressors stopping as a result of this logic, which is defined by the Stage Down Delay setpoint.

Light Load Shut Down

When the following conditions are met, the last compressor running on the chiller will be shut down:

• One compressor running

• Evaporator Delta T < 0.25*(Nominal Evap Delta T Set-point/Number of Circuit Setpoint) for longer than five minutes

• Variable Evap Flow Setpoint = No

Maximum Circuits Running

If the number of compressors running is equal to the Max Circuits Running setpoint, no additional compressors will be started.

When multiple compressors are running, one will shut down if the number of compressors running is more than the Max Circuits Running setpoint.

Staging Sequence

This section defines which compressor is the next one to start or stop. In general, compressors with fewer starts will normally start first, and compressors with more run hours will normally stop first. Compressor staging sequence can also be determined by an operator defined sequence via setpoints.

98 IOM 1202

Unit Functions

Next To Start

The next compressor to start must meet the following requirements:

Lowest sequence number of those compressors available to start

-if sequence numbers are equal, it must have the least starts-if starts are equal, it must have least run hours-if run hours are equal, it must be the lowest numbered compressor

Next To Stop

The next compressor to shut down must meet the following requirements:

Lowest sequence number of the compressors that are running-if sequence numbers are equal, it must have the most run hours-if run hours are equal, it must have the fewest starts-if starts are equal, it must be the lowest numbered com-pressor

Compressor Capacity Control in Cool Mode

In Cool mode, evaporator LWT is controlled to a temperature within a calculated variation range of the target under constant flow conditions by controlling capacity of the individual compressors. The allowed variation is plus or minus 4% of nominal evaporator delta t.

Compressors are loaded with a fixed step scheme. The rate of capacity adjustment is determined by the time between capacity changes. The farther away from the target, the faster compressors will be loaded or unloaded.

The logic projects ahead to avoid overshoot, such that the overshoot does not cause the unit to shut off due to evaporator LWT dropping below the target minus the Shutdown Delta T setpoint while there is still a load on the loop at least equal to the minimum unit capacity.

Capacity of the compressors is controlled so that when possible their capacities are balanced.

Circuits that are running in manual capacity control or running with active capacity limiting events are not considered in the capacity control logic.

The compressor capacities are adjusted one at a time while maintaining a capacity imbalance that does not exceed 12.5%.

Load/Unload Sequence

This section defines which compressor is the next one to load or unload.

Next To Load

The next compressor to load meets the following requirements:

Lowest capacity of the running compressors that can load up-if capacities are equal, it must have the lowest sequence number of the compressors that are running-if the sequence numbers are equal, it must have the least starts-if run starts are equal, it must have the least hours-if starts hours are equal, it must be the lowest numbered compressor

Next To Unload

The next compressor to unload must meet the following requirements:

Highest capacity of the running compressors-if capacities are equal, it must have the lowest sequence number of the compressors that are running-if sequence numbers are equal, it must have the most run hours-if run hours are equal, it must have the least starts-if starts are equal, it must be the lowest numbered com-pressor

Compressor Capacity Control in Ice Mode

In Ice mode, running compressors are loaded up simultaneously at the maximum possible rate that allows for stable operation of the individual circuits.

Unit Capacity Overrides

Unit capacity limits are used to limit total unit capacity in Cool mode only. Multiple limits may be active at any time, and the lowest limit is always used in the unit capacity control.

Soft load, demand limit, and network limit use a deadband around the actual limit value, such that unit capacity increase is not allowed within this deadband. If unit capacity is above the deadband, capacity is decreased until it is back within the deadband.

• For 2 circuit units, the deadband is 7%.

• For 3 circuit units, the deadband is 5%.

Soft Load

Soft Loading is a configurable function used to ramp up the unit capacity over a given time. The setpoint that control this function are:

• Soft Load – (ON/OFF)

• Begin Capacity Limit – (Unit %)

• Soft Load Ramp – (seconds)

The Soft Load Unit Limit increases linearly from the Begin Capacity Limit set-point to 100% over the amount of time specified by the Soft Load Ramp set-point. If the option is turned off, the soft load limit is set to 100%.

IOM 1202 99

Unit Functions

Demand Limit

The maximum unit capacity can be limited by a 4 to 20 mA signal on the Demand Limit analog input, usually from a BAS, on the unit controller. This function is only enabled if the Demand Limit setpoint is set to ON and the control is in the COOL mode.

As the signal varies from 4 mA up to 20 mA, the maximum unit capacity changes from 100% to 0%. The unit capacity shall be adjusted as needed to meet this limit, except that the last running compressor cannot be turned off to meet a limit lower than the minimum unit capacity.

Network Limit

The maximum unit capacity can be limited by a network signal. This function is only enabled if the unit control source is set to network. The signal will be received through the BAS interface on the unit controller.

As the signal varies from 0% up to 100%, the maximum unit capacity changes from 0% to 100%. The unit capacity is

adjusted as needed to meet this limit, except that the last running compressor cannot be turned off to meet a limit lower than the minimum unit capacity.

Current Limit

Current Limit control is enabled only when the current limit enable input is ON.

Unit current is calculated based on the 4-20 mA input that receives a signal from an external device. The current at 4 mA is assumed to be 0, and the current at 20 mA is defined by a setpoint. As the signal varies from 4 to 20 mA, the calculated unit current varies linearly from 0 amps to the amp value defined by the setpoint.

The current limit uses a deadband centered around the actual limit value, such that unit capacity increase is not allowed when current is within this deadband. If unit current is above the deadband, capacity is decreased until it is back within the deadband. The current limit deadband is 5% of the current limit.

Figure 62: Current Limit Operation

Maximum LWT Pulldown Rate

The maximum rate at which the leaving water temperature can drop is limited by the Maximum Rate setpoint, only when the LWT is less than 59°F (15°C).

If the pulldown rate is higher than the Maximum Pulldown Rate set point minus 0.1°C, the unit capacity should not be increased.

If the pulldown rate is higher than the Maximum Pulldown Rate set point plus 0.1°C, the unit capacity should be reduced until the rate is less than that value.

High Water Temperature Capacity Limit

If the evaporator LWT exceeds 77°F (25°C), compressor load will be limited to a maximum of 80%. Compressors will unload to 80% or less if running at greater than 80% load when the LWT exceeds the limit. This feature is to keep the circuit running within the capacity of the condenser coil.

100 IOM 1202

Unit Functions

Pumpdown

The circuit state should be Pump down when any of the following conditions are true.

1.Normal shut down alarm exists in Run state.

2.LWT error is less than Shut down delta T in case of 1 circuit running

3.LWT error is less than Stage down delta T in case of 2 circuit running

4.Unit state is Pumpdown

5.Circuit switch is Off

Cycle Timer

There is minimum time between compressor startup and shutdown. The time values are set by global circuit setpoints.

Start-to-start time is the time period from when a compressor starts until it starts again.

Stop-to-start is the time period from when a compressor stops until it restarts.

Table 74: Cycle Time Settings

Circuit Start-up Delta T, Shut-down Delta T

To avoid excessive ON/OFF compressor cycling when the capacity required is very low.

The first compressor on the unit will be started when evaporator LWT is higher than the LWT target plus the Startup Delta T setpoint.

An additional compressor will be started when evaporator LWT is higher than the target plus the Stage Up Delta T setpoint.

When multiple compressors are running, one will shut down if Evaporator LWT is lower than the target minus the Stage Down Delta T setpoint.

All running compressors will shut down when the evaporator LWT is lower than the target minus the Shut Down Delta T setpoint.

Circuit Pulldown Rate

The pulldown rate is established to control the capacity of the compressor so that it does not pull down the chilled water temperature too fast and overshoot the LWT target and to avoid excessive compressor cycling.

The maximum rate at which the leaving water temperature can drop is limited by the Maximum Rate setpoint, only when the LWT is less than 15°C (59°F).

If the pulldown rate is higher than the Maximum Pulldown Rate setpoint minus 0.1°C, the unit capacity will not be increased.

If the pulldown rate is higher than the Maximum Pulldown Rate setpoint plus 0.1°C, the unit capacity will be reduced until the rate is less than that value.

Non-VFD models

EWT slope is calculated such that the slope represents the estimated change in EWT over a time frame of one minute. This slope is used to determine the compressor capacity

VFD models

Compressor capacity is controlled by compressor speed and a sophisticated algorithm is used to determine rate.

Unit Capacity Control

Non-VFD models

An estimate of total unit capacity is needed for applying unit capacity limits. Unit capacity will be based on the estimated circuit capacities. The unit capacity is the average of the estimated circuit capacities.

In Cool mode, evaporator LWT is controlled to a temperature within a calculated variation range of the target under constant flow conditions by controlling capacity of the individual compressors. The allowed variation is plus or minus 4% of nominal evaporator delta t.

Compressors are loaded with a fixed step scheme. The rate of capacity adjustment is determined by the time between capacity changes. The farther away from the target, the faster compressors will be loaded or unloaded.

The logic will project ahead to avoid overshoot, such that the overshoot does not cause the unit to shut off due to evaporator LWT dropping below the target minus the Shutdown Delta T setpoint while there is still a load on the loop at least equal to the minimum unit capacity.

Capacity of the compressors is controlled so that when possible their capacities are balanced.

Circuits that are running in manual capacity control or running with active capacity limiting events are not considered in the capacity control logic.

The compressor capacities are adjusted one at a time while maintaining a capacity imbalance that does not exceed 12.5%.

VFD models

The purpose of this logic is as follows.

• To avoid load/unload hunting.

• To reach LWT target at appropriate speed.

• To avoid unnecessary shut downs.

• To keep LWT within +/-0.1C of LWT target as possible.

Function Default Rangeminimum maximum

Start - Start time 20 min 15 min 60 minStop - Start time 5 min 3 min 20 min

IOM 1202 101

Unit Functions

Compressor capacity is controlled by compressor speed and a sophisticated algorithm is used to determine the rate considering the various parameters affecting capacity.

RapidRestore™ Option

The optional Rapid Restore feature provides a rapid restoration of unit maximum cooling capacity after a short power failure. It requires factory hardware and software changes from a standard unit. No action is required by the operator to activate this feature.

Rapid Restore will be enabled under the following conditions:

1 The power failure exists for up to 180 seconds

2 The unit and circuit switches are ON.

3 No unit or circuit alarms exist.

4 The unit has been running in the normal Run state (except backup unit).

5 The BAS Circuit Mode setpoint is set to Auto when the control source is Remote

6 In installations with a primary/standby arrangement, if the primary unit has a safety shutdown, the standby unit (powered up, waiting for an enable command from the BAS) will start and may take a longer to reach full load on its first start than a unit that has already been running.

If the power failure is less than one second, the chiller start will vary depending on a number of conditions, it may ride through the outage or it may restart in Rapid Restore mode or may remain off on a failure such as no chilled water pump operation.

If the power failure is more than 180 seconds, the unit will start based on the setting of the Stop-to-Start cycle timer (minimum setting of 3 minutes) and load per standard unit without Rapid Restore.

When Rapid Restore is active, the unit will restart within 30 seconds of power restoration.

Use with Backup Unit

Field supplied inputs to the units are required in the unusual case of a backup chiller being started after the power interruption rather than restarting the primary chiller. A field supplied control signal (normally a BAS) must turn off the Backup Chiller connection on the primary unit and turn on the Backup Chiller connection on the backup unit at the time of

switching. See the Field Wiring Diagram for the Backup Chiller connection point (terminals 61 and 62). The backup unit must experience the power failure in order to perform the rapid restore function.

The time to restore full load will vary depending on the compressor starter, type number of compressors and if it is a primary or backup unit as shown on the following table.

