pnes4 and pnhs4 (enersaver “b” design – type 45)

PNES4 and PNHS4 (EnerSaver “B” Design – Type 45)Replacement Chassis

Chassis Side Seal(Left-Hand)

Condenser CoilBaffle Seal

Existing Louver

Existing Wall Sleeve

Wall Sleeve Chassis Support Rail

Wall SleeveBottom Seal

Chassis Side Seal(Right-Hand)

Chassis

ChassisTop Seal

Group: PTACPart No.: 910109977Date: June 2010

Installation & Maintenance Data IM 1080

© 2010 McQuay International

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Nomenclature ..................................................................... 2Inspection ........................................................................... 3 Wall Sleeve Preparation ..................................................... 4 Chassis Preparation ........................................................... 4Installing The Condenser Coil Baffle Seal .......................... 4Additional Alteration With Heat Pump ................................ 5Chassis Installation ............................................................ 5Equipment Start-Up ............................................................ 6Electrical Service ................................................................ 6Scheduled Maintenance .................................................... 6Recommended Spare Parts ............................................... 7Troubleshooting Chart .................................................... 8-9Approximate Ship Weights ................................................. 9

Wiring Diagrams .......................................................... 10-12PNES4 (ENR) Type 45 Replacement (Electric Heat) Manual Changeover Control............................................. 10PNHS4 (ENH) Type 45 Replacement (Heat Pump with Supple-mental Electric Heat)Manual Changeover Control..............................................11PNES4 EnerSaver “B” Design Type 45 Replacement (Hydronic Heat with Heat Fan Lockout) Manual Changeover Control............................................. 12

Table of Contents

Model Nomenclature

Product CategoryP= PTAC

Product Identifier NES = Enersaver Air Conditioner w/ Electric or Hydronic HeatNHS = Enersaver Heat Pump w/ Electric Heat

Design Series 3 = A design - Enersaver4 = B design Enersaver

Nominal Capacity - Btuh009 = 9,000012 = 12,000015 = 15,000 (AC Only)

VoltageA = 115 - 60 - 1 (Hydronic AC Only)C = 208 - 60 - 1G = 230 - 60 - 1J = 265/277 - 60 - 1

Coil Options Z = None

Heating Options00 = None35 = 2.5 kW nominal41 = 3.5 kW nominal44 = 4.0 kW nominal62 = Hydronic - Normally Open Valve (hot water or steam) for EnerSaver “A” Design63 = Hydronic - Normally Closed Valve (hot water or steam) for EnerSaver “B” Design

Hand OrientationZ = Not Applicable

Product Style1 = 1st Style Change

SKU A = StockB = Standard DeliveryC = Extended Leadtime

Color 1 = Antique Ivory

Power Connection C = Cord

Return Air/ Outdoor Air 14 = Bottom

DischargeAR = Flat Top

P NES 3 009 C Z 35 Z 12 AR 14 C 1 A 1

Model

Controls12 = Unit Mounted Manual Changeover (MCO)13 = Remote Thermostat Setup24 = Unit Mounted Manual Changeover (MCO) & Night Setback (NSB)

Note: Availability of voltages, heating options, and controls may vary amongst unit sizes. Consult your McQuay representative.

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InstallationThe installation of this equipment shall be in accordance with the regulations of authorities having jurisdiction and all appli-cable codes. It is the responsibility of the installer to determine and follow the applicable codes. Sheet metal parts, self-tap-ping screws, clips and such items inherently have sharp edges, and it is necessary that the installer exercise caution. This equipment is to be installed only by an experienced installation company which employs trained personnel.

Figure 1: Exploded View of Retrofit Kit P/N 063028801

Wall Sleeve Chassis Support Channels

Condenser Coil Baffle Seal

Chassis Side Seal (Left-Hand)

Chassis Top Seal

Required FastenersChassis Top Seal

Chassis Top Seal

Chassis Side Seal(Right-Hand)

Condenser Coil Baffle Seal

Wall Sleeve Bottom Seal

The PNES4 and PNHS4 (ENR/ENH-45) retrofit kit is packaged in a separate carton and shipped in addition to the chassis. Careful inspection should be made of the retrofit kit package to insure all components have been included. The retrofit kit should include the following pieces:

No. of Parts Pieces1. Wall sleeve bottom seal ................................................ 2 2. Wall sleeve chassis support channel ............................ 23. Chassis side seal (RH & LH 1 each) ............................ 34. Chassis top seal ........................................................... 35.Condenser coil baffle seal ............................................ 106. Sheet metal screws ...................................................... 27. Tinnerman clips ............................................................. If any of these pieces are missing from the retrofit kit package notify McQuay International, Service Parts Dept., 13600 Industrial Park Blvd., Plymouth, MN 55440.

