Whirlpool ATR1243SPP, ATE0943SPP, ATR0943SPP, ATE1243SPP, ATR1545SPP Technical Manual

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Page 1

CONSUMER SERVICES TECHNICAL

EDUCATION GROUP PRESENTS

PACKAGED

TERMINAL

AIR

CONDITIONERS

R-99

Models: ATE0743SPP, ATE0943SPP, ATE1243SPP, ATE1545SPP,  ATR0743SPP, ATR0943SPP, ATR1243SPP, ATR1545SPP   ATE0953SPP, ATE1253SPP,ATE1555SPP,   ATR0953SPP, ATR1253SPP,ATR1555SPP,  ATE0743RPP, ATE0943RPP, ATE1243RPP, ATE1545RPP,  ATR0743RPP, ATR0943RPP, ATR1243RPP, ATR1545RPP

JOB AID

Part No. 8178315

Page 2

FORWARD

This Whirlpool Job Aid, “Packaged Terminal Air Conditioners” (Part No. 8178315), provides the technician with information on the installation, operation, and service of the Packaged Terminal Air Conditioners . It is to be used as a training Job Aid and Service Manual. For specific information on the model being serviced, refer to the “Use and Care Guide,” or “Tech Sheet” provided with the air conditioner.

The Wiring Diagrams and Strip Circuits used in this Job Aid are typical and should be used for training purposes only. Always use the Wiring Diagram supplied with the product when servicing the unit.

GOALS AND OBJECTIVES

The goal of this Job Aid is to provide detailed information that will enable the service technician to properly diagnose malfunctions and repair the Packaged Terminal Air Conditioners.

The objectives of this Job Aid are to:

• Understand and follow proper safety precautions.

• Successfully troubleshoot and diagnose malfunctions.

• Successfully perform necessary repairs.

• Successfully return the air conditioner to its proper operational status.

WHIRLPOOL CORPORATION assumes no responsibility for any repairs made on our products by anyone other than Authorized Service Technicians.

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Page 3

TABLE OF CONTENTS

Page

GENERAL............................................................................................................................... 1-1

Whirlpool Model & Serial Number Designations ................................................................ 1-1

Model & Serial Number Label & Wiring Diagram Locations .............................................. 1-2

Specifications..................................................................................................................... 1-3

Whirlpool Packaged Terminal Air Conditioner (PTAC) And

Packaged Terminal Heat Pump (PTHP) Warranty ......................................................... 1-4

INSTALLATION INFORMATION ........................................................................................... 2-1

Electrical Requirements ..................................................................................................... 2-1

Drain Kit Installation ........................................................................................................... 2-2

Chassis Installation ............................................................................................................ 2-5

Remote Wall Thermostat Installation ................................................................................. 2-9

PRODUCT OPERATION ........................................................................................................ 3-1

Theory Of Operation .......................................................................................................... 3-1

Refrigeration Operation .................................................................................................. 3-1

Heat Pump Operation .................................................................................................... 3-3

Reversing Valve Operation ............................................................................................ 3-4

Remote Thermostat Operation....................................................................................... 3-5

Heat Pump Function ...................................................................................................... 3-7

Operating The Controls ..................................................................................................... 3-8

COMPONENT ACCESS ......................................................................................................... 4-1

Component Locations ........................................................................................................ 4-1

Removing The Indoor Thermostat, Mode (System) Switch, And Heat Anticipator ............ 4-2

Removing The Power Supply Cord ................................................................................... 4-4

Removing The Defrost Thermostat.................................................................................... 4-5

Removing The Hot Start Relay And Hot Start Sensor ....................................................... 4-6

Removing The Capacitor & Fan Cycle Switch ................................................................... 4-7

Removing The Remote Control Unit Fan Switch ............................................................... 4-8

Removing The Heater & Limit Switch ................................................................................ 4-9

Removing The Fan Motor ................................................................................................ 4-10

Removing The Condensate Valve Bellows...................................................................... 4-13

Removing The Overload Protector And The Compressor ............................................... 4-14

Removing The Evaporator ............................................................................................... 4-16

Removing The Condenser ............................................................................................... 4-18

Removing The Solenoid Coil & Reversing Valve............................................................. 4-20

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Page 4

COMPONENT TESTING ........................................................................................................ 5-1

Indoor Thermostat ............................................................................................................. 5-1

Mode (System) Switch ....................................................................................................... 5-2

Heat Anticipator ................................................................................................................. 5-2

Defrost Thermostat (Emergency Heat Switch) .................................................................. 5-3

Hot Start Relay .................................................................................................................. 5-4

Hot Start Sensor ................................................................................................................ 5-4

Capacitor ........................................................................................................................... 5-5

Fan Cycle Switch & Remote Control Unit Fan Switch ....................................................... 5-5

Heater & Limit Switch ........................................................................................................ 5-6

Fan Motor ......................................................................................................................... 5-6

Overload Protector............................................................................................................. 5-7

Compressor ....................................................................................................................... 5-7

Solenoid Coil...................................................................................................................... 5-8

DIAGNOSIS & TROUBLESHOOTING ................................................................................... 6-1

Diagnosing The Sealed System ........................................................................................ 6-1

Troubleshooting Charts ..................................................................................................... 6-7

WIRING DIAGRAMS & STRIP CIRCUITS ............................................................................. 7-1

Wiring Diagrams ................................................................................................................ 7-5

Strip Circuits .................................................................................................................... 7-10

TECH TIPS ............................................................................................................................. 8-1

Routine Maintenance ......................................................................................................... 8-1

Accessories ....................................................................................................................... 8-2

Optional Desk Control Unit ................................................................................................ 8-4

General Troubleshooting ................................................................................................... 8-5

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GENERAL

WHIRLPOOL MODEL & SERIAL NUMBER DESIGNATIONS

MODEL NUMBER

MODEL NUMBER A T R 12 4 3 S P P 0

PRODUCT GROUP

A = AIR CONDITIONER

PRODUCT IDENTIFICATION

T = PTAC, WHIRLPOOL

MODEL TYPE

R = HEAT PUMP W/AUXILIARY HEAT E = COOLING W/ELECTRIC HEAT

NOMINAL COOLING CAPACITY

07 = 7,000 BTU/HR 09 = 9,000 BTU/HR 12 = 12,000 BTU/HR 15 = 15,000 BTU/HR

ELECTRICAL CODE

4 = 208V-230V, 1 PHASE, 60 HZ 5 = 265V, 1 PHASE, 60 HZ

HEATER

2 = 2.5 KW 3 = 3.4 KW 5 = 5.0 KW

FEATURE CODE OPTIONS

S = STANDARD ELECTROMECHANICAL R = REMOTE WALL-MOUNTED THERMOSTAT C = SEACOAST PROTECTION / STD. CONTROLS B = REMOTE THERMOSTAT / SEACOAST PROTECTION

MANUFACTURING LOCATION

P = PURCHASED PRODUCT

YEAR OF INTRODUCTION

M = 2003, P = 2004, R = 2005, S = 2006, T = 2007

ENGINEERING CHANGE

0, 1, 2, ETC.

SERIAL NUMBER

SERIAL NUMBER QR P 05 21234

MANUFACTURING RESPONSIBILITY

QR = FRIEDRICH MANUFACTURING CO.

YEAR OF PRODUCTION

P = 2003, R = 2004

WEEK OF PRODUCTION

5TH WEEK

PRODUCT SEQUENCE NUMBER

1-1

Page 6

MODEL & SERIAL NUMBER LABEL &

WIRING DIAGRAM LOCATIONS

The Model/Serial Number label and Wiring Diagram locations are shown below.

Wiring Diagram Location

(Front Cover Removed)

Model & Serial Number Location

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SPECIFICATIONS

ATE-SERIES PTAC W/ELECTRIC HEAT — COOLING PERFORMANCE

Whirlpool Model

ATE0743SPP Standard 7500/7000 11600 230 3.4 12.2 20 6-20 20 Amp 2.1 250 NA ATE0943SPP Standard 9200/9000 11600 230 3.4 11.3 20 6-20 20 Amp 2.7 300 NA ATE1243SPP Standard 12000/12000 11600 230 3.4 10.7 20 6-20 20 Amp 3.8 325 NA ATE1545SPP Standard 15000-15000 17000 230 5.0 9.5 30 6-30 30 Amp 5.5 350 NA ATE0953SPP Standard 9200/9000 11600 265 3.4 11.3 20 6-20 20 Amp 2.7 300 NA ATE1253SPP Standard 12000/12000 11600 265 3.4 10.7 20 6-20 20 Amp 3.8 325 NA ATE1555SPP Remote 15000/15000 17000 265 5.0 9.5 30 6-20 30 Amp 3.5 350 NA ATE0743RPP Remote 7500/75000 11600 230 3.4 12.2 20 6-20 20 Amp 2.1 250 NA ATE0943RPP Remote 9200/9000 11600 230 3.4 11.3 20 6-20 20 Amp 2.7 300 NA ATE1243RPP Remote 12000/12000 11600 230 3.4 10.7 20 6-20 20 Amp 3.8 325 NA ATE1545RPP Remote 15000-15000 17000 230 5.0 9.5 30 6-30 30 Amp 5.5 350 NA

Control

Type

Cooling BTU

230/208v

Heating

BTU

Electric

Volts

Heater

EER

Breaker

Amps-

NEMA

Plug

Type*

Plug

Dehum-

Pts/Hr

CFM COP

ATR-SERIES PTHP W/HEATING — COOLING PERFORMANCE

Whirlpool Model

ATR0743SPP Standard 7200/7000 11600 230 3.4 12.1 20 6-20 20 Amp 2.1 250 3.3 ATR0943SPP Standard 9100/9000 11600 230 3.4 10.5 20 6-20 20 Amp 2.1 250 3.3 ATR1243SPP Standard 12000/12000 11600 230 3.4 10.5 20 6-20 20 Amp 2.1 250 3.3 ATR1545SPP Standard 15000/14700 17000 230 5.0 9.3 30 6-30 30 Amp 5.5 350 2.8 ATR0953SPP Standard 9100/9000 11600 265 3.4 11.3 20 6-20 20 Amp 3.8 325 3.1 ATR1253SPP Standard 12000/12000 11600 265 3.4 10.5 20 6-20 20 Amp 3.8 325 3.1 ATR1555SPP Standard 15000/14700 17000 265 5.0 9.3 30 6-30 30 Amp 5.5 350 2.8 ATR0743RPP Remote 7200/7200 11600 230 3.4 12.1 20 6-20 20 Amp 2.1 250 3.3 ATR0943RPP Remote 9100/9000 11600 230 3.4 11.3 20 6-20 20 Amp 2.1 250 3.3 ATR1243RPP Remote 12000/12000 11600 230 3.4 10.5 20 6-20 20 Amp 3.8 325 3.1 ATR1545RPP Remote 15000/14700 17000 230 5.0 9.3 30 6-30 30 Amp 5.5 350 2.8

Control

Type

Cooling BTU

230/208v

Heating

BTU

Electric

Volts

Heater

EER

Breaker

Amps-

NEMA

Plug

Type*

Plug

Dehum-

Pts/Hr

CFM COP

* 15 Amps available on special order models

CFM = Cubic Feet per Minute COP = Coefficient Of Performance (applies to PTHP only)

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WHIRLPOOL PACKAGED TERMINAL AIR CONDITIONER (PTAC) AND PACKAGED TERMINAL HEAT PUMP (PTHP) WARRANTY

LENGTH OF WARRANTY:

ONE YEAR FULL WARRANTY

FIVE YEAR FULL WARRANTY

SECOND THROUGH FIFTH YEAR LIMITED WARRANTY

WHIRLPOOL WILL PAY FOR:

For one year from the date of installation, if this PTAC/PTHP fails when operated and maintained according to instructions attached to or furnished with the product, Whirlpool Corporation will pay for replacement parts and repair labor to correct defects in materials or workmanship. Service must be provided by a Whirlpool designated service company.

For five years from the date of purchase, if this PTAC/PTHP fails when operated and maintained according to instructions attached to or furnished with the product, Whirlpool Corporation will pay for replacement parts and repair labor to correct defects in materials or workmanship in the sealed refrigeration system, including the compressor, evaporator, condenser, reversing valve and connecting tubing. Service must be provided by a Whirlpool designated service company.