Table 75: Time to Full Load

Software Settings

When this option is ordered, hardware is added and factory software changes are made to enable the feature.

• Slide position sensors must be enabled (set to Yes). The setting is located at “View/Set Unit-> Unit Configuration -> Slide Pos Sens=”

• Liquid line solenoid must be enabled (set to Enable). The setting is loacted at “View/Set Unit-> Set-Up -> Liq Line SV=”

• Rapid Restart must be enabled (set to Enable). The set-ting is located at “View/Set Unit ->Set-Up -> Rapid Restart=”

Reduced Amp Rating-Lower Recommended Fuse Size

The following units, when equipped with optional compressor VFDs and having single-point power connection, have the option of being factory configured to be used with lower recommended fuse sizes: AWS 210CDH, AWS 230CDH, AWS 240CDP, AWS 265CDP, AWS 280CDH, AWS 310CDP, AWS 330CDH, AWS 365CDP. When this option is ordered, the maximum leaving water temperature is reduced.

Starter> Y-Delta Solid State VFDStandard Unit w/o Rapid Restore2-Circuit 21.6 min 21.6 min 18.8 min3-Circuit 29.0 min 29.0 min 24.7 minPrimary Unit w/ Rapid Restore2-Circuit 4.9 min 7.3 min 5.9 min3-Circuit 5.3 min 7.8 min 6.3 minBackup Unit w/ Rapid Restore2-Circuit 7.3 min 7.3 min 5.9 min3-Circuit 7.8 min 7.8 min 6.3 min

102 IOM 1202

Circuit Functions
Circuit Functions
Calculations

Refrigerant Saturated Temperature

Refrigerant saturated temperature is calculated from the pressure sensor readings for each circuit. A function provides the converted value of temperature to match values published data for R134a:

-within 0.18°F (0.1°C) for pressure inputs from 0 to 300 psi (0 to 2070kPa)-within 0.36°F (0.2°C) for pressure inputs from -11.6 to 0 psi (80 kPa to 0 kPa)

Evaporator Approach

The evaporator approach is calculated for each circuit. The equation is as follows:

Evaporator Approach = LWT – Evaporator Saturated Tem-perature

Condenser Approach

The condenser approach is calculated for each circuit. The equation is as follows:

Condenser Approach = Condenser Saturated Temperature - OAT

Suction Superheat

Suction superheat is calculated for each circuit using the following equation:

Suction superheat = Suction Temperature – Evaporator Sat-urated Temperature

Discharge Superheat

Discharge superheat is calculated for each circuit using the following equation:

Discharge superheat = Discharge Temperature – Condenser Saturated Temperature

Oil Differential Pressure

Oil Differential Pressure is calculated for each circuit with this equation:

Oil Differential Pressure = Condenser Pressure - Oil Pres-sure

Maximum Saturated Condenser Temperature

The maximum saturated condenser temperature calculation is modeled after the compressor operational envelope.

If Sat Evap Temp < 32°F (0°C) thenMax Sat Cond Temp = 1.596(Sat Evap Temp) +155°F (68.3°C)Otherwise, Max Sat Cond Temp = 155°F (68.3°C)

High Saturated Condenser – Hold ValueHigh Cond Hold Value = Max Saturated Condenser Value – 5°F (2.78°C)

High Saturated Condenser – Unload ValueHigh Cond Unload Value = Max Saturated Condenser Value – 3°F (1.67°C)

Condenser Saturated Temperature Target

The saturated condenser temperature target is calculated by using the following equation:

Sat condenser temp target raw = 0.8332(evaporator sat temp) + 95.0°F (35.0 °C)

This value is then limited to a range defined by the Condenser Saturated Temperature Target min and max setpoint. These setpoint simply cut off the value to a working range, and this range can be limited to a single value if the two setpoint are set to the same value.

Circuit Control Logic

Circuit Availability

A circuit is available to start if the following conditions are true:

• Circuit switch is closed

• No circuit alarms are active

• Circuit Mode setpoint is set to Enable

• BAS Circuit Mode setpoint is set to Auto

• No cycle timers are active

• Discharge Temperature is at least 9°F (5°C) higher than Oil Saturated Temperature

Starting

The circuit will start if all these conditions are true:

• Adequate pressure in the evaporator and condenser (see No Pressure At Start Alarm)

• Circuit Switch is closed

• Circuit Mode setpoint is set to Enable

• BAS Circuit Mode setpoint is set to Auto

• No cycle timers are active

• No alarms are active

• Staging logic requires this circuit to start

• Unit state is Auto

• Evaporator pump state is Run

Circuit Startup Logic

Circuit startup is the time period following the starting of the compressor on a circuit. During the startup, the low evaporator pressure alarm logic is ignored. When the compressor has been running at least 20 seconds and the evaporator pressure rises above the low evaporator pressure unload setpoint, the startup is complete.

If the pressure does not rise above the unload setpoint and the circuit has been running longer than the Startup Time setpoint, then the circuit is turned off and an alarm triggered. If the

IOM 1202 103

Circuit Functions

evaporator pressure drops below the absolute low pressure limit then the circuit is turned off and the same alarm triggered.

Low OAT Restart Logic

Low OAT restart logic allows multiple start attempts in low ambient conditions. If the condenser saturated temperature is less than 60°F (14.6°C) when the compressor starts, the startup is considered to be a ‘low OAT start’. If a low OAT start is not successful the circuit is shut down, but no alarm is triggered for the first two attempts of the day. If a third low OAT start attempt fails, then the circuit is shut down and the Low OAT Restart Alarm is triggered.

The restart counter is reset when a startup is successful or the Low OAT Restart alarm is triggered.

Stopping

Normal Shutdown

A normal shutdown requires the circuit to pumpdown before the compressor is turned off. This is done by closing the EXV, and closing the liquid line solenoid (if present) while the compressor is running.

The circuit will do a normal shutdown (pumpdown) if any of the following are true:

• Staging logic requires this circuit to stop

• Unit State is Pumpdown

• A pumpdown alarm occurs on the circuit

• Circuit switch is open

• Circuit Mode setpoint is set to Disable

• BAS Circuit Mode setpoint is set to Off

The normal shutdown is complete when any of the following are true:

• Evaporator Pressure is less than the Pumpdown Pressure setpoint

• Service Pumpdown setpoint is set to Yes and Evaporator Pressure is less than 5 psi (34.5 kPa)

• Circuit has been pumping down for longer than the Pumpdown Time Limit setpoint

Rapid Shutdown

A rapid shutdown requires the compressor to stop and the circuit to go to the Off state immediately.

The circuit will do a rapid shutdown if either of these conditions occurs at any time:

• Unit State is Off

• A rapid stop alarm occurs on the circuit

Circuit Status

The displayed circuit status is determined by the conditions in the following table:

Table 76: Circuit Status

Enum Status Conditions

0 Off:ReadyCircuit is ready to start when needed.

1Off:Stage Up Delay

Circuit is off and cannot start due to stage up delay.

2Off:Cycle Timer

Circuit is off & cannot start due to active cycle timer.

3Off:BAS Disable

Circuit is off & cannot start due to BAS command.

4Off:Keypad Disable

Circuit is off an&d cannot start due to keypad disable.

5Off:Circuit Switch

Circuit is off & circuit switch is off.

6Off:Refr In Oil Sump

Circuit is off & Discharge Temperature – Oil Saturated Temperature at gas pressure <= 5°C

7 Off:AlarmCircuit is off & cannot start due to active circuit alarm.

8 Off:Test Mode Circuit is in test mode.9 EXV Preopen Circuit is in preopen state.

10Run:Pumpdown

Circuit is in pumpdown state.

11 Run:NormalCircuit is in run state & running normally.

12Run:Disch SH Low

Circuit is running & cannot load due to low discharge superheat.

13Run:Evap Press Low

Circuit is running & cannot load due to low evaporator pressure.

14Run:Cond Press High

Circuit is running & cannot load due to high condenser pressure.

15Run: High LWT Limit

Circuit is running & cannot load due to high evaporator leaving water temperature.

16Run: High VFD Amps

Circuit is running & cannot load due to high compressor VFD current output.

17Off: Max Comp Starts

Circuit is off & cannot start due to four starts in the last hour. Remaining time displayed.

104 IOM 1202

Circuit Functions

Compressor Control

The compressor runs only when the circuit is in a start, run or pumpdown state. The compressor will not be running any time the circuit is off or during preopening the EXV.

Compressor State

The compressor will always be in one of the following states

Compressor Off

The control state will be Off when the circuit state is Off.

Compressor Start

The purpose of this logic is:

• To avoid the suction pressure dropping too much at start.

• To prohibit loading until circuit state is stable.

The control state should be Start up when the circuit state is Start. Start up is controlled by logic considering EXV preopen time, compressor start time, suction superheat and other parameters.

Capacity Control, Non-Compressor VFD Models

After starting, the compressor capacity target should be the minimum of 10%, and no attempt to increase compressor capacity should be made until the compressor has been running at least three minutes and the minimum discharge superheat has been established for at least 30 seconds. After this condition is met, the compressor capacity target shall move via steps to a minimum running capacity even if unit capacity control commands do not require the compressor to load up. This minimum running capacity target is 26% for European chillers and 25% for US chillers.

Once the compressor has been loaded to the minimum running capacity target, the capacity target shall always be at least equal to this value while the compressor is running.

Changes to the capacity target shall be performed as needed to meet unit capacity requirements based on load and unload commands (see unit capacity control section). For European chillers, the standard capacity target step is 4%, and for US chillers it is 5%.

A minimum time of 20 seconds should pass between capacity changes other than the capacity transitions from 50% to 60% or from 60% to 50%. For those capacity transitions, a

minimum time of 30 seconds should pass before capacity is changed again.

Capacity Control, Compressor VFD Models

The control state is Capacity control when the circuit state is Run.

The purpose of this logic is as follows.To avoid the unnecessary shut down due to excessive load-ing.In the high LWT area, the loading should be faster.When the DSH is low, it could be an abnormal situation, so the loading should be limited.

Load control

Comp will Load when all the following is true.

• LWT error > Keep dead band

• EWT Pd Rate < EWT Pd Rate limit

• DSH > 12C for 30sec at least

Unload control

Compressor will Unload when any of the following conditions are true

• LWT error < minus Keep dead band

• HP > HP_unload

• LP < LP_unload

• EWT Pd Rate > EWT Pd Rate for unload

• Inverter over current unload

Manual capacity control

This function is only for use by authorized service personnel and a special password is requires for access.

Condenser Fan Control

The compressor must be running in order to stage fans on. All running fans will turn off when compressor goes to the Off state.

Saturated Condenser Temperature Target

The saturated condenser temperature target is calculated by first using the following equation:

Sat condenser temp target raw = 0.8332(suction sat temp) + 63.6°F (35.0°C)

This value is then limited to a range defined by the Condenser Saturated Temperature Target min and max setpoint. These setpoint simply cut off the value to a working range, and this range can be limited to a single value if the two setpoint are set to the same value.

Name MeaningOff Comp off. Start Comp in Start control. Run Comp in auto or manual

Pump down Comp in shut down control.

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Circuit Functions

Fan Control without VFD

The fan stage is adjusted in steps of 1 fan. Fan staging will accommodate anywhere from 5 to 12 fans per circuit according to the following table:

Figure 63: Fan Staging Up and Down

If this error accumulation is greater than 19.6ºF (11ºC), then stage up.

If this error accumulation is greater than 5.0ºF (2.8ºC), then stage down.

(Target) + (Fan Stage Up Deadband)

Target Discharge Saturated Temp

(Target) - (Fan Stage Down Deadband)

Referring to Figure 63, a fan will run normally when the saturated discharge temperature (equivalent to discharge pressure) is between the Target Temperature plus the stage up deadband and minus the stage down deadband.

