instructions models: qw242d qw302d qw361d qw421d …

QW SERIESWATER SOURCEPACKAGED HEAT PUMPINSTALLATION

INSTRUCTIONS Models:QW242D QW302DQW361D QW421DQW481D QW601D

© Copyright 2002

Manual No.: 2100-418Supersedes:File: Vol II Tab 14Date: 11-05-02

Bard Manufacturing CompanyBryan, Ohio 43506Since 1914...Moving ahead, just as planned.

Earth Loop FluidTemperatures 25 – 110

Ground Water Temperature 45 – 75

MIS-1554

CONTENTS

i

Closed Loop (Earth Coupled Ground Loop Applications)

Circulation System Design .................................... 33Copper Water Coil Application .............................. 33Start Up Procedure for Closed Loop System......... 34

Open Loop (Well System Applications)Water Connections ................................................ 36Copper Water Coil Limitations ............................... 36Well Pump Sizing .................................................. 37Start Up Procedure for Open Loop System ........... 37Water Corrosion .................................................... 38Remedies of Water Problems ................................ 38Lake and Pond Installations .................................. 39Cooling Tower / Boiler Application ......................... 41

ServiceService Hints ......................................................... 42Un-brazing System Components ........................... 42

Troubleshooting ECM Blower Motors ........... 43 - 44

Quick Referance Troupbleshooting Chart forWater to Air Heat Pump ......................................... 45

Ground Source Heat PumpPerformance Report ........................................ 46 - 47

Getting Other Information and PublicationsFor more information, contact these publishers: ..... 1

QW General InformationQW Model Nomenclature ........................................ 2Shipping Damage .................................................... 4Unit Removal From Skid .......................................... 4Handling Unit After Removal From Skid .................. 4Removal of Wall Bracket from Shipping Location ... 5General .................................................................... 5Minimum Installation Height .................................... 5Duct Work ................................................................ 8Filters ....................................................................... 8Condensate Drain .................................................... 8Mist Eleminator Service ......................................... 10

Installation InstructionsMounting the Unit .................................................. 13Wiring – Main Power ............................................. 16Wiring – Low Voltage Wiring ................................. 16Low Voltage Connections ...................................... 17

Start UpDescription of Standard Equipment ....................... 22Compressor Control Module .................................. 22Adjustments ........................................................... 22Optional CFM ........................................................ 23Important Installer Note ......................................... 23Phase Monitor ....................................................... 23Service Hints ......................................................... 23Sequence of Operation .......................................... 23Optional Climate Controls Sequence ofOperation ............................................................... 24Refrigerant Tube Schematic for Reheat Coil ......... 25Pressure Service Ports .......................................... 25Pressure Tables ................................................ 30-31Optional Accessories ............................................. 32

FiguresFigure 1 Unit Dimensions ..................................... 3Figure 2 Removal of Unit From Skid .................... 4Figure 3 Proper Handling of Unit After Removal

from Skid ................................................ 5Figure 4 Installation of Unit w/Wall Sleeve .......... 6Figure 5 Installation With Free Blow Plenum ....... 7Figure 6 Ducted Application ................................. 7Figure 7 Supply Duct Connections ...................... 8Figure 8 Condensate Drain .................................. 9Figure 8A Side Drain (Side View) ........................... 9Figure 8B Optional Rear Drain ............................... 9Figure 8C Rear Drain (Top View) .......................... 10Figure 9 Fresh Air Damper Removal .................. 11Figure 10 Removal of QTEC ERV ......................... 12Figure 11 Remove Locking Screws from Wheels 13Figure 12 Unit Mounting Without Wall Sleeve ..... 14Figure 13 Component Location ............................ 15Figure 14 Low Voltage Wire Harness Plug .......... 17Figure 15 Remote Thermostat Wiring "X" Option 18Figure 16 Remote Thermostat Wiring "E" Option 19Figure 17 Remote Thermostat Wiring "F" Option 20Figure 18 Remote Thermostat Wiring "G" Option 21Figure 19 Heat Pump Dehumidification Mode

Circuit Diagram .................................... 26Figure 20 Heap Pump Cooling Mode Circuir

Diagram ............................................... 26Figure 21 Fluid Connections w/Ventilation

Wall Sleeve .......................................... 28Figure 22 Fluid Connections w/o Ventilation

Wall Sleeve .......................................... 29Figure 23 Circulation System ............................... 33Figure 24 Water Temperature and Pressure

Test Procedure .................................. 34Figure 25 Performance Model WGPM-1C ........... 35Figure 26 Performance Model WGPM-2C ........... 35Figure 27 Piping Diagram .................................... 36Figure 28 Cleaning Water Coil ............................. 39Figure 29 Water Well System .............................. 40

TablesTable 1 Electrical Specifications ........................... 2Table 2 Operating Voltage Range ....................... 16Table 3 Wall Thermostats and Subbase

Combinations ......................................... 16Table 4 Indoor Blower Performance ................... 25Table 5 Dehumidification Relay Logic Board ...... 27Table 5 Cooling Pressure Table .......................... 30Table 6 Heating Pressure ................................... 31Table 7 Optional Accessories ............................. 32Table 8 Constant Flow Valves............................. 36Table 9 Water Flow and Pressure Drop .............. 41

ii

CONTENTS

Manual 2100-418Page 1

GETTING OTHER INFORMATION AND PUBLICATIONS

These publications can help you install the airconditioner or heat pump. You can usually find these atyour local library or purchase them directly from thepublisher. Be sure to consult current edition of eachstandard.

National Electrical Code ......................ANSI/NFPA 70

Standard for the Installation .............. ANSI/NFPA 90Aof Air Conditioning andVentilating Systems

Standard for Warm Air ...................... ANSI/NFPA 90BHeating and AirConditioning Systems

Load Calculation for Residential ...... ACCA Manual JWinter and SummerAir Conditioning

Duct Design for Residential ............. ACCA Manual DWinter and Summer Air Conditioningand Equipment Selection

Closed-Loop/Ground Source Heat Pump ........ IGSHPASystems Installation Guide

Grouting Procedures for Ground-Source ........ IGSHPAHeat Pump Systems

Soil and Rock Classification for the Design ... IGSHPAof Ground-Coupled Heat Pump Systems

Ground Source Installation Standards ............. IGSHPA

Closed-Loop Geothermal Systems – Slinky ... IGSHPAInstallation Guide

FOR MORE INFORMATION, CONTACTTHESE PUBLISHERS:

ACCA Air Conditioning Contractors of America1712 New Hampshire AvenueWashington, DC 20009Telephone: (202) 483-9370Fax: (202) 234-4721

ANSI American National Standards Institute11 West Street, 13th FloorNew York, NY 10036Telephone: (212) 642-4900Fax: (212) 302-1286

ASHRAE American Society of Heating Refrigerating,and Air Conditioning Engineers, Inc.1791 Tullie Circle, N.E.Atlanta, GA 30329-2305Telephone: (404) 636-8400Fax: (404) 321-5478

NFPA National Fire Protection AssociationBatterymarch ParkP.O. Box 9101Quincy, MA 02269-9901Telephone: (800) 344-3555Fax: (617) 984-7057

IGSHPA International Ground SourceHeat Pump Association490 Cordell SouthStillwater, OK 74078-8018


QW SERIES WATER SOURCE GENERAL INFORMATION

QW MODEL NOMENCLATURE

��

�

Maximum size of the time delay fuse or HACR type circuit breaker for protection of field wiring conductors.Based on 75° C copper wire. All wiring must conform to the National Electrical Code and all local codes.These “Minimum Circuit Ampacity” values are to be used for sizing the field power conductors. Refer to theNational Electric Code (latest revision), article 310 for power conductor sizing. CAUTION: When more thanone field power conductor circuit is run through one conduit, the conductors must be derated. Pay specialattention to Note 8 of Table 310 regarding Ampacity Adjustment Factors when more than three conductors are ina raceway.

MODEL NUMBERQW - QTEC Model

Water SourceHeat Pump

CAPACITY24 - 2 Ton30 - 2-1/2 Ton36 - 3 Ton42 - 3-1/2 Ton48 - 4 Ton60 - 5 Ton

REVISION

VOLTS & PHASEA - 2630/208-60-1B - 2308208-60-3C - 460-60-3

KW0Z - None

VENTILATION OPTIONSB - Blank-off PlateX - Barometric Fresh Air

DamperV - Commercial Ventilator -

Motorized Spring Returnw/Exhaust

P - Commercial Ventilator -Motorized power returnw/Exhaust

R - Energy RecoveryVentilator w/Exhaust

FILTER OPTIONSX - 1 Inch Fiberglass

(Standard)F - 2 Inch FiberglassP - 2 Inch Pleated

INTERNAL CONTROLSX - Standard

• High Pressure Switch• Low Pressure Switch• Compressor Time Delay

CLIMATE CONTROL OPTIONSX - NoneEFG

COLOR OPTIONSV - Platinum w/Slate

Front (Vinyl)4 - Gray (Painted)

QW 36 1 D A 0Z B X V X X X

COIL OPTIONSX - Standard Cupronickel

Water Coil4 - Copper Water Coil

TABLE 1ELECTRICAL SPECIFICATIONS

LEDOM

DETAR&STLOVESAHP

TIUCRICELGNIS

DLEIF.ONREWOPSTIUCRIC

3

MUMINIMTIUCRICYTICAPMA

1MUMIXAMLANRETXEROESUFTIUCRICREKAERB

2

DLEIFREWOPEZISERIW

2

DNUORGEZISERIW

Z0AD242WQZ0BD242WQZ0CD242WQ

1-802/0323-802/032

3-064

111

91418

520251

012141

012141


1-802/0323-802/032

3-064

111

126101

030251

012141

012141


1-802/0323-802/032

3-064

111

429101

535251

010141

010141


1-802/0323-802/032

3-064

111

720211

040351

80141

010141


1-802/0323-802/032

3-064

111

134221

545351

8841

010141


1-802/0323-802/032

3-064

111

544361

065402

8821

010121

Manual 2100-418

Page 3

FIGURE 1UNIT DIMENSIONS

MIS-1571FRONT VIEW RIGHT SIDE VIEW BACK VIEW


SHIPPING DAMAGE

Upon receipt of equipment, the carton should bechecked for external signs of shipping damage. Theskid must remain attached to the unit until the unit isready for installation. If damage is found, the receivingparty must contact the last carrier immediately,preferably in writing, requesting inspection by thecarrier’s agent.

It is recommended that the unit not be removed fromthe skid with a fork lift.

The shipping brackets on each side of the unit must beremoved and discarded. See Figure 2-A on Page 5.The return air grille panel can be removed to provide aplace to hold the unit. The unit can be slid forward onthe skid until the front wheels hang over the edge of theskid. See Figure 2-B. The unit can be tipped forwardand slid down the edge of the skid until the frontwheels touch the ground. See Figure 2-C. The wheelswill not roll. They are shipped from the factory lockedso they will not roll. The back of the skid will have tobe held down to keep it from tipping up. The skid canbe slid out from under the unit. The unit can then beset upright. FIGURE 2

REMOVAL OF UNIT FROM SKID

HOLD SKID DOWN

A SHIPPING BRACKETS B FRONT WHEELS OVER EDGE C FRONT WHEELS ON FLOOR

MIS-1603

The unit will have to be turned sideways and removedfrom the skid to fit through a 36” doorway. If the doorheight allows, the unit can be slid sideways through thedoor.