InspectionWhen the equipment is delivered all items should be checked carefully against the bill of lading to be sure all crates and cartons have been received. All units should be carefully inspected when received. If any damage is noticed, the carrier should make proper notification on the delivery receipt acknowledging the damage. The carrier should also complete a carrier inspection report and forward it to McQuay International. The unit nameplate should be checked to be sure the voltage agrees with the power supply available. The PNES4 and PNHS4 ENR/ENH-45 is a replacement chassis for Singer and American Standard Type 45 units. It is designed to be installed into the existing Type 45 wall sleeve using the retrofit kit P/N 063028801. Installation of this retrofit kit is described herein. Do not install the chassis until the retrofit kit has been properly installed on the chassis and in the wall sleeve.

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Wall Sleeve Preparation

Disconnect all power to the unit before continuing.

1. Remove existing chassis from wall sleeve and discard.2. Clean existing wall sleeve to remove any residual dirt and

debris. If any rust exists, remove it with a wire brush or steel wool then coat the spot(s) with rust inhibiting paint.

3. Inspect the condition of the wall sleeve and repair as required. Be sure all wall sleeve gaskets are intact and repair as needed.

4. Locate the retrofit kit package and take out the wall sleeve bottom seal and two chassis support channels.

5. Place the square edge of the chassis support channels into the weephole slots of the existing wall sleeve. The slotted ends of the chassis supports will extend toward the roomside of the wall sleeve.

6. Place a heavy bead of RTV silicone sealant (or equivalent) to the leading edge of the wall sleeve bottom seal. The leading edge, is that edge that will be closest to the outdoor side of the wall sleeve.

7. Place the wall sleeve bottom seal into the wall sleeve so that the leading edge engages the slots of the chassis support channels. Position the leading edge of the bottom seal approximately 10⅞ inches from the rear of the wall sleeve. Be sure the black rubber gasket of the wall sleeve bottom seal is facing upward. Press down firmly on the chassis bottom seal to insure a positive seal.

8. Drill a 1/8" diameter hole in each end of the wall sleeve using the holes of the wall sleeve bottom seal as a template.

Drilling holes elsewhere in the wall sleeve will destroy the weather integrity and could interfere with chassis installation.

9. Fasten the wall sleeve bottom seal to the wall sleeve using the (2) #8 x 3/8 sheet metal screws supplied.

10. Caulk the ends of the wall sleeve bottom seal with RTV silicone sealant (or equivalent) to insure weather integrity. The bottom seal must be completely water tight to prevent condensate from entering the indoor space.

Figure 2: Installation of Wall Sleeve Bottom Seal

Chassis Preparation1. Remove the chassis from the carton and place it on the

floor near the wall sleeve.2. Remove the remaining retrofit kit parts from the package

and place them near their final installation position, as shown on the front cover.

3. Locate the two side seals and mount them on the sides of the chassis so that the gasket faces the outdoor side. This requires that the existing screws be removed and reinstalled through the side seals. Note also that the gasket of these side seals extends beyond one end of each seal. This gasket extension must be positioned towards the top.

4. Locate the three chassis top seal pieces and assemble them for installation using the screws provided. If the unit has electric heat, all (3) parts will be used. If the unit has hydronic heat, only the front and right side pieces will be used.

5. Align the top seal with the perimeter of the chassis discharge plenum and drill 1/8" diameter holes in the discharge plenum flange using the top seal as a template.

6. Fasten the top seal to the discharge plenum flange.

Note: Pop rivets must be used to secure the sides of this top seal to the plenum flange to prevent interference with the existing seals of the wall sleeve.

Screws may be used to attach the front portion of the top seal as no interference will occur.

Note: For hydronic units, the left-hand piece of the top seal is discarded.

Installing the Condenser Coil Baffle Seal1. Assemble the three pieces so as to form a “U” shape as

shown in Figure 1. Fasten these pieces together using the screws provided.