If the saturated temperature exceeds the stage up or stage down setting, an error accumulation is calculated. The error accumulation takes into account how great the error is and its duration. A small error can exist for a relatively long time and a large error for a relatively short time before a fan is staged on or off.

If the saturated temperature returns to within the deadband area, the error accumulation is cleared.

Staging Up

Six stage-up deadbands are used. Stages one through five use their respective dead bands. Stages six through twelve all use the sixth stage up dead band.

When the saturated condenser temperature is above the Target + the active deadband, a Stage Up error is accumulated.

Stage Up Error Step = Saturated Cond. temperature – (Target + Stage-Up deadband)

The Stage Up Error Step is added to Stage Up Accumulator once every 5 seconds, only if the Saturated Condenser Refrigerant Temperature is not falling. When Stage Up Error Accumulator is greater than 19.8°F (11°C) another stage is added.

If the circuit is configured to have a VFD on the first fan, then the first fan will turn on when condenser temperature is above the target.

When a stage up occurs or the saturated condenser temperature falls back within the Stage Up dead band the Stage Up Accumulator is reset to zero.

Output Number # of fans1 2 3 4 5 6

* * ** * 5

* * ** ** 6

* * ** ** * 7

* * ** ** ** 8

* * ** ** *** 9* * ** ** *** * 10

* * ** ** *** ** 11

* * ** ** *** *** 12

106 IOM 1202

Circuit Functions

Staging Down

Five stage down dead bands are used. Stages two through five use their respective dead bands. Stages six through twelve all use the stage six dead band.

When the saturated condenser refrigerant temperature is below the Target – the active deadband, a Stage Down error is accumulated.

Stage Down Error Step = (Target - Stage Down dead band) - Saturated Condenser Refrigerant temperature

The Stage Down Error Step is added to Stage Down Accumulator once every 5-second Stage Down Error Delay seconds. When the Stage Down Error Accumulator is greater than 37°F (2.8°C) another stage of condenser fans is removed.

When one fan is running, a fixed point is used in place of a deadband. When the Saturated Condenser temperature drops below 70°F (21.1°C), stage down error is accumulated.

Fan Control with VFD

Condenser pressure trim control is accomplished using an optional VFD on the first fan. This VFD control varies the fan speed to drive the saturated condenser temperature to a target value. The target value is normally the same as the saturated condenser temperature target.

VFD State

The VFD speed signal is always 0 when the fan stage is 0.

When the fan stage is greater than 0, the VFD speed signal is enabled and controls the speed as needed.

Stage Up Compensation

In order to create a smoother transition when another fan is staged on, the VFD compensates by slowing down initially.

This is accomplished by adding the new fan stage up deadband to the VFD target. The higher target causes the VFD logic to decrease fan speed.

Then, every 2 seconds, 0.1°C is subtracted from the VFD target until it is equal to the saturated condenser temperature target set point.

This will allow the VFD to slowly bring the saturated condenser temperature back down.

EXV Control

The EXV is moved at a rate of 150 steps per second, with a total range of 3810 steps. Positioning is determined as described in the following sections, with adjustments made in increments of 0.1% of the total range.

Closed Position

When the EXV enters the closed state, it should be reinitialized to maintain accurate positioning.

If the unit is configured for use without liquid line solenoid valves, the EXV position is 0% any time the EXV is in a closed state.

If the unit is configured for use with liquid line solenoid valves, the EXV position will be 0% when the EXV initially enters the closed state, while it is reinitializing to the zero position. After the EXV position command has been 0% for a minute, the EXV will be moved to 5% (to prevent excessive pressure buildup between EXV and liquid line solenoid valve).

Preopen Operation

Preopen operation will vary depending on the unit configuration. The unit will be configured for use with or without liquid line solenoid valves via a setpoint.

Without Liquid Line Solenoid Valves

The EXV control will open the EXV to 5% for 5 seconds before the compressor is started.

With Liquid Line Solenoid Valves

If evaporator pressure is less than condenser pressure when a circuit start is required, the EXV control will preopen the EXV to 50% for 15 seconds. Otherwise, the preopen time will be 0 (position is already 5%).

Pressure Control Operation

In pressure control, the EXV is positioned to control the evaporator pressure. The pressure target varies based on evaporator LWT and discharge superheat values.

The base target is limited to a range from the low pressure inhibit setpoint plus 2 psi (14 kPa), up to 50.7 psi (350 kPa).

The pressure control target may be adjusted if the discharge superheat is not within an acceptable range. If the superheat is less than 21.6°F (12°C), the pressure target will be reduced. If the superheat is more than 39.6°F (22°C), the pressure target will be increased. The adjusted target is limited to a range from the low pressure inhibit setpoint plus 2 psi (14 kPa), up to 50.7 psi (350 kPa).

When the EXV transitions from superheat control to pressure control, the target will start at the current evaporator pressure value. The pressure target will then be decreased until reaching the normal calculated target, at a rate of 0.43 psi (3 kPa) per second. If the pressure at transition is less than the calculated target, then pressure control will start immediately with the calculated target.

When the EXV transition from preopen to pressure control, the target starts at the minimum and is held there for three minutes. After that time, the target is increased until it meets the calculated target, at a rate of 0.43 psi (3 kPa) per second.

The EXV should control the evaporator pressure to within 1.0 psi (7 kPa) of the target during stable operating conditions

IOM 1202 107

Circuit Functions

(stable water loop, static compressor capacity, and stable condensing temperature).

Superheat Control Operation

In superheat control, the EXV is positioned to control suction superheat. The superheat target varies linearly from 5 to 9.9 °F (2.8 to 5.5 °C) as discharge superheat changes from 30.6 to 21.6 °F (17 to 12 °C). This target is constantly updated, and averaged over a 10 second period.

When the EXV transitions to the superheat control state, the target will start at the current suction superheat value. This target will then be decreased 0.18°F (0.1°C) every five seconds until reaching the normal calculated target.

The EXV should control the suction superheat to within 1.5°F (0.8°C) of the target during stable operating conditions (stable water loop, static compressor capacity, and stable condensing temperature).

Control State Transitions

When the circuit is required to start, the EXV will go into the Preopen control state. After being in this state for the time period required, the EXV can transition to Pressure Control. The compressor will start at the same time that this occurs.

While the circuit is in a run state, the EXV will always be in either Pressure Control or Superheat Control.

The transition from Pressure Control to Superheat Control requires all of the following:

• Evap LWT <= 59.9°F (15.5°C)

• Suction Superheat >= suction superheat target

• EXV control state has been in pressure control and dis-charge superheat >= 12°C (21.6°F) for at least 3 minute

• Low Evap Pressure Unload alarm is not active

The transition from Superheat Control to Pressure Control will occur if any of the following conditions exist:

• Discharge Superheat < 12°C (21.6°F)

• Evap LWT > 17°C (62.6°F)

Any time the circuit is in the Off state or Pumpdown state, the EXV should be in the closed position.

Response to Compressor Capacity Change

The logic will consider transition from 50% to 60% and from 60% to 50% as special conditions. During this time, the EXV will operate in a way that prevents over-feeding or under-feeding the evaporator such that adequate superheats are maintained following the transition, no liquid ingestion by the

compressor occurs, and no evaporator pressure dip causes low pressure alarms.

Minimum Operating Position

Whenever the compressor is running and the circuit is not pumping down, the EXV position is limited to a minimum of 5%.

Auto Control

When the EXV is in auto control and the EXV control state is either pressure control or superheat control, the position will be adjusted using a PID function. This function should control the pressure or superheat as outlined in the preceding sections.

The compressor size setting will adjust the proportional factor of the PID when in superheat control to allow for stable control of the superheat.

Manual Control

The EXV position can be set manually. Manual control can only be selected when the EXV state is Pressure or Superheat control. At any other time, the EXV control setpoint is forced to auto.

When EXV control is set to manual, the EXV position is equal to the manual EXV position setting. If set to manual when the circuit state transitions from run to another state, the control setting is automatically set back to auto. If EXV control is changed from manual back to auto while the circuit state remains run, the EXV state will go back to the normal operations if possible or to pressure control to limit maximum operating pressure.

Economizer Control

Non-VFD: The circuit economizer will be activated when the circuit is in a run state and the capacity exceeds 95%. It will turn back off when either the load drops below 80% or the circuit is no longer in a run state.

Compressor VFD: The economizer is on any time the circuit is running.

Liquid Injection

Liquid injection will be activated when the circuit is in a run state and the discharge temperature rises above the Liquid Injection Activation setpoint.

Liquid injection will be turned off when the discharge temperature decreases below the activation setpoint by a differential of 27°F (15°C).

108 IOM 1202

Circuit Functions

Liquid Line Solenoid Valve

The liquid line solenoid valve output will be on any time the circuit is in the Start or Run state. It will be off when the circuit is in the Off, Preopen, or Pumpdown states.

Capacity Overrides – Limits of Operation

The following conditions will override automatic capacity control as described. These overrides keep the circuit from entering a condition in which it is not designed to run.

Low Evaporator Pressure

This limit is to be applied only when the chiller is operating in COOL mode.

If the Low Evaporator Pressure Hold alarm is triggered, the compressor will not be allowed to increase in capacity.

If the Low Evaporator Pressure Unload alarm is triggered, the compressor will begin reducing capacity.

The compressor will not be allowed to increase in capacity until the Low Evaporator Pressure Hold alarm has cleared.

See the Circuit Alarms section for details on triggering, reset, and unloading action.

High Condenser Pressure

This limit is to be applied only when the chiller is operating in COOL mode.

If the High Condenser Pressure Hold alarm is triggered, the compressor will not be allowed to increase capacity.

If the High Condenser Pressure Unload alarm is triggered, the compressor will begin reducing capacity.

The compressor will not be allowed to increase in capacity until the High Condenser Pressure Hold alarm has cleared.

See the Circuit Alarm section for details on triggering, reset, and unloading action.

High Water Temperature Capacity Limit

If the evaporator LWT is 25°C (77°F) or higher, compressor capacity will be limited to a maximum of 80%. Compressors should unload to 80% or less if running at greater than 80% capacity when the LWT exceeds 25°C (77°F).

IOM 1202 109

Alarms and Events
Alarms and Events
Situations may arise that require some action from the chiller, or that should be logged for future reference. Alarms are classified in the following sections per the Global Chiller Protocol Standard using the Fault/Problem/Warning scheme.

When any Unit Fault Alarm is active, the alarm digital output will be turned on. If no Unit Fault Alarm is active, but any Circuit Fault Alarm is active, the alarm digital output will alternate five seconds on and five seconds off constantly. In addition, if a Circuit Fault Alarm is active, the circuit alarm output for that circuit will be turned on.

Signaling Alarms

The following actions will signal that an alarm has occurred:

The unit or a circuit will execute a rapid or pumpdown shutoff.

An alarm bell icon will be displayed in the upper right-hand corner of all controller screens including the optional remote user interface panel’s screens.

An optional field supplied and wired remote alarm device will be activated.

Clearing Alarms/Faults

Active alarms can be cleared through the keypad/display or a BAS network. Alarms are automatically cleared when controller power is cycled. Alarms are cleared only if the conditions required to initiate the alarm no longer exist. All alarms and groups of alarms can be cleared via the keypad or network via LON using nviClearAlarms and via BACnet using the ClearAlarms object.