If the unit can not be slid through the door, then the unitwill have to be put on a cart and tipped down to rollthrough the door. It is recommended that an appliancecart by used with a strap to hold the unit on the cart.The wheels of the unit must be locked. If the wheelswere allowed to roll, the unit could roll off the cart.The unit should always be carted from the left side.This is the side where the compressor is located. SeeFigure 3. The blade of the appliance cart should be slidunder the wheels of the unit. The strap of the appliancecart should be placed around the unit and strappedtightly. Help will be required to tip the unit back ontothe cart. The unit can be leaned far enough back to berolled through the door. Be careful when setting theunit back up to keep from damaging the unit.

UNIT REMOVAL FROM SKID

HANDLING UNIT AFTER REMOVAL FROMSKID

WARNINGExercise extreme caution when pushing theunit on the rollers. Handle and push from thelower 1/3 of the unit. Insure that debris is noton the floor where the unit is to be moved onthe rollers. Failure to do so could result in theunit tipping over and causing bodily injuryand/or damage to the unit. WARNING

This unit is heavy and requires more than oneperson to handle and remove from the skid.Check unit wheels to ensure that wheels arelocked before removing from skid. Extremecaution must be taken to prevent injury topersonnel and damage to the unit.


REMOVAL OF WALL BRACKET FROMSHIPPING LOCATION (UNITS WITHBLANK OFF PLATE ONLY)

The wall brackets are attached to the back of the unit.Remove and retain the wall brackets for use whenattaching the unit to the wall. In units equipped with aventilator a wall sleeve is required and these two wallbrackets are not included. A different style bracket issupplied with the sleeve assembly.

GENERAL

The equipment covered in this manual is to be installedby trained, experienced service and installationtechnicians.

The unit is designed for use with or without duct work.For use without duct work, Plenum Box QPB** isrecommended.

These instructions explain the recommended method toinstall the water source self-contained unit and theelectrical wiring connections to the unit.

These instructions and any instructions packaged withany separate equipment required to make up the entireair conditioning system should be carefully read beforebeginning the installation. Note particularly “Start

Procedure” and any tags and/or labels attached to theequipment.

While these instructions are intended as a generalrecommended guide, they do not supersede any nationaland/or local codes in any way. Authorities havingjurisdiction should be consulted before the installationis made. See Page 1 for information on codes andstandards.

Size of unit for a proposed installation should be basedon heat loss calculation made according to methods ofAir Conditioning Contractors of America (ACCA). Theair duct should be installed in accordance with theStandards of the National Fire Protection Systems ofOther Than Residence Type, NFPA No. 90A, andResidence Type Warm Air Heating and AirConditioning Systems, NFPA No. 90B. Where localregulations are at a variance with instructions, installershould adhere to local codes.

MINIMUM INSTALLATION HEIGHT

The minimum installation height of the unit with a FreeBlow Plenum is 8 ft. 6 in. This provides enoughclearance for the plenum to be removed. See Figure 5.

The minimum installation height for ductedapplications is 8 ft. 4-1/2 in. This provides enoughclearance to install the duct work. See Figure 6.

FIGURE 3PROPER HANDLING OF UNITAFTER REMOVAL FROM SKID

APPLIANCECART

COMPRESSOR

QTEC UNIT(RIGHT SIDE)

STRAP

MIS-1555


FIGURE 4INSTALLATION OF UNIT THRU WALL WITH WALL SLEEVE

MIS-1564


FIGURE 6DUCTED APPLICATION

MIS-1558

FIGURE 5INSTALLATION WITH FREE BLOW PLENUM

CEILING

FLOOR

DUCT FLANGE

DUCTFIXED CEILINGSUSPENDEDCEILING

FLOOR MIS-1559

20 IN.MINIMUM


DUCT WORK

Any heat pump is more critical of proper operatingcharge and an adequate duct system than a straight airconditioning unit. All duct work must be properlysized for the design air flow requirement of theequipment. Air Conditioning Contractors of America(ACCA) is an excellent guide to proper sizing. All ductwork or portions thereof not in the conditioned spaceshould be properly insulated in order to both conserveenergy and prevent condensation or moisture damage.When duct runs through unheated spaces, it should beinsulated with a minimum of one inch of insulation.Use insulation with a vapor barrier on the outside of theinsulation. Flexible joints should be used to connectthe duct work to the equipment in order to keep thenoise transmission to a minimum.

The QTEC series heat pump has provision to attach asupply air duct to the top of the unit. Duct connectionsize is 12 inches x 20 inches. The duct work is fieldsupplied and must be attached in a manner to allow forease of removal when it becomes necessary to slide theunit out from the wall for service. See Figure 7 forsuggested attachment method.

NOTE: Unit cabinet, supply air duct and free blowplenum are approved for “0” clearance tocombustible material.

FILTERS

Two 1 inch throw away filters are supplied with eachunit. The filters fit into a fixed rack.

The filters are serviced from the inside of the building .To gain access to the filters release the latch on thecircuit breaker door and one 1/4 turn fastener near thebottom of the door. This door is hinged on the left so itwill swing open.

The internal filter brackets are adjustable toaccommodate 2 inch filters. The tabs for the 1 inchfilters must be bent down to allow the 2 inch filters toslide in place.

The QTEC series heat pumps are designed for use withfree return (non-ducted) and either free blow with theuse of QPB Plenum Box or a duct supply air system.

The QPB Plenum Box mounts on top of the unit andhas both vertically and horizontally adjustable louverson the front discharge grille. See Optional Accessories,Page 18, for the correct Plenum Box model number.

When used with a ducted supply, a QCX CabinetExtension can be used to conceal the duct work abovethe unit to the ceiling. This extends 20” above the unitfor a total height above the floor of 10’-7/8”. SeeOptional Accessories, Page 18 for the correct CabinetExtension model number. The unit is equipped with avariable speed indoor blower motor which increases inspeed with an increase in duct static pressure. The unitwill therefore deliver proper rated air flow up to theMaximum ESP shown in Table 5. However, for quietoperation of the air system, the duct static should bekept as low as practical, within the guidelines of goodduct design.

FIGURE 7SUPPLY DUCT CONNECTIONS

SUPPLY DUCTTO BE FIELDSUPPLIED

ATTACHMENTSCREWS TO BEFIELD SUPPLIED

DUCT FLANGEPROVIDED WITH UNIT

ROOM SIDEOF QW UNIT

MIS-978

CONDENSATE DRAIN

The condensate drain hose is routed down from theevaporator drain pan on the right side of the unit intothe compressor compartment. There are threelocations that the drain can exit the cabinet. For astand pipe type of drain, the drain hose can exit therear of the cabinet. There is adequate hose length toreach the floor on the right hand side of the unit.

If the drain is to be hard plumbed, there is a 3/4 inchpipe connection located on the right hand cabinetside near the rear and one on the cabinet rear panel.In these installations the drain tube is to be slippedover the pipe connection inside of the cabinet.

See Figures 8A, 8B and 8C.

NOTE: Whichever type of drain connection isused a “P” trap must be formed. SeeFigure 8.


FIGURE 8CONDENSATE DRAIN

FIGURE 8ASIDE DRAIN (SIDE VIEW)

QTEC UNIT

FIGURE 8BOPTIONAL REAR DRAIN

The side drain requires a water trap for proper drainage. See Figure 8A. The drain can be routedthrough the floor or through the wall. If the drain is to be routed through an unconditionedspace, it must be protected from freezing. The drain line must be able to be removed from theunit if it is necessary to remove the unit from the wall.

MIS-1568

MIS-976 MIS-974


The rear drain can be used with wall thickness of up to10 inches where a water trap can be installed betweenthe unit and the interior wall. See Figure 8B. The trapcannot extend beyond the edge of the unit or it willinterfere with the wall mounting bracket. The drain canbe routed through the floor or through the wall. If thedrain is routed through the wall, the drain line must bepositioned such that it will not interfere with the sleeveflange or the grille. See Figure 8C. If the drain is tobe routed through an unconditioned space, it mustbe protected from freezing.

FIGURE 8CREAR DRAIN (TOP VIEW)

WALLBRACKET

MIST ELIMINATOR SERVICE (Optional – only used with one of the vent options)

A mist eliminator is supplied with the wall sleeve. Themist eliminator is constructed of aluminum frame andmesh. The mist eliminator is located in the top sectionof the wall sleeve and can be removed from the insideof the building without removing the unit from the wall.This requires that the ventilation package must beremoved.

The steps necessary to remove each of the vent optionsare listed following.

It is recommended that the mist eliminator be inspectedannually and serviced as required. The mist eliminatorcan be inspected from the outside of the building bylooking through the outdoor grille. The mist eliminatorcan be serviced from the outside. The outdoor grillemust be removed to do so.

WALL(MAXIMUM 10”FOR REARDRAIN)

DRAIN LINE

COUPLINGS NOTSHOWN BUTRECOMMENDEDFOR EASE OFREMOVABILITYFOR SERVICE

SLEEVE

WATERTRAP

UNIT

MIS-977

The mist eliminator can be cleaned by washingwith soap and water. The excess water shouldbe shaken off the mist eliminator before it isreinstalled.

BAROMETRIC FRESH AIR DAMPER(Optional)

Before starting to remove make sure the powerhas been turned off. The hinged return air grillepanel must be opened. The fresh air damperassembly can be seen on the back of the unit.Refer to Figure 9.

1. The fresh air damper is attached to the backof the unit with one screw on either side ofthe assembly. Both of the screws must beremoved.

2. Once the mounting screws are removed, tiltthe assembly down and lift it out.

The mist eliminator can be seen through theopening. The mist eliminator must be raised upand the bottom can be pulled toward the front ofthe unit.


FIGURE 9FRESH AIR DAMPER REMOVAL

COMMERCIAL ROOM VENTILATOR OPTION

Before stating the removal make sure the power hasbeen turned off. The hinged return air grille must beopened. The commercial room ventilator (CRV) canbe seen after the panel has been removed. The CRVmust be removed to gain access to the mist eliminator.

1. The two mounting screws in the front of the CRVmust be removed.

2. The power connectors for the CRV (located on theright side of the unit) must be disconnected.Squeeze the tabs on the sides of the connector andpull straight out. Unplug both of the connectors.

3. Slide the CRV straight out of the unit.

The mist eliminator can be seen through the opening inthe back of the unit. The mist eliminator must be raisedup and the bottom can be pulled toward the front of theunit and removed.

MOUNTING SCREW

MIS-1627


QTEC ENERGY RECOVERY VENTILATOROPTION

Before starting the removal make sure that the powerhas been turned off. The hinged return air grille panelmust be opened. The energy recovery ventilator(QERV) can be seen after the panel is opened. To gainaccess to the mist eliminator, the QERV must beremoved. Refer to Figure 10

1. The front fill plate of the QERV must be removed.There is one screw on either side of the plate.Remove these screws and remove the plate.

2. On either side of the QERV there are mountingscrews that hold the QERV in place. Remove bothof these screws.

FIGURE 10REMOVAL OF THE QTEC ENERGY RECOVERY VENTILATOR

3. Underneath the heat recovery cassette there is apower connector for the lower blower assembly. Todisconnect this plug, the tabs on both sides of theplug must be squeezed to release the plug. Whilesqueezing the tabs, pull the plug out of the socket.