2. Position the assembled seal against the condenser coil so that the tangs of the assembly engage between the coil and the chassis drain pan. The gasket of the condenser coil baffle seal should rest tightly against the end plates of the condenser coil. The installed condenser coil baffle seal is shown in Figure 3.

3. Using the two Tinnerman clips supplied, attach the condenser coil baffle seal to the condenser coil end plates 3" to 4" from the top of the coil.

Figure 3: Condenser Coil Baffle Seal

Raised RubberGasket

Existing Wall Sleeve

Wall SleeveBottom Seal

Seal Along This Edge

Mounting Screw

Chassis Support Channels

CondenserCoil

Chassis Top Seal

Right-HandSide Seal

TinnermanClip

Condenser CoilBaffle Seal

Tang

Outside

CAUTION!

CAUTION!

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Additional Alteration with Heat Pump ModelsHeat pumps generate condensate during the heating season that must be disposed of using a drain kit. The drain kit P/N 105542401 is available from the factory, for field installation. The following modifications must be made to the retrofit kit and existing wall sleeve when using heat pumps.1. Using a hacksaw, Sawsall, or tin snips, cut a 5/8" x 5/8"

slot in the left-hand side seal of the retrofit kit. This slot should be located 1/2" from the bottom of the wall sleeve. Align this slot with the flange of the wall sleeve and cut an identical second slot in flange of the wall sleeve.

2. Insert the copper tube into the wall sleeve. Be certain that the drain tube extends well into the wall sleeve and maintains a downward pitch to assure proper drainage.

3. The drain kit is designed to allow condensate to run into the wall sleeve where it can be carried away through a condensate drain system. To drain the condensate directly to the outside, extend the drain tube using a second 5/8" flexible polymer connection and a piece of copper tube cut to the proper length.

4. Caulk around the tube that protrudes through the wall sleeve side seal.

5. When the chassis is slid into place, be sure the drain tubes engage properly, as shown in Figure 4.

6. Test drain operation by pouring approximately (2) quarts of water into drain and assure proper removal.

Figure 4: Optional Condensate Drain Kit P/N 105542401

Chassis InstallationBefore installing the chassis, make the following visual and mechanical inspection:1. Rotate the condenser fan and evaporator fans to be sure

they spin freely. If they do not, make the necessary adjustments or remove any obstruction.

2. Check the evaporator coil fins and the condenser coil fins for damage. If any damage is minor, straighten fins with the proper fin comb. If the damage is extensive, notify the carrier immediately.

3. Check all fasteners and tighten as required.4. Do not remove or loosen hold-down bolts on compressor

as they are properly adjusted at the factory.5. Remove the cardboard base from the chassis and discard.

5/8" Drain Tube

Wall Sleeve

5/8" Flexible Polymer Connection

Chassis

6. When installing the size 15 chassis, be sure to remove the shipping angles. Instructions for removal of these angles can be found attached to the top of the chassis.

Once the chassis inspection has been completed, proceed as follows:1. Align the chassis with the existing wall sleeve making

sure nothing is obstructing the opening to the wall sleeve.2. Slide the chassis into the sleeve until it seats against the

side seals of the wall sleeve.

Do not push on the coil surface, control box or scroll housings when inserting the chassis into place.

3. For units with 115V, 208V and 230V power cords, insert the cord set through the opening in the base of the wall sleeve at the right hand side.

4. Set the manual damper to the “open” or “closed” position as desired. For units equipped with the automatic damper, place the switch to the “auto” or "closed" position as desired. In the "auto" position, the damper is open whenever the indoor fan motor is running. The "auto/closed" switch is located at the bottom left-hand corner of the chassis.

5. For hydronic units, plug in the valve wires. A cord and plug is supplied to match its existing receptacle.

6. For heat pump chassis, connect the drain tube of the chassis with the drain pipe installed in the wall sleeve as shown in Figure 4.

7. Install the evaporator drain pan cover on the indoor side of the drain pan. This is done by setting the cover in place and firmly pressing in and down on the cover until it drops into place covering the exposed portion of the indoor drain pan. Do Not Force: Evaporator drain pan cover into drain pan as it may block condensate drain channels.