To use the keypad, follow the Alarm links to the Alarms screen, which will show Active Alarms and Alarm Log. Select Active Alarm and press the wheel to view the Alarm List (list of current active alarms). They are in order of occurrence with the most recent on top. The second line on the screen shows Alm Cnt (number of alarms currently active) and the status of the alarm clear function. Off indicates that the Clear function is off and the alarm is not cleared. Press the wheel to go to the edit mode. The Alm Clr (alarm clear) parameter will be highlighted with OFF showing. To clear all alarms, rotate the wheel to select ON and enter it by pressing the wheel.

An active password is not necessary to clear alarms.

If the problem(s) causing the alarm have been corrected, the alarms will be cleared, disappear from the Active Alarm list and be posted in the Alarm Log. If not corrected, the On will immediately change back to OFF and the unit will remain in the alarm condition.

Remote Alarm Signal

The unit is configured to allow field wiring of a remote alarm device. See Figure 38, page 42 for field wiring information.

Description of Alarms

The alarms have the following conventions:

ALARM, any condition outside of normal operation requiring some action on the part of the control or information useful to the operator or to be logged for future reference

WARNING, an alarm indicating a condition that is not critical to safe unit operation, but is worthy of note and/or logging.

PROBLEM, a alarm that indicates operation off normal and requires some action by the control such as unloading a compressor.

FAULT, an alarm with consequences serious enough to require a compressor, a circuit, or entire unit to shutdown. The shutdown may be rapid, bypassing the pumpdown cycle, or controlled and incorporate the pumpdown cycle.

Alarm description conventions:

• CnCmpn OffMechPressLo, the Cn is the circuit number;the Cmpn is the compressor number.

• UnitOff EvapWaterFlow, UnitOff refers to the entireunit.

Unit Faults

Evaporator Flow Loss

Alarm description (as shown on screen): UnitOffEvapWaterFlow

Trigger:

1: Evaporator Pump State = Run AND Evaporator Flow Digital Input = No Flow for time > Flow Proof Setpoint AND at least one compressor running

2: Evaporator Pump State = Start for time greater than Recirc Timeout Setpoint and all pumps have been tried

Action Taken: Rapid stop all circuits

Reset: This alarm can be cleared manually via the unit controller keypad or BAS command, if active via trigger condition 1:

When the alarm occurs due to this trigger, it can auto reset the first two times each day, with the third occurrence being manual reset.

For the auto reset occurrences, the alarm will reset automatically when the evaporator state is Run again. This means the alarm stays active while the unit waits for flow, then it goes through the recirculation process after flow is detected. Once the recirculation is complete, the evaporator goes to the Run state which will clear the alarm. After three occurrences, the count of occurrences is reset and the cycle starts over if the manual reset flow loss alarm is cleared.

If active via trigger condition 2:

110 IOM 1202

Alarms and Events

If the flow loss alarm has occurred due to this trigger, it is a manual reset alarm.

Evaporator Water Freeze Protect

Alarm description (as shown on screen): UnitOffEvapWaterTmpLo

Trigger: Evaporator LWT or EWT drops below evaporator freeze protect setpoint. If the sensor fault is active for either LWT or EWT, then that sensor value cannot trigger the alarm.


Reset: This alarm can be cleared manually via the unit controller keypad if the alarm trigger conditions no longer exist.

Evaporator Water Temperatures Inverted

Alarm description (as shown on screen): UnitOffEvpWTempInvrtd

Trigger: Evap EWT < Evap LWT - 1 deg C AND at least one circuit is running AND EWT sensor fault not active AND LWT sensor fault not active for 30 sec

Action Taken: Pumpdown stop on all circuits

Reset: This alarm can be cleared manually via the unit controller keypad or BAS command.

Leaving Evaporator Water Temperature Sensor Fault

Alarm description (as shown on screen): UnitOffEvpLvgWTempSen

Trigger: Sensor shorted or open


Reset: This alarm can be cleared manually via the unit controller keypad or BAS command if the sensor is back in range.

Entering Evaporator Water Temperature Sensor Fault

Alarm description (as shown on screen: UnitOffEvpEntWTempSen


Action Taken: Pumpdown stop of all circuits


Outdoor Air Temperature Sensor Fault

Alarm description (as shown on screen): UnitOffAmbTempSen


Action Taken: Normal shutdown of all circuits


External Alarm

Alarm description (as shown on screen): UnitOffExternal Alarm

Trigger: External Alarm/Event input is open for at least 5 seconds and external fault input is configured as an alarm

Action Taken: Rapid stop of all circuits

Reset: Auto clear when digital input is closed

Emergency Stop Alarm

Alarm description (as shown on screen): UnitOffEmergencyStop

Trigger: Emergency Stop input is low

Action Taken: Rapid stop of all circuits

Reset: Auto clear when digital input is high

Primary Pump Failure Alarm

Alarm description (as shown on screen): UnitOffPriPumpFailAlarm

Trigger: Pump has been switched (only if pump is “Auto”, ‘#1 or #2 Primary”.

Action Taken: Alarm to BAS

Reset: Manual when condition cleared

Unit Warnings

The following unit events are logged in the warning log with a time stamp.

Unit Power Restore

Alarm description (as shown on screen): UnitPowerRestore

Trigger: Unit controller is powered up

Action Taken: none

Reset: none

External Event

Alarm description (as shown on screen): UnitExternalEvent

Trigger: External Alarm/Event input is open for at least 5 seconds and external fault is configured as an event

Action Taken: None

Reset: Auto clear when digital input is closed

Bad Demand Limit Input

Alarm description (as shown on screen): BadDemandLimitInput

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Alarms and Events

Trigger: Demand limit input out of range and demand limit is enabled. For this alarm out of range is considered to be a signal less than 3mA or more than 21mA

Action Taken: None

Reset: Auto clear when demand limit disabled or demand limit input back in range for 5 seconds

Bad Setpoint Override Input

Alarm description (as shown on screen): BadSetptOverrideInput

Trigger: LWT reset input out of range and LWT reset = 4-20mA. For this alarm out of range is considered to be a signal less than 3mA or more than 21mA.

Action Taken: None

Reset: Auto clear when LWT reset is not 4-20mA or LWT reset input back in range for 5 seconds

Low Ambient Lockout

Alarm description (as shown on screen): StartInhbtAmbTempLo

Trigger: The OAT drops below the low ambient lockout setpoint

Action Taken: Normal shutdown of all running circuits

Reset: The lockout clears when OAT rises to the lockout setpoint plus (4.5°F)

Circuit Faults

All circuit stop alarms require shutdown of the circuit on which they occur. Rapid stop alarms do not do a pumpdown before shutting off. All other alarms will do a pumpdown.

When one or more circuit alarms are active and no unit alarms are active, the alarm output will be switched on and off on 5 second intervals.

Alarm descriptions apply to all circuits, the circuit number is represented by ‘n’ in the description.

Phase Volts Loss/GFP Fault

Alarm description (as shown on screen): UnitOffPhaseVoltage or CnOff PhaseVoltage

Trigger: PVM input is low and PVM setpoint = Multi Point

Action Taken: Rapid stop unit or circuit

Reset: Auto reset when PVM input is high or PVM setpoint does not equal multi point for at least 5 seconds

Low Evaporator Pressure

Alarm description (as shown on screen): CnCmpnOffEvpPressLo

Trigger: [Freezestat trip AND Circuit State = Run] OR Evaporator Press < -10 psi

Freezestat logic allows the circuit to run for varying times at low pressures. The lower the pressure, the shorter the time the compressor can run. This time is calculated as follows:

Freeze error = Low Evaporator Pressure Unload – Evaporator Pressure

Freeze time = 70 – 6.25 x freeze error, limited to a range of 20-70 seconds

When the evaporator pressure goes below the Low Evaporator Pressure Unload setpoint, a timer starts. If this timer exceeds the freeze time, then a freezestat trip occurs. If the evaporator pressure rises to the unload setpoint or higher, and the freeze time has not been exceeded, the timer will reset.

The alarm cannot trigger if the evaporator pressure sensor fault is active.

Action Taken: Rapid stop circuit

Reset: The alarm is cleared manually if the evaporator pressure is above 10 psi.

Low Pressure Start Fail

Alarm description (as shown on screen): CnOffStrtFailEvpPrLo

Trigger: Circuit state = start for time greater than Startup Time setpoint.



High Condenser Pressure

Alarm description (as shown on screen): CnCmpnOffCondPressHi

Trigger: Condenser Saturated Temperature > Max Saturated Condenser Value for time > High Cond Delay setpoint.


Reset: This alarm can be cleared manually via the unit controller keypad.

Low Pressure Ratio

Alarm description (as shown on screen): CnCmpnOff PrRatioLo

Trigger: Pressure ratio < calculated limit for a time > Low Pressure Ratio Delay setpoint after circuit startup has completed. The calculated limit will vary from 1.4 to 1.8 as the compressor’s capacity varies from 25% to 100%.

Action Taken: Normal shutdown of circuit


112 IOM 1202

Alarms and Events

Mechanical High Pressure (MHP) Switch

Alarm description (as shown on screen): CnCmpnOffMechPressHi

Trigger: Mechanical High Pressure switch input is low AND Emergency Stop Alarm is not active. (Opening emergency stop switch kills power to MHP switches). Input must be off for one second before alarm is active.


Reset: This alarm can be cleared manually via the unit controller keypad if the MHP switch input is high

High Discharge Temperature

Alarm description (as shown on screen): CnCmpn OffDischTmpHi

Trigger: Discharge Temperature > High Discharge Temperature setpoint AND compressor is running. Alarm cannot trigger if temperature sensor fault is active


Reset: This alarm can be cleared manually via the unit controller keypad or BAS command

High Oil Pressure Difference

Alarm description (as shown on screen): CnCmpnOffOilPrDiffHi

Trigger: Oil Pressure Differential > High Oil Pressure Differential setpoint for a time greater than Oil Pressure Differential Delay


Reset: This alarm can be cleared manually via the unit controller keypad or BAS command

Compressor Starter Fault

Alarm description (as shown on screen): CnCmpnOffStarterFlt

Trigger:

If PVM setpoint = None(SSS): any time starter fault input is open

If PVM setpoint = Single Point or Multi Point: compressor has been running for at least 14 seconds and starter fault input is open



Compressor VFD Fault

Alarm description (as shown on screen): CnCmpnOffVfdFault

Trigger: VFD is sending a fault status to controller via modbus communications

Action Taken: Shutdown compressor n

Reset: Lookup VFD alarm code to determine why the VFD is faulted. Clear alarm manually via the unit controller keypad after the VFD fault is fixed.

High Motor Temperature

Alarm description (as shown on screen): CnCmpnOffMotorTempHi

Trigger:

For European chillers - Input value for the motor temperature is 4500 ohms or higher or input is open

For US chillers - Motor Temperature input is open for two seconds delay


Reset:

For European chillers - This alarm can be cleared manually via the unit controller keypad after input value for motor temperature has been 300 ohms or less for at least 5 minutes.

For US Chillers - This alarm can be cleared manually via the unit controller keypad after Motor Protection input has been closed for at least 5 minutes.

No Pressure Change After Start

Alarm description (as shown on screen): CnOffNoPressChgStart

Trigger: After start of compressor, at least a 3.6 psi drop in evaporator pressure OR 5 psi increase in condenser pressure has not occurred after 15 seconds



Low OAT Restart Fault

Alarm description (as shown on screen): CnCmpnOffNbrRestarts

Trigger: Circuit has failed three low OAT start attempts



No Pressure At Startup

Alarm description (as shown on screen): CnOffNoPressAtStart

Trigger: Either Evap Pressure < 35 kPa (5.1 psi) OR Cond Pressure < 35 kPa (5.1 psi) AND Compressor start requested AND circuit does not have a fan VFD


Reset: This alarm can be cleared manually via the unit controller keypad or BAS command if Evap Pressure < 35 kPa

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Alarms and Events

(5.1 psi) and Cond Pressure < 35 kPa (5.1 psi), or circuit is configured for fan VFD.