For the second through fifth year from the date of purchase, if this PTAC/PTHP fails when operated and maintained according to instructions attached to or furnished with the product, Whirlpool Corporation will pay for replacement parts to correct defects in materials or workmanship in the electrical or air flow systems including the fan motor, capacitor, fan, blower wheel, switches, thermostat, relays, frost controls, heat control, heater, heater protectors, compressor overload, solenoids, auxiliary controls, and transformer. This is a limited parts-only warranty and does not include labor or transportation to and from the service shop. Service must be provided by a Whirlpool designated service company.

WHIRLPOOL WILL NOT PAY FOR:

1. Service calls to correct the installation of the PTAC/PTHP, instruct you how to use the PTAC/PTHP, to replace fuses, correct wiring, reset circuit breakers, or to clean or replace owner accessible air filters.

2. Damage resulting from accident, alteration, misuse, abuse, fire, floods, acts of God, improper installation not in accordance with local electrical and plumbing codes, or use of products not approved by Whirlpool Corporation, or Whirlpool Canada, Inc.

3. Replacement parts or repair labor costs for units operated outside the United States or Canada.

4. Pickup and delivery, or any transportation and reinstallation charges that may be required.

5. The removal and reinstallation of the PTAC/PTHP.

6. Repairs to parts or systems resulting from unauthorized modifications made to the PTAC/PTHP.

WHIRLPOOL CORPORATION AND WHIRLPOOL CANADA, INC. SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.

Some states and provinces do not allow the exclusion or limitation of incidental or consequential damages, so this exclusion or limitation may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from state to state or province to province.

Outside the United States and Canada, a different warranty may apply. For details, please contact your Whirlpool authorized dealer.

If you need service, first see "Troubleshooting" section of the Installation/Operation Manual. After checking “Troubleshooting,” additional help can be found by checking the “Assistance or Service” section, or by calling the Whirlpool Corporation Customer Interaction Center at 1-800-253-1301 (toll-free), from anywhere in the United States. In Canada, please call 1-800-807-6777.

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INSTALLATION INFORMATION

ELECTRICAL REQUIREMENTS

Electrical Shock Hazard

Plug into a grounded 3 prong outlet.

Do not remove ground prong.

Do not use an adapter.

Do not use an extension cord.

Failure to follow these instructions can result in death, fire, or electrical shock.

IMPORTANT: Connect PTAC/PTHP to a

single-outlet circuit only.

230/208 VOLT PTAC/PTHP

All 230/208 volt PTAC/PTHPs are equipped with power cords.

230/208 volt 250 volt Receptacles and PTAC/PTHP Overcurrent Protection

AMPS 15 20 30

RECEPTACLE

Electrical Shock Hazard

Electrically ground PTAC/PTHP.

Connect ground wire to green pigtail lead.

Use copper wire for supply connection.

Correct wire gauge is shown in the chart below.

Failure to follow these instructions can result in death or electrical shock.

Rating Plate Ampacity AWG

Less than 15 14

16 - 20 12

21 - 30 10

265 VOLT PTAC/PTHP

All 265 volt PTAC/PTHPs are equipped with pigtail leads for field wiring.

IMPORTANT:

NEMA Type 6-15R 6-20R 6-30R

The field-supplied outlet must match plug on service cord and be within reach of service cord.

• Use copper conductors only.

• Wire sizes are per NEC.

• Use on individual branch circuit only.

• Use overcurrent protection indicated on PTAC/PTHP’s rating plate.

• PTAC/PTHP must be grounded to branch circuit.

• Check local codes.

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DRAIN KIT INSTALLATION

LOCATION REQUIREMENTS

• Unpack and dispose of packaging materials.

• The drain kit accessory contains 10 complete drain kits.

• Locate the drain kit in the primary area for best drainage. Maintain at least 1/2″ (1.27 cm) distance from the embossed area. If the primary area cannot be used, locate the drain kit in the secondary area and cut away the foam insulation to allow access to the drain. Do not locate the drain kit within 3″ (7.6 cm) of the indoor side of the sleeve.

1 2

1. Secondary area

2. Primary area - no foam insulation

3. If the drain must be located in the secondary area, the foam insulation must be cut away and removed to allow access to the drain.

4. Embossed area

3" (7.6 cm)

NOTES:

Determine whether the drain will be located on the exterior of the wall, internally in the wall cavity or internally in the room.

Internal Drain

• Drain kit located inside the room will allow condensate to drain to a field drain located inside the room.

• Drain kit located inside the wall cavity will allow condensate to drain to a field drain located inside the wall cavity.

External Drain

• Drain kit located outside will allow condensate to drain to a field drain located outside or to drain away from the wall sleeve.

• When using an external drain system, select the drain hole on the back of the wall sleeve which best meets your drainage situation.

• The cover plate and external drain tube assembly may be placed on either side of the wall sleeve.

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INTERNAL DRAIN INSTALLATION (Located Inside The Wall Cavity Or In The Interior Of The Room)

NOTE: If installing an internal drain, install drain

kit on the wall sleeve before the wall sleeve is installed.

1. Using the mounting plate from the drain kit

as a template, mark and drill two 3/16″ mounting holes and a 1/2″ drain hole at the location chosen above.

2. Remove the backing from the gasket and mount it on the flat side of the mounting plate. Insert the drain tube through the hole in the gasket and mounting plate so the tube flange will be against the wall sleeve.

3 4

5 6

3. Position the assembly beneath the drilled

holes and secure it with #10 - 24 x 1/2″ machine screws and locknuts (provided). Seal the tops of the screws with silicone sealant.

4. Connect the drain tube to the drain system in the building.

IMPORTANT: Follow all local building codes when making this connection.

5. Attach the 2 cover plates and gaskets over the drain holes at the rear of the wall sleeve with #10 sheet metal screws (provided).

NOTE: Check that the 4 overflow slots at the rear of the wall sleeve are not blocked.

1. Screw

2. Wall sleeve

3. Gasket

4. Mounting p late

5. Nut

6. Drain tube

7. Optional 4 in. (10.2 cm) straight drain tube

1. Drain holes

2. Overflow slots

3. Gasket

4. Cover plate

5. #10 sheet metal screws

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EXTERNAL DRAIN INSTALLATION (Located On The Exterior Of The Wall)

1. Peel the backing tape from the gaskets and mount them on the curved side of one cover plate and one mounting plate.

2. Place the drain tube through the gasket and the mounting plate with the flange toward the wall sleeve.

3. Using 2 - #10 x 1/2″ sheet metal screws (provided), attach the drain tube assembly to one of the 2 drain holes at the rear of the wall sleeve.

Position the large flange at the bottom of the sleeve facing toward the sleeve, and partially tighten the screws. Rotate the drain tube to a horizontal position to allow for the wall sleeve to be installed into the wall. Once the wall sleeve is installed, position the drain tube to the desired angle. Before tightening the screws, check to be sure the tube’s position will allow the wall sleeve to fit through the wall. Tighten screws.

1 2

1. Drain holes

2. Overflow slots

3. Foam gasket

4. Mounting plate

5. #10 x 1/2 in. sheet metal screws

6. 1/2 in. O.D. tube

Optional 4 in. (10.2 cm) straight drain tube Cover plate (no center hole)

7 6

4. Using 2 - #10 x 1/2″ sheet metal screws

(provided), attach the cover plate to the remaining drain hole. Check that the large flange on the plate is positioned at the bottom of the sleeve.

NOTE: Check that the 4 overflow slots at the rear of the wall

5. Discard any unused kit parts.

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CHASSIS INSTALLATION

Excessive Weight Hazard

Use two or more people to move and install PTAC/PTHP.

Failure to do so can result in back or other injury.

1. Remove banding and carton.

2. Remove the 2 chassis shipping brackets from the ends of the shipping pallet.

NOTES:

• Check to be sure wall sleeve, wall sleeve extension (if used), wall sleeve adapter (if used), rear grille, and drain kit are properly installed before chassis installation.

• Locate PTAC/PTHP near the location it will be installed.

IMPORTANT: Copper refrigerant tubes are not handles. Product damage will occur if tubes are used to lift or move the chassis.

1. Compressor

2. Chassis shipping bracket

3. Shipping pallet

3. Remove the front cover, which is contained in a protective plastic bag, from chassis.

4. Dispose of all shipping and packaging material.

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Page 14

INSTALL THE CHASSIS

3. Locate the 4 - #10 x 1″ chassis mounting

screws (provided). Tighten the screws into the wall sleeve screw clips.

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Disconnect power.

2. Center the chassis in the installed sleeve and carefully push the chassis until the chassis flange and gasket contact the sleeve flange.

1. Chassis mounting screw

2. Screw clips

3. Chassis flange

4. Install the front cover by placing the top of the front cover onto the metal flange at the top of the chassis. Rotate the front cover into place. Insert the thumbscrews (provided) into the slots located at the bottom back corners of the front cover. Tighten to secure the cover.

NOTE: If the unit has been placed in such a way that there is no room to insert the thumbscrews from the bottom, a side mounting kit may be used.

MAKE ELECTRICAL CONNECTIONS

1. Wall sleeve

2. Chassis flange and gasket

IMPORTANT: The installation of field wiring must conform to the requirements of the National Electrical Code, ANSI/NFPA NO. 70 (latest edition) in the United States, and any state laws and local ordinances (including plumbing or wastewater codes). In Canada, field wiring must conform to the Canadian electrical code PART I, CSA STANDARD C22.1-1993 or current edition. Local authorities having jurisdiction should be consulted before installation is made. Such applicable regulations or requirements take precedence over the general instructions in this Job Aid.

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Cord Connected Models

Electrical Shock Hazard

Plug into a grounded 3 prong outlet.

Do not remove ground prong.

FIELD WIRING CONNECTIONS

1. Disconnect power.

2. Remove the PTAC/PTHP front cover using the thumbscrews.

3. Route the incoming power supply through suitable conduit to the PTAC/PTHP control box.

4. Remove the 4 screws holding the control box.

Do not use an adapter.

Do not use an extension cord.

Failure to follow these instructions can result in death, fire, or electrical shock.

1. Plug into a grounded 3 prong outlet.

2. Reconnect power.

Direct Wired Models

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Remove these screws.

2. Do not remove these screws.

3. Bushing

2 3

5. Pivot the control box down, pull the chassis pigtail wires into the control box, and remove the bushing from the hole. The field-supplied wires will be routed through this hole.

Field wiring connections for direct-wired models can be done in one of 2 ways:

• Using field-supplied conduit and wires.

• Using the Conduit with Junction Box Kit accessory.

1. Bushing

2. Control box

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Page 16

6. Install field-supplied conduit into the same

)

hole as the original bushing for the chassis pigtail wires on the control box.

1. Field-supplied co nduit

2. Control box

7. Connect the chassis pigtail wires to the incoming power supply wires using the UL listed wire nuts (provided). Connect the black wire to the incoming L1 (black) wire. Connect the white wire to the incoming neutral (white) wire. Connect the green wire to the incoming ground (green or bare) wire.

12 3

1. Black wire

2. Incoming L1 wire (black wire)

3. Green wire

4. Ground wire (green or bare wire

5. White wire

6. Neutral wire (white wire)

8. Reattach the PTAC/PTHP control panel using the 4 screws removed earlier.

9. Reattach the PTAC/PTHP front cover using the thumbscrews removed earlier.

10. Reconnect power.

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Page 17

REMOTE WALL THERMOSTAT INSTALLATION

INSTALLATION REQUIREMENTS

• Unpack and dispose of packaging materials.

• This thermostat is a wall mounted, low-voltage thermostat that maintains room temperature by controlling the operation of the PTAC/PTHP. Batteries are not required— temperature and mode settings are preserved with the power off.

• This is not a 2-stage heat pump thermostat with emergency heat selection. The PTAC/ PTHP turns on the electric heat automatically based on the outdoor coil temperature, which is influenced by the outdoor temperature and humidity conditions.

• Chassis must be installed before installing remote thermostat.

IMPORTANT: Improper wiring or installation may cause the thermostat not to function. Wiring must conform to local and national electrical codes.

LOCATION REQUIREMENTS

For best performance, thermostat should be mounted:

• Approximately 5 ft (152.4 cm) from floor.

• Close to or in the room with the PTAC/PTHP, preferably on an inside partitioning wall.

• On a section of wall without pipes or duct work.

For best performance, do not mount thermostat:

• Close to a window, on an outside wall, or next to a door leading to the outside.

• Exposed to direct light and heat from a lamp, the sun, a fireplace, or other heat source. This may cause a false reading.

• Close to or in direct airflow from the PTAC/ PTHP.

• In areas with poor air circulation (behind a door or in an alcove).