8. For units equipped with 115V, 208V or 230V power cords, insert the plug into the receptacle. Excess cord should be coiled neatly beneath the unit or in the subbase.

9. For 265V units, make electrical connections to the pigtails located inside the control box. A 7/8" diameter knockout for conduit connection is provided at the bottom of the control box.

10. Insert the existing filter or replace with a new filter.11. Replace the front panel making sure the tangs at the

bottom of the front panel engage properly in the wall sleeve. Swing the front panel upward and lift slightly to engage the front panel tangs with the slots in the existing wall sleeve.

CAUTION!

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Equipment StartupNote: Initial startup of the lncremental® conditioners by experienced personnel is usually the responsibility of the installing contractor. This startup consists of inspecting and operating the equipment for all functions at the time of initial installation, and making necessary adjustments. It also includes demonstrating its proper operation to the owner or his agent. Note that unless otherwise specifically agreed to in writing, McQuay includes no field labor, startup service or the like in the price of its equipment. After the equipment leaves the factory, it may become damaged or maladjusted during transportation or on the job. Sometimes wires are disconnected accidentally, or fan motors move on their bases due to rough handling, causing fans to strike. The correction of such conditions is part of the startup.

Before starting equipment, make certain that:1. Correct voltage has been supplied to the equipment.2. The electric plug from the control box has been inserted

into the receptacle. (If applicable).During startup (applies only to standard equipment):1. Set manual ventilation damper to OPEN or CLOSED

position as required by owner. Set “auto-off” switch as required if unit is equipped with electric fresh air damper.

2. Push HIGH button to preselect fan speed; push HEAT button. Move thermostat to the extreme heating position (counterclockwise). Push LOW button; fan should change to low speed. If it's a heat pump, the compressor and outdoor fan should start. If it has hydronic heat, the valve should open.

3. Push HIGH button to preselect fan speed; push COOL button. Move thermostat to the extreme cooling position (clockwise). Compressor and outdoor fan should cycle on and off as the thermostat requires. Push LOW button; fan should change to lower speed. Outdoor fan should be on whenever compressor operates.

4. Push OFF button. Fan should stop, and neither heater nor compressor should continue to operate.

Electrical ServiceAll wiring should be done in accordance with all local and National Electrical Code requirements. The conditioners are supplied as follows:

Type 45 Replacement Electrical Heating Unit:1. 208V or 230V models are supplied with an attachment

cord and plug which exit from beneath the conditioner on the control side. The cord has a usable length of 60" from where it exits the conditioner. The use of an extension cord is not recommended. Refer to the chassis nameplate to determine circuit ampacity and overcurrent protection. Time delay fuses are recommended to avoid nuisance tripping. The receptacle is generally mounted beneath the conditioner, on or recessed in the wall so that it is concealed by the conditioner overhang. The space under the conditioner must be at least 3" high.

2. On 265V models, the chassis is supplied with no cord. A knockout is furnished in the control box to allow for field supplied permanent connection. Electrical connections are made to pigtails inside the control box.

3. Hydronic models include valve wiring and a plug to match the existing valve.

Scheduled MaintenanceIncremental conditioners are built to last. With proper care, the unit should provide uninterrupted service for many years. Scheduled maintenance of this equipment, as described below, is the key to the equipment's longevity.

Air Filters – Air filters must be cleaned at regular intervals. Twice annually may be adequate in some areas while twice monthly may be required in others. Areas with high dirt and lint content or heavy usage of units require more frequent filter maintenance than those areas of relatively clean operating or low usage conditions. Unit malfunction may occur if air filters are not kept clean. Rinse filters with hot water and a mild detergent. Let dry and oil lightly to enhance dust collecting ability. Chassis – It is recommended that every year the chassis be removed for a thorough checkup. This should be completed as follows:

1. Unplug unit from power source.2. Remove front panel.3. Remove chassis from cabinet and move it to the

maintenance department. Replace with spare chassis or weather plate.

4. Check all seals and insulation and repair as required.5. Check all wiring and controls for hazardous conditions.6. Thoroughly clean discharge grilles.7. Cover motors and control module with watertight

material and wash evaporator coil, condenser coil and base pan using hot water and a mild soap. Do not use a harsh detergent for it may corrode the aluminum fins.