CC Comm Failure N Circuit Fault

Alarm description (as shown on screen): CnOffCmpCtrlrComFail or CnOffEXVCtrlrComFail

Trigger: Communication with the compressor or EXV I/O extension module has failed

Action Taken: Rapid stop of affected circuit

Reset: This alarm can be cleared manually via the unit controller keypad or BAS command when communication between main controller and the extension module is working for 5 seconds.

Compressor VFD Overheat Fault - Shutdown

Alarm description (as shown on screen): CnCmpnOffVfdTempHi

Trigger: VFD heat sink temperature has exceeded 248°F (120°C)


Reset: This alarm can be cleared manually via the unit controller keypad or BAS command if the VFD heat sink temperature is below the alarm setpoint.

Comm Error with Compressor VFD - Shutdown

Alarm description (as shown on screen): CnCmpnOffVfdCommFail

Trigger: The controller has failed a predetermined number of Modbus reads or writes with the VFD


Reset: This alarm can be cleared manually via the unit controller keypad or BAS command if communications is restored

Current Overload Trip - Shutdown

Alarm description (as shown on screen): CnCmpnOffCurrentHi

Trigger: VFD output current has exceeded 130% of the compressor RLA.



Evaporator Pressure Sensor Fault

Alarm description (as shown on screen): CnCmpnOffEvpPress Sen

Trigger: When sensor is shorted or open, the alarm should be triggered, with the following exception. If the evaporator LWT is 30°C (86°F) or higher, the fault should not be triggered

due to the input signal reading too high unless the circuit has been running for longer than 90 seconds


Reset: This alarm can be cleared manually via the unit controller keypad or BAS command if the sensor is back in range

Condenser Pressure Sensor Fault

Alarm description (as shown on screen): CnCmpnOffCondPressSen



Reset: This alarm can be cleared manually via the unit controller keypad or BAS if the sensor is back in range.

Oil Pressure Sensor Fault

Alarm description (as shown on screen): CnCmpnOffOilFeedSen




Suction Temperature Sensor Fault

Alarm description (as shown on screen): CnCmpnOffSuctTempSen

Trigger: Sensor shorted or open. Sensor must be out of range for one second before alarm is active.



Discharge Temperature Sensor Fault

Alarm description (as shown on screen): CnCmpnOffDishTmpSen




Motor Temperature Sensor Fault

Alarm description (as shown on screen): CnCmpnOffMtrTempSen

Trigger: Sensor shorted



114 IOM 1202

Alarms and Events

Slide Position Sensor Fault

Alarm description (as shown on screen): CnCmpnOffSlidePosSen

Trigger: Slide position input out of range and Slide Pos Sens= Yes. For this alarm out of range is considered to be a signal less than 1mA or more than 23mA.



Low Discharge Superheat

Alarm description (as shown on screen): CnCmpn OffLowDischSH

Trigger: Discharge superheat < 12°C (21.6°F) for 20 minutes



Low Remote Evaporator pressure

Alarm description (as shown on screen): CnCmpn OffMechPressLo

Trigger: [Freezestat trip AND Circuit State = Run OR Evaporator Press , -10 psi

When the remote evaporator pressure goes below the Low Remote Evaporator Pressure Unload setpoint, a timer starts. If this timer exceeds the freeze time, then a freezestat trip occurs. If the evaporator pressure rises to the unload setpoint or higher, and the freeze time has not been exceeded, the timer will reset.


Reset: This alarm is cleared manually if the evaporator pressure is above 10 psi.

Circuit Problems

The following events limit operation of the circuit in some way as described in the Action Taken column. The occurrence of a circuit event only affects the circuit on which it occurred. Circuit events are logged in the event log on the unit controller.

Low Evaporator Pressure - Hold

Event description (as shown on screen): CnInhbtLoadEvpPrLo

Trigger: This event is not enabled until the circuit startup is complete and the unit mode is Cool. Then, while running, if evaporator pressure <= Low Evaporator Pressure Hold setpoint the event is triggered. The event is not to be triggered for 90 seconds following the capacity change of the compressor from 50% to 60%.

Action Taken: Inhibit loading.

Reset: While still running, the event will be reset if evaporator pressure > (Low Evaporator Pressure Hold SP + 2psi). The event is also reset if the unit mode is switched to Ice, or the circuit is no longer in the run state.

Low Evaporator Pressure - Unload

Event description (as shown on screen): CnUnloadEvpPressLo

Trigger: This event is not enabled until the circuit startup is complete and the unit mode is Cool. Then, while running, if evaporator pressure <= Low Evaporator Pressure Unload setpoint the event is triggered. The event is not to be triggered for 90 seconds following the capacity change of the compressor from 50% to 60%.

Action Taken: Unload the compressor by decreasing the capacity by one step every 5 seconds until the evaporator pressure rises above the Low Evaporator Pressure Unload setpoint.

Reset: While still running, the event will be reset if evaporator pressure > (Low Evaporator Pressure Hold SP + 2psi). The event is also reset if the unit mode is switched to Ice, or the circuit is no longer in the run state.

High Condenser Pressure - Hold

Event description (as shown on screen): CnInhbtLoadCndPrHi

Trigger: While the compressor is running and unit mode is Cool, if saturated condenser temperature >= High Saturated Condenser Hold Value, the event is triggered.

Action Taken: Inhibit loading

Reset: While still running, the event will be reset if saturated condenser temperature < (High Saturated Condenser Hold Value – 10oF). The event is also reset if the unit mode is switched to Ice, or the circuit is no longer in the run state.

High Condenser Pressure - Unload

Event description (as shown on screen): CnUnloadCndPressHi

Trigger: While the compressor is running and unit mode is Cool, if saturated condenser temperature >= High Saturated Condenser Unload Value, the event is triggered.

Action Taken: Unload the compressor by decreasing the capacity by one step every 5 seconds until the evaporator pressure rises above the High Condensing Pressure Unload setpoint.

Reset: While still running, the event will be reset if saturated condenser temperature < (High Saturated Condenser Unload Value – 10oF). The event is also reset if the unit mode is switched to Ice, or the circuit is no longer in the run state.

IOM 1202 115

Alarms and Events

Compressor Motor Current High - Unload

Alarm description (as shown on screen): CnCmpnUnloadAmpsHi

Trigger: VFD output amps exceeds unload setpoint

Action Taken: Unload compressor n

Reset: Automatically resets when the VFD output amps are below 116% of motor rated load amps for 5 seconds.

Compressor Motor Current High – Inhibit Load

Alarm description (as shown on screen): CnCmpnInhbtLdAmpsHi

Trigger: VFD output amps exceeds hold setpoint

Action Taken: Compressor n can not increase it’s capacity (must hold at it’s current capacity).

Reset: Automatically resets when the VFD output amps are below 116% of motor rated load amps for 10 seconds.

Failed Pumpdown

Event description (as shown on screen): CnFailedPumpdown

Trigger: Circuit state = pumpdown for time > Pumpdown Time setpoint

Action Taken: Shutdown circuit

Reset: N/A

Power Loss While Running

Event description (as shown on screen): CnPwrLossRun

Trigger: Circuit controller is powered up after losing power while compressor was running

Action Taken: N/A

Reset: N/A

Alarm Logging

When an alarm occurs, the alarm type, date, and time are stored in the active alarm buffer corresponding to that alarm (viewed on the Alarm Active screens) also in the alarm history buffer (viewed on the Alarm Log screens). The active alarm buffers hold a record of all current alarms.

A separate alarm log stores the last 25 alarms to occur. When an alarm occurs, it is put into the first slot in the alarm log and all others are moved down one, dropping the last alarm. The date and time the alarm occurred are stored in the alarm log.

Event Log

This menu is accessed through the alarm menu. It gives access to the event occurrence over a seven day period and the last occurrence with time and date for:

• Unit Power Restore

• Low Pressure Hold

• Low Pressure Unload

• High Pressure Hold

• High Pressure Unload

• High Current Hold

• High Current Unload

116 IOM 1202

Using the Controller
The Unit Controller Operation

Figure 64: Unit Controller

The keypad/display consists of a 5-line by 22-character display, three buttons (keys) and a “push and roll” navigation wheel. There is an Alarm Button, Menu (Home) Button, and a Back Button. The wheel is used to navigate between lines on a screen (page) and to increase and decrease changeable values when editing. Pushing the wheel acts as an Enter Button and will jump from a link to the next set of parameters.

Figure 65: Typical Screen

Generally, each line on the display contains a menu title, a parameter (such as a value or a setpoint), or a link (which will have an arrow in the right of the line) to a further menu.

The first line visible on each display includes the menu title and the line number to which the cursor is currently “pointing”, in the above case 3, Temperature.

The left most position of the title line includes an “up” arrow ▲ to indicate there are lines (parameters) “above” the currently displayed line; and/or a “down” arrow ▼ to indicate there are lines (parameters) “below” the currently displayed items or an “up/down” arrow ♦ to indicate there are lines

“above and below” the currently displayed line. The selected line is highlighted.

Each line on a screen can contain status-only information or include changeable data fields (setpoints).

When the cursor is on a line the highlights will look like this:

If line contains a changeable value-

If the line contains status-only information-

Or a line in a menu may be a link to further menus. This is often referred to as a jump line, meaning pushing the navigation wheel will cause a “jump” to a new menu. An arrow (>)is displayed to the far right of the line to indicate it is a “jump” line and the entire line is highlighted when the cursor is on that line.

NOTE - Only menus and items that are applicable to the specific unit configuration are displayed.

This manual includes information relative to the operator level of parameters; data and setpoints necessary for the every day operation of the chiller. There are more extensive menus available for the use of service technicians.

♦6 View/Set Unit 3Status/Settings >Set Up >Temperature >Date/Time/Schedule >

Evaporator Delta T= 10.0F

Unit Status= Run

IOM 1202 117


Navigating

When power is applied to the control circuit, the controller screen will be active and display the Home screen, which can also be accessed by pressing the Menu Button The navigating wheel is the only navigating device necessary, although the MENU, ALARM, and BACK buttons can provide shortcuts as explained later.

Passwords

Enter passwords from the Main Menu:

• Enter Password, links to the Entry screen, which is aneditable screen So pressing the wheel goes to the editmode where the password (5321) can be entered. Thefirst (*) will be highlighted, rotate the wheel clockwiseto the first number and set it by pressing the wheel.Repeat for the remaining three numbers. The passwordwill time out after 10 minutes, and is cancelled if a newpassword is entered or the control powers down.

•Not entering a password allows access to a limited num-ber of parameters (with asterisks) as shown in Figure 68.

Figure 66: Password Menu

Figure 67: Password Entry Page

Entering an invalid password has the same effect as not entering a password.

Once a valid password has been entered, the controller allows further changes and access without requiring the user to enter a password until either the password timer expires or a different password is entered. The default value for this password timer is 10 minutes.

Navigation Mode

When the navigation wheel is turned clockwise, the cursor moves to the next line (down) on the page. When the wheel is turned counter-clockwise the cursor moves to the previous line (up) on the page. The faster the wheel is turned the faster the cursor moves. Pushing the wheel acts as an “Enter” button.

Three types of lines exist:

• Menu title, displayed in the first line as in Figure 67.

• Link (also called Jump) having an arrow ( > ) in the rightof the line and used to link to the next menu.

• Parameters with a value or adjustable setpoint.

For example, “Time Until Restart” jumps from level 1 to level 2 and stops there.