4. The QERV is plugged into the unit on the right sideof the unit. Both of these plugs must bedisconnected to remove the QERV. Squeeze thetabs on the sides of the connector and pull straightout.

5. Slide the QERV assembly straight out of the unitbeing careful not to let the cassette slide out of theQERV.

The mist eliminator can be seen through the opening inthe back of the unit. The mist eliminator must be raisedup and the bottom can be pulled toward the front of theunit and removed.

MIS-1605

FRONT FILL

MOUNTINGSCREWS

LOWER BLOWERASSEMBLY POWERCONNECTOR

POWERCONNECTORS


INSTALLATION INSTRUCTIONS

MOUNTING THE UNIT

When installing a QW unit near an interior wall on theleft side, a minimum of 8 inches is required; 12 inchesis preferred.

When installing a QW unit near an interior wall on theright side, a minimum of 12 inches is required asadditional space is required to connect the drain.

This clearance is required to allow for the attachment ofthe unit to the wall mounting brackets and the side trimpieces to the wall.

This unit is to be secured to the wall when there is not avent sleeve used with the wall mounting bracketsprovided. (NOTE: Wall mounting brackets are onlyshipped on units with no vent inside.) The unit itself,the supply duct, and the free blow plenum are suitablefor “0” clearance to combustible material.

NOTE: When a wall sleeve is to be used attach theunit to the sleeve with bracket supplied withthe wall sleeve.

Following are the steps for mounting the QW units forreference see Figure 12 on page 14.

1. Attach wall mounting bracket to the structure wallwith field supplied lag bolts. The fluid pipingconnections are to be within the confines of thisbracket. See Figure 1 for cabinet openings andlocation of fluid coil connection points.

2. Position the unit in front of the wall mountingbracket.

3. Remove the locking screws from the wheels. Referto Figure 11.

4. Roll the unit up to the wall mounting bracket. Theunit must be level from side to side. If anyadjustments are necessary, shim up under the rollerswith sheets of steel or any substance that is notaffected by moisture.

5. Secure the unit to the wall bracket with provided#10 hex head sheet metal screws. There areprepunched holes in the cabinet sides, and thebracket has slotted holes to allow for somemisalignment.

6. Position the bottom trim piece to the unit and attachwith provided screws (dark colored).

7. Position side trim pieces to the wall and attach withfield supplied screws. There are two long and twoshort pieces supplied. The long pieces are toenclose the gap behind the unit. The short piecesare to fill the gap behind the cabinet extension or thefree blow plenum box. They may be cut to suit theceiling height or overlap the unit side trim. There issufficient length to trim up to a 10’2” ceiling.

FIGURE 11REMOVING LOCKING SCREWS FROM WHEELS

MIS-1523REMOVE SCREWSFROM WHEELSBEFORE ROLLINGINTO PLACE


FIGURE 12UNIT MOUNTING WITHOUT VENTILATION WALL SLEEVE

(REFER TO MOUNTING INSTRUCTIONS ON PAGE 13)

SIDE TRIM(2 PIECES)

SIDE TRIM (2PIECES)

WALL MOUNTINGBRACKET

BOTTOM TRIMEXTENSION

BOTTOM TRIM PIECE

MIS-1557


FIGURE 13COMPONENT LOCATION

SIDE FIELDWIRE ENTRANCE

REMOTE THERMOSTATTERMINAL BLOCK

INDOOR BLOWER

CONTROL BOX/ CIRCUITBREAKER PANEL

ELECTRICALCONNECTION PANEL

MIS-1556


WIRING – MAIN POWER

Refer to the unit rating plate and/or Table 2 for wiresizing information and maximum fuse or “HACRType” circuit breaker size. Each unit is marked with a“Minimum Circuit Ampacity”. This means that thefield wiring used must be sized to carry that amount ofcurrent. Depending on the installed KW of electricheat, there may be two field power circuits required. Ifthis is the case, the unit serial plate will so indicate. Allmodels are suitable only for connection with copperwire. Each unit and/or wiring diagram will be marked“Use Copper Conductors Only”. These instructionsmust be adhered to. Refer to the National ElectricalCode (NEC) for complete current carrying capacity dataon the various insulation grades of wiring material. Allwiring must conform to NEC and all local codes.

The electrical data lists fuse and wire sizes (75° Ccopper) for all models, including the most commonlyused heater sizes. Also shown are the number of fieldpower circuits required for the various models withheaters.

The unit rating plate lists a “Maximum Time DelayRelay Fuse” or “HACR Type” circuit breaker that is tobe used with the equipment. The correct size must beused for proper circuit protection, and also to assure thatthere will be no nuisance tripping due to the momentaryhigh starting current of the compressor motor.

The disconnect access door on this unit may be lockedto prevent unauthorized access to the disconnect.

The field wiring connections are located behind the toppanel in the circuit breaker panel. The return air panelmust be removed first. This panel is equipped with adoor switch which shuts the unit down when it isremoved. The filter rack must be removed next.

WIRING – LOW VOLTAGE WIRING

230/208V, 1 PHASE AND 3 PHASE EQUIPMENTDUAL PRIMARY VOLTAGE TRANSFORMERS

All equipment leaves the factory wired on 240V tap.For 208V operation, reconnect from 240V to 208V tap.The acceptable operating voltage range for the 240 and208V taps are as noted in Table 2.

The standard Climate Control Option X is a remotethermostat connection terminal block. See Figure 15 forwiring diagram. Compatible thermostats are listed inTable 3.

The Climate Control Option E is an electronicprogrammable thermostat and a humidistat. Thesubbase of the thermostat and the humidistat are factorywired to the front panel of the unit. See Figure 16 forwiring diagram. Compatible for use with EnergyRecovery Ventilator or Ventilator.

The Climate Control Option F is an electronic non-programmable thermostat, timer and a humidistat. Thesubbase of the thermostat and the timer are factorywired to the front panel of the unit. See Figure 17 forwiring diagram. Compatible for use with EnergyRecovery Ventilator or Ventilator.

NOTE: The voltage should be measured at the fieldpower connection point in the unit and whilethe unit is operating at full load (maximumamperage operating condition).

TABLE 2OPERATING VOLTAGE RANGE

PAT EGNAR

V042 612-352

V802 781-022

TABLE 3WALL THERMOSTATS AND SUBBASE COMBINATIONS

tatsomrehT esabbuS serutaeFtnanimoderP

830-3048)A006H( A/N tatsidimuH

240-3048)0701G1158T( A/N looC/taeH/otuA/launaM

cinortcelEelbammargorP-noN

940-3048)083-39FI( A/N looC/taeHelbammargorP

cinortcelE


The climate Control Option G is an electronic non-programmable thermostat and humidistat. The subbaseof the thermostat is factory wired to the front panel ofthe unit. This option is compatible for use with theoptional CS2000 Energy Control Monitor and aterminal block is provided for connection to theCS2000. See Figure 18 for wiring diagram.Compatible for use with Energy Recovery Ventilator orVentilator.

NOTE: The CS2000 (or other field provided means tocontrol ventilation) must be used if any of themechanical (motorized) ventilation optionsare installed.

LOW VOLTAGE CONNECTIONS

These units use a grounded 24 volt AC low voltagecircuit.

The “R” terminal is the hot terminal and the “C”terminal is grounded.

“G” terminal or pin 6 of P4 is the fan input.

“Y” terminal or pin 7 of P4 is the compressor input.

“B” terminal or pin 8 of P4 is the reversing valve input.The reversing valve must be energized for heatingmode.

“R” terminal or pin 10 of P4 is 24 VAC hot.

“C” terminal or pin 11of P4 is 24 VAC grounded.

“L” terminal or pin 12 of P4 is compressor lockoutoutput. This terminal is activated on a high or lowpressure trip by the electronic heat pump control. Thisis a 24 VAC output.

FIGURE 14BLOWER MOTOR LOW VOLTAGE

WIRE HARNESS PLUG

MIS-1285

VIEWED FROM PIN ENDVIEWED FROM PIN END

“W2” terminal or pin 0 of P4 is second stage heat (ifequipped). If the unit is equipped with an optional hotwater coil plenum box the water valve will beconnected to this terminal.

“O1” terminal or pin 5 of P4 is the ventilation input.This terminal energizes any factory installedventilation option.

NOTE: For total and proper control using DDC, atotal of 6 controlled outputs are required (5if no ventilation system is installed).

“5” terminal of pin 2 of P4 is the 24 dehumidificationcircuit.

“4” terminal or pin 4 of P4 is the dehumidificationcircuit. A contact must connect terminals 4 and 5.

“6” terminal or pin 1 of P4 is VAC grounded to thehumidistat, if needed.

LOW VOLTAGE CONNECTIONFOR DDC CONTROL

Fan Only Energize G

Cooling Mode Energize Y, G

Heat Pump Heating Energize Y, G, B

2nd Stage Heating Energize G, W2(if employed)

Ventilation Energize B, O1

Dehumidification Connect 4 and 5


W1

R

L

Y1

W2

B

C

E

G

T8511

W1

R

L

Y1

W2

B

C

E1

G

1F93-380

A1

W1

4

6

5

Y1

4

6

5

3

HUM

R

L

Y

W2

B

Y

C

E

G

R

BL

Y

BK

R

BL

BR

PK

LVTB

R

0

O1 T

P4

10

2

4

1

7

12

8

9

3

11

6

5

FIGURE 15REMOTE THERMOSTAT WIRING DIAGRAM

“X” OPTION

4102-034



“E” THERMOSTAT OPTION

Y

R

BL

Y

BK

R

BL

BR

PK

R

0

T

P4

10

2

4

1

7

12

8

9

3

11

6

5

IF93-380

G

E1

C

B

W2

Y1

L

R

W1

HUM

3

5

6

4

Y

A1

H200

4102-032


4102-031

Y

R

BL

Y

BK

R

BL

BR

PK

R

0

T

P4

10

2

4

1

7

12

8

9

3

11

6

5

T8511

G

E

C

B

W2

Y1

L

R

W1

HUM

3

5

6

4

TIMER

Y


“F” THERMOSTAT OPTION



“G” THERMOSTAT OPTION

Y

R

BL

Y

BK

BL

BR

PK

0

P4

10

2

4

1

7

12

8

9

3

11

6

5

HUM

3

5

6

4

Y

CY1YO1

W1

R

L

Y1

W2

B

C

G

T8511

TB1

E

TO TB2TERM. "C"

R

4102-033A


START UP

DESCRIPTION OF STANDARDEQUIPMENT

LOW PRESSURE SWITCH

NOTE: This unit is supplied with two low pressureswitches installed, a 15 PSIG and a 27 PSIG.

The 27 PSIG is wired into the system. This switch issuitable for ground water (pump and dump), and waterloop (boiler/tower applications).

To avoid nuisance lockouts for ground loop applicationwith antifreeze, the 27 PSIG switch should bedisconnected and connect the 15 PSIG switch.

The leads for both switches are located in the lowerelectrical connection panel. The switch bodies aremarked with pressure settings. The 27 PSIG switch hasyellow leads. The 15 PSIG switch has blue leads.

HIGH PRESSURE SWITCH

This unit is equipped with a high pressure switch thatwill stop the compressor in the event of abnormal highpressure occurrences over 450 PSI.

The high and low pressure switches are included in alockout circuit that is resettable from the roomthermostat.

COMPRESSOR CONTROL MODULE

The compressor control module is optional on themodels covered by this manual. The compressorcontrol is an anti-short cycle/lockout timer with highand low pressure switch monitoring and alarm relayoutput.