Wall Thermostat Terminal Designation

Terminal Letter Operation Contact Made

Y Cooling During call for

cooling.

W Heating During call for heat-

ing.

G Fan Continuous if the

slider is in the “Fan” position; otherwise, on call for cooling or heating.

C (common) Common Constant

Terminal

R 24 V to the Constant (directly

thermostat from the transformer)

B (Heat Pump Reversing Made continuously units Only) Valve when the mode

switch is in heating.

INSTALL THE REMOTE WALL THERMOSTAT

Replacing Existing Thermostat

1. Disconnect power to avoid product dam-

age during removal of existing thermostat.

2. Disconnect wires from existing thermo-

stat, one at a time. Do not allow wires to fall back into the wall.

3. As each wire is disconnected, record wire

color and terminal marking.

4. Remove existing thermostat from wall.

5. See “Installing The New Thermostat.”

IMPORTANT: Mercury is a hazardous waste and must be disposed of properly. Contact the Thermostat Recycling Corporation at www.nema.org/trc for further information, or contact your local waste management authorities.

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Installing The New Thermostat

1.587

2.375

2.625

3.275

1. Disconnect power to avoid product damage during installation of new thermostat.

2. Remove the PTAC/PTHP front cover.

3. Locate the terminal strip on the front of the control box.

Remote Control UnitRemote Control Unit

5. Route the 24 volt thermostat wire alongside the conduit or service cord to the location chosen for the thermostat.

6. Separate the front housing and back plate of the thermostat.

OFF

CWY RG B

4. Connect the field supplied 5 or 6 conductor, NEC Class 2, 24 volt thermostat wire to the terminals in accordance with the wiring diagram.

1. Back plate

2. Front housing

7. Route thermostat wires through hole in back plate. Level back plate against wall (for aesthetic value only—thermostat need not be leveled for proper operation) and mark wall through any 2 of the 6 available mounting holes.

8. Drill two 3/18″ mounting holes in wall where marked.

Optional Mounting Method: Mounting holes on thermostat are designed to fit on a horizontally-mounted junction box.

1. Typical PTAC/PTHP unit

2. Used for PTHP only

3. Wall thermostat

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Page 19

9. Secure back plate to wall with 2 anchors and screws (provided) making sure all wires extend through hole in back plate.

10. Connect wires to proper terminals of the thermostat connector block.

14. Reconnect power.

NOTE: On power up, the LCD readout will display “oP” momentarily, and then the room temperature.

1 2

3 4

5 6

(20.3 mm)

0.8"

3.30"

(83.8 mm)

1. Typical PTAC/PTHP unit

2. Used for PTHP only

3. Wall thermostat

11. Push any excess wire back into wall. Excess wire inside the thermostat housing can interfere with proper airflow across the temperature sensor. Seal hole in wall to prevent air leaks. Air leaks can affect operation.

12. Install thermostat housing on back plate.

13. Reattach the PTAC/PTHP front cover.

4.55"

(115.6 mm)

1. Heat display

2. Cool display

3. Fan display

4. Set display

5. Mode button

6. Fan button

WHIRLPOOL DIGITAL THERMOSTAT OPERATION

Error Messages

E4 Internal memory failure.

Replace thermostat.

- - (two dashes) Cannot read room temperature. Replace thermostat.

Random Restart Feature

After a power outage, the Whirlpool digital thermostat will wait between 3 and 5 minutes before allowing the unit to restart. This is to keep multiple units from restarting at the same time when power is restored, thus preventing a circuit overload.

2-11

Page 20

— NOTES —

2-12

Page 21

PRODUCT OPERATION

THEORY OF OPERATION

Refrigeration Operation

The refrigeration system uses the following four basic principles in its operation:

1. Heat always flows from a warmer body to a cooler body.

2. Heat must be added to or removed from a substance before a change in state can occur.

3. Flow is always from a higher pressure area to a lower pressure area.

4. The temperature at which a liquid or gas changes state is dependent upon the pressure.

The refrigeration cycle begins at the compressor. Starting the compressor creates a low pressure in the suction line which draws refrigerant gas (vapor) into the compressor. The compressor then “compresses” this refrigerant, raising its pressure, and its temperature.

The refrigerant leaves the compressor through the discharge line as a hot, high pressure gas. The refrigerant enters the condenser coil where it gives up some of its heat. The condenser fan moves air across the finned surface of the condenser coil, and facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air.

When a sufficient quantity of heat has been removed from the refrigerant gas, the refrigerant will “condense” (change to a liquid). Once the refrigerant has been condensed to a liquid, it is further cooled by the air flowing across the condenser coil.

The Packaged Terminal Air Conditioner (PTAC) design determines at exactly what point (in the condenser) the change of state (gas to liquid) takes place. In all cases, however, the refrigerant must be totally evaporated (changed to a gas) before leaving the evaporator coil.

Suction Line

Evaporator Coil

Capillary Tube (Metering)

Refrigerant Strainer

Discharge Line

Condenser Coil

Compressor

Liquid Line

Filter/Drier

3-1

Page 22

The refrigerant leaves the condenser coil as a warm high pressure liquid. It then passes through the filter/drier (if so equipped). It is the function of the filter/drier to trap any moisture, contaminants, and large particulate matter present in the sealed system.

The liquid refrigerant next enters a metering device called a “capillary tube” whose purpose is to “meter” (control or measure) the quantity of refrigerant entering the evaporator coil.

Since the blower is moving indoor air across the finned surface of the evaporator coil, the expanding refrigerant absorbs some of the heat. This results in a lowering of the indoor air temperature, hence the “cooling” effect.

The expansion and absorption of heat causes the liquid refrigerant to evaporate, and change back to a gas. Once the refrigerant has been evaporated, it is further heated by the air that continues to flow across the evaporator coil.

In the capillary tube, this is accomplished through its size and length, and the pressure difference present across the device.

Since the evaporator coil is under a lower pressure than the liquid line, (due to the suction created by the compressor), the liquid refrigerant leaves the capillary tube, and enters the evaporator coil.

As the liquid enters the evaporator coil, the larger area and lower pressure allows the refrigerant to expand, and lower its temperature. This expansion is often referred to as “boiling.”

Suction Line

The particular system design determines at exactly what point the change of state, from a liquid to a gas, takes place in the evaporator. In all cases, however, the refrigerant must be totally evaporated (changed to a gas) before leaving the evaporator coil.

The low pressure (suction) created by the compressor causes the refrigerant to leave the evaporator through the suction line as a cool, low pressure vapor. The refrigerant then returns to the compressor, where the cycle is repeated.

Discharge Line

Evaporator Coil

Capillary Tube (Metering)

Refrigerant Strainer

Compressor

Condenser Coil

Liquid Line

Filter/Drier

3-2

Page 23

COOLING

Heat Pump Operation

All air conditioners are basically heat pumps. They move, or “pump,” heat from inside a room to the outdoors. A heat pump air conditioner adds a component called a “reversing valve.” It

REVERSING

INSIDE COIL

VALV E

DISCHARGE LINE

COMPRESSOR

allows heat to be transferred from the outdoors into the room. When the reversing valve is not energized, the system operates in the cooling mode.

SUCTION LINE

OUTSIDE COIL

ACCUMULATOR

HEATING

When the reversing valve is energized, the normal direction of refrigerant flow is diverted at the valve. The outdoor coil now becomes the low-pressure side of the system, and the inside

REVERSING

INSIDE COIL

VALV E

DISCHARGE LINE

COMPRESSOR

coil becomes the high-pressure side. The flow of all refrigerant past the reversing valve changes direction, and now brings heat into the room from the outdoors.

SUCTION LINE

OUTSIDE COIL

ACCUMULATOR

3-3

Page 24

Reversing Valve Operation

PILOT VALVE SOLENOID DE-ENERGIZED (COOLING)

The operation of the reversing valve is governed by the pilot solenoid coil. There are two small lines going to the pilot valve, and two lines going from the pilot valve to the main valve body. With the solenoid de-energized, the direction of flow is as shown, and the valve is in the cooling mode.

TO EVAPORATOR

PILOT VALVE

(SOLENOID DE-ENERGIZED)

SUCTION LINE

TO CONDENSER

PILOT VALVE SOLENOID ENERGIZED (HEATING)

When the solenoid is energized, refrigerant flow from the suction and discharge lines is redirected (reversed) through the pilot valve to opposite ends of the main valve body. This reverse in flow (pressure) causes the main slide in the valve body to shift to the opposite end, and reverses the flow of the entire system. This reversed direction of refrigerant flow is maintained as long as the pilot solenoid is energized.

TO EVAPORATOR

DISCHARGE LINE

PILOT VALVE

(SOLENOID ENERGIZED)

SUCTION LINE

TO CONDENSER

DISCHARGE LINE

3-4

Page 25

Remote Thermostat Operation

ROOM THERMOSTATS

Room thermostats are controlled by the use of a remote thermostat that will cycle the air conditioner to maintain the desired room temperature.

The fan speed switch controls the high and low fan speed operation. The switch is located on the control panel, and is independent of the thermostat.

Room thermostats range from the simple bimetallic type, to the more complex electronic setback type. No matter how simple or complex, they are simply a switch (or series of switches) designed to turn equipment on or off under the desired conditions.

An improperly operating, or poorly located room thermostat, can be the source of perceived equipment problems. A careful check of the thermostat and wiring must be made then to insure that it is not the source of problems.

THERMOSTAT LOCATION

Thermostats should not be mounted where they may be affected by drafts, discharge air from registers, (hot or cold), or heat radiated from the sun or appliances.

HEAT ANTICIPATORS

Heat anticipators are small resistance heaters that are built into most electromechanical thermostats (wired in series with the control “W” circuit). Their purpose is to prevent wide swings in room temperature during system operation in the “heating” mode. Since anticipators are wired in series, the “W” section of the circuit will open if one burns out, preventing the “heat” operation.

The heat anticipator provides a small amount of heat to the thermostat causing it to turn off the heat source just prior to reaching the setpoint of the thermostat. This prevents exceeding the set point.

To accomplish this, the heat output from the anticipator must be the same regardless of the current flowing through it. Consequently, some thermostats have an adjustment to compensate for varying current draw in the thermostat circuits.

Electronic thermostats do not use a resistance-type anticipator. These thermostats use a microprocessor that determines a cycle rate based on a program loaded into it at the factory.

The thermostat should be located about 5′ above the floor, in an area of average temperature, with good air circulation. Close proximity to the return air grille is the best choice.

Mercury bulb type thermostats must be level to control temperature accurately to the desired set-point.

3-5

Page 26

CALCULATING THE APPROXIMATE CFM

The approximate CFM actually being delivered can be calculated by using the following formula:

Kilowatts x 3413

Temperature Rise x 1.08

Do not use the kilowatt rating of the heater, as this will result in an incorrect airflow calculation.

Kilowatts can be calculated by multiplying the measured voltage to the unit, times the measured current draw of all the heaters that are in operation to obtain the wattage (watts). Kilowatts are then obtained by dividing the watts by

1000.

EXAMPLE: The measured voltage to the unit is 230 volts. The measured current draw of the heaters is 11.0 amps.

230 x 11.0 = 2530 2530 ÷ 1000 = 2.53 Kilowatts

2.53 x 3413 = 8635

Supply Air 95°F Return Air 75°F Temperature Rise 20°F

20 X 1.08 = 21.6

= CFM

8635

= 400 CFM

21.6

3-6

Page 27

Heat Pump Function

THE HOT START SENSOR

Under cold room conditions, (50°F, or below), the Hot Start Sensor turns on the heater strips with a call for heat to distribute warm air at the beginning of the “Heat” cycle. Once the return air has warmed sufficiently, (above 65°F), the heat pump mode will begin.

THE HEAT PUMP

The heat pump uses backup electric resistance heating coils. At extremely low outdoor ambient temperatures, the heat pump is automatically disabled, and the unit operates solely on electric resistance heat.

The heating control (defrost thermostat) is located behind the decorative front cover, and is found on the right side panel of the chassis. Its function is to allow the temperature range in which the heat pump operates to be manually adjusted.

Emergency Heat Operation Only: In the event of a compressor malfunction in the “heat pump” mode, turn the adjustment screw to the extreme counterclockwise “emergency heat” position. The heater will then cycle using electric resistance heat only. Note that in the emergency heat position, the compressor is locked out, disabling both the heat pump, and the cooling operations. IMPORTANT: Do not forget to return the control to its original position after repairs have been made. Otherwise, the compressor will remain locked out, and will not turn on during the “cooling” mode.