8. Clean condensate drain and clear weep holes.9. Dry equipment thoroughly, especially electric parts and

insulation.10. Clean any rust spots with steel wool and paint with rust

inhibiting paint.11. Clean insulation or replace if necessary.12. Check all fasteners and tighten as required.13. Clean and inspect damper door and linkage.14. Test run chassis before re-installing or returning to spare

parts stock.

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Recommended Spare PartsAn inherent advantage of the Incremental system is that failure of any one part affects only one Incremental conditioner and does not interrupt the operation of the rest of the system. A further advantage is that a failed part can be quickly and easily replaced, thus minimizing the inoperative time of the equipment. This is so, however, only if a replacement part is quickly available. In order to replace a failed part quickly and keep all Incremental conditioners in good operating condition, AAF-McQuay Incorporated recommends that at the time Incremental conditioners are purchased, owners arrange for a small stock of replacement parts.Where an owner carries such a stock, immediate replacement of a defective part is possible. The defective part can then be returned to the factory or one of its authorized service stations. So long as it is still in warranty, it is repaired or replaced and returned to the owner without cost for shop labor and material. Thus, the stock of replacement parts is constantly replenished. To the right is listed the kind of parts which are recommended to be carried in stock, together with the quantity of parts recommended per 100 Incremental conditioners installed.

Part Name Qty. Per 100 UnitsCooling Chassis................................................................ 1Compressor Overload Device .......................................... 1Compressor Running Capacitor ....................................... 1Conditioned Air Fan Motor ................................................ 1Condenser Fan Motor....................................................... 1Pushbutton Switch ............................................................ 2Damper Switch ................................................................. 2Thermostat ....................................................................... 2Knob for Thermostat ......................................................... 6Control Relay (if used) ...................................................... 1Damper Motor................................................................... 2Electric Resistance Heater (each size)............................. 1Touch-up Paint (1 pt. spray can)....................................... 1

For the current spare parts list, and applicable prices, see your representative or write McQuay Service, P.O. Box 1551, Minneapolis, MN 55440

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Troubleshooting ChartThese items should be checked by a qualified service technician only.

Trouble Cause Cure1. Blowers won't operate

on Cool.

2. Blowers operate on COOL, but compressor does not start.

3. Blowers run on COOL and compressor starts, but stops after a short interval.

4. Blowers run on COOL and compressor starts and runs, but compres-sor occasionally stops (on overload device).

5. Compressor starts and runs on COOL, but blowers do not run.

6. Compressor starts and runs on COOL, but fan motor starts, then stops.

7. E q u i p m e n t g i v e s electrical shock.

8. Insufficient cooling capacity.

*If equipment is in warranty.

a. No power.

b. Faulty pushbutton switch.c. Loose connections at pushbutton switch.

a. Thermostat set too high.b. Heat valve is open and heat is on.c. Low voltage.d. Faulty pushbutton switch.e. Faulty connection at pushbutton switch.f. Defective wiring to thermostat.g. Loose connections at compressor terminals.h. Wiring to compressor terminals defective.i. Loose connections in compressor overload device.j. Starting capacitor malfunctions (open circuited, short circuited or loss of capacity).k. Defective compressor motor (short circuited, open circuited,

grounded).

a. Operation of overload device due to overloaded compressor motor.

a. Low voltage due to overloaded circuits within building or throughout the local power system. Due to varying power demands, this condition might exist only at certain times during the day or on very hot days.

b. High voltage due to fluctuations in local power system; usu-ally occurs at low load periods of the day.

c. Partial short circuit in compressor motor. Under normal loading, a compressor with a partial short circuit might appear to be operating all right; increased condensing air temperature might then cause a short.

a. Faulty pushbutton switch.b. Open circuited blower motor.c. Blower rubbing against its housing.d. Bearings on blower motor seized.

e. Loose connection at pushbutton switch.

a. Operation of the internally connected overload device due to a short circuit in blower motor.

b. Rubbing of blower motor or lack of lubrication in blower motor bearings.

a. Grounded electrical circuit within chassis and/or faulty chassis ground.

a. Insufficient airflow through condenser due to: 1) Dirty condenser. 2) Obstructed louvers on outer cabinet or wall box. 3) Condenser blower/fan not running. 4) Condenser blower/fan not up to speed. 5) Condenser blower/fan slipping on motor shaft. 6) Recirculation of condenser air.b. Insufficient airflow through evaporator due to: 1) Dirty evaporator. 2) Ice on evaporator coils. 3) Dirty air filter. 4) Obstructed discharge grilles.