ADJUSTABLE DELAY ON MAKE AND BREAKTIMER

On initial power up or any time power is interrupted tothe unit the delay on make period begins which will be2 minutes plus 10% of the delay on break setting.When the delay on make is complete and the highpressure switch (and low pressure switch, if employed)is closed, the compressor contactor is energized. Uponshutdown the delay on break timer starts and preventsrestart until the delay on break and delay on makeperiods have expired.

During routine operation of the unit with no powerinterruptions the compressor will operate on demandwith no delay.

HIGH PRESSURE SWITCH AND LOCKOUTSEQUENCE

If the high pressure switch opens, the compressorcontactor will de-energize immediately. The lockouttimer will go into a soft lockout and stay in soft lockoutuntil the high pressure switch closes and the delay onbreak time has expired. If the high pressure switchopens again in the same operating cycle the unit will gointo manual lockout condition and the alarm relaycircuit will energize. Recycling the wall thermostatresets the manual lockout.

LOW PRESSURE SWITCH, BYPASS ANDLOCKOUT SEQUENCE

If the low pressure switch opens for more than 120seconds, the compressor contactor will de-energize andgo into a soft lockout. Regardless the state of the lowpressure switch, the contactor will reenergize after thedelay on make time delay has expired. I the lowpressure switch remains open, of opens again for longerthan 120 seconds the unit will go into manual lockoutcondition and the alarm relay circuit will energize.Recycling the wall thermostat resets the manuallockout.

ALARM RELAY OUTPUT

Alarm terminal is output connection for applicationswhere alarm relay is employed. This terminal ispowered whenever compressor is locked out due toHPC or LPC sequences as described.

Note: Both high and low pressure switch controlsare inherently automatic reset devices. Thehigh pressure switch and low pressure switchcut out and cut in settings are fixed byspecific air conditioner or heat pump unitmodel. The lockout feature, both soft andmanual, are a function of the CompressorControl Module.

ADJUSTMENTS

ADJUSTABLE DELAY ON MAKE AND DELAYON BREAK TIMER

The potentiometer is used to select delay on break timefrom 30 seconds to 5 minutes. Delay on Make (DOM)timing on power up and after power interruptions isequal to 2 minutes plus 10% of Delay on Break (DOB)setting. See Delay on Make Timing chart on page 23.

During routine operation of the unit with no powerinterruptions the compressor will operate on demandwith no delay.


OPTIONAL CFM

This option is not available for QW241 or QW301.

These units are shipped from the factory set to operateat the optional CFM level shown in Table 4. Thisprovides lower operating sound levels for non-ducted,free discharge applications. This CFM level will reducethe system capacity performance by approximately 2%at the same energy efficiency.

Rated CFM is required for ducted applications formaximum performance rating. To obtain full CFM onthese models, connect jumper wire as follows:

1. Disconnect all power to the unit. Failure to do somay result in damage to the motor.

2. Open hinged return air grille panel

3. Open control panel cover.

4. Locate low voltage terminal strip. there is a pinkjumper wire with both ends attached to terminalmarked “G2”. Move one end of this jumper toterminal “Y”.

5. Reverse steps to reassemble.

IMPORTANT INSTALLER NOTE

For improved start up performance, wash the indoorcoil with dishwashing detergent.

PHASE MONITOR

All units with three phase scroll compressors areequipped with a three phase line monitor to preventcompressor damage due to phase reversal.

The phase monitor in this unit is equipped with twoLEDs. If the Y signal is present at the phase monitorand phases are correct, the green LED will light andcontactor will energize. If phases are reversed, the redfault LED will be lit and compressor operation isinhibited.

setunim50. )sdnoces03( BOD = MODsdnoces321

setunim0.1 )sdnoces06( BOD = MODsdnoces621

setunim0.2 )sdnoceS021( BOD = MODsdnoces231




DELAY ON MAKE TIMING

If a fault condition occurs, reverse two of the supplyleads to the unit. Do not reverse any of the unit factorywires as damage may occur.

SERVICE HINTS

1. Caution user to maintain clean air filters at all times.Also, not to needlessly close off supply air registers.This may reduce air flow through the system whichshortens equipment service life as well as increasingoperating costs and noise levels.

2. The heat pump wall thermostats perform multiplefunctions. Be sure that all function switches arecorrectly set for the desired operating mode beforetrying to diagnose any reported service problems.

SEQUENCE OF OPERATION

Cooling – Circuit R-Y makes the thermostat pull in thecompressor contactor starting the compressor andoutdoor motor. The G (indoor motor) circuit isautomatically completed on any call for coolingoperation, or can be energized by manual fan switch onsubbbase for constant air circulation.

Heating – A 24V solenoid coil on reversing valvecontrols heating cycle operation. Two thermostatoptions, one allowing “Auto” change over from cycle tocycle and the other constantly energizing solenoid coilduring heating season and thus eliminating pressureequalization noise except during defrost, are to be usedon “Auto” option, a circuit is completed for R-W1 andR-Y on each heating “on” cycle, energizing reversingvalve solenoid and pulling in compressor contactorstarting compressor and outdoor motor. Heat PumpHeating cycle now in operation.

The second option has no “Auto” change over position,but instead energizes the reversing valve solenoidconstantly whenever the system switch on subbase isplaced in “Heat” position, the “B” terminal being


constantly energized from R. A thermostat demand forheat completes R-Y circuit, puling in compressorcontactor starting compressor and outdoor motor. R-Galso make starting indoor blower motor.

Reheat Circuit – Thee is a small orifice insertedbetween the reheat coil return line and suction line thatwill prevent liquid from accumulating in the reheat coilwhen it is inactive. This drain does not affect thenormal operation of the system.

There is a check valve located in the reheat coil returnline. It has a soft spring to hold the ball on the seat.This will make the method of checking the ball freedomwith a magnet difficult. Refer to Figures 19 and 20 forthe location of the check valve and orifice.

When the system is operating in the dehumidificationmode the suction pressure will be reduced by 4 to 8 psigand the discharge pressure will be reduced by 19 to 22psig.

Return Air Thermostat – In dehumidification mode ifthe return air temperature is lower than 65°, the returnair thermostat closes and deactivates dehumidification.

High / Low Pressure Control provides protection forthe compressor. In the event system pressures go highor low pressure settings in either heating or coolingmode the compressor will be stopped. This willactivate the red light located in the control panel. Thelockout circuit will hold compressor off line. When thesystem problem is corrected, the unit operation can berestored by turning of the main power supply off andthen back on, or reset the room thermostat. The lowpressure control has a bypass to eliminate nuisancelockout on cold start up.

OPTIONAL CLIMATE CONTROLSSEQUENCE OF OPERATION

The Climate Control Option E is an electronicprogrammable thermostat and humidistat. This unit hasa refrigerant reheat circuit that is controlled by a threeway valve.

When the humidity is above the setpoint of thehumidistat, the compressor circuit and the thee wayvalve are energized and the evaporator air flow isreduced. The three way valve directs hot discharge gasinto a separate desuperheating condenser circuit thatreheats the conditioned air before it is delivered to theroom. When the humidistat is satisfied, the systemswitches back to normal air conditioning mode. If thethermostat call for cooling during dehumidificationmode, the call for cooling takes precedence over thedehumidification and the unit will cool until thethermostat is satisfied. Once the call for cooling issatisfied, the unit may continue to dehumidify.

If the thermostat calls for first stage heat when the unitis in dehumidification mode, the unit will continue to

run in dehumidification mode until a second stage heatcall is received.

If the unit is running in heat pump mode and thehumidistat calls for dehumidification, thedehumidification mode takes precedence over the heatpump heating mode. The unit will not return to theheating mode until second stage heating is called for.

The climate Control Option F has a non-programmableelectronic thermostat, timer, and humidistat. This unithas a refrigerant reheat circuit that is controlled by athree way valve.

Unit operation is controlled by the manually operatedtimer. Normal heating, cooling or ventilation isavailable only when the timer is on. Dehumidificationcan be set to be available only when the timer is on, orto be available continuously by switching a jumper onthe relay logic board.

When the humidity is above the setpoint of thehumidistat, the compressor circuit and the three wayvalve are energized and the evaporator air flow isreduced. The three way valve directs hot discharge gasinto a separate desuperheating condenser circuit thatreheats the conditioned air before it is delivered to theroom. If the return air thermostat senses a temperaturebelow 65° during dehumidification is cancelled. Whenthe humidistat is satisfied the system switches back tonormal sir conditioning mode.

If the thermostat calls for cooling duringdehumidification mode, the call for cooling takesprecedence over the dehumidification and the unit willcool until the thermostat is satisfied. Once the call forcooling is satisfied, the unit may continue todehumidify.

If the thermostat calls for first stage heat when the unitis in dehumidification mode, the unit will continue torun in dehumidification mode until a second stage heatcall is received.


The Climate Control Option G has a non-programmable electronic thermostat, humidistat and iscompatible for use with a CS2000 Energy ControlMonitor. This unit has a refrigerant reheat circuit thatis controlled by a three way valve.

Unit operation is controlled by the thermostat andhumidistat and optional SC2000 Energy MonitorController can be easily integrated by simpleconnection to the low voltage terminal block provided.See Figure 18.


� Maximum ESP (inches WC) shown is with 1” thick disposable filter (reduced by .2 for 2” filter).� Rated CFM for ducted applications – required for maximum performance rating. To obtain full CFM on

models QW361, QW421, QW481 and QW601 locate low voltage terminal strip in the circuit breaker box.There is a pink jumper wire with both ends attached to terminal marked “G2”. Move one end of the jumper toterminal “Y”.

� Optional CFM – the unit is shipped from the factory set to operate at the optional CFM level shown.This provides lower operating sound levels for non-ducted, free discharge applications. This reducessystem capacity performance by approximately 2% at the same energy efficiency.

� Continuous fan CFM is the total air being circulated during continuous fan mode.

TABLE 4INDOOR BLOWER PERFORMANCE

NOTE: These units are equipped with a variable speed (ECM) indoor motor that automaticallyadjusts itself to maintain approximately the same rate of indoor air flow in both heatingand cooling, dry and wet coil conditions, and at both 230/208 or 460 volts.

LEDOMDETARPSE

1

PSE.XAM

2

MFCDETAR

3LANOITPO

MFC

4SUOUNITNOC

MFCMFC @ .XAM

PSE

D242WQ 0.0 5.0 007 A/N 007 007

D203WQ 0.0 8.0 0001 A/N 0001 019

D163WQ 0.0 8.0 0021 0001 0001 5711

D124WQ 0.0 8.0 0021 0001 0001 5711

D184WQ 0.0 8.0 0041 0011 0011 5711

D106WQ 0.0 8.0 0551 0521 0521 0041

NOTE: The CS2000 (or other means for ventilationcontrol) must be used if any mechanical(motorized) ventilation options are installed.

Dehumidification can be set to be available only whenCS2000 is active or to be available continuously byswitching a jumper at the relay logic board.

When the humidity is above the setpoint of thehumidistat, the compressor circuit and the three wayvalve are energized and the evaporator air flow isreduced. The three way valve directs hot discharge gasinto a separate desuperheating condenser circuit thatreheats the conditioned air before it is delivered to theroom. If the return air thermostat senses a temperaturebelow 65° during dehumidification, dehumidification iscancelled. When the humidistat is satisfied the systemswitches back to normal sir conditioning mode.