The heating control switches the unit’s heat operation between the heat pump, and electric resistance heat, based on the outdoor ambient temperature. These change-over temperatures are based on the settings of the control. The factory set-point is at the one o’clock position. If you wish to change the factory set-point, insert a flat-bladed screwdriver into the slot and turn counterclockwise to increase the changeover set-point, or clockwise to decrease it. NOTE: Use the factory set-point for optimum performance.

Adjustment

Screw

3-7

Page 28

OPERATING THE CONTROLS

TEMPERATURE CONTROL

The temperature control is a full range thermostat that maintains room temperature at the desired setting for both heating and cooling. Turn the knob counterclockwise for a warmer temperature, and clockwise for a cooler temperature.

NOTE: Always rotate the temperature control in small increments in the warmer or cooler direction. Moving the control more than 1/4″ at a time may overcompensate, and result in an extreme hot or cold condition.

MODE (SYSTEM) SWITCH

Low and High Cool

This setting operates the unit in the “cooling” mode. Cooling will not begin if the room temperature is below 60°F (15.5°C).

Low and High Heat

This setting operates the unit in the “heating” mode.

Fan Only

This setting operates the fan continuously at high fan speed to circulate air within the room. No heating or cooling functions are active in this mode.

TEMPERATURE LIMITING THERMOSTAT

The temperature limiting thermostat allows the temperature range of the thermostat to be varied.

To adjust the temperature range:

1. Turn the thermostat (temperature) control to the center position.

2. Pull the two control knobs off the control shafts and remove them.

3. Remove the four screws from the control panel and rotate the panel up.

4. Note the location of the two temperature limiting screws and remove the screws from their present location. NOTE: The screws are factory installed for a temperature range of between 60 and 90°F (15.5 to 32.2°C).

5. To adjust the temperature range, reinstall the two screws at the desired hole locations. NOTE: Each hole represents an approximate change of 4°. To set a maximum temperature range of approximately 64 to 86°F (17.7 to 30.0°C), install the two screws at the hole locations shown in the round illustration below.

6. Lower the control panel and install the two screws, then reinstall the two control knobs.

3-8

Page 29

FAN CYCLE SWITCH

REMOTE THERMOSTAT

The fan cycle switch is located behind the decorative front cover and below the control box. The switch is designed to operate the fan either continuously, or intermittently with the compressor or heating elements. When the switch is in the CONTINUOUS position, the fan will run continuously when the unit is turned on. With the switch in the CYCLE position, the fan will run only when the compressor or heating elements cycle on.

CONTINUOUS CYCLE

FRESH AIR VENT CONTROL

The fresh air vent control lever is located behind the front cover on the left side of the unit. The unit is shipped in the Closed position with a locking screw to prevent it from being moved. Remove the screw to operate the control. When the lever is back, the vent is open, and the outside air is mixed with indoor air. When the lever is forward, the vent is closed, and no outside air is admitted into the room. Only room air is recycled through the unit.

Remote thermostat units are controlled with a remote thermostat that is usually mounted on a wall. The thermostat will cycle the unit to maintain the desired room temperature (see page 3-5).

The fan speed switch controls the high and low fan speed operation. The switch is located on the control panel, and is independent of the thermostat.

Vent Closed

Lever Forward

Lever Back

Vent Open

3-9

Page 30

— NOTES —

3-10

Page 31

COMPONENT ACCESS

This section instructs you on how to service each component inside the Packaged Terminal Air Conditioner. The components and their locations are shown below.

COMPONENT LOCATIONS

Heater & Limit Switch

Fan Motor

Evaporator

Hot Start Relay

Condenser

Sensing Bulb &

Heat Anticipator

Reversing Valve & Solenoid Coil

(Heat Pump Models Only)

Compressor & Overload Protector

Indoor Thermostat

Mode

(System)

Switch

Capacitor

Hot Start Sensor

Fan Cycle Switch

Not Shown: Condensate Valve Bellows

Remote Control Unit

Fan Switch

Defrost Thermostat

Control Chassis Components

4-1

Page 32

REMOVING THE INDOOR THERMOSTAT,

MODE (SYSTEM) SWITCH, AND HEAT ANTICIPATOR

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

2. Remove the front cover from the unit (see page 2-11 for the procedure).

6. Remove the four hex-head screws from the control chassis.

Indoor Thermostat

Screws

3. Remove the four hex-head screws from the control panel and lift the panel off the unit.

Screw

Control Panel

Screw

Refer to the photos at the top of the right column.

4. Pull the control knobs off the control shafts.

5. If you are replacing the indoor thermostat, remove the two hex-head mounting screws, as shown in the round inset.

Control Chassis

4 Control Chassis Screws

7. Rotate the top of the chassis down so that you can access the components.

Locking

Tab

Mode Indoor Thermostat

Control Chassis

Switch

4-2

Page 33

8. To remove the mode switch:

10. To remove the heat anticipator:

a) Raise the locking tab with a screwdriver

blade, rotate the switch body to the right approximately 1/4-turn, and remove it from the chassis (see the round inset photo in step 7).

b) Disconnect the wires from the switch

terminals. NOTE: Disconnect the wires one at a time from the old switch, and install each of them to the identical terminals on the new one. This will help prevent miswiring. The switch wiring is shown below, and is also shown on the Wiring Diagram supplied with the unit.

OR (Heat Ant)

Ribbed (Power Cd)

BK (Fan Cycle Sw)

BK (Thermostat)

RD (Rev. Valve)

RD (Hot Start Sensor)

(Jumper)RD(Cap)

COM

Smooth (Power)

(Fan Mtr)RD(Fan Mtr)

BU (Hot Start Relay)

(Fan Cycle Sw) BU

YL (Fan Cycle Sw)

BU (Thermostat)

RD (Thermostat)

a) Disconnect the orange wires from the

indoor thermostat and mode switch terminals.

b) Push the strain relief out of the control

chassis hole and remove it from the two orange wires.

c) Pull the sensing bulb & heat anticipator

assembly off the front of the evaporator.

d) Pull the sensing tube out of the holder

and remove the heat anticipator.

Sensing Bulb

Heat Anticipator

BU (Temp Ctrl)

WH (Hot Start Relay)

Locking Tab

9. To remove the indoor thermostat:

a) Disconnect the wires from the indoor

thermostat terminals. NOTE: The wiring for the thermostat is shown to the right, and also on the Wiring Diagram supplied with the unit.

b) Pull the sensing bulb & heat anticipator

assembly off the front of the evaporator (see the photos to the right).

c) Pull the sensing tube out of the holder

and through the grommet in the control chassis, and remove the indoor thermostat.

Sensing Bulb & Heat Anticipator Holder

BU (Mode Sw-Pin 3)

OR (Heat Anticipator)

Strain ReliefGrommet

BK (Rev. Valve)

BK (Mode Sw-Pin 2)

RD (Mode Sw-Pin 1)

4-3

Page 34

REMOVING THE POWER SUPPLY CORD

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Ground Screw

Strain Relief

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

2. Remove the front cover from the unit (see page 2-11 for the procedure).

3. Lower the control chassis to access the components (see page 4-2 for the procedure).

4. Disconnect the ribbed power supply cord lead from mode switch terminal L2, and the smooth lead from terminal L1 of the mode switch.

5. Remove the machine screw from one end of the green ground wire at the control chassis, and the screw at the other end of the green wire at the chassis location near the capacitor.

6. Push the power cord strain relief out of the control chassis mounting hole, and remove the power supply cord.

Power Cord Leads (L1 & L2)

Ground Screw

Electrical Shock Hazard

Connect green ground wire to ground screws.

Failure to do so can result in death or electrical shock.

NOTE: Be sure to reinstall the power supply

cord leads to the mode switch terminals L1 (smooth) and L2 (ribbed), and the ends of the green ground wire to the chassis locations with their machine screws. Also, be sure to reinstall the strain relief on the power supply cord.

4-4

Page 35

REMOVING THE DEFROST THERMOSTAT

4. Disconnect the wires from the defrost thermostat terminals.

5. Remove the two hex-head screws from the defrost thermostat.

6. Remove the outdoor grille from the rear of the unit.

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

2. Remove the front cover from the unit (see page 2-11 for the procedure).

3. Lower the control chassis to access the components (see page 4-2 for the procedure).

7. Pull the sensing tube out of the condenser and push the tube into the front of the unit as far as possible.

Rear Of Unit

Sensing Tube

8. Pull the sensing tube inside and remove the defrost thermostat.

Red Wire

Black Wire

2 Brown Wires

Defrost

Thermostat

Screws

Defrost Sensing Tube

Defrost Thermostat

4-5

Page 36

REMOVING THE HOT START RELAY

AND HOT START SENSOR

4. To remove the hot start relay:

a) Disconnect the wires from the relay

terminals.

b) Remove the two hex-head screws from

the relay and remove it.

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

2. Remove the front cover from the unit (see page 2-11 for the procedure).

3. Lower the control chassis to access the components (see page 4-2 for the procedure).

Hot Start Relay

BR-Defrost Thermostat

BR-Hot Start Sensor

5. To remove the hot start sensor:

a) Disconnect the wires from the sensor

terminals.

2 RD

Hot Start Sensor

b) Remove the two hex-head screws from

the sensor and remove it.

Screw

Hot Start Sensor

Screw

4-6

Page 37

REMOVING THE CAPACITOR & FAN CYCLE SWITCH

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

2. Remove the front cover from the unit (see page 2-11 for the procedure).

3. Lower the control chassis to access the components (see page 4-2 for the procedure).

(White Ring)

Clamp Screw

BR (Green Ring)

2 RD & YL (Black Ring)

Clamp Screw

5. To remove the fan cycle switch:

a) Disconnect the wires from the switch

terminals.

b) Press in on the locking arms and push

the switch out of the control chassis cutout.

REASSEMBLY NOTE: Make sure that you position the fan cycle switch with the pin 1 terminal to the left as shown before you reinstall it in the chassis cutout.

Capacitor

Fan Cycle Switch

4. To remove the capacitor:

a) Disconnect the wires from the termi-

nals (see the illustrration at the top of the right column).

b) Loosen the two hex-head screws from

the capacitor clamp and remove the capacitor from the clamp.

4-7

Pin 1

VT & BK

Locking Arms

Page 38

REMOVING THE REMOTE CONTROL UNIT FAN SWITCH

4. Lift the remote control panel off the unit, and turn it over.

5. Disconnect the wires from the fan switch terminals.

6. Press in on the locking arms and push the switch out of the control panel cutout.

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

2. Remove the front cover from the unit (see page 2-11 for the procedure).

3. Remove the four hex-head screws from the remote control panel.

Screw Screw

Remote

Control Panel

Pin 1

BK BU RD

REASSEMBLY NOTE: Make sure that you position the fan switch with the pin 1 terminal positioned as shown before you reinstall it in the control panel cutout.

Screw

4-8

Page 39

REMOVING THE HEATER & LIMIT SWITCH

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

5. Remove the four hex-head screws from the deck, then lift the left end of the deck, pull the right end tabs out of their slots, and remove the deck.

4 Screws

Deck

6. Lift the heater out of the unit and disconnect the two wires from the terminals.

7. To remove the limit switch from the heater, remove the three screws.

2. Remove the front cover from the unit (see page 2-11 for the procedure).

3. Remove the three hex-head screws from the screen and remove the screen.

3 Screws

Screen

4. Remove the two hex-head screws from the air deflector and remove the deflector.

Screw Screw

Air Deflector

Heater

Screw

Limit Switch

Screw

Wires

4-9

Page 40

REMOVING THE FAN MOTOR

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

6. Disconnect the brown and yellow fan motor wires from the capacitor terminals.

BR Fan Mtr (Green Ring)

YL Fan Mtr (Black Ring)

2. Remove the unit from the wall sleeve (see pages 2-10 and 2-11 for the procedure).

3. Remove the heater and limit switch from the unit (see page 4-9 for the procedure).

4. Lower the control chassis so you can access the fan motor wires (perform steps 3, 6, and 7 on page 4-2).

5. Disconnect the black and red fan motor wires from mode switch terminals H and L.

7. Pull the ends of the four fan motor wires through the chassis hole and remove them from the plastic wire clamp.

Wire Clamp

Chassis Hole

(Fan Mtr)

Mode Switch

4-10

COM

Page 41

8. Using a 5/32″ allen wrench, loosen the

collar and clamp screws on the condenser and evaporator fans.