5) Evaporator blower motor not running. 6) Evaporator blower motor not up to speed. 7) Evaporator blower slipping on motor shaft.c. Heat load in room exceeds capacity of equipment.d. Windows and doors in room are open.e. Compressor not pumping, indicated by: 1) Low wattage. 2) Condenser not warm, evaporator only partially cool, or

not at all.

a. Check supply line fuses, circuit breakers, and be sure the power is on. Blown fuses would indicate circuit overloading, a short circuit, or a grounded condition in the circuit. Voltage supply to the equipment should be checked. Refer to the chassis nameplate for the minimum voltage.

b. Replace.c. Tighten.

a. Adjust. Rotate control knob to “Cooler.”b. Close heat valve.c. Check as above.d. Replace.e. Tighten.f. Replace.g. Tighten.h. Replace.i. Tightenj. Replace.

k. *Ship cooling chassis prepaid to nearest McQuay authorized warranty station.

a. Check voltage supply. Clean condenser inside and out. Check at outside face of condenser for recirculation of condenser air. Put air “splitters” in, if missing. Check to make sure condenser blower/fan is operating properly. Check compressor for short circuit. If defective, *ship cooling chassis to nearest McQuay authorized warranty station.

a. Run separate electric line to equipment. Consult local power company.

b. Consult local power company.

c. If confirmed, *ship cooling chassis prepaid to nearest McQuay authorized warranty station.

a. Replace.b. Replace.c. Adjust blower motor or blower wheel position.d. Replace motor

e. Tighten.

a. Replace motor.

b. Adjust blower wheel or motor or replace wheel.

a. Eliminate ground in chassis and/or check chassis ground.

a. 1) Clean. 2) Remove obstructions. 3) Check same as in the case of malfunctioning conditioner

air blower. 4) Check for correct voltage. Replace blower motor if neces-

sary. 5) Adjust blower position and tighten setscrew. 6) Correct as in #3.b. 1) Clean. 2) Turn equipment off to let ice melt. 3) Clean or replace. 4) Remove obstructions. In case of top discharge equip-

ment, make sure books, magazines, etc., are kept off the equipment.

5) Check as in #1. 6) Check for correct voltage. Replace motor if necessary. 7) Adjust blower wheel position and tighten setscrew.c. Refer to original load calculations; recalculate heat load.d. Close them.e. *Ship prepaid to nearest McQuay authorized warranty

station.

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f. Restricted capillary tube or strainer, indicated by: 1) Frost on capillary or strainer. 2) Low wattage. 3) Condenser not warm. 4) Evaporator partially frosted, only partially cool, or not

at all.

a. Thermostat set too low.b. Defective thermostat.

a. Condensate drain from evaporator to condenser plugged.b. Insulating seals on equipment damaged.c. Evaporator blower motor not up to speed.d. Evaporator blower incorrectly positioned.

a. No power.b. Faulty pushbutton switch.c. Loose connections at pushbutton switch.d. Thermostat set too low.

a. Blower rubbing against enclosure.

b. Blower motor bearings are dry.c. Refrigerant absorbed in compressor oil after extended shut-

down.d. Equipment improperly installed.e. Loose electrical components.f. Copper tubing vibrating.g. Harmonics.

h. Loose sheet metal parts.

a. No steam or hot water being applied.b. No power.

c. Faulty pushbutton switch.d. Loose connection at pushbutton switch.e. Thermostat set too high.f. Thermostat faulty.g. No power output on transformer secondary.h. Inoperative valve. 1) Steam valve N/C. 2) Hot water valve N/C.i. Outdoor temperature less than 40°F on heat pump.

Troubleshooting Chart (cont'd)These items should be checked by a qualified service technician only.