When the Back Button is pressed the display reverts back to the previously displayed page. If the Back button is repeatedly pressed the display continues to revert one page back along the current navigation path until the “main menu” is reached.

When the Menu (Home) Button is pressed the display reverts to the “main page.”

When the Alarm Button is depressed, the Alarm Lists menu is displayed.

Edit Mode

The Editing Mode is entered by pressing the navigation wheel while the cursor is pointing to a line containing an editable field. Once in the edit mode pressing the wheel again causes the editable field to be highlighted. Turning the wheel clockwise while the editable field is highlighted causes the value to be increased. Turning the wheel counter-clockwise while the editable field is highlighted causes the value to be decreased. The faster the wheel is turned the faster the value is increased or decreased. Pressing the wheel again cause the new value to be saved and the keypad/display to leave the edit mode and return to the navigation mode.

A parameter with an “R” is read only; it is giving a value or description of a condition. An “R/W indicates a read and/or write opportunity; a value can be read or changed (providing the proper password has been entered).

Example 1: Check Status, for example -is the unit being controlled locally or by an external network? We are looking for the Unit Control Source Since this a unit status parameter, start at Main Menu and select View/Set Unit and press the wheel to jump to the next set of menus. There will be an arrow at the right side of the box, indicating that a jump to the next level is required. Press the wheel to execute the jump.

You will arrive at the Status/ Settings link. There is an arrow indicating that this line is a link to a further menu. Press the wheel again to jump to the next menu, Unit Status/Settings.

Rotate the wheel to scroll down to Control Source and read the result.

Main Menu 1/3Enter Password >Unit StatusOff: Unit SwACTIVE SETPT 44.6°F

Enter Password 1/1Enter PW ****

118 IOM 1202


Example 2: Change a Setpoint, the chilled water setpoint for example. This parameter is designated as Cool LWT 1 setpoint and is a unit parameter. From the Main Menu select View/Set Unit. The arrow indicated that this is link to a further menu.

Press the wheel and jump to the next menu View/Set Unit and use the wheel to scroll down to Temperatures. This again has an arrow and is a link to a further menu. Press the wheel and jump to the Temperatures menu, which contains temperatures values and setpoints. The first line is Evap LWT, rotate wheel until Cool LWT 1 is highlighted. Press the wheel to enter edit

mode. Rotate wheel until new setpoint is reached, then press wheel to accept the new value and exit edit mode.

Example 3: Clear an Alarm, from the Main Menu scroll down to the Alarms line. Note the arrow indicating this line is a link. Press the wheel to jump to the next menu Alarms There are two lines here; Alarm Active and Alarm Log. Alarms are cleared from the Active Alarm link. Press the wheel to jump to the next screen. With the first line highlighted, press the wheel to enter edit mode. Rotate wheel until AlmClr is set to On, then press wheel to clear the alarms.

IOM 1202 119


Figure 68: HMI Keypad Navigation

Visable (w/o Password)

Menu Level 1 Menu Level 2 Menu Level 3

Enter Password Enter PasswordUnit Status RActive Setpoint R Enter PW R/WEvap Leaving W ater Temp RUnit Capacity RUnit Mode R

Alarms AlarmsScheduled Maintenance Alarm Active Alarm ActiveAbout This Chiller Alarm Log Active Alarm/W arning 1 R

… RNext Maintenance Active Alarm/W arning n RNext Maintenance Month/Year R Acknowledge All R/WService Support Reference R

Alarm LogAbout This Chiller Alarm Entry 1 RModel Number R … RG. O. Number R Alarm Entry 25 RUnit Serial Number RStarter Model Number(s)Starter Serial Number(s)

BSP Version R Starter Model NumbersApplication Version R Circuit #1 R/WHMI GUID R Circuit #2 R/WOBH GUID R Circuit #3 R/W

Circuit #4 R/W

Starter Serial NumbersCircuit #1 R/WCircuit #2 R/WCircuit #3 R/WCircuit #4 R/W

View/Set Circuit View/Set Circuit

Unit Status R Circuit #1 View/Set Cir1

Active Setpoint R Circuit #2 Data

Evap Leaving W ater Temp R Circuit #3 Status/Settings

Evap Entering Water Temp R Circuit #4 Compressor

Unit Mode R Condenser

EXV

Configuration

Calibrate Sensors

Menu Level 4 Menu Level 5

Cir1 StatusCircuit Status R Circuit StatusCircuit Mode R/W Circuit #1 Status RCircuit Capacity R Circuit #2 Status RService Pumpdown R/W Circuit #3 Status R

Circuit #4 Status R

120 IOM 1202

Optional Remote User Interface
The optional remote user interface is a remote control panel that mimics operation of the controller located on the unit. Up to eight Pathfinder units can be connected to it and selected on the screen. It provides HMI (Human Machine Interface) within a building, the building engineer’s office for example, without going outdoors to the unit.

It can be ordered with the unit and shipped loose as a field installed option. It can also be ordered anytime after chiller shipment and mounted and wired on the job as explained on the following page. The remote panel is powered from the unit and no additional power supply is required.

All viewing and setpoint adjustments available on the unit controller are available on the remote panel. Navigation is identical to the unit controller as described in this manual.

The initial screen when the remote is turned on shows the units connected to it. Highlight the desired unit and press the wheel to access it. The remote will automatically show the units attached to it, no initial entry is required.

Figure 69: Remote User Interface Layout

IOM 1202 121


122 IOM 1202

Optional Compressor VFD
An optional variable frequency drive (VFD) for each unit compressor provides compressor speed reduction to the extent permissible by chiller load and discharge pressure requirements. The speed reduction provides significant energy savings over fixed-speed compressors.

The VFD has its own microprocessor controller that monitors VFD operation, provides safety shutdowns and sends data to the chiller controller.

VFD alarms and faults are handled the same as chiller related faults. See page 110 for information on viewing and clearing them.

! WARNING

Faults and Minor Faults/Alarms

When the drive detects a fault:

• The VFD sends a message to the chiller controllerregarding the fault

• The chiller controller displays a hexadecimal numbercode that identifies the specific VFD fault. Table 77 liststhe fault codes.

• An alarm bell icon will be displayed in the upperright-hand corner of all controller screens including theoptional remote user interface panel’s screens.

• The remote alarm circuit will be energized (wiring to aremote alarm device is optional)

• The drive output is interrupted and the compressorcoasts to a stop.

• The drive is inoperable until the fault is corrected.

When the drive detects an alarm or minor fault:

• No message is sent to the chiller controller since nooperator action is required.

• The drive continues running the compressor.

Clearing VFD Faults

VFD faults are cleared in the same manor as any chiller unit fault. See page page 110 for instructions.

Navigating VFD Fault Codes

When a VFD fault condition is detected, the VFD hexadecimal fault code will appear on the chiller controller display (HMI) as a hexadecimal code, for example; 0002H. The faults that can be corrected by the operator without accessing the VFD interior are listed in Table 77. Note the fault code and contact the service group for Daikin Applied if unsuccessful in clearing the listed faults or for assistance with unlisted faults.

Table 77: Fault Code, Causes and Possible Solutions

Table continued on next page.

Access to the VFD enclosure is by factory-trained technicians only. Unauthorized entry can result in property damage, severe personal injury, or death.

Hexa-decimal CodeVFD HMI Display

Fault Name,Cause

Possible Solutions

0083H CPF02 A/D Conversion Error Cycle power to drive (Note 1)0095H CPF20,CPF21 Control Circuit Error Cycle power to drive (Note 1)0097 CPF22 Hybrid IC Error Cycle power to drive (Note 1)0019H dEv Speed Deviation Reduce compressor load001FH Err EEPROM Write Error Cycle power to drive (Note 1)

0007H oC Overcurrent

Measure the current going to the compressor. Determine if there is a sudden fluctuation in current. Reduce load

0106H to0107H oFA03 to oFA06 Option Card Error Cycle power to drive (Note 1)0111H, 0112H oFA10, oFA11 Option Card Error Cycle power to drive (Note 1)0131H to 0139H oFA30 to oFA43 Option Card Error Cycle power to drive (Note 1)0205H to 0211H oFb03 to oFb11 Option Card Error Cycle power to drive (Note 1)0212H to0217H oFb12 to oFb17 Option Card Error Cycle power to drive (Note 1)0231H to 0239H,023AH to 023EH

oFb30 to oFb43 Option Card Error Cycle power to drive (Note 1)

0305H,0306H oFC05, oFC06 Option Card Error Cycle power to drive (Note 1)

0009H oH Heatsink OverheatVerify ambient temperature within specification. Remove any adjacent heat producing equipment.Decrease load

IOM 1202 123


Note

Depending on the fault type, the fault will shut down the circuit or entire unit.

If a circuit is still running and on its own disconnect, it can be left running. Disconnect and then reconnect the faulted circuit.

If a circuit is still running and there is a common disconnect for the unit, pump down the running circuit, disconnect and reconnect the entire unit.

Table 78: Setpoint Changes between VFD and Non-VFD Units

Hexa-decimal CodeVFD HMI Display

Fault Name,Cause

Possible Solutions

000AH oH1 Heatsink OverheatVerify ambient temperature within specificationRemove any adjacent heat producing equipmentDecrease load

000BH oL1MotorOverload

Reduce loadCheck for power supply phase loss/fluctuation Check motor current against nameplate

000CH oL2DriveOverload

Reduce loadCheck for power supply phase loss/fluctuation

0008H ovOvervoltageDC Bus

Check motor wiring for ground faultsCheck input voltage

000FH rrBraking TransistorFailed

Cycle power to drive (Note 1)

0002H Uv1DC BusUndervoltage

Check for loose power connectionsCheck supply voltageCycle power to drive (Note 1)

0003F Uv2 Control Power Fault Cycle power to drive (Note 1)

0004H Uv3Bypass Circuit Undervoltage

Cycle power to drive (Note 1)

Setpoint VFD Units Non-VFD UnitsLight Load Stage Down Default 35 Default 40Stop Delta T Default 1.5 Default 0.7Stage Up Delta T Default 0.5 Default 1.0PVM Config Default None Default Single PointSlide Position Sensor Default No Default Yes

124 IOM 1202


Table 79: Logic Changes

Logic VFD Units Non-VFD Units

Requirements for staging a circuit on are different

If a calculated limit for pulldown rate is exceeded when LWT error is less than 10°C, no additional circuit can start.

Has the logic outlined in original SRS, without the additional logic shown at left for VFD chillers.

Method for generating load/unloadcommands is different.

A scaled limit on pulldown rate is used in combination with a scaled time delay between capacitychanges based on LWT error.

An error accumulator using LWT error and loop pulldown rate are used. Time between capacity changes isdetermined by accumulator reaching limit and the time delays in individual circuits.

Pressure control target is different

Always controls to 350 kPa other than after transition from SSH control

Allows pressure target to vary in order to maintain DSH (12 to 22 °C)

Limits of SSH target are different

SSH target varies from 3.4 to 7.0 °C (as DSH varies from 18 to 12 °C)

SSH target varies from 2.8 to 5.5 °C (as DSH varies from 17 to 12 °C)

Triggers for transition from pressure control to SSH control are different.

Circuit running for 3 minutes and DSH >= 12 deg C for 1 minute or SSH < SSH target plus 1 degree C.

Low Pressure Unload not active and LWT <= 15.5°c and SSH >= SSH target and DSH >= 12°C for at least 3 minutes

Triggers for transition from SSH control to pressure control are different.

Evap Pressure > 350 kPa for 60 seconds

LWT > 17°C or DSH < 12°C

IOM 1202 125


Control Panel

The control panel for VFD units is different from non-VFD units due to the space requirements of the drive. See figures below for component layout.