10. Remove the two hex-head screws from each of the condenser fan shroud mounting brackets and remove the brackets.

Collar Screw

Condenser Fan

11. Remove the remaining three hex-head screws from the condenser shroud (1 bottom and 2 side screws).

Condenser

Fan Shroud

Side Screw (1 of 2)

Brackets &

Screws (2 each)

Evaporator Fan

Clamp Screw

9. Remove the four hex-head screws from the bottom of the fan motor brackets (2 on each bracket).

Bottom Screw

12. From the rear of the unit, pull the defrost sensing tube out of the condenser and from behind the bracket, and move it out of the way.

13. Remove the two hex-head condenser mounting screws from the chassis pan.

Sensor Tube

Bracket

Condenser

Screw

Fan Motor Bracket Screw (1 of 4)

Continued on the next page.

4-11

Page 42

14. Grasp the bottom of the condenser under the two end brackets, and carefully lift the assembly until the bottom of each bracket is positioned over the top edge of the chassis pan. Carefully pull the condenser back just far enough to clear the fan motor assembly when it is removed.

18. Remove the three 3/8″ hex-head screws

from the fan motor bracket and remove the motor from the bracket.

Fan Motor Screw (1 or 3)

Bracket

REASSEMBLY NOTES:

• When reinstalling the condenser fan, position the front edge of the blade so it is even with the front edge of the shroud.

Position Condenser Brackets Over Top Edge Of Chassis Pan

15. Pull the evaporator fan off the front shaft of the fan motor.

NOTE: When you perform the following step, be careful not to damage the thin metal vanes of the condenser.

16. Lift the fan motor assembly and condenser fan shroud, and pull the front motor shaft out of the opening in the frame, then remove the assembly from the unit.

17. Pull the condenser fan shroud and condenser fan off the motor.

Keep Blade Edge Even With Edge Of Shroud

• When reinstalling the evaporator fan, make sure that the front edge of the collar is even with the front end of the motor shaft.

Keep Even

4-12

Page 43

REMOVING THE CONDENSATE VALVE BELLOWS

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

2. Remove the unit from the wall sleeve (see pages 2-10 and 2-11 for the procedure).

3. Remove the two hex-head screws from each of the condenser fan shroud mounting brackets and remove the brackets.

5. Tilt the top of the condenser fan shroud forward and pull the left end away from the condenser just far enough to access the condensate valve bellows.

Left Side View

Condenser Fan Shroud

4. Remove the remaining three hex-head screws from the condenser shroud (1 bottom and 2 side screws).

Condenser

Fan Shroud

Shroud Brackets &

Screws (2 each)

Side Screw (1 of 2)

Remove Nut

Condensate Valve Bellows

(Front View)

Loosen Nut

6. Remove the left 5/16″ nylon mounting nut

on the condensate valve bellows, and loosen the right nut approximately half way on the chassis pan stud.

Bottom Screw

4-13

Page 44

REMOVING THE OVERLOAD PROTECTOR

AND THE COMPRESSOR

Electrical Shock Hazard

Disconnect power before servicing.

b) Disconnect the black wire from the com-

pressor terminal, and the black wire from the overload protector terminal.

Black Wires

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

2. Remove the unit from the wall sleeve (see pages 2-10 and 2-11 for the procedure).

3. To remove the overload protector:

a) Remove the hex cap nut and the nylon

flat washer from the terminal cover and remove the cover.

Hex Cap Nut & Nylon Flat Washer

Compressor

Terminals

Overload Protector

REASSEMBLY NOTE: When you reinstall the terminal cover on the compressor, make sure that the overload protector is centered in the gasket hole, and does not sit on any portion of the gasket.

4. To remove the compressor:

a) Remove the overload protector (see

step 3).

b) Disconnect the blue wire from the S (V)

terminal and the red wire from the R (U) terminal of the compressor.

c) Remove the gasket.

Terminal Cover

4-14

Red

Wire

Blue

Wire

Gasket

Page 45

d) Braze on an access valve and dis-

charge the sealed system refrigerant into an approved recovery system.

e) Disconnect the high side line from the

compressor, and the suction line from the accumulator.

g) Lift the compressor from the unit and

remove the three rubber shock mounts.

Suction Line

To Accumulator

High Side Line

To Compressor

f) Remove the three 1/2″ hex bolts from

the compressor’s rubber shock mounts.

Rubber Shock Mount (1 of 3)

1/2″ Hex Bolt

4-15

Page 46

REMOVING THE EVAPORATOR

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

2. Remove the unit from the wall sleeve (see pages 2-10 and 2-11 for the procedure).

3. Braze on an access valve and discharge the sealed system refrigerant into an approved recovery system.

4. Remove the screen, air deflector, and deck from the front of the unit (see steps 3, 4, and 5 on page 4-9).

5. Remove the four hex-head screws from the control chassis, and rotate the chassis down.

4 Control Chassis Screws

6. Remove the two hex-head screws from the evaporator mounting plate, located on the right side of the chassis.

Deck

Air Deflector

Screen

Screws

Evaporator Mounting Plate

4-16

Page 47

7. Pull the indoor thermostat sensing bulb and heat anticipator off the evaporator and position it out of the way.

Sensing Bulb & Heat Anticipator Holder

8. Remove the six front evaporator mounting screws (two from the chassis flange, two from the mounting plate, and two from the chassis pan). Remove the mounting plate from the unit.

9. Lift the evaporator just enough to position it away from the styrofoam holder, and install heat insulation below it.

10. Unbraze the tubing joints at the top and bottom of the evaporator.

Unbraze Tubing Joints

Chassis Flange Screws

Chassis Pan Screws

Mounting Plate Screws

Unbraze Tubing Joint

11. After the evaporator cools, remove it from the unit.

4-17

Page 48

REMOVING THE CONDENSER

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

Condenser

Fan Shroud

Shroud Brackets &

Screws (2 each)

1. Unplug air conditioner or disconnect power.

2. Remove the unit from the wall sleeve (see pages 2-10 and 2-11 for the procedure).

3. Braze on an access valve and discharge the sealed system refrigerant into an approved recovery system.

4. Remove the two hex-head screws from each of the condenser fan shroud mounting brackets and remove the brackets (see the photo at the top of the right column).

5. Remove the remaining three hex-head screws from the condenser shroud (1 bottom and 2 side screws).

6. Tilt the top of the condenser fan shroud forward and pull it away from the condenser just far enough to protect it from the brazing heat.

Side Screw (1 of 2)

Bottom Screw

7. Pull the defrost thermostat sensing bulb from the condenser and move it out of the way.

8. Remove the two condenser hex-head screws from the chassis pan.

Sensing Bulb

Condenser

Chassis Pan Screws

4-18

Page 49

9. Grasp the bottom of the condenser under the two end brackets, and carefully lift the assembly until the bottom of each bracket is positioned over the top edge of the chassis pan. Carefully pull the condenser back just far enough to clear the fan motor assembly when it is removed.

10. Unbraze the three tubing joints (two at the top and one at the bottom) and remove them from the condenser.

11. Remove the condenser from the unit.

Unbraze Tubing Joints

Unbraze Tubing Joint

Position Condenser Brackets Over Top Edge Of Chassis Pan

4-19

Page 50

REMOVING THE SOLENOID COIL & REVERSING VALVE

Coil Wires

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

1. Unplug air conditioner or disconnect power.

2. Remove the unit from the wall sleeve (see pages 2-10 and 2-11 for the procedure).

3. Braze on an access valve and discharge the sealed system refrigerant into an approved recovery system.

5. To remove the reversing valve and so-

lenoid:

a) Remove the solenoid coil (see step 4). b) Unbraze the four tubing joints from the

c) Apply thermal heat trap material around

Solenoid Coil

reversing valve.

the new solenoid and valve to protect them.

Screw

Reversing Valve & Solenoid Coil

4. To remove the solenoid coil (see the

photo at the top of the right column):

a) Disconnect the two wire connectors

from the coil terminals. b) Remove the hex-head screw. c) Slide the coil off the valve.

Solenoid

4 Tubing Joints

Reversing Valve

4-20

Page 51

COMPONENT TESTING

Before testing any of the components, perform the following checks:

• Control failure can be the result of corrosion on connectors. Therefore, disconnecting and reconnecting wires will be necessary throughout test procedures.

• All tests/checks should be made with a VOM or DVM having a sensitivity of 20,000 ohmsper-volt DC, or greater.

Electrical Shock Hazard

Disconnect power before servicing. Replace all parts and panels before

operating. Failure to do so can result in death or

electrical shock.

INDOOR THERMOSTAT

• Check all connections before replacing components, looking for broken or loose wires, failed terminals, or wires not pressed into connectors far enough.

• Resistance checks must be made with power cord unplugged from outlet, and with wiring harness or connectors disconnected.

Refer to page 4-2 for the procedure for servicing the indoor thermostat.

NOTE: The temperature should be above 60°F (15.5°C) to determine the following readings.

1. Unplug air conditioner or disconnect power.

2. Disconnect the wires from the thermostat

terminals.

3. Set the ohmmeter to the R x 1 scale.

4. Clip the black (–) ohmmeter test lead to

terminal 2 (common) and leave it there.

5. Rotate the temperature control fully coun-

terclockwise (Warmer).

6. Touch the positive (+) ohmmeter test lead

to terminal 1. The meter should indicate a closed (0 Ω) circuit.

7. Touch the positive (+) ohmmeter test lead

to terminal 3 (L3). The meter should indicate an open (infinite) circuit.

8. Rotate the temperature control fully clock-

wise (Cooler).

9. Touch the positive (+) ohmmeter test lead

to terminal 1. The meter should indicate an open (infinite) circuit.

10. Touch the positive (+) ohmmeter test lead

to terminal 3 (L3). The meter should indicate a closed (0 Ω) circuit.

5-1

Page 52

Electrical Shock Hazard

Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

MODE (SYSTEM) SWITCH HEAT ANTICIPATOR

Refer to page 4-2 for the procedure for servic-

Refer to page 4-2 for the procedure for servicing the mode (system) switch.

ing the heat anticipator.

1. Unplug air conditioner or disconnect power.

2. Disconnect the wires from the mode switch terminals.

3. Set the ohmmeter to the R x 1 scale.

4. To check the switch contact operation, touch the ohmmeter test leads to the switch terminals shown in the following charts:

SWITCH CONTINUITY

SWITCH POSITION CONTACTS MADE

OFF NONE

L1 - 2

LOW COOL

HIGH COOL

5 - 3 4 - 6 L - 9

COM - L2

L1 - 2

5 - 3 4 - 6

H - 9

COM - L2

SWITCH POSITION CONTACTS MADE

SWITCH CONTINUITY

OFF NONE

FAN ONLY

HIGH HEAT

LOW HEAT

2. Disconnect the heat anticipator wires from the mode switch terminals.

3. Set the ohmmeter to the R x 10K scale.

4. Touch the ohmmeter test leads to the ends of the orange heat anticipator wires. The meter should indicate approximately 56 K Ω .

8 - H

COM - L2

L1 - 8

L1 - 2

5 - 1 7 - 6 H - 9

COM - L2

L1 - 2

5 - 1 7 - 6 L - 9

COM - L2

5-2

Page 53

Electrical Shock Hazard

Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

DEFROST THERMOSTAT (EMERGENCY HEAT SWITCH)

1. Unplug air conditioner or disconnect power.

2. Disconnect the wires from the thermostat terminals.

3. Turn the screwdriver control to the fully counterclockwise (emergency heat) position.

4. Set the ohmmeter to the R x 1 scale.

5. Clip the black (–) ohmmeter test lead to terminal 2 (C2) and leave it there.

6. Touch the positive (+) ohmmeter test lead to terminal 1 (H1). The meter should indicate a closed (0 Ω) circuit.

7. Touch the positive (+) ohmmeter test lead to terminal 3 (L3). The meter should indicate an open (infinite) circuit.

8. Rotate the screwdriver control clockwise. When the control reaches its setpoint, the meter should indicate a closed (0 Ω) circuit.

Refer to page 4-5 for the procedure for servicing the defrost thermostat.

NOTE: Continuity will be read between terminals 2 and 3, providing the temperature of the capillary tube is above 25°F (–4°C). If the temperature at the capillary tube is above 52°F (11°C), it may be necessary to place the end of the capillary tube in ice water to determine if the control is sensing temperature changes.

5-3

Page 54

Electrical Shock Hazard

Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

HOT START RELAY HOT START SENSOR

COIL

Closed Below 50°F Open above 65°F

Refer to page 4-6 for the procedure for servicing the hot start relay.