If the thermostat calls for cooling duringdehumidification mode, the call for cooling takesprecedence over the dehumidification and the unit willcool until the thermostat is satisfied. Once the call forcooling is satisfied, the unit may continue todehumidify.

If the thermostat calls for first stage heat when the unitis in dehumidification mode, the unit will continue torun in dehumidification mode until a second stage heatcall is received.


REFRIGERANT TUBE SCHEMATIC FORREHEAT COIL

Figure 19 shows the refrigerant gas flow through thereheat coil during the dehumidification mode.

When the unit is in standard cooling, Figure 20, orheating mode the reheat coil is inactive.

PRESSURE SERVICE PORTS

High and low pressure service ports are installed on allunits so that the system operating pressures an beobserved. Pressure curves can be found later in themanual covering all models on both cooling andheating cycles. It is imperative to match the correctpressure curve to the unit by model number. Upperand lower service doors must be attached to obtainproper reading.


FIGURE 19

FIGURE 20

WATER

WATER

HEAT PUMP DEHUMIDIFICATIONMODE CIRCUIT DIAGRAM

ORIFICEDRAIN ASS'Y

CHECKVALVE

BULB

EXPANSIONVALVE

3 WAYVALVE

FILTER/DRIER

4 WAYVALVE

COMPRESSOR

WATERCOIL

REHEAT COIL

INDOOR COIL

OPENCIRCUIT

DISTRIBUTOR

MIS-1788 A

INDOOR COIL

REHEAT COIL

WATERCOIL

COMPRESSOR

4 WAYVALVE

FILTER/DRIER

3 WAYVALVE

EXPANSIONVALVE

BULB

CHECKVALVE

ORIFICEDRAIN ASS'Y

HEAT PUMP COOLINGMODE CIRCUIT DIAGRAM

WATER

WATER

CLOSEDCIRCUIT

DISTRIBUTOR

MIS-1788A

Manual 2100-418

Page 27

TABLE 5DEHUMIDIFICATION RELAY LOGIC BOARD

draoBotstupnI draoBmorFstuptuOG Y B 2W 1E 1A D TAR L 1G KB OY VR W E 2A VWT L

edoMgnilooC deipucconU X X X X XedoMgnilooC deipuccO X X X X X X XedoMgnilooC muheD/w X X X X X X

gnitaeHegatSts1 deipucconU X X X X X X XgnitaeHegatSts1 deipuccO X X X X X X X X XgnitaeHegatSts1 muheD/w X X X X X X X X

gnitaeHegatSdn2 deipucconU X X X X X X X X XgnitaeHegatSdn2 deipuccO X X X X X X X X X X XgnitaeHegatSdn2 muheD/w X X X X X X X X X X

noitacifidimuheD deipucconU X X X XnoitacifidimuheD deipuccO X X X X X X XnoitacifidimuheD TAR/w X X

NOTES:

� Cooling takes precedence over dehumidification. A cooling call cancels dehumidification.

� Dehumidification takes precedence over first stage heating.

� Second stage heating cancels dehumidification.


29"

34"

FLOOR

WALL OPENING35" x 29 1/2"

FLUID ACCESSFROM EACH SIDE

FLUID ACCESSFROM EACH SIDE

SLEEVE

OPENING INREAR OF UNIT3" x 8"

FLUID ACCESSFROM FLOOR

BACK OF UNIT

MOUNTING BRACKETS(SHIPPED WITH WALLSLEEVE)

MIS-16021-18-01

REF.

23 1/2"

63 1/2"

8 1/2"33"

SIDE TRIM PIECES (SHIPPEDWITH UNIT) IF THE WALLTHICKNESS IS LESS THAN 14" BUT GREATER THAN 8",A SIDE TRIM EXTENSION KITQSTX42 IS REQUIRED. REFERTO UNIT SPEC. SHEET FOR PROPER COLOR

SIDE TRIM PEICES(SHIPPED WITH UNIT)

FLUID ACCESSFROM CEILING

FLUID ACCESS FROMCEILING

8" TO 14" EXTERIOR WALL

SLEEVE

TOP OF UNIT

FIGURE 21FLUID CONNECTIONS ON UNIT WITH VENTILATION WALL SLEEVE


WATER LINES

WALL BRACKET

WALL BRACKET

TOP VIEW

WALL LOCATION

4"

FLUID ACCESS FROM FLOOR

FLOOR

WALL BRACKET(LEFT BRACKET REMOVED FORCLARITY)

FLUID ACCESSFROM TOP

OPENING INREAR OF UNIT3" x 8"

BACK OF UNIT

MIS-160111/10/00

8 1/2"

63 1/2"

23 1/2"

FIGURE 22FLUID CONNECTIONS ON UNIT WITHOUT VENTILATION WALL SLEEVE


Fluid Temperature Entering Water Coil Degree F

TABLE 6PRESSURE TABLE

COOLING

ledoMriAnruteRerutarepmeT erusserP 54 05 55 06 56 07 55 08 58 09 59 001 501 011

D242WQ

26/57 ediSwoLediShgiH

86721

86631

86541

96551

96761

96871

07191

07602

17022

17632

17352

27072

27982

27803


37031

37931

37941

47951

47171

47381

57691

57112

67622

67242

67952

77772

77692

77613


67531

67441

67451

77561

77771

77981

87302

87812

97432

97052

97862

08782

08603

08723

D203WQ


26221

36431

56641

66851

86271

96481

17891

27212

47522

57042

67452

77962

87482

97992


66521

76731

96051

17261

37671

47981

67302

77712

97132

08642

18162

28672

38192

58703


86921

96241

17551

37861

57281

77691

97012

08522

28932

38552

48072

58682

68103

88813

D163WQ


76911

86921

96041

96151

07461

17671

17091

27402

27912

37432

37152

47762

47582

57203


27221

37231

47441

47551

57861

67181

67591

77902

77522

87042

87752

97472

97292

08013


67621

67731

77941

77061

87471

97781

97202

08612

08332

18842

18662

28482

28203

38123

D124WQ


16521

36531

56441

56451

76661

86871

07191

17502

27912

37532

47252

57962

57882

67603


56821

76831

96841

07851

27071

37381

57691

67012

77522

87142

97852

08672

08592

18413


76231

96341

17351

27461

57671

67981

87302

97712

08332

18942

28762

38682

38503

48523

D184WQ


37331

57141

77051

97161

28371

48581

88991

19512

49132

79942

101762

501882

901903

311233


87631

08541

28451

58561

88771

09091

49402

79022

001732

401552

801472

211592

711713

121043


18141

38051

58951

88171

19381

39791

79112

001822

401542

801462

211482

611503

121823

521253

D106WQ


36811

36031

26141

26451

26761

36081

36491

46802

56222

56732

66252

76762

96482

17992


76121

76331

66541

66851

66171

76581

76991

86312

96822

07342

17852

27472

47192

67703


96521

96831

86051

86461

86771

96191

96602

07022

17632

27252

37762

57482

77103

97813

FLOW RATE FOR VARIOUS FLUIDS

The data in the above pressure chart is based on the following flow rates:

D242WQ D203WQ D163WQ D124WQ D184WQ D106WQ

retawhserfMPGderiuqeretarwolF 3 4 5 6 6 9

muidoS%51MPGderiuqeretarwolFedirolhC 4 6 7 8 8 11

4SG%52MPGderiuqeretarwolF 4 6 7 8 8 11


ledoMriAnruteRerutarepmeT erusserP 52 03 53 04 54 05 55 06 56 07 57 08

D242WQ 86 ediSwoLediShgiH

04571

14671

34771

44871

54971

64081

74181

84281

94481

05581

15681

15881


53471

93871

34381

74781

15391

65891

16502

76112

37812

97522

58332

29142


63171

83571

14181

54781

94391

45991

95602

66312

27122

08822

88732

79542


33471

73971

14581

54291

05891

55502

06212

56912

17622

77432

48142

09942


13671

53181

93781

34491

74002

25702

65512

26222

76032

37832

97742

58652


33412

73612

24912

64322

15922

65632

26542

76452

37562

97872

68192

39603

TABLE 7PRESSURE TABLE

HEATING Fluid Temperature Entering Water Coil Degree F

The data in the above pressure chart is based on the following flow rates:

D242WQ D203WQ D163WQ D124WQ D184WQ D106WQ

retawhserfMPGderiuqeretarwolF 3 4 5 6 6 9

muidoS%51MPGderiuqeretarwolFedirolhC 4 6 7 8 8 11

4SG%52MPGderiuqeretarwolF 4 6 7 8 8 11

FLOW RATE FOR VARIOUS FLUIDS

Manual 2100-418

Page 32

TABLE 8OPTIONAL ACCESSORIES

Optional Accessories – Must Be Used For Each Installation W/Ventilation Options

Ventilation Wall Sleeves:

QWVS42 Ventilation wall sleeve for walls up to 14 inches thick

Ventilation Outdoor Louver Grilles:

QLG-11 Clear Anodized Aluminum for vent option QLG-21 Medium Bronze Anodized Aluminum for vent option QLG-31 Dark Bronze Anodized Aluminum for vent option

Optional Accessories – For Ground Loop Installations

WGPM-1C Single pump module for individual loop system. 22 feet of head @ 16 GPM. Installs inside QW unit. 230V 60 Hz – 1-Ph. Used with all models, including 460V. Connections are 1 inch FPT. Fully insulated cabinet.

WGPM-2C Dual pump module for individual loop system. 44 feet of head @ 16 GPM. Installs inside QW unit. 230V 60 Hz – 1-Ph. Used with all models, including 460V. Connections are 1 inch FPT. Fully insulated cabinet.

WGRK-1 460 Volt relay kit. Required when installing a pump module in a 460 Volt.

WGHK-1 Hose kit for pump module installations. Connections are 1 inch MPT. Includes all parts for connection to pump module and PT adapter fittings.

Optional Accessories – Additional Items As Determined By Job Specifications

NOTE: The following accessory items must be selected so that the finish (color) is matched to the QW model that they will be used with.

Side Trim Extension Kits: Required when wall thickness is less than 14 inches and works for walls down to 8 inches thick. Used in place of standard trim kit supplied with unit to cover the space between unit and wall.

Unit Compatibility

QSTX42A-V Platinum vinyl QSTX42-A4 Gray paint All Models

Free-Blow Plenum Boxes: Unit Compatibility QPB42-V Platinum vinyl QPB42-4 Gray paint Front supply, 4-way deflection grille All Models QPBS42-V Platinum vinyl QPBS42-4 Gray paint Same as QPB42, plus 2-way defection grill on each side All Models

Top Fill Systems for Finishing Plenum Boxes to Ceilings: Unit Compatibility QPBX42-9-V Platinum vinyl QPBX42-9-4 Gray paint Use with QPB42 or QPBS42 (adjusts to ceilings up to 9’ 6”) All Models QPBX42-10-V Platinum vinyl QPBX42-10-4 Gray paint Use with QPB42 or QPBS42 (adjusts to ceilings up to 10’ 2”) All Models

Cabinet Extensions for Ducted Applications: Unit Compatibility QCX10A-V Platinum vinyl QCX10A-4 Gray paint 20” height (adjusts for ceilings up to 9’ 4”; add QPBX42-9 for 9’ 4” to

10’ finished ceiling heights) All Models

Hot Water Coils with Plenum Boxes: Unit Compatibility QPBHW42-F-V Platinum vinyl QPBHW42-F-4 Gray paint Free-blow plenum box All Models QPBHW42-D-V Platinum vinyl QPBHW42-D-4 Gray paint Ducted plenum box All Models NOTE: The same top fill system and cabinet extensions can be used with hot water coil plenum boxes as with standard plenum boxes.