Trouble Cause Curef. *Ship prepaid to nearest McQuay warranty station.

a. Adjust.b. Replace.

a. Remove obstructions to water flow.b. Adjust or replace.c. Check for correct voltage. Replace motor if necessary.d. Adjust.

a. See #1.b. Replace.c. Tighten.d. Adjust. Rotate control knob to “Warmer.”

a. Adjust fan position on motor shaft to reposition fan motor bracket assembly.

b. Replace motor.c. Noise will disappear after equipment runs awhile.

d. Make necessary adjustments to components.e. Fasten securely.f. Adjust by bending or applying tape.g. Occasionally equipment will have noisy operation for no ap-

parent reason. Inspection has revealed no loose components that might be the source of the noise. Due to the action of the compressor, it is possible to have internal noise develop if the refrigerant tubing has become bent even slightly. To distinguish this condition from the simple rattle producing vibration caused by loose screws, nuts and other components, grasp the refrigerant tubing at various points throughout the system until a point is found where the noise is eliminated or reduced. Bend the copper tubing very gently until the noise disappears.

h. Tighten.

a. Contact building management.b. Check power supply line fuses, circuit breakers. Blown fuses

would indicate circuit overloading, a short circuit, or a grounded condition in the circuit.

c. Replace.d. Replace wire or tighten.e. Adjust rotate knob to “Warm.”f. Replace.g. Replace.h. 1) Temporarily lock valve open; replace. 2) Replace.i. Review why supplemental electric heat is NOT operating.

Notes: † This guide was prepared with standard equipment in mind. If equipment is special, it may not be entirely applicable.* If equipment is still in warranty.

**Note: Before trying to correct the noise, determine its cause: conditioned air blower, compressor or condenser blower. Operate the conditioned air blowers only. If this doesn't cause the noise, operate on cooling. Then disconnect one compressor lead. If the noise stops, the compressor is the source. If not, it is caused by the condenser blower.

8. Insufficient cooling capacity (continued).

9. Too much cooling.

10. “Sweating”

11. Blowers won't operate on HEAT.

12. **Equipment is noisy.

13. Insufficient or no heat.

Approximate Shipping Weights

PNES4 and PNHS4 (ENR/ENH) Size

007–150 Lbs.009–150 Lbs.012–150 Lbs.015–160 Lbs.

Retrofit Kit–10 Lbs.

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Wiring DiagramPNES4 (ENR) Type 45 Replacement (Electric Heat) Manual Changeover Control

LegendSymbol Designation

Field Connection Option Wire Field Wire Quick Connect

C1/3 CapacitorCB Circuit Breaker (Option) (120/265V-1 Pole) (208/230V-2 Pole)HL Hi LimitHTR Electric HeaterM1 Motor-Room AirM2 CompressorM3 Motor-Outdoor Air FanM4 Motor-Vent (Option)OL Compressor OverloadP1 Plug-ChassisP2 Plug-Low Voltage

Wire NutHP High Pressure CutoutP5 Plug-HP CutoutR2 Relay-CoolingR3 Relay-HeatingR4 Relay-FanR5 Relay-SetbackR6 Relay-InterlockR7 Relay-HP CutoutRV Valve-ReversingS1 Switch-Push ButtonS2 Switch-DamperT Transformer-Class 2TB1 Terminal BlockTB3 Terminal BlockTC1 Thermostat-Room AirTC2 Thermostat-SetbackTC3 Thermostat-Low Ambient LockoutTC4 Thermostat-Low LimitTC5 Thermostat-FreezeDOB Relay-DOBTD1 Relay-Remote Setback (Option)TD2 Relay-Time Delay

Room Air Motor Wires Unit Size Hi Lo 009B (120/265) BLK RED 009B (208) BLK BLU 009B (230) ORG RED 012B (208/265) BLK BLU/RED 015B BLK BLU

Outdoor Air Motor Wires Unit Size Color 009B (208) RED 009B (230/265) BLK 012B-015B RED/BLK (208/230) 012B-015B (265) BLK

Sequence of OperationHeating With “HEAT” button depressed, elements cycle to maintain

thermostat setting.

Cooling With “COOL” button depressed, compressor and condenser fan cycle to maintain thermostat setting.

Room Fan Speed With fan switch on control panel set at “HI” or “LO”, room fans run continuously at selected speed.

Low Ambient TC3 prevents operation of cooling when outdoor ambientLockout drops below 40°F.Thermostat(Optional)

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Room Air Motor Wires Unit Size Hi Lo 009B (120/265) BLK RED 009B (208) BLK BLU 009B (230) ORG RED 012B (208/265) BLK BLU/RED 015B BLK BLU

Sequence of OperationHeating With “HEAT” button depressed, compressor and outdoor air

fan cycles (outdoor ambient above 40°F) to maintain thermostat requirements, (outdoor ambient below 40°F) electric element cycles to maintain thermostat requirements.