1. Unplug air conditioner or disconnect power.

2. Disconnect the wires from the relay terminals.

3. Set the ohmmeter to the R x 1 scale.

4. Touch the ohmmeter test leads to the following relay terminals:

1 to 3 = open (infinite) circuit 4 to 5 = closed (0 Ω) circuit

5. Set the ohmmeter to the R x 100 scale.

6. Touch the ohmmeter test leads to the coil (unmarked) terminals. The meter should indicate between 1480 and 1520 Ω.

Refer to page 4-6 for the procedure for servicing the hot start sensor.

1. Unplug air conditioner or disconnect power.

2. Disconnect the wires from the sensor terminals.

3. Set the ohmmeter to the R x 1 scale.

4. Touch the ohmmeter test leads to the sensor terminals. The meter should indicate an open (infinite) circuit at room temperatures above 65°F.

5-4

Page 55

Electrical Shock Hazard

Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

CAPACITOR

Refer to page 4-7 for the procedure for servicing the capacitor.

1. Unplug air conditioner or disconnect power.

2. Disconnect the wires from the capacitor terminals.

3. Set the ohmmeter to the R x 1K scale.

4. Touch one of the ohmmeter test leads to the common (C) terminal and the other test lead to the FAN and HERM terminals.

5. The meter should indicate several ohms and gradually return to infinity at both the FAN & HERM terminals.

FAN CYCLE SWITCH & REMOTE CONTROL UNIT FAN SWITCH

Refer to page 4-7 for the procedure for servicing the fan cycle switch, and page 4-8 for the remote control unit fan switch.

1. Unplug air conditioner or disconnect power.

2. Disconnect the wires from the switch terminals.

3. Set the ohmmeter to the R x 1 scale.

4. Clip one of the ohmmeter test leads to the center (common) terminal and leave it there.

5. Touch the ohmmeter test leads to pins 1 and 3. Depending on the position of the rocker pushbutton, the meter should indicate an open (infinite) circuit at one pin, and a closed (0 Ω) circuit at the other pin.

6. Press the rocker pushbutton to the other switch position, and repeat step 5. The meter readings should be reversed.

5-5

Page 56

Electrical Shock Hazard

Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

HEATER & LIMIT SWITCH (N.C.)

Limit Switch

Heater

Refer to page 4-9 for the procedure for servicing the heater and limit switch.

1. Unplug air conditioner or disconnect power.

2. Disconnect the heater wire from the hot start sensor terminal.

FAN MOTOR

Refer to page 4-10 for the procedure for servicing the fan motor.

1. Unplug air conditioner or disconnect power.

2. Set the ohmmeter to the R x 1 scale.

3. Touch the ohmmeter test leads to the following motor wire connectors. Disconnect one of the wires before you make the measurement:

Black to red = 100 to 110 Ω Yellow to brown = 180 to 200 Ω

3. Set the ohmmeter to the R x 1 scale.

4. To test the heater, touch the ohmmeter test leads to the heater wire connectors. The meter should indicate between 11 and 17 Ω.

5. To test the limit switch, touch the ohmmeter test leads to the terminals. The meter should indicate a closed circuit at room temperature.

5-6

Page 57

Electrical Shock Hazard

Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

OVERLOAD PROTECTOR

Refer to page 4-14 for the procedure for servicing the overload protector.

1. Unplug air conditioner or disconnect power.

2. Disconnect the overload protector wires.

3. Set the ohmmeter to the R x 1 scale.

4. Touch the ohmmeter test leads to the overload protector terminal and connector.

5. The meter should indicate continuity (0 Ω).

COMPRESSOR

Compressor

Terminals

Black

(W)

Blue

(U)

Refer to page 4-14 for the procedure for servicing the compressor.

1. Unplug air conditioner or disconnect power.

(V)

Red

2. Disconnect the three wires from the compressor terminals.

3. Set the ohmmeter to the R x 1 scale.

4. Clip an ohmmeter test lead to the overload protector terminal C (W).

5. Touch the free test lead to the following compressor terminals. The meter should indicate as shown:

Terminal R (U) = 0.5 Ω Terminal S (V) = 3.16 Ω Terminal S (V) to R (U) = 3.65 Ω

5-7

Page 58

Electrical Shock Hazard

Disconnect power before servicing. Replace all parts and panels before operating. Failure to do so can result in death or electrical shock.

SOLENOID COIL

Refer to page 4-20 for the procedure for servicing the solenoid coil.

1. Unplug air conditioner or disconnect power.

2. Disconnect one of the wires from the solenoid coil terminals.

3. Set the ohmmeter to the R x 100 scale.

4. Touch the ohmmeter test leads to the solenoid coil terminals. The meter should indicate between 1480 and 1520 Ω.

5-8

Page 59

DIAGNOSIS & TROUBLESHOOTING

DIAGNOSING THE SEALED SYSTEM

REFRIGERANT CHARGING

The proper refrigerant charge is essential to proper sealed system operation. Operating the unit with an improper refrigerant charge will result in reduced performance and efficiency. The use of proper charging methods during servicing will insure that the unit is functioning as designed, and that its compressor will not be damaged.

Too much (overcharged) or too little (undercharged) refrigerant in the system can be the source of compressor failure if uncorrected for any period of time.

An overcharged system will sometimes return liquid refrigerant back to the suction side of the compressor, and eventually cause a mechanical failure within the compressor. This mechanical failure can manifest itself as valve failure, bearing failure, or some other mechanical failure. The specific type of failure will be influenced by the amount of liquid being returned to the suction line, and the length of time that it continues.

An undercharged system will cause the temperature of the suction gas to increase to the point where it does not provide sufficient cooling for the compressor motor. When this occurs, the motor winding temperature will increase, causing the motor to overheat, and open the compressor’s overload protector. Continued overheating of the motor windings and cycling of the overload, will eventually lead to compressor motor, or overload failure.

METHOD OF CHARGING

The preferred and most accurate method for charging the PTAC system is called the “Weighed in Charge Method,” and is applicable to all units. This method should always be used whenever a charge is removed from a unit for a leak repair, compressor replacement, or when there is no refrigerant charge left in the unit.

To use this method, perform the following steps:

1. Install a piercing valve to remove refrigerant from the sealed system. NOTE: The piercing valve must be removed from the system before recharging.

2. Recover the refrigerant in accordance with EPA regulations.

3. Install a process tube to the sealed system.

4. Make the necessary repairs to the system.

5. Evacuate the system to 300 microns or less.

6. Weigh in the refrigerant with the proper quantity of R-22 refrigerant.

7. Start the unit, and verify its performance.

8. Crimp the process tube closed, and solder the end shut.

6-1

Page 60

AN UNDERCHARGED SYSTEM

An undercharged system will result in poor performance (low pressures) in both the heating and cooling cycle.

Whenever you service a unit with an undercharge of refrigerant, you can usually suspect a leak. The leak must be repaired before charging the unit.

To check for an undercharged system, turn the unit on, and allow the compressor to run long enough (15 to 20 minutes) to establish working pressures in the system.

During the cooling cycle, listen carefully at the exit of the capillary tube into the evaporator. An undercharged system will cause an intermittent “hissing” and “gurgling” sound. Intermittent frosting and thawing of the evaporator is another indication of a low charge. However, frosting and thawing can also be caused by insufficient air over the evaporator.

Check for an undercharged system at the compressor. If the compressor seems quieter than normal, it is an indication of a low refrigerant charge. A check of the amperage drawn by the compressor motor should show a lower reading (check the unit’s specifications).

After the unit has run 10 to 15 minutes, check the gauge pressures.

Gauges connected to an undercharged system will have low head pressures, and substantially low suction pressures.

Undercharged System

6-2

Page 61

AN OVERCHARGED SYSTEM

To help confirm an overcharged system, remove some of the charge. If conditions improve, the system is most likely overcharged. If conditions do not improve, non-condensables (air) are indicated.

Whenever an overcharged system is indicated, always make sure that there are no airflow problems. Improper airflow over the evaporator coil may indicate some of the same symptoms as with an overcharged system.

An overcharge can cause the compressor to fail, since liquid refrigerant is entering the suction line.

The charge for any system is critical. When the compressor is noisy, and you are sure that there is sufficient airflow over the evaporator coils, suspect an overcharge. Icing of the evaporator will not be encountered, because the refrigerant will boil later, if at all. Gauges connected to the system will usually have a higher head pressure (depending upon amount of overcharge). Suction pressure should be slightly higher.

Overcharged System

6-3

Page 62

A RESTRICTED SYSTEM

The following procedures are the more common problems and solutions to the problems of a restricted sealed system. There are two types of refrigerant restrictions:

• Partial restrictions

• Complete restrictions

With a partial restriction, some of the refrigerant will circulate through the system.

With a complete restriction there is no circulation of refrigerant in the system.

When gauges are connected to a completely restricted system, the gauges will run in a deep vacuum. When the unit is turned off, the gauges will not equalize at all.

A quick check for either condition begins at the evaporator. With a partial restriction, there may be a “gurgling” sound at the capillary tube entrance to the evaporator. The evaporator in a partial restriction could be partially frosted, or have an ice ball close to the entrance of the capillary tube. Frost may continue on the suction line back to the compressor.

Restricted refrigerant systems will display the same symptoms as a “low-charge condition.”

When the unit is turned off, the gauges may equalize very slowly.

Often a partial restriction of any type can be found by feeling for a temperature difference from one side of the restriction to the other.

Partially Restricted System

6-4

Page 63

With a complete restriction, there will be no sound at the capillary tube entrance. An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specification. The current drawn may be considerably less than normal, since the compressor is running in a deep vacuum (no load). Much of the area of the condenser will be relatively cool, since most, or all of the liquid refrigerant will be stored there.

CAPILLARY TUBE RESTRICTIONS

All Whirlpool PTAC units are equipped with capillary tubes. When checking for a restricted capillary tube, use the following procedure.

1. Connect pressure gauges to the unit.

2. Start the unit in the “cooling” mode. If the pressures are normal after a few minutes of operation, the check valve and cooling capillary are not restricted.

3. Switch the unit to the “heating” mode, and observe the gauge readings after a few minutes of running time. If the system pressure is lower than normal, the heating capillary is restricted.

4. If the operating pressures are lower than normal in both the heating and cooling modes, the cooling capillary is restricted.

Completely Restricted System

6-5

Page 64

THE REVERSING VALVE

The reversing valve controls the direction of refrigerant flow to the indoor and outdoor coils. The valve consists of a pressure-operated main valve, and a pilot valve that is actuated by a solenoid plunger. The solenoid is energized during the “heating” cycle only. The reversing valve used in the PTAC system is a 2-position, 4-way valve.

The single tube on one side of the main valve body is the high-pressure inlet to the valve from the compressor. The center tube on the opposite side is connected to the low pressure (suction) side of the system. The other two tubes are connected to the evaporator and condenser.

Left Tube To Evaporator Line

Center Tube

Low Pressure

Suction Line

Right Tube To Condenser

Small capillary tubes connect each end of the main valve cylinder to the “A” and “B” ports of the pilot valve. A third capillary is a common return line from these ports to the suction tube on the main valve body. Four-way reversing valves also have a capillary tube from the compressor discharge tube to the pilot valve.

The piston assembly in the main valve can only be shifted by the pressure differential between the high and low sides of the system. The pilot section of the valve opens and closes ports for the small capillary tubes to the main valve, to cause it to shift.

NOTE: The sealed system operating pressures must be near normal before the valve can shift.

Solenoid CoilHigh Pressure Inlet Line

Reversing Valve

6-6

Page 65

TROUBLESHOOTING CHARTS

Refrigerant System—Cooling

Low Suction Pressure High Suction Pressure Low Head Pressure High Head Pressure

Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions

Low Airflow Across

Evaporator

Refrigerant System

Restriction

Moisture In System Defective Compressor Defective Compressor

High Airflow Across

Evaporator

Reversing Valve

Not Fully Seated

Refrigerant System

Restriction

Reversing Valve Not Fully Seated

Undercharged SystemOvercharged SystemUndercharged System

Low Airflow Across

Condenser

Overcharged System

Non-Condensables

(Air) In System

Refrigerant System—Heating

Low Suction Pressure High Suction Pressure Low Head Pressure High Head Pressure

Low Airflow Across

Condenser

Refrigerant System

Restriction

Moisture In System Defective Compressor Defective Compressor

Temperature Too High

Outdoor Ambient

Reversing Valve

Not Fully Seated

Refrigerant System

Restriction

Reversing Valve Not Fully Seated

Undercharged SystemOvercharged System Overcharged SystemUndercharged System

6-7

Outdoor Ambient

Temperature Too High

For Operation In Heating

Low Airflow Across

Evaporator

Non-Condensables

(Air) In System

Page 66

Electrical Troubleshooting—Heat Pump

System Cools When

Heating Is Desired

Is Line Voltage Present

At Solenoid Valve?