CIRCULATION SYSTEM DESIGN

Equipment room piping design is based on years ofexperience with earth coupled heat pump systems. Thedesign eliminates most causes of system failure.

Surprisingly, the heat pump itself is rarely the cause.Most problems occur because designers and installersforget that a closed loop earth coupled heat pumpsystem is not like a household plumbing system.

Most household water systems have more than enoughwater pressure either from the well pump of themunicipal water system to overcome the pressure ofhead loss in 1/2 inch or 3/4 inch household plumbing.A closed loop earth coupled heat pump system,however, is separated from the pressure of thehousehold supply and relies on a small, low wattagepump to circulate the water and antifreeze solutionthrough the earth coupling, heat pump and equipmentroom components.

The small circulator keeps the operating costs of thesystem to a minimum. However, the performance ofthe circulator must be closely matched with the

FIGURE 23CIRCULATION SYSTEM

MIS-1587

pressure of head loss of the entire system in order toprovide the required flow through the heat pump.Insufficient flow through the heat exchanger is one ofthe most common causes of system failure. Propersystem piping design and circulator selection willeliminate this problem

Bard supplies a work sheet to simplify head losscalculations and circulator selection. Refer to“Circulating Pump Work sheet” section in manual2100-099.

COPPER WATER COIL APPLICATION

Copper water coils are available as a factory installedoption. The unit model number will indicate the coiloption as the next to last character; “X” is for standardcoil constructed of Cupronickel material and “4” is fro awater coil constructed of copper.

The Cupronickel coil is suitable for all applications.The copper coil is suitable for applications usingground loop and cooling tower only and is never tobe used in an open well application.

CLOSED LOOP(Earth Coupled Ground Loop Applications)

PIPE FROM GROUND LOOP PIPE TO GROUND LOOP

PUMP MODULE(See Spec Sheet for Model No.)

STRAINER

FLOW CONTROL

UNIONS

1” FLEXIBLE HOSE


START UP PROCEDURE FOR CLOSEDLOOP SYSTEM

1. Be sure main power to the unit is OFF atdisconnect.

2. Set thermostat system switch to OFF, fan switch toAUTO.

3. Move main power disconnect to ON. Except asrequired for safety while servicing, Do not openthe unit disconnect switch.

4. Check system air flow for obstructions.

A. Move thermostat fan switch to ON. Blowerruns.

B. Be sure all registers and grilles are open.

C. Move thermostat fan switch to AUTO. Blowingshould stop.

5. Flush, fill and pressurize the closed loop system asoutlined in manual 2100-099.

6. Fully open the manual inlet and outlet valves. Startthe loop pump module circulator(s) and check forproper operation. If circulator(s) are not operating,turn off power and diagnose the problem.

7. Check fluid flow using a direct reading flow meteror a single water pressure gauge, measure thepressure drop at the pressure/temperature plugsacross the water coil. Compare the measurementwith flow versus pressure drop table to determinethe actual flow rate. If the flow rate is too low,

recheck the selection of the loop pump modulemodel for sufficient capacity. If the moduleselection is correct, there is probably trapped air or arestriction in the piping circuit.

8. Start the unit in cooling mode. By moving thethermostat switch to cool, fan should be set forAUTO.

9. Check the system refrigerant pressures against thecooling refrigerant pressure table in the installationmanual for rated water flow and entering watertemperatures. If the refrigerant pressures do notmatch, check for air flow problem then refrigerationsystem problem.

10. Switch the unit to the heating mode. By moving thethermostat switch to heat, fan should be set forAUTO.

11. Check the refrigerant system pressures against theheating refrigerant pressure table in installationmanual. Once again, if they do not match, check forair flow problems and then refrigeration systemproblems.

NOTE: If a charge problem is determined (high or low):

A. Check for possible refrigerant leaks.

B. Recover all remaining refrigerant from unit andrepair leak.

C. Evacuate unit down to 29 inches of vacuum

D. Recharge the unit with refrigerant by weight.This is the only way to insure a proper charge.

FIGURE 24WATER TEMPERATURE and PRESSURE PROCEDURE

DIAL FACE PRESSURE GAUGEWITH GAUGE ADAPTOR

THERMOMETER WATER COIL CONNECTIONAT HEAT PUMP

TEST PLUG CAP

PETE’S TEST PLUG

UNION

MIS-1637


0

10

20

30

40

50

60

70

0 5 10 15 20 25 30 35

Flow (GPM)

Hea

d (F

eet)

FIGURE 26PERFORMANCE MODEL WGPM-2C LOOP PUMP MODULE

0

5

10

15

20

25

30

35

0 5 10 15 20 25 30 35

Flow (GPM)

Hea

d (F

eet)

FIGURE 25PERFORMANCE MODEL WGPM-1C LOOP PUMP MODULE


OPEN LOOP(Well System Applications)

WATER CONNECTIONS

It is very important that an adequate supply of clean,noncorrosive water at the proper pressure be providedbefore the installation is made. Insufficient water, inthe heating mode for example, will cause the lowpressure switch to trip, shutting down the heat pump.In assessing the capacity of the water system, it isadvisable that the complete water system be evaluatedto prevent possible lack of water or water pressure atvarious household fixtures whenever the heat pumpturns on. All plumbing to and from the unit is to beinstalled in accordance with local plumbing codes. Theuse of plastic pipe, where permissible, is recommendedto prevent electrolytic corrosion of the water pipe.Because of the relatively cold temperatures encounteredwith well water, it is strongly recommended that thewater lines connecting the unit be insulated to preventwater droplets form condensing on the pipe surface.

Refer to piping, Figure 27. Slow closing SolenoidValve (6) with a 24 V coil provides on/off control ofthe water flow to the unit. Refer to the wiring diagramfor correct hookup of the valve solenoid coil.

Constant Flow Valve (7) provides correct flow ofwater to the unit regardless of variations in waterpressure. Observe the water flow direction indicated bythe arrow on the side of the valve body. Table 9 is atable showing the flow rate of each valve. Twoconstant flow rate valves may be installed in parallel toincrease the flow. For example, when a 8603-007 (6GPM) and 8603-011 (5 GPM) are installed in parallelthe total flow will be 11 GPM.

FIGURE 27PIPING DIAGRAM

MIS-1569

TO WATER COIL

FROM WATER COIL

COPPER WATER COIL LIMITATIONS

Copper water coils are available as a factory installedoption. The unit model number will indicate the coiloption as the next to last character; “X” is for standardcoil constructed of Cupronickel material and “4” is froa water coil constructed of copper.

The Cupronickel coil is suitable for all applications.The copper coil is suitable for applications usingground loop and cooling tower only and is never tobe used in an open well application.

TABLE 9CONSTANT FLOW VALVES

(1) The pressure drop through the constant flow valve will vary depending on the availablepressure ahead of the valve. Unlessminimum of 15 psig is available immediatelyahead of the valve, no water will flow.

.oNtraPelbaliavA.niMGISPerusserP

etaRwolFMPG

700-3068 )1(51 6

800-3068 )1(51 8

010-3068 )1(51 4

110-3068 )1(51 5

910-3068 )1(51 3


Strainer (5) installed upstream of constant flow valve(7) to collect foreign material which would clog theflow valve orifice.

Figure 22 on preceding page shows the use of shutoffvalves (9) and (11), on the in and out water lines topermit isolation of the unit from the plumbing systemshould future service work require this. Globe valvesshould not be used as shutoff valves because of theexcessive pressure drop inherent in the valve design.Instead us gate or ball valves as shut-offs so as tominimize pressure drop.

Figure 22 shows the use of shutoff valves (9) and (11),on the in and out water lines to permit isolation of theunit from the plumbing system should future servicework require this. Globe valves should not be used asshutoff valves because of the excessive pressure dropinherent in the valve design. Instead us gate or ballvalves as shut-offs so as to minimize pressure drop.

Drain cock (8) and (10), and tees have been includedto permit acid cleaning the refrigerant-to-water coilshould such cleaning be required. See WATERCORROSION section on page 38.

Drain cock (12) provides access to the system to checkwater flow through the constant flow valve to insureadequate water flow through the unit. A water meter isused to check the water flow rate.

WELL PUMP SIZING

Strictly speaking, sizing the well pump is theresponsibility of the well drilling contractor. It isimportant, however, that the HVAC contractor befamiliar with the factors that determine what size pumpwill be required. Rule of thumb estimates willinvariably lead to under or oversized well pumps.Undersizing the pump will result in inadequate water tothe whole plumbing system but with especially badresults to the heat pump – NO HEAT / NO COOL callswill result. Oversized pumps will short cycle and couldcause premature pump motor or switch failures.

The well pump must be capable of supplying enoughwater and at an adequate pressure to meet competingdemands of water fixtures. The well pump must besized in such a way that three requirements are met:

1. Adequate flow rate in GPM.

2. Adequate pressure at the fixture.

3. Able to meet the above from the depth of thewell-feet of lift.

The pressure requirements put on the pump are directlyaffected by the diameter of pipe being used, as well as,by the water flow rate through the pipe. The work sheetincluded in manual 2110-078 should guarantee that the

well pump has enough capacity. It should also ensurethat the piping is not undersized which would create toomuch pressure due to friction loss. High pressure lossesdue to undersized pipe will reduce efficiency andrequire larger pumps and could also create water noiseproblems.

SYSTEM START UP PROCEDURE FOROPEN LOOP APPLICATIONS

1. Be sure main power to the unit is OFF at disconnect.

2. Set thermostat system switch to OFF, fan switch toAUTO.

3. Move main power disconnect to ON. Except asrequired for safety while servicing – do not open theunit disconnect switch.

4. Check system air low for obstructions.

A. Move thermostat fan switch to ON. Blowerruns.

B. Be sure all registers and grilles are open.

C. Move thermostat fan switch to AUTO. Blowershould stop.

5. Fully open the manual inlet and outlet valves.

6. Check water flow.

A. Connect a water flow meter to the drain cockbetween the constant flow valve and thesolenoid valve. Run a hose from the flow meterto a drain or sink. Open the drain cock.

B. Check the water flow rate through constant flowvalve to be sure it is the same as the unit is ratedfor.

C. When water flow is okay, close drain cock andremove the water flow meter. The unit is nowready to start.

7. Start the unit in cooling mode. By moving thethermostat switch to cool, fan should be set forAUTO.

A. Check to see the solenoid valve opened.

8. Check the system refrigerant pressures against thecooling refrigerant pressure table in the installationmanual for rated water flow and entering watertemperatures. If the refrigerant pressures do notmatch, check for air flow problem that refrigerationsystem problem.

9. Switch the unit to the heat mode. By moving thethermostat switch to heat, fan should be set forAUTO.

A. Check to see the solenoid valve opened again.


10. Check the refrigerant system pressures against theheating refrigerant pressure table in installationmanual. Once again, if they do not match, check forair flow problems and then refrigeration systemproblems.