Figure 70: Upper Section of the VFD Control Panel Section

Fan Contactors & OverloadsCircuit #2

Figure 71: Lower Section of the VF Control Panel Section

126 IOM 1202

Optional Power Factor Correction Capacitors
Optional Power Factor Correction Capacitors
Optional power factor correction capacitors (PFCC) located in an electrical panel may have been ordered with the chiller. If so, there is one panel per compressor and they are mounted on the side base rail near the evaporator.

The panel has no moving parts and no routine maintenance is required. There is a fuse for each phase, each with a blown fuse indicator and associated red indicating light.

A fuse failure will cause a phase fault and the unit will experience a rapid shutdown from the Phase-Voltage Monitor for wye-delta starters or internally within solid state starters. Units with compressor VFDs will not normally have PFCCs.

Before replacing the fuse, the cause for failure must be determined and corrected. The chiller will not run with a blown circuit fuse.

! WARNINGDisconnect power from the unit before opening the capacitor panel. After disconnecting, allow ten minutes for capacitor to discharge and check for no capacitor voltage with a voltmeter before attempting any service work.Failure to do so can result in property damage, severe personal injury, or death.

Figure 72: Power Factor Correction Capacitor Panel Layout

IOM 1202 127

Start-up and Shutdown
NOTICE

Daikin Applied service personnel or factory authorized service agency must perform initial start-up in order to activate warranty.

! CAUTIONMost relays and terminals in the unit control center are powered when S1 is closed and the control circuit disconnect is on. Therefore, do not close S1 until ready for start-up or the unit may start unintentionally and possibly cause equipment damage.

Seasonal Start-up1 Double check that the discharge shutoff valve and the

optional compressor suction butterfly valves are open.

2 Check that the manual liquid-line shutoff valves at the outlet of the subcooler coils and the oil separator oil return line shutoff valves are open.

3 Check the leaving chilled water temperature setpoint on the MicroTech III controller to be sure it is set at the desired chilled water temperature.

4 Start the auxiliary equipment for the installation by turning on the time clock, and/or remote on/off switch, and chilled water pump.

5 Check to see that pumpdown switches Q1 and Q2 (and Q3) are in the "Pumpdown and Stop" (open) position. Throw the S1 switch to the "auto" position.

6 Under the "Control Mode" menu of the keypad, place the unit into the automatic cool mode.

7 Start the system by moving pumpdown switch Q1 to the "auto" position.

8 Repeat step 7 for Q2 (and Q3).

Temporary Shutdown

Move pumpdown switches Q1 and Q2 to the "Pumpdown and Stop" position. After the compressors have pumped down, turn off the chilled water pump.

! CAUTIONDo not turn the unit off using the "Override Stop" switch, without first moving Q1 and Q2 (and Q3) to the "Stop" position, unless it is an emergency, as this will prevent the unit from going through a proper shutdown/pumpdown sequence, resulting in possible equipment damage.

! CAUTIONThe unit has a one-time pumpdown operation. When Q1 and Q2 are in the "Pumpdown and Stop" position the unit will pump down once and not run again until the Q1 and Q2 switches are moved to the auto position. If Q1 and Q2 are in the auto position and the load has been satisfied, the unit will go into one-time pumpdown and will remain off until the MicroTech III control senses a call for cooling and starts the unit.

! CAUTIONWater flow to the unit must not be interrupted before the compressors pump down to avoid freeze-up in the evaporator. Interruption will cause equipment damage.

! CAUTIONIf all power to the unit is turned off, the compressor heaters will become inoperable. Once power is resumed to the unit, the compressor and oil separator heaters must be energized a minimum of 12 hours before attempting to start the unit. Failure to do so can damage the compressors due to excessive accumulation of liquid in the compressor.

Start-up After Temporary Shutdown1 Insure that the compressor and oil separator heaters have

been energized for at least 12 hours prior to starting the unit.

2 Start the chilled water pump.

3 With System switch Q0 in the "on" position, move pumpdown switches Q1 and Q2 to the "auto" position.

4 Observe the unit operation until the system has stabilized.

Extended (Seasonal) Shutdown1 Move the Q1 and Q2 (and Q3) switches to the manual

pumpdown position.

2 After the compressors have pumped down, turn off the chilled water pump.

3 Turn off all power to the unit and to the chilled water pump.

4 If fluid is left in the evaporator, confirm that the evaporator heaters are operational.

5 Move the emergency stop switch S1 to the "off" position.

6 Close the compressor discharge valve and the optional compressor suction valve (if so equipped) as well as the liquid line shutoff valves.

128 IOM 1202


7 Tag all opened compressor disconnect switches to warn against start-up before opening the compressor suction valve and liquid line shutoff valves.

8 If glycol is not used in the system, drain all water from the unit evaporator and chilled water piping if the unit is to be shutdown during winter and temperatures below -20°F can be expected. The evaporator is equipped with heaters to help protect it down to -20°F. Chilled water piping must be protected with field-installed protection. Do not leave the vessels or piping open to the atmosphere over the shutdown period.

9 Do not apply power to the evaporator heaters if the system is drained of fluids as this can cause the heaters to burn out.

Start-up After Extended (Seasonal) Shut-down

1 With all electrical disconnects locked and tagged out, check all screw or lug-type electrical connections to be sure they are tight for good electrical contact.

! DANGERLOCK AND TAG OUT ALL POWER SOURCES WHEN CHECKING CONNECTIONS. ELECTRICAL SHOCK WILL CAUSE SEVERE PERSONAL INJURY OR DEATH.

2 Check the voltage of the unit power supply and see that it is within the ±10% tolerance that is allowed. Voltage unbalance between phases must be within ±3%.

3 See that all auxiliary control equipment is operative and that an adequate cooling load is available for start-up.

4 Check all compressor flange connections for tightness to avoid refrigerant loss. Always replace valve seal caps.

5 Make sure system switch Q0 is in the "Stop" position and pumpdown switches Q1 and Q2 are set to "Pumpdown and Stop", throw the main power and control disconnect switches to "on." This will energize the crankcase heaters. Wait a minimum of 12 hours before starting up unit. Turn compressor circuit breakers to "off" position until ready to start unit.

6 Open the optional compressor suction butterfly as well as the liquid line shutoff valves, compressor discharge valves.

7 Vent the air from the evaporator water side as well as from the system piping. Open all water flow valves and start the chilled water pump. Check all piping for leaks and recheck for air in the system. Verify the correct flow rate by taking the pressure drop across the evaporator and checking the pressure drop curves in the installation manual, IM 997.

The following table gives glycol concentrations required for freeze protection.

Table 80: Freeze Protection

Notes:

1 These figures are examples only and cannot be appropriate to every situation. Generally, for an extended margin of protection, select a temperature at least 10°F lower than the expected lowest ambient

temperature. Inhibitor levels should be adjusted for solutions less than 25% glycol.

2 Glycol of less than 25% concentration is not recommended because of the potential for bacterial growth and loss of heat transfer efficiency.

Temperature

°F (?C)

Percent Volume Glycol Concentration RequiredFor Freeze Protection For Burst Protection

Ethylene Glycol

Propylene Glycol

Ethylene Glycol

Propylene Glycol

20 (6.7) 16 18 11 1210 (-12.2) 25 29 17 200 (-17.8) 33 36 22 24

-10 (-23.3) 39 42 26 28-20 (-28.9) 44 46 30 30-30 (-34.4) 48 50 30 33-40 (-40.0) 52 54 30 35-50 (-45.6) 56 57 30 35-60 (-51.1) 60 60 30 35

IOM 1202 129

System Maintenance
System Maintenance
General

On initial start-up and periodically during operation, it will be necessary to perform certain routine service checks. Among these are checking the liquid line sight glasses, and the compressor oil level sight glass. In addition, check the MicroTech III controller temperature and pressure readings with gauges and thermometers to see that the unit has normal condensing and suction pressure and superheat and subcooling readings. A recommended maintenance schedule is located at the end of this section.

A Periodic Maintenance Log is located at the end of this manual. It is suggested that the log be copied and a report be completed on a regular basis. The log will serve as a useful tool for a service technician in the event service is required.

Initial start-up date, vibration readings, compressor megger readings and oil analysis information should be kept for reference base-line data.

Compressor Maintenance

The semi-hermetic compressor requires no yearly scheduled maintenance. Compressor vibration is an indicator of a possible problem requiring maintenance. It is recommended that the compressor be checked with a vibration analyzer at, or shortly after, start-up and again on an annual basis. The load should be maintained as closely as possible to the load of the original test. The initial vibration analyzer test provides a benchmark of the compressor, and when performed routinely, can give a warning of impending problems.

Lubrication

No routine lubrication is required on Pathfinder units. The fan motor bearings are permanently lubricated. No further lubrication is required. Excessive fan motor bearing noise is an indication of a potential bearing failure.

Compressor oil must be ICI RL68HB, Daikin Part Number 735030446 in a 1-gallon container. This is synthetic polyolester oil with anti-wear additives and is highly hygroscopic. Care must be taken to minimize exposure of the oil to air when charging oil into the system.

The oil charge is 6 gallons (23 liters) for all compressor sizes.

The compressor oil heater is 250 watts and is on when the compressor is off and off when it is on.

! WARNINGPOE lubricants must be handled carefully and the proper protective equipment (gloves, eye protection, etc.) must be used when handling POE lubricant. POE must not come into contact with any surface or material that might be harmed by POE, including certain polymers (e.g. PVC/CPVC and polycarbonate piping).

Oil Filter Removal and Renewal

Prior to this procedure, pump out the compressor; isolate the electrical supply to the control panels and compressor motor terminal.

! WARNINGAfter the compressor has been pumped down and isolated, the oil contained inside the filter housing will remain hot enough to cause burns for some time afterwards. Always allow sufficient time for the oil to cool down so that it is cool enough not to be a danger when drained off (less than 35 °C is recommended). Severe injury from burns can result.

1 Oil Filter - 250mm2 Oil Filter Housing

3 O-Ring – 89.5x34 O-Ring – 76.1x3.45 M8 Bolts

130 IOM 1202

System Maintenance

• Unscrew and remove two hex head side cover bolts 180°apart. Insert M8 guide studs into the vacant holes.

• Remove remaining bolts, remove oil filter housingcover.

• Pull the oil filter off of the spigot and withdraw the oilfilter from the housing and clean.

• Clean oil filter housing cover plate.

Fitting a New Oil Filter Element – Reassembly

Before assembly commences, remove any paint from joint faces. Inspect parts individually for damage, ensure they are completely clean before laying them out on a sheet of clean paper in a logical order ready for reassembly.

Use fresh refrigerant oil to lubricate parts during reassembly. New O-rings must be used.

• Insert new oil filter into the housing, ensuring the filtersits tightly on the sealing spigot.

• Replace the oil filter housing cover

Filter housing cover plate – 6xM8 Bolts

Removal of the filter housing cover

Remove filter and clean oil filter housing. Clean all other components. Replace the o-rings.

Electrical Terminals

! DANGERElectric equipment can cause electric shock which will cause severe personal injury or death. Turn off, lock out and tag all power before continuing with following service. Panels can have more than one power source.

! CAUTIONPeriodically check electrical terminals for tightness and tighten as required. Always use a back-up wrench when tightening electrical terminals.

Condensers

The condensers are air-cooled and constructed of 3/8" (9.5mm) OD internally finned copper tubes bonded in a staggered pattern into louvered aluminum fins. No maintenance is ordinarily required except the routine removal of dirt and debris from the outside surface of the fins. Daikin Applied recommends the use of non-caustic, non-acidic, foaming coil cleaners available at most air conditioning supply outlets. Flush the coil from the inside out.