YES

Is Solenoid Coil Good?

YES

Reversing Valve Stuck

Replace Reversing Valve

Is Selector Switch

Set For Heat?

Replace Solenoid Coil

6-8

Page 67

WIRING DIAGRAMS & STRIP CIRCUITS

Due to the large number of models for the Packaged Terminal Air Conditioners, the Wiring Diagrams and Strip Circuits will be broken down as follows:

• The charts on this page show the model numbers, the associated wiring diagram numbers, and the pages on which the diagrams are located (parentheses).

Wiring Diagram Charts

Model #

ATE0743BPP 5 (7-7) ATE0743CPP 1 (7-5) ATE0743RPP 5 (7-7) ATE0743SPP 1 (7-5) ATE0753BPP 7 (7-8) ATE0753CPP 3 (7-6) ATE0753RPP 7 (7-8) ATE0753SPP 3 (7-6) ATE0943BPP 5 (7-7) ATE0943CPP 1 (7-5) ATE0943RPP 5 (7-7) ATE0943SPP 1 (7-5) ATE0953BPP 7 (7-8) ATE0953CPP 3 (7-6) ATE0953RPP 7 (7-8) ATE0953SPP 3 (7-6) ATE1243BPP 5 (7-7) ATE1243CPP 1 (7-5) ATE1243RPP 5 (7-7) ATE1243SPP 1 (7-5) ATE1253BPP 7 (7-8) ATE1253CPP 3 (7-6) ATE1253RPP 7 (7-8) ATE1253SPP 3 (7-6) ATE1545BPP 5 (7-7) ATE1545CPP 1 (7-5) ATE1545RPP 5 (7-7) ATE1545SPP 1 (7-5) ATE1555BPP 7 (7-8) ATE1555CPP 3 (7-6) ATE1555RPP 7 (7-8) ATE1555SPP 3 (7-6)

Wiring Diagram #

And (Page #)

• Page 7-2 shows the strip circuit chart for “standard control” models. Page 7-4 shows the strip circuit chart for “remote thermostat” models.

• Each strip circuit has a reference number that is listed in the charts. The “condition” for each strip circuit is shown at the top of each column, along with the page number (parentheses) for the strip circuit.

Model #

ATR0743BPP 6 (7-8) ATR0743CPP 2 (7-6) ATR0743RPP 6 (7-8) ATR0743SPP 2 (7-6) ATR0753BPP 8 (7-9) ATR0753CPP 4 (7-7) ATR0753RPP 8 (7-9) ATR0753SPP 4 (7-7) ATR0943BPP 6 (7-8) ATR0943CPP 2 (7-6) ATR0943RPP 6 (7-8) ATR0943SPP 2 (7-6) ATR0953BPP 8 (7-9) ATR0953CPP 4 (7-7) ATR0953RPP 8 (7-9) ATR0953SPP 4 (7-7) ATR1243BPP 6 (7-8) ATR1243CPP 2 (7-6) ATR1243RPP 6 (7-8) ATR1243SPP 2 (7-6) ATR1253BPP 8 (7-9) ATR1253CPP 4 (7-7) ATR1253RPP 8 (7-9) ATR1253SPP 4 (7-7) ATR1545BPP 6 (7-8) ATR1545CPP 2 (7-6) ATR1545RPP 6 (7-8) ATR1545SPP 2 (7-6) ATR1555BPP 8 (7-9) ATR1555CPP 4 (7-7) ATR1555RPP 8 (7-9) ATR1555SPP 4 (7-7)

Wiring Diagram #

And (Page #)

7-1

Page 68

Strip Circuit Chart For Standard Control Models

Model #

ATE0743CPP#6 - Pg. 7-11 NA ATE0743SPP#6 - Pg. 7-11 NA ATE0753CP ATE0753SP ATE0943CP ATE0943SP ATE0953CP ATE0953SP ATE1243CP ATE1243SP ATE1253CP ATE1253SP ATE1545CP ATE1545SP ATE1555CP ATE1555CP ATR0743CP ATR0743SP ATR0753CP ATR0753SP ATR0943CP ATR0943SP ATR0953CP ATR0953SP ATR1243CP ATR1243SP ATR1253CP ATR1253SPP#6 - Pg. 7-11 #7 - Pg. 7-12 ATR1545CP ATR1545SP ATR1555CP ATR1555SP

Compressor

Cooling

P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 NA P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12

P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12 P#6 - Pg. 7-11 #7 - Pg. 7-12

Compressor

Heating

Electric Heat Reversing Valve

#10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #10 - Pg. 7-13 #8 or #9 - Pg. 7-12 #8 or #9 - Pg. 7-12 #8 or #9 - Pg. 7-12 #8 or #9 - Pg. 7-12 #8 or #9 - Pg. 7-12 #8 or #9 - Pg. 7-12

#8 or #9 - Pg. 7-12 #8 or #9 - Pg. 7-12 #8 or #9 - Pg. 7-12

#8 or #9 - Pg. 7-12

NA NA NA

NA NA NA NA NA NA NA NA NA NA NA NA

NA #7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12

#7, #8, or #9 - Pg. 7-12

#7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12 #7, #8, or #9 - Pg. 7-12

7-2

Page 69

Model # Fan Only

Cool/Heat-

Continuous

Run Fan

Cool-

Cycling

Fan

Heat-Cycling

Fan

ATE0743CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE0743SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE0753CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE0753SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE0943CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE0943SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE0953CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE0953SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE1243CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE1243SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE1253CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE1253SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE1545CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE1545SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE1555CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATE1555CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR0743CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR0743SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR0753CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR0753SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR0943CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR0943SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR0953CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR0953SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR1243CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR1243SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR1253CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR1253SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR1545CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR1545SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR1555CPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11 ATR1555SPP #1 - Pg. 7-10 #2 - Pg. 7-10 #3 - Pg. 7-10 #4 - Pg. 7-11

7-3

Page 70

Strip Circuit Chart For Remote Thermostat Models

Model #

ATE0743BPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE0743RPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE0753BPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE0753RPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE0943BPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE0943RPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE0953BPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE0953RPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE1243BPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE1243RPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE1253BPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE1253RPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE1545BPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE1545RPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE1555BPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATE1555RPP #12 - Pg. 7-14 NA #17 - Pg. 7-17 NA #11 - Pg. 7-14 ATR0743BPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR0743RPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR0753BPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR0753RPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR0943BPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR0943RPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR0953BPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR0953RPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR1243BPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR1243RPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR1253BPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR1253RPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR1545BPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR1545RPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR1555BPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14 ATR1555RPP #12 - Pg. 7-14 #13 - Pg. 7-15 #15 or #16 - Pg. 7-16 #14 - Pg. 7-15 #11 - Pg. 7-14

Compressor

Cooling

Compressor

Heating

Electric Heat

Reversing

Valve

Fan Motor

7-4

Page 71

DIAGRAM #1

WIRING DIAGRAMS

7-5

Page 72

DIAGRAM #2

DIAGRAM #3

7-6

Page 73

DIAGRAM #4

DIAGRAM #5

7-7

Page 74

DIAGRAM #6

DIAGRAM #7

7-8

Page 75

DIAGRAM #8

7-9

Page 76

(#1) FAN ONLY

STRIP CIRCUITS

Standard Control Models

FUSE (265V MODELS ONLY)

SYSTEM SWITCH

L1 H

FAN MOTOR

SYSTEM SWITCH

(#2) COOL OR HEAT—FAN MOTOR CONTINUOUS RUN

FUSE (265V MODELS ONLY)

SYSTEM

SWITCH

L1 3 22

SYSTEM

SWITCH

FAN CYCLE

SWITCH

(9 - H = HIGH)

(9 - L = LOW)

(HIGH)

(LOW)

FAN MOTOR

COM

SYSTEM SWITCH

COM

(#3) COOL—FAN MOTOR CYCLING

FUSE (265V MODELS ONLY)

SYSTEM

SWITCH

L1 2 32

MAIN

THERMOSTAT

BK BU BU

SYSTEM

SWITCH

FAN CYCLE

SWITCH

7-10

(9 - H = HIGH)

(9 - L = LOW)

SYSTEM

SWITCH

(HIGH)

(LOW)

FAN MOTOR

SYSTEM SWITCH

COM

Page 77

(#4) HEAT—FAN MOTOR CYCLING

FUSE (265V MODELS

(9 - H = HIGH)

(9 - L = LOW)

ONLY)

SYSTEM

SWITCH

L1 2 12

MAIN

THERMOSTAT

BK R BU

SYSTEM

SWITCH

FAN CYCLE

SWITCH

(HIGH)

(LOW)

FAN MOTOR

(#5) COMPRESSOR COOLING (HEAT PUMP MODELS)

FUSE (265V MODELS ONLY)

SYSTEM

SWITCH

L1 2 3

THERMOSTAT

BK BU BU

MAIN

SYSTEM

SWITCH

HOT START

RELAY

DEFROST

THERM.

OVERLOAD

COMPRESSOR

SYSTEM SWITCH

COM

SYSTEM SWITCH

COM

(#6) COMPRESSOR COOLING (NON-HEAT PUMP MODELS)

FUSE (265V MODELS ONLY)

SYSTEM

SWITCH

L1 2 3

MAIN

THERMOSTAT

BK BKBU

SYSTEM SWITCH

OVERLOAD

COMPRESSOR

SYSTEM SWITCH

COM

7-11

Page 78

(#7) COMPRESSOR HEATING—HOT START SENSOR OPEN— ROOM ABOVE 65°F (HEAT PUMP MODELS)

FUSE (265V MODELS ONLY)

SYSTEM

SWITCH

L1 2

THERMOSTAT

MAIN

SYSTEM

SWITCH

RBU

HOT START

RELAY

ANTICIPATOR

DEFROST

THERM.

OVERLOAD

OROR

COMPRESSOR

SYSTEM SWITCH

COM

REV. VALVE SOLENOID

(#8) ELECTRIC HEAT—HOT START SENSOR OPEN—ROOM ABOVE 65°F AND OUTDOOR AMBIENT BELOW 47°F (HEAT PUMP MODELS)

FUSE (265V MODELS

ANTICIPATOR

OROR

ONLY)

SYSTEM

SWITCH

L1 2

THERMOSTAT

MAIN

SYSTEM SWITCH

HOT START

RELAY

DEFROST

THERM.

REV. VALVE SOLENOID

LIMIT SW

HEAT

HEATING

ELEMENT

SYSTEM SWITCH

COM

(#9) ELECTRIC HEAT—HOT START SENSOR CLOSED—ROOM BELOW 50°F (HEAT PUMP MODELS)

FUSE (265V MODELS ONLY)

SYSTEM

SWITCH

L1 2 1

MAIN

THERMOSTAT

SYSTEM SWITCH

OR OR

HOT START

RELAY

ANTICIPATOR

HEAT

LIMIT SW

HEATING

ELEMENT

SYSTEM SWITCH

COM

SYSTEM SWITCH

BU WH

REV. VALVE SOLENOID

RELAY COIL

7-12

BKBK

HOT START

SENSOR

BR R

Page 79

(#10) ELECTRIC HEAT (NON-HEAT PUMP MODELS)

FUSE (265V MODELS ONLY)

ANTICIPATOR

OR OR

SYSTEM

SWITCH

L1 2 12

MAIN

THERMOSTAT

BK R

SYSTEM SWITCH

SYSTEM

SWITCH

HEATING

ELEMENT

HEAT

LIMIT SW

SYSTEM SWITCH

COM

7-13

Page 80

Remote Thermostat Models

(#11) FAN MOTOR OPERATION

FAN SPEED

FAN MOTOR

SWITCH

(#12) COMPRESSOR COOLING

COMPRESSOR

OVERLOAD

SUCTION LINE

THERMO

FAN RELAY

COM 24V

TRANSFORMER

COOLING RELAY

WALL THERMO.

FUSE (265V

MODELS ONLY)

FUSE (265V

MODELS ONLY)

COM 24V

TRANSFORMER

7-14

WALL THERMO.