NOTE: If a charge problem is determined (high or low):

A. Check for possible refrigerant loss.

B. Discharge all remaining refrigerant from unit.

C. Evacuate unit down to 29 inches of vacuum.

D. Recharge the unit with refrigerant by weight.This is the only way to insure proper charge.

WATER CORROSION

Two concerns will immediately come to light whenconsidering a water source heat pump, whether forground water or for a closed loop application: Willthere be enough water? And, how will the water qualityaffect the system?

Water quantity is an important consideration and onewhich is easily determined. The well driller mustperform a pump down test on the well according tomethods described by the Nation Well WaterAssociation. This test, if performed correctly, willprovide information on the rate of low and on thecapacity of the well. It is important to consider theoverall capacity of the well when thinking about a watersource heat pump because the heat pump may berequired to run for extended periods of time.

The second concern, about water quality, is equallyimportant. Generally speaking, if the water is notoffensive for drinking purposes, it should pose noproblem for the heat pump. The well driller or localwater softening company can perform tests which willdetermine the chemical properties of the well water.

Water quality problems will show up in the heat pumpin one of more of the following ways:

1. Decrease in water flow through the unit.

2. Decreased heat transfer of the water coil (entering toleaving water temperature difference is less).

There are four main water quality problems associatedwith ground water. These are:

1. Biological Growth. This is the growth ofmicroscopic organisms in the water and will shopup as a slimy deposit throughout the water system.Shock treatment of the well is usually required andthis is best left up to the well driller. The treatmentconsists of injecting chlorine into the well casingand flushing the system until all growth is removed.

2. Suspended Particles in the Water. Filteringwill usually remove most suspended particles (finesand, small gravel) from the water. The problemwith suspended particles in the water is that it willerode metal parts, pumps, heat transfer coils, etc.So long as the filter is cleaned and periodicallymaintained, suspended particles should pose noserious problem. Consult with your well driller.

3. Corrosion of Metal. Corrosion of metal partsresults from either highly corrosive water (acidwater, generally not the case with ground water) ofgalvanic reaction between dissimilar metals in thepresence of water. By using plastic plumbing ordielectric unions galvanic reaction is eliminated.The use of corrosion resistant materials such as theCupro nickel coil) through the water system willreduce corrosion problems significantly.

4. Scale Formation. Of all the water problems, theformation of scale by ground water is by far themost common. Usually this scale is due to theformation of calcium carbonate by magnesiumcarbonate or calcium sulfate may also be present.Carbon dioxide gas (CO

2), the carbonate of calcium

and magnesium carbonate, is very soluble in water.It will remain dissolved in the water until someoutside factor upsets the balance. This outsideinfluence may be a large change in watertemperature or pressure. When this happens,enough carbon dioxide gas combines with dissolvedcalcium or magnesium in the water and falls out ofsolution until a new balance is reached. The changein temperature that this heat pump produces isusually not high enough to cause the dissolved gasto fall out of solution. Likewise, if pressure dropsare kept to a reasonable level, no precipitation ofcarbon dioxide should occur.

REMEDIES OF WATER PROBLEMS

Water Treatment. Water treatment can usually beeconomically justified for close loop systems. However,because of the large amounts of water involved with aground water heat pump, water treatment is generallytoo expensive.

Acid Cleaning the Water Coil or Heat PumpRecovery Unit. If scaling of the coil is stronglysuspected, the coil can be cleaned up with a solution ofPhosphoric Acid (food grade acid). Follow themanufacturer’s directions for mixing, use, etc. Refer tothe “Cleaning Water Coil”, Figure 28 on page 39. Theacid solution can be introduced into the heat pump coilthrough the hose bib A. Be sure the isolation valves areclosed to prevent contamination of the rest of thesystem by the coil. The acid should be pumped from abucket into the hose bib and returned to the bucketthrough the other hose bib B. Follow the manufacturer’sdirections for the product used as to how long thesolutionis to be circulated, but it is usually circulatedfor a period of several hours.


LAKE AND POND INSTALLATIONS

Lakes and ponds can provide a low cost source of waterfor heating and cooling with a ground water heat pump.Direct usage of the water without some filtration is notrecommended as algae and turbid water can foul thewater to freon heat exchanger. Instead, there have beenvery good results using a dry well dug next to the waterline or edge. Normal procedure in installing a dry wellis to backhoe a 15 to 20 foot hole adjacent to the bodyof water (set backhoe as close to the water’s edge aspossible). Once excavated, a perforated plastic casingshould be installed with gravel backfill placed aroundthe casing. The gravel bed should provide adequatefiltration of the water to allow good performance of theground water heat pump.

The following is a list of recommendations to followwhen installing this type of system (Refer to Figure 29on page 40):

A. A lake or pond should be at least 1 acre (40,000 asquare feet) in surface area for each 50,000 BTUs ofground water heat pump capacity or have 2 timesthe cubic feet size of the dwelling that you aretrying to heat (includes basement if heated).

B. The average water depth should be a least 4 feet andthere should be an area where the water depth is atleast 12 to 15 feet deep.

C. If possible, use a submersible pump suspended inthe dry well casing. Jet pumps and other types ofsuction pumps normally consume more electricalenergy than similarly sized submersible pumps.Pipe the unit the same as a water well system.

D. Size the pump to provide necessary GPM for theground water heat pump. A 12 GPM or greaterwater flow rate is required on all modes when usedon this type system.

E. A pressure tank should be installed in dwelling to beheated adjacent to the ground water heat pump. Apressure switch should be installed at the tank forpump control.

F. All plumbing should be carefully sized tocompensate for friction losses, etc., particularly ifthe pond or lake is over 200 feet from the dwellingto be heated or cooled.

G. Keep all water lines below low water level andbelow the frost line.

H. Most installers use 4 inch filed tile (rigid plastic orcorrugated) for water return to the lake or pond.

I. The drain line discharge should be located at least100 feet from the dry well location.

J. The drain line should be installed with a slope of 2inches per 10 feet of run to provide completedrainage of the line when the ground water heatpump is not operating. This gradient should alsohelp prevent freezing of the discharge where thepipe terminates above the frost line.

K. Locate the discharge high enough above high waterlevel so the water will not back up and freeze insidethe drain pipe.

FIGURE 28CLEANING WATER COIL

ISOLATION VALVE

HOSE BIB (A)

ISOLATION VALVE

HOSE BIB (B)

PUMP

TO WATER COIL

FROM WATER COILMIS-1570

Manual 2100-418

Page 40

FIGURE 29WATER WELL SYSTEM

12’ to 15’

LAKEor

POND

WATER LEVEL

GRAVEL FILL

WELL CAP

ELECTRICAL LINE

PITLESS ADAPTER

TO PRESSURETANK

SUBMERSIBLEPUMP

PERFORATEDPLASTIC CASING

DROP PIPE

WATER SUPPLYLINE

15’ to 20’DEEP

MIS-1607


COOLING TOWER / BOILER APPLICATIONThe cooling tower and boiler water loop temperature isusually maintained between 50° F to 100° F to assureadequate cooling and heating performance.

In the cooling mode, heat is rejected from the unit intothe source water loop. A cooling tower providesevaporative cooling to the loop water thus maintaining aconstant supply temperature to the unit. When utilizingopen cooling towers chemical water treatment ismandatory to ensure the water is free from corrosiveminerals.

It is imperative that all air be eliminated from thesource closed loop side of the heat exchanger to insureagainst fouling.

CAUTIONWater piping exposed to extreme low ambienttemperatures are subject to freezing.

Units are equipped with female pipe thread fittings.Consult the specification sheets for sizes. Teflon tapesealer should be used when connection to the unit toinsure against leaks and possible condenser fouling. Donot overtighten the connections. Flexible hoses shouldbe used between the unit and the rigid system to avoidpossible vibration. Ball valves should be installed inthe supply and return lines for unit isolation and unitwater flow rate balancing.

Pressure / temperature ports are recommended in bothsupply and return lines for system flow balancing.Water flow can be accurately set by measuring therefrigerant to water heat exchangers water side pressuredrop. See Table 10 for water flow and pressure dropinformation.

WARNINGThin ice may result in the vicinity of thedischarge line.

For complete information on water well systems andlake and pond applications, refer to Manual 2100-078available from your distributor.

L. Where the local conditions prevent the use of agravity drainage system to a lake or pond, you caninstead run standard plastic piping out into the pondbelow the frost and low water level.

In the heating mode, heat is absorbed from the sourcewater loop. A boiler can be utilized to maintain theloop at the desired temperature. In milder climates a“flooded tower” concept is often used. This conceptinvolves adding makeup water to the cooling towersump to maintain the desired loop temperature.

TABLE 10WATER FLOW AND PRESSURE DROP

MPG

D242WQ D203WQ,D124WQ,D163WQ

D184WQ D106WQ

GISP .dH.tF GISP .dH.tF GISP .dH.tF GISP .dH.tF

3 00.1 13.2

4 24.1 82.3 00.1 13.2

5 38.1 22.4 34.1 03.3 08.1 51.4

6 42.2 71.5 68.1 92.4 82.3 75.7

7 66.2 41.6 03.2 13.5 77.4 10.11

8 37.2 03.6 62.6 64.41 03.3 36.7

9 57.7 09.71 03.4 49.9

01 42.9 43.12 00.5 55.11

11 00.6 68.31

21 00.7 71.61

31 02.8 59.81


SERVICE

SERVICE HINTS

1. Maintain clean air filters at tall times. Also, do notto needlessly close off supply and return airregisters. This reduces air flow through the system,which shortens equipment service life as well asincreasing operating costs.

2. Check all power fuses or circuit breakers to be surethat they are the correct rating.

UN-BRAZING SYSTEM COMPONENTS

If the refrigerant charge is removed from a scrollequipped unit by bleeding the high side only, it issometimes possible for the scrolls to seal, preventingpressure equalization through the compressor. Thismay leave low side shell and suction line tubingpressurized. If the brazing torch is then applied to thelow side while the low side shell and suction linecontains pressure, the pressurized refrigerant and oilmixture could ignite when it escapes and contacts thebrazing flame. To prevent this occurrence, it isimportant to check both the high and low side withmanifold gauges before un-brazing.

WARNINGBoth the high and low side of the scrollcompressor must be checked with manifoldgauges before un-brazing systemcomponents. Failure to do so could causepressurized refrigerant and oil mixture to igniteif it escapes and contacts the brazing flamecausing property damage, bodily harm ordeath.