! WARNINGUse caution when applying coil cleaners. They can contain potentially harmful chemicals. Wear breathing apparatus and protective clothing. Carefully follow the cleaner manufacturer’s MSDS sheets. Thoroughly rinse all surfaces to remove any cleaner residue. Do not damage the fins during cleaning.

IOM 1202 131

System Maintenance

If the service technician has reason to believe that the refrigerant circuit contains noncondensables, recovery of the noncondensables will be required, strictly following Clean Air Act regulations governing refrigerant discharge to the atmosphere. The service Schrader valves are located on both vertical coil headers on both sides of the unit at the control box end of the coil. Access panels are located at the end of the


condenser coil directly behind the control panel. Recover thenoncondensables with the unit off, after shutdown of 15 minutes or longer, to allow air to collect at the top of the coil. Restart and run the unit for a brief period. If necessary, shut the unit off and repeat the procedure. Follow accepted environmentally sound practices when removing refrigerant from the unit.

Table 81:

Liquid Line Sight Glass

Observe the refrigerant sight glasses weekly. A clear glass of liquid indicates that there is adequate refrigerant charge in the system to provide proper feed through the expansion valve.

Bubbling refrigerant in the sight glass, during stable run conditions, may indicate that there can be an electronic expansion valve (EXV) problem since the EXV regulates liquid subcooling. Refrigerant gas flashing in the sight glass could also indicate an excessive pressure drop in the liquid line, possibly due to a clogged filter-drier or a restriction elsewhere in the liquid line.

An element inside the sight glass indicates the moisture condition corresponding to a given element color. If the sight glass does not indicate a dry condition after about 12 hours of operation, the circuit should be pumped down and the filter-drier changed. An oil acid test is also recommended.

Do not use the sight glass on the EXV body for refrigerant charging. Its purpose is to view the position of the valve.

Lead-Lag

A feature on all Daikin Pathfinder air-cooled chillers is a system for alternating the sequence in which the

compressors start to balance the number of starts and run hours. Lead-Lag of the refrigerant circuits is accomplished automatically through the MicroTech III controller. When in the auto mode, the circuit with the fewest number of starts will be started first. If all circuits are operating and a stage down in the number of operating compressors is required, the circuit with the most operating hours will cycle off first. The operator can override the MicroTech III controller, and manually select the lead circuit as circuit #1, #2 or #3.

Pump Operation

It is highly recommended that the chiller unit control the chilled water pump(s). The integral chiller control system has the capability to selectively start pump A or B or automatically alternate pump selection at each start and also has pump standby operation capability.

Failure to have the chiller control the pumps may cause the following problems:

1 If any device, other than the chiller, should try to start the chiller without first starting the pumps, the chiller will lock out on the no-flow alarm and require a manual reset to restart. This can be disruptive to the normal cooling process.

Inspection Area Inspection Points Corrective Action

General

Inspect equipment for discoloration from overheating or deterioration.

Replace damaged equipment as required.

Inspect for dirt, foreign particles, or dust collection on components

Inspect door seal if so equipped.Use dry air to clear foreign matter

Conductors and WiringInspect wiring and connections for discoloration, damage or heat stress.

Repair or replace damaged wire.

TerminalsInspect terminals for loose, stripped, or damaged connections

Tighten loose screws and replace damaged screws or terminals.

Relays and Contactors

Inspect contactors and relay for excessive noise during operation

Check coil voltage for over or under voltage condition.

Inspect coils for signs of overheating such as melted or cracked insulation.

Replace damaged removable relays, contactors or circuit board.

132 IOM 1202

System Maintenance

2 In areas where freeze-up is a concern, the chiller control senses the chilled water temperature and turns on an immersion heater in the evaporator. It also signals the chilled water pump to start to providing flow through the evaporator and additional protection against evaporator and outside pipe freeze-up . Other pump starting methods will not automatically provide this protection. Note: the owner/operator must be aware that when the water temperature falls below freezing temperatures it is imperative NOT to stop the pump(s) as immediate freeze-up can occur.

This method of freeze protection is only effective as long as the facility and the chiller have power. The only positive freeze protection during power failures is to drain the evaporator and blow out each tube or add the appropriate concentration of glycol to the system.

Figure 73: Preventative Maintenance Schedule

Note: :

1 Monthly operations include all weekly operations.

2 Annual (or spring start-up) operations include all weekly and monthly operations.

3 Log readings can be taken daily for a higher level of unit observation.

4 Coil cleaning can be required more frequently in areas with a high level of airborne particles.

5 Be sure fan motors are electrically locked out.

6 Replace the filter if pressure drop exceeds 20 psi.

7 The weekly fan filter cleaning schedule can be modified to meet job conditions. It is important that the filter allows full air flow.

OPERATION WEEKLYMONTHLY

(Note 1)ANNUAL (Note 2)

General Complete unit log and review (Note 3) X Inspect unit for loose or damaged components and visible leaks X Inspect thermal insulation for integrity X Clean and paint as required X

Electrical ( * including the optional VFD) Sequence test controls * X Check contactors for pitting, replace as required * X Check terminals for tightness, tighten as necessary * X Clean control panel interior * X Clean control box fan filter (Note 7 ) * X Visually inspect components for signs of overheating * X Verify compressor and oil heater operation X Megger compressor motor X

Refrigeration/Lubricant Leak test X Check liquid line sight glasses for clear flow X Check compressor oil sight glass for correct level (lubricant charge) X Check filter-drier pressure drop (see manual for spec) X Check lubricant filter pressure drop (Note 6) X Perform compressor vibration test X Perform oil analysis test on compressor oil X

Condenser (air-cooled) Clean condenser coils (Note 4) X Check fan blades for tightness on shaft (Note 5) X Check fans for loose rivets and cracks, check motor brackets X Check coil fins for damage and straighten as necessary X

IOM 1202 133

Appendix
Appendix
Definitions

Active Setpoint

The active setpoint is the setting in effect at any given moment. This variation occurs on setpoints that can be altered during normal operation. Resetting the chilled water leaving temperature setpoint by one of several methods, such as return water temperature, is an example.

Active Capacity Limit

The active setpoint is the setting in effect at any given moment. Any one of several external inputs can limit a compressor’s capacity below its maximum value.

Condenser Saturated Temperature Target

The saturated condenser temperature target is calculated by first using the following equation:

Sat condenser temp target raw = 0.833(evaporator sat temp) + 68.34

The “raw” value is the initial calculated value. This value is then limited to a range defined by the Condenser Saturated Temperature Target minimum and maximum setpoints. These setpoints simply cut off the value to a working range, and this range can be limited to a single value if the two setpoints are set to the same value.

Dead Band

The dead band is a range of values surrounding a setpoint such that a change in the variable occurring within the dead band range causes no action from the controller. For example, if a temperature setpoint is 44°F and it has a dead band of ± 2 degrees F, nothing will happen until the measured temperature is less than 42°F or more than 46°F.

DIN

Digital input, usually followed by a number designating the number of the input.

Error

In the context of this manual, “Error” is the difference between the actual value of a variable and the target setting or setpoint.

Evaporator Approach

The evaporator approach is calculated for each circuit. The equation is as follows:

Evaporator Approach = LWT – Evaporator Saturated Temperature

See page 38 for more details

Evap Recirc Timer

A timing function, with a 30-second default, that holds off any reading of chilled water for the duration of the timing setting. This delay allows the chilled water sensors (especially water temperatures) to take a more accurate reading of the chilled water system conditions.

EXV

Electronic expansion valve, used to control the flow of refrigerant to the evaporator, controlled by the circuit microprocessor.

High Saturated Condenser – Hold Value

High Cond Hold Value = Max Saturated Condenser Value – 5 degrees F

This function prevents the compressor from loading whenever the pressure approaches within 5 degrees of the maximum discharge pressure. The purpose is to keep the compressor online during periods of possibly temporary elevated pressures.

High Saturated Condenser – Unload Value

High Cond Unload Value = Max Saturated Condenser Value – 3 degrees F

This function unloads the compressor whenever the pressure approaches within 3 degrees of the maximum discharge pressure. The purpose is to keep the compressor online during periods of possibly temporary elevated pressures.

Light Load Stg Dn Point

The percent load point at which one of two operating compressors will shut off, transferring the unit load to the remaining compressor.

Load Limit

An external signal from the keypad, the BAS or a 4-20 ma signal that limits the compressor loading to a designated percent of full load. Frequently used to limit unit power input.

Load Balance

Load balance is a technique that equally distributes the total unit load among the running compressors on a unit or group of units.

Low Ambient Lockout

Prevents the unit from operating (or starting) at ambient temperatures below the setpoint.

Low Pressure Unload Setpoint

The psi evaporator pressure setting at which the controller will unload the compressor until a preset pressure is reached.

134 IOM 1202

Appendix

Low Pressure Hold Setpoint

The psi evaporator pressure setting at which the controller will not allow further compressor loading.

Low/High Superheat Error

The difference between actual evaporator superheat and the superheat target.

LWT

Leaving water temperature. The “water” is any fluid used in the chiller circuit.

LWT Error

Error in the controller context is the difference between the value of a variable and the setpoint. For example, if the LWT setpoint is 44°F and the actual temperature of the water at a given moment is 46°F, the LWT error is +2 degrees.

LWT Slope

The LWT slope is an indication of the trend of the water temperature. It is calculated by taking readings of the temperature every few seconds and subtracting them from the previous value, over a rolling one minute interval.

ms

Milli-second

Maximum Saturated Condenser Temperature

The maximum saturated condenser temperature allowed is calculated based on the compressor operational envelope.

OAT

Outside ambient air temperature

Offset

Offset is the difference between the actual value of a variable (such as temperature or pressure) and the reading shown on the microprocessor as a result of the sensor signal.

pLAN

Peco Local Area Network is the proprietary name of the network connecting the control elements.

Refrigerant Saturated Temperature

Refrigerant saturated temperature is calculated from the pressure sensor readings for each circuit. The pressure is fitted to an R-134a temperature/pressure curve to determine the saturated temperature.

Soft Load

Soft Loading is a configurable function used to ramp up the unit capacity over a given time period, usually used to influence building electrical demand by gradually loading the unit.

SP

Setpoint

SSS

Solid state starter as used on Daikin screw

compressors.

Suction Superheat

Suction superheat is calculated for each circuit using the following equation:

Suction Superheat = Suction Temperature – Evaporator Saturated Temperature

See page 38 for details.

Stage Up/Down Accumulator

The accumulator can be thought of as a bank storing occurrences that indicate the need for an additional fan.

Stageup/Stagedown Delta-T

Staging is the act of starting or stopping a compressor or fan when another is still operating. Startup and Stop is the act of starting the first compressor or fan and stopping the last compressor or fan. The Delta-T is the “dead band” on either side of the setpoint in which no action is taken.

Stage Up Delay

The time delay from the start of the first compressor to the start of the second.

Startup Delta-T

Number of degrees above the LWT setpoint required to start the first compressor.

Stop Delta-T

Number of degrees below the LWT setpoint required for the last compressor to stop.

VDC

Volts, Direct current, sometimes noted as vdc.

IOM 1202 135

Appendix

136 IOM 1202

© 2013 Daikin Applied • www.DaikinApplied.com • 800-432-1342 IOM 1202 6/13

Daikin Applied Training and Development

Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high priority. For training information, please visit us at www.DaikinApplied.com/training, or call 540-248-9201 to speak to the Training Department.

Warranty

All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product Warranty. Consult your local Daikin Applied Representative for warranty details. To find your local Daikin Applied Representative, go to www.DaikinApplied.com.

This document contains the most current product information as of this printing. For the most up-to-date product information, please go to www.DaikinApplied.com.

http://www.daikinmcquay.com/training



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