Page 81

(#13) COMPRESSOR HEATING—HOT START SENSOR OPEN— ROOM ABOVE 65°F, REVERSING VALVE ENERGIZED (SEE #14) (HEAT PUMP MODELS)

COMPRESSOR

OVERLOAD

DEFROST

THERM.

HOT START

RELAY

(#14) REVERSING VALVE (HEAT PUMP MODELS)

HEATING

BK BK BK

RELAY

REV. VALVE

SOLENOID COIL

REV. VALVE

RELAY

442

HEATING

RELAY

154132 3

COM 24V

TRANSFORMER

FUSE (265V

MODELS ONLY)

FUSE (265V

MODELS ONLY)

WALL THERMO.

COM 24V

TRANSFORMER

WALL THERMO.

7-15

Page 82

(#15) ELECTRIC HEAT—HOT START SENSOR CLOSED— ROOM BELOW 50°F, REVERSING VALVE ENERGIZED (SEE #14) (HEAT PUMP MODELS)

HOT START

ELECTRIC

BK TN BK

HEATER

LIMIT SW

RELAY

BUBR

HOT START

SENSOR

HEATING

RELAY

COM 24V

TRANSFORMER

WALL THERMO.

FUSE (265V

MODELS ONLY)

(#16) ELECTRIC HEAT—HOT START SENSOR OPEN—ROOM ABOVE 65°F, AND OUTDOOR AMBIENT BELOW 47°F, REVERSING VALVE ENERGIZED (SEE #14) (HEAT PUMP MODELS)

HEATING

RELAY

BK TN

ELECTRIC

HEATER

LIMIT SW

DEFROST

THERM.

BR BU

HOT START

RELAY

HEATING

RELAY

1541 312

FUSE (265V

MODELS ONLY)

7-16

COM 24V

TRANSFORMER

WALL THERMO.

Page 83

(#17) ELECTRIC HEAT (NON-HEAT PUMP MODELS)

HEATER

LIMIT SWITCH

BK BKY

HEATING ELEMENT

HEATING

RELAY

FUSE (265V

MODELS ONLY)

COM 24V

TRANSFORMER

WALL THERMO.

7-17

Page 84

— NOTES —

7-18

Page 85

TECH TIPS

ROUTINE MAINTENANCE

WARNING

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

4. Before reinstalling the chassis in the sleeve, inspect the indoor blower housing, the blower wheel, condenser fan blade, and condenser shroud periodically (every 6 to 12 months). Remove all debris (lint, dirt, mold, fungus, etc.)

5. Clean the blower housing area and blower wheel with an antibacterial / antifungal cleaner.

6. Use a biodegradable cleaning agent and degreaser on the condenser fan and condenser shroud. Use warm or cold water when rinsing these items, and allow them to dry thoroughly before reinstalling them.

NOTE: Units are to be inspected and serviced by qualified Whirlpool service personnel only.

1. Clean the unit air intake filter after 300 to 350 hours of operation with a mild detergent in warm water. Allow the filter to dry thoroughly before reinstalling it.

2. The indoor (evaporator) coil, the outdoor (condenser) coil, and base pan should be inspected periodically (every 6 to 12 months), and cleaned of all debris (lint, dirt, leaves, paper, etc.). Clean the coils and base pan with a soft brush and compressed air, or vacuum.

If you use a pressure washer, be careful not to bend the aluminum fin pack. Use an up and down sweeping motion in the direction of the vertical aluminum fin pack. Cover all electrical components to protect them from water. Allow the unit to dry thoroughly,

3. Inspect all gasket material for deterioration.

IMPORTANT: Do not use a caustic coil cleaning agent on the coils or base pan. Use only a biodegradable cleaning agent.

7. Periodically (every 6 to 12 months) inspect all control components, both electrical and mechanical, as well as the power supply. Use the proper testing instruments (voltmeter, ohmmeter, ammeter, wattmeter, etc.) to perform any electrical tests.

8. Use an air conditioning or refrigeration thermometer to check room, outdoor, and coil operating temperatures. Use a sling psychrometer to measure wet bulb temperatures indoors and outdoors.

9. Inspect the inside and outside surrounding areas to ensure that the unit clearances have not been compromised or altered.

10. Inspect the wall sleeve and drain system periodically (every 6 to 12 months) and clean them of all obstructions and debris. Clean both areas with an antibacterial and antifungal cleaner, and rinse both items thoroughly with water. Make sure that the drain outlets are operating correctly. Check the sealant around the sleeve and reseal any areas, as needed.

11. Clean the front cover with a mild detergent and warm water, and allow it to dry thoroughly before installing it in the chassis.

8-1

Page 86

ACCESSORIES

PART NUMBER DESCRIPTION PHOTO

WALL SLEEVE:

• G-90 zinc coated steel is prepared in an eleven-step process, then electrostatically

4396585

4396586

4396591 4396595

4396587

coated with a polyester finish, and cured in an oven for exceptional durability.

• The wall sleeve is insulated for thermal efficiency. 16″ H x 42″ W x 13-3/4″ D.

STANDARD GRILLE:

• Stamped aluminum.

• Anodized to resist chalking and oxidation.

ARCHITECTURAL LOUVERS:

• Heavy-gauge 6063-T5 aluminum alloy.

• Clear, extruded aluminum.

• Dark bronze acrylic enamel.

• Also available in custom colors.

CONDENSATE DRAIN KIT:

• Attaches to the bottom of the wall sleeve for internal draining of condensate or to the rear wall sleeve flange for external draining.

• Recommended on all units to remove excess condensate.

• Packaged in quantities of ten.

4396594

4396592

4396590

DEEP WALL SLEEVE EXTENSION:

•4″ deep anodized aluminum extension that attaches to the outside of the wall sleeve when the wall is thicker than 13″ thick (11-3/4″ when a subbase is used, 12-3/4″ when a lateral duct is used).

DECORATIVE SUBBASE:

• Provides unit support for walls less than 6″ thick.

• Includes leveling legs, side filler panels and mounting brackets for electrical accessories.

• Accepts a circuit breaker, power disconnect switch, or conduit kit.

DESK CONTROL KIT:

• A field installed kit which allows the unit to be turned On or Off from a remote location.

8-2

Page 87

PART NUMBER DESCRIPTION PHOTO

CONDUIT KIT WITH JUNCTION BOX:

• Makes field wiring connections for direct

4396597

4396593

4396583

wired 265V PTAC/PTHPs.

• Kit includes a means of quick-disconnect for easy removal of the chassis.

• It can be used with or without a subbase.

DIGITAL REMOTE THERMOSTAT:

• A Honeywell wall-mounted remote thermostat. Requires a single stage cooling and heating thermostat.

SLEEVE EXTENSION RETROFIT KIT:

• G-90 zinc coated steel, 2.4″ sleeve extension attached to the room-side of the sleeve to allow for the installation of a P-Series unit.

LATERAL DUCT ADAPTER:

4396600

LATERAL DUCT EXTENSION:

4396601

REPLACEMENT FILTER PACK:

ATXFT0

Additional Components:

• Attaches to the PTAC/PTHP unit and provides a transition to direct up to 35% of the total CFM to a secondary room, either left or right of the unit.

• Kit includes duct plenum with a discharge grille.

• A three foot insulated plenum that attaches to the left or right side of the duct adapter.

• The extension can be cut to length by the installer.

• Original equipment return air filters.

• Reusable and can be cleaned by vacuuming or washing.

4396598 Disconnect Switch: Installed in the subbase and provides a means for disconnect-

4396602 Front Cover Side Modifies the method of attaching the front cover when the

Mount Kit: PTAC/PTHP is mounted close to or against the floor.

ing power to the PTAC/PTHP.

8-3

Page 88

OPTIONAL DESK CONTROL UNIT

The desk control unit allows the air conditioner to be turned off and on from a remote location. The unit consists of a pair of switches that are controlled by a 24-volt relay.

DESK CONTROL RELAY (N.C.)

TO PTAC

SELECTOR

SWITCH

When the desk control switch is closed, the 24volt supply is applied to the relay coil,the contacts open, and the air conditioner will not

The main power supply is wired in series through the relay contacts. When the desk control switch is open, the 24-volt supply is removed from the relay coil, the contacts are closed, and the air conditioner will operate.

L1 POWER SUPPLY

L2 POWER SUPPLY

24 VOLTS FROM DESK

operate.The air conditioner will not run as long as the 24 volts is present at the desk control unit.

TO PTAC

SELECTOR

SWITCH

DESK CONTROL RELAY (N.C.)

L1 POWER SUPPLY

L2 POWER SUPPLY

24 VOLTS FROM DESK

8-4

Page 89

GENERAL TROUBLESHOOTING

If the PTAC/PTHP is not working satisfactorily, follow these basic troubleshooting suggestions.

Being familiar with the sequence of operation on Standard Controlled Operating Units or the operation of the Remote Thermostat Controlled Units is important. The following questions and answers may help to identify performance problems.

ENVIRONMENTAL EFFECTS— COOLING MODE

• Is the PTAC/PTHP sized to the room size area and the cooling load demand? Room

width x length x 3.5 equals an approximation of the number of BTU’s required for the area. Other factors can affect the number of BTU’s required for an area, such as, the number of electrical devices, solar gains, etc. Consider these factors when sizing the PTAC/PTHP for your application.

• Is the outdoor temperature 60°F (15.6°C) or below? The PTAC/PTHP is designed for proper cooling operation at outdoor temperatures above 60°F (15.6°C).

• Is the indoor temperature 80°F (26.7°C) or above? Ambient indoor temperatures of 80°F (26.7°C) or above will take a longer period of run time to cool down the area. Long run times may indicate that the PTAC/PTHP is undersized.

• Is indoor humidity high? This condition will cause the PTAC/PTHP to operate longer to remove humidity before noticing any cooling effect.

• Has the cooling load been increased by

additional devices such as computer equipment or has the room area been increased where the PTAC/PTHP is located? If conditions have changed, the

PTAC/PTHP may not be able to cool and condition as effectively as previously planned.

ENVIRONMENTAL EFFECTS— HEATING MODE

• Is the PTAC/PTHP properly sized to the room area and heat load demand? Multi-

plying the width x length x 3.5 provides an approximation of the number of BTU’s required for the area. Other factors can affect the number of BTU’s required for an area, such as, the number of electrical devices, solar gains, etc. Consider these factors when sizing the PTAC/PTHP for your application.

• Is the outdoor temperature 70°F (21.1°C) or above? The PTAC/PTHP is designed for proper heating operation at outdoor temperatures below 70°F (21.1°C).

• Is the indoor temperature 60°F (15.6°C) or below? Ambient indoor temperatures of 60°F (15.6°C) or below will take a longer period of run time to heat the area. Long run times may indicate that the PTAC/PTHP is undersized.

• Has the room area been increased where the PTAC/PTHP is located? If the area where the PTAC/PTHP is located has been increased, the PTAC/PTHP may not provide adequate heat.

INSUFFICIENT MAINTENANCE AND INSPECTION

Installation errors are the most common cause of poor performance. Please follow the installation instructions carefully.

8-5

Page 90

— NOTES —

8-6

Page 91

PRODUCT SPECIFICATIONS

AND

WARRANTY INFORMATION SOURCES

IN THE UNITED STATES:

FOR PRODUCT SPECIFICATIONS AND WARRANTY INFORMATION CALL:

FOR WHIRLPOOL PRODUCTS: 1-800-253-1301 FOR KITCHENAID PRODUCTS: 1-800-422-1230 FOR ROPER PRODUCTS: 1-800-447-6737

FOR TECHNICAL ASSISTANCE WHILE AT THE CUSTOMER’S HOME CALL:

THE TECHNICAL ASSISTANCE LINE: 1-800-253-2870

HAVE YOUR STORE NUMBER READY TO IDENTIFY YOU AS AN

AUTHORIZED SERVICER

FOR LITERATURE ORDERS:

PHONE: 1-800-851-4605

FOR TECHNICAL INFORMATION AND SERVICE POINTERS:

www.servicematters.com

IN CANADA:

FOR PRODUCT SPECIFICATIONS AND WARRANTY INFORMATION CALL:

1-800-461-5681

FOR TECHNICAL ASSISTANCE WHILE AT THE CUSTOMER’S HOME CALL:

THE TECHNICAL ASSISTANCE LINE: 1-800-488-4791

HAVE YOUR STORE NUMBER READY TO IDENTIFY YOU AS AN

AUTHORIZED SERVICER

Page 92

CORPORATION