MOTPMYS ERUDECORP/ESUAC.gnitratsnehwylthgilsskcorrotoM % MCIrofpu-tratslamronsisihT

tratst'nowrotoM

% tnemevomoN % rotomtarewopkcehC

% rotomta)CotRCAV42(egatlovwolkcehC

% rotomta)C,R,W,Y,G(snoitcennocegatlovwolkcehC

% ssenrahrotomnosrotcennocnisnipdetaesnurofkcehC

% G-RneewtebrepmujyraropmetahtiwtseT

% tfahsthgitrofrotomkcehC

% nuR kcehCerutisoM

% tratst'nowtub,skcorrotoM % tnuomrotomtnailpmocroesoolrofkcehC

% tfahsnothgitsileehwrewolberusekaM

gniebelihwnwoddnapusetallicsorotoMrewolbfoffodetset % .tfahsnodaolonhtiwetallicsootrotomroflamronsitI

% tenibacforewolbysioN % .cte,slenap,gnisuohrewolbesoolrofkcehC

% ?deepsrewolbhgihgnitaerccitatshgiH– ,stcudnismaeshguorhtgniltsihwriarofkcehC

.slenaprostenibac– noitamrofedtcud/tenibacrofkcehC

% )deeps(MFChgihta"sffup"ro"stnuH" % ?"gniffup"ecuderretlifrolenapgnivomerseoD

– noitcitserecudeR

– wolfriamumixamecudeR

erutsioMfoecnedivE% dnaderuccosahnoitcnuflamfoeruliafrotoM

tneserpsierutsiom% mrofrepdnarotomecalpeR kcehCerutsioM

% revomriaedisnitneserperutsiomfoecnedivE % kcehCerutsioMmrofreP

OD T'NOD% snoitcennocdnagniriw,slortnoc,rotomtuokcehC

rotomgnicalpererofebylhguoroht% dabsirotomehtemussayllacitamotuA

% ;nitegt'nacretawosnwodsrotcennoctneirO"spoolpird"llatsni

% snoitsopksolc'o4dna7evobasrotcennocetacoL

% srebmunledomlortnocdnarotomdezirohtuaesUtnemecalperrof

% rehtonahtiwrebmunledomlortnocforotomenoecalpeR)tnemecalperdezirohtuanasselnu(

% :muminimaoterusserpcitatspeeK % H"2/1evahemoS.sretlifporderusserphgihesU 2 !pordO

– sretlifcitatswol,ycneiciffehgihdnemmoceR % snruterdetcirtseresU

– naelcsretlifgnipeekdnemmoceR– ,citatsmuminimrofkrowtcudngiseD

trofmocmumixam– krowtcuddnemmocerdnarofkooL

.tnemecalperni,yrassecenerehw,tnemevorpmi

TROUBLESHOOTING ECM BLOWER MOTORS

CAUTIONDisconnect power from unit before removing or replacing connectors, or servicing motor.Wait at least 5 minutes after disconnection power before opening motor.


MOTPMYS ERUDECORP/ESUACyllacitarresnurtubstratsrotoM

% tnettimretnironwoddnapuseiraV % "gas"ronoitairavrofegatlovenilkcehC% ;rotomta)C,R,W,Y,G(snoitcennocegatlovwolkcehC

srotcennocssenrahrotomnisnipdetaesnu% deepselbairavni(dnammocMFCcitarrerof"kB"kcehC

snoitacilppa% ?tatsomreht-slortnocmetsystuokcehC% mrofreP kcehCerutsioM

% )deeps(MRChgihta"sffupro"stnuH" % ?"gniffup"ecuderretlifrolenapgnivomerseoD

– noitcirtserecudeR

– wolfriamumixamecudeR

% roloocrofllacmetssysetipsedMFCwoltasyatSMFCtaeh

% snoitcennocdnaseriw)tatsomreht(egatlovwolkcehC

% siyaledlitnutiaw-edomyaladnitonsinafyfireVetelpmoc

% rotomtadetcennocton/gnissim"R"kcehctnemecalperlortnoc/rotommrofreP

% MFChgihtasyatS % rotomtadetcennocton/gnissim"R"

% etelpmocemityaledlitnutiaw-?edomyaladninafsI

% ffotuhst'nowrewolB % ?WroY,GotnislortnocmorfegakaeltnerruC– etatsdilosrotatsomrehtdehctiwscairTrofkcehC

yaler

NOTPMYS ERUDECORP/ESUACesionevissecxE % .esionrotomrotcud,tenibac,esionriasitifienimreteD

.yrssecenfiremotsucweivretnI

% esioNriA % ?deepsrewolbhgihgnitaerccitatshgiH

– ?ylreporpteswolfriasI– ?nwodwolsotrewolbesuacretlifgnivomerseoD

retlifecalper/kcehC– retlifporderusserpwolesU

– snoitcritsertcudtcerroc/kcehC

OD T'NOD% ylesiwtnempuqeehteziS % wolfriawolhtiwetasnepmocnehtmetsysezisrevO% rotomgnitresnierofebnoitatneirokcehC

srotcennoc% sdrawkcabrotcennocrewopnigulP

% sgulpecroF

ERUDECORPKCEHCERUTSIOM ERUDECORPKCEHCTROFMOC

% "nwod"detneiroerasrotcennoC % sgnitteswolfriareporpkcehC

% rotomrednu"poolpird"htiwsessenrahegnarrA % esiontsewolroferusserpcitatswoL

% ?deggulpniardetsnednoC % MFCnafsuounitnocwolteS

% )yticapactnetalhcumoot(wolfriawolrofkcehC % stinugniloocdeeps-2dnatatsidimuhesU

% noitidnocdegrahcrednurofkcehC % MFCetalugertahtMCIrofdengisedslortnocgninozesU

% tenibacdnastcudnrtuerniskaelgulpdnakcehC % ?noitacoldabnitatsomrehT

Manual 2100-418

Page 45

Heat Gen.

Pow

er F

ailu

re

Blo

wn

Fus

e or

Trip

ped

Bre

aker

Fau

lty W

iring

Loos

e T

erm

inal

s

Low

Vol

tage

Def

ectiv

e C

onta

cts

in C

onta

ctor

Com

pres

sor

Ove

rload

Pot

entia

l Rel

ay

Run

Cap

acito

r

Sta

rt C

apac

itor

Fau

lty W

iring

Loos

e T

erm

inal

s

Con

trol

Tra

nsfo

rmer

Low

Vol

tage

The

rmos

tat

Con

tact

or C

oil

Pre

ssur

e C

ontr

ols

(Hig

h or

Low

)

Indo

or B

low

er R

elay

Dis

char

ge L

ine

Hitt

ing

Insi

de o

f She

ll

Bea

rings

Def

ectiv

e

Sei

zed

Val

ve D

efec

tive

Mot

or W

ingi

ngs

Def

ectiv

e

Ref

riger

ant C

harg

e Lo

w

Ref

riger

ant O

verc

harg

e

Hig

h H

ead

Pre

ssur

e

Low

Hea

d P

ress

ure

Hig

h S

uctio

n P

ress

ure

Low

Suc

tion

Pre

ssur

e

Non

-Con

dens

able

s

Une

qual

ized

Pre

ssur

es

Sol

enoi

d V

alve

Stu

ck C

lose

d (H

tg)

Sol

enoi

d V

alve

Stu

ck C

lose

d (C

lg)

Sol

enoi

d V

alve

Stu

ck O

pen

(Htg

or

Clg

)

Leak

ing

Def

ectiv

e V

alve

or

Coi

l

Plu

gged

or

Res

tric

ted

Met

erin

g D

evic

e (H

tg)

Sca

led

or P

lugg

ed C

oil (

Htg

)

Sca

led

or P

lugg

ed C

oil (

CLg

)

Wat

er V

olum

e Lo

w (

Htg

)

Wat

er V

olum

e Lo

w (

Clg

)

Low

Wat

er T

empe

ratu

re (

Htg

)

Plu

gged

or

Res

tric

ted

Met

erin

g D

evic

e (C

lg)

Fin

s D

irty

or P

lugg

ed

Mot

or W

indi

ng D

efec

tive

Air

Vol

ume

Low

Air

Filt

ers

Dirt

y

Und

ersi

zed

or R

estr

icte

d D

uctw

ork

Aux

illar

y H

eat U

pstr

eam

of C

oil

Compressor Will Not Run No Power at Contactor

� � � � � � � � � � � � �

Compressor Will Not Run Power at Contactor

� � � � � � � � � � �

Compressor "Hums" But Will Not Start

� � � � � � � � � � �

Compressor Cycles on Overload � � � � � � � � � � � � � � � � � � � � � � � � � �

Thermostat Check Light Lite-Lockout Relay

�

Compressor Off on High Pressure Control � � � � � � � � � � � � � � �

Compressor Off on Low Pressure Control � � � � � � � � �

Compressor Noisy � � �

Head Pressure Too High � � � � � � � � � � � � � �

Head Pressure Too Low � � � � � � � �

Suction Pressure Too High � � � �

Suction Pressure Too Low � � � � � � � � � � � � �

I.D. Blower Will Not Start � � � � � � � � � �

I.D. Coil Frosting or Icing � � � � � � � �

High Compressor Amps � � � � � � � � � � � � � � � � � � �

Excessive Water Usage � � �

Compressor Runs Continuously – No Cooling

� � � � � � � � � � �

Liquid Refrigerant Flooding Back To Compressor

� � � � � � �

Compressor Runs Continuously – No Heating

� � � � � � � � �

Reversing Valve Does Not Shift � � � � �

Liquid Refrigerant Flooding Back To Compressor

� � � � � � � �

Aux. Heat on I.D. Blower Off � � � � � � �

Excessive Operation Costs � � � � � � � � � � � � � � �

Ice in Water Coil � � � � � � �

Hea

ting

Cyc

le

AUX.

Coo

ling

Cyc

le

Hea

ting

or C

oolin

g C

ycle

s

Indoor Blower Motor and Coil

INDOOR SECTIONPOWER SUPPLYWater

SolenoidRev. Valve Water Coil

WATER COIL SECTION

Line Voltage Control Circuit Compressor Refrigerant System

QUICK REFERENCE TROUBLESHOOTING CHART FOR WATER TO AIR HEAT PUMP

�

�

DENOTES COMMON CAUSE

DENOTES OCCASIONAL CAUSE


GROUND SOURCE HEAT PUMP PERFORMANCE REPORT

This performance check report should be filled out by installer and retained with unit.

DATE: TAKEN BY:

1. UNIT: Mfgr Model # S/N

THERMOSTAT: Mfgr Model # P/N

2. Person Reporting

3. Company Reporting

4. Installed By Date Installed

5. User’s (Owner’s) Name

Address

6. Unit Location

WATER SYSTEM INFORMATION

7. Open Loop System (Water Well) Closed Loop System

A. If Open Loop where is water discharged?

8. The following questions are for Closed Loop systems only

A. Closed loop system designed by

B. Type of antifreeze used: % Solution

C. System type: Series Parallel

D. Pipe Material Nominal Size

E. Pipe Installed:

1. Horizontal Total length of pipe ft

No. pipes in trench Depth bottom pipe ft

2. Vertical Total length of bore hole ft


THE FOLLOWING INFORMATION IS NEEDED TO CHECK PERFORMANCE OF UNIT

FLUID SIDE DATA Cooling ** Heating

9. Entering fluid temperature F 10. Leaving fluid temperature F 11. Entering fluid pressure PSIG 12. Leaving fluid pressure PSIG 13. Pressure drop through coil PSIG 14. Gallons per minute through the water coil GPM 15. Liquid or discharge line pressure PSIG 16. Suction line pressure PSIG 17. Voltage at compressor (unit running) V 18. Amperage draw at line side of contactor A 19. Amperage at compressor common terminal A 20. * Suction line temperature 6” from compressor F 21. * Superheat at compressor F 22. * Liquid line temperature at metering device F 23. * Coil subcooling F

INDOOR SIDE DATA Cooling ** Heating

24. Dry bulb temperature at air entering indoor coil F 25. Wet bulb temperature of air entering indoor coil F 26. Dry bulb temperature of air leaving indoor coil F 27. Wet bulb temperature of air leaving indoor coil F 28. * Supply air static pressure (packaged unit) WC 29. * Return air static pressure (packaged unit) WC 30. Other information about installation

** When performing a heating test insure that second stage heat is not activated. * Items that are optional

instructions models: qw242d qw302d qw361d qw421d …

Documents