Cooling With “COOL” button depressed, reversing valve energized, compressor and outdoor air fan cycle to satisfy thermostat requirements.


Low Ambient TC3 prevents operation of compressor when outdoorLockout ambient drops below 40°F.Thermostat

Wiring DiagramPNHS4 (ENH) Type 45 Replacement (Heat Pump with Supplemental Electric Heat) Manual Changeover Control



C1/3 CapacitorCB Circuit Breaker (Option) (120/265V-1 Pole) (208/230V-2 Pole)HL Hi LimitHTR Electric HeaterM1 Motor-Room AirM2 CompressorM3 Motor-Outdoor Air FanM4 Motor-Vent (Option)OL Compressor OverloadP1 Plug-ChassisP2 Plug-Low Voltage

Wire NutHP High Pressure CutoutP5 Plug-HP CutoutR2 Relay-CoolingR3 Relay-HeatingR4 Relay-FanR5 Relay-SetbackR6 Relay-InterlockR7 Relay-HP CutoutRV Valve-ReversingS1 Switch-Push ButtonS2 Switch-DamperT Transformer-Class 2TB1 Terminal BlockTB3 Terminal BlockTC1 Thermostat-Room AirTC2 Thermostat-SetbackTD2 Relay-Time DelayTC3 Thermostat-Low Ambient LockoutTC4 Thermostat-Low LimitTC5 Thermostat-FreezeTD1 Relay-Remote Setback (Option)DOB Relay-DOB

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Wire NutR2 Relay-CoolingR3 Relay-HeatingR4 Relay-FanR5 Relay-SetbackR6 Relay-InterlockR7 Relay-HP CutoutR8 Relay-HFLORV Valve-ReversingS1 Switch-Push ButtonS2 Switch-DamperT Transformer-Class 2TB1 Terminal BlockTB3 Terminal BlockTC1 Thermostat-Room AirTC2 Thermostat-SetbackTC3 Thermostat-Low Ambient LockoutTC4 Thermostat-Low LimitTC5 Thermostat-FreezeTD1 Relay-Remote Setback (Option)TD2 Relay-Time DelayV1 Valve-Motorized (Normally Closed)



C1/3 CapacitorCB Circuit Breaker (Option) (120/265V-1 Pole) (208/230V-2 Pole)HL Hi LimitHTR Electric HeaterM1 Motor-Room AirM2 CompressorHP High Pressure CutoutP5 Plug-HP CutoutM3 Motor-Outdoor Air FanM4 Motor-Vent (Option)OL Compressor OverloadP1 Plug-ChassisP2 Plug-Low VoltageP3 Plug-Valve MotorP4 Plug HFLOHFLO Heat Fan Lockout

Room Air Motor Wires Unit Size Hi Lo 009B (120/265) BLK RED 009B (208) BLK BLU 009B (230) ORG RED 012B (208) BLK BLU/RED 015B (208) BLK BLU

Outdoor Air Motor Wires Unit Size Color 009B (208) RED 012B (208) RED 015B (208) RED

Wiring DiagramPNES4 EnerSaver “B” Design Type 45 Replacement (Hydronic Heat with Heat Fan Lockout) Manual Changeover Control

Sequence of OperationHeating With “HEAT” button depressed, motorized valve

cycles to satisfy thermostat requirements.

Cooling With “COOL” button depressed, compressor and condenser fan cycle to satisfy thermostat

requirements.


Motorized Vent With vent switch in “AUTO” position, vent damper opens when “COOL” or “HEAT” button is depressed with vent switch in “CLOSED” position, vent damper remains closed. Vent switch is concealed behind front panel.

Low Ambient TC3 prevents operation of cooling when outdoorLockout ambient drops below 40°F.Thermostat(Optional)

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Warranty

All McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Lim-ited Product Warranty. Consult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To find your local McQuay Representative, go to www.mcquay.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.mcquay.com.

Products Manufactured in an ISO Certified Facility.

© 2010 McQuay International • www.mcquay.com • (800) 432-1342 IM 1080

pnes4 and pnhs4 (enersaver “b” design – type 45)

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