Carrier 52C Users Manual

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52C,P

SERIES

PTAC Customer Support Center

1•800•894•6449

SERVICE TECHNICIAN GUIDE

PACKAGED TERMINAL AIR CONDITIONERS

AND HEAT PUMPS

CONTENTS Page

INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2,3

SUMMARY OF DANGERS, WARNINGS,

AND CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

UNIT DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . .3,4

TOOLS NEEDED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

REMOVE FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . 3

DISCONNECT POWER FOR

CORD-CONNECTED UNIT . . . . . . . . . . . . . . . . . . . . . 3

DISCONNECT POWER FOR PERMANENTLY

CONNECTED (HARDWIRED) UNITS . . . . . . . . . . . . 3

OPEN THE CONTROL BOX. . . . . . . . . . . . . . . . . . . . . 4

REMOVE THE UNIT FROM THE WALL SLEEVE . . 4

ACCESSING UNIT COMPONENTS . . . . . . . . . . . . . .5-8

ACCESSING INDOOR-AIR SECTION

COMPONENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

ACCESSING OUTDOOR-AIR SECTION

COMPONENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

REINSTALL FRONT PANEL. . . . . . . . . . . . . . . . . . . . . 8

GENERAL CLEANING . . . . . . . . . . . . . . . . . . . . . . . . .9-12

CLEANING AND SAFETY . . . . . . . . . . . . . . . . . . . . . . 9

TOOLS NEEDED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

MONTHLY CLEANING. . . . . . . . . . . . . . . . . . . . . . . . 10

SEASONAL CLEANING . . . . . . . . . . . . . . . . . . . . . . . 11

COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-17

COMPRESSOR TROUBLESHOOTING. . . . . . . . . . . 14

BASIC HERMETIC COMPRESSOR

ELECTRICAL MEASUREMENTS . . . . . . . . . . . . . . . 14

COMPRESSOR REPLACEMENT. . . . . . . . . . . . . . . . 15

Page

HEATERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,19

COMMON CAUSES OF HEATER FAILURE. . . . . . . 18

HEATER REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

OPERATING CONTROLS. . . . . . . . . . . . . . . . . . . . . 20-28

UNIT-MOUNTED CONTROLS. . . . . . . . . . . . . . . . . . 20

WALL-MOUNTED THERMOSTAT CONTROLS. . . 21

REMOTE THERMOSTAT

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 21

DESCRIPTION OF SELECTOR

SWITCH SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

NON-USER ADJUSTABLE CONTROLS . . . . . . . . . . 23

SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . 24

COMPONENT OPERATION AND

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 24

ELECTRICAL COMPONENTS REMOVAL

AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . 27

FAN MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-31

FAN MOTOR TROUBLESHOOTING. . . . . . . . . . . . . 29

BASIC FAN MOTOR ELECTRICAL TESTS. . . . . . . . 29

FAN MOTOR REPLACEMENT. . . . . . . . . . . . . . . . . . 31

FIELD TEMPERATURE CHARTS . . . . . . . . . . . . . . 32-40

WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . 41-45

MOST FREQUENT PTAC SERVICE

QUESTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

ACCESSORIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

52C PERFORMANCE AND PHYSICAL DATA. . . . . . 48

52P PERFORMANCE AND PHYSICAL DATA. . . . . . 49

52C,P

SERIES

INTRODUCTION

The focus of this manual is to provide basic information

on service procedures, safety, troubleshooting, clean-

ing, and component replacement for service techni-

cians. It is intended for use only by HVAC service

technicians who have successfully completed

instruction and received Type I Certification

from the U.S. Environmental Protection Agency.

The instructions in this manual are general in nature

and are not to be substituted for installation and ser-

vice instructions shipped with the unit. No attempt to

install, operate, adjust, repair, or dismantle any equip-

ment should be made until the manufacturer’s instruc-

tions are read and thoroughly understood by the

service technician. Even equipment that seems famil-

iar may have specific model differences from year to

year. Always review manufacturer’s instructions.

Model 52C,P packaged terminal air conditioner

(PTAC) and heat pump units are self-contained for

installation through the wall for individual room heat-

ing and cooling. The Model 52C,P polymer and metal

sleeves are permanently fastened to the wall; the unit

chassis slides out of the sleeve to allow the service

technician easy access. Many accessories are offered

to complement the unit’s performance and comfort

control.

Before beginning any service procedures, it is impor-

tant to check the unit model number. See Figure 1 and

2. Units that seem similar may have subtle differences

that could affect service procedures. The following

units are covered in this manual:

52CE — 60 Hz cooling with electric heat units

52CQ — 60 Hz heat pump with electric heat units

52PE — 60 Hz cooling with electric heat units

52PQ — 60 Hz heat pump with electric heat units

52PC — 60 Hz cooling only units

Knowing which model is being serviced will help deter-

mine if the unit is performing at optimum levels. The

model number is located on the data information plate

beneath the front panel of the unit. See Figure 1. The

data information plate also lists voltage ranges and

other important electrical information about the unit.

SUMMARY OF DANGERS, WARNINGS,

AND CAUTIONS

The terms DANGER, WARNING, and CAUTION have

specific meanings that identify the degree of hazard.

Typically in the HVAC industry, these specific mean-

ings are:

There is an immediate hazard which WILL result

in severe personal injury or death.

Hazards or unsafe practices which COULD

result in severe personal injury or death.

Potential hazards or unsafe practices which

COULD result in minor personal injury or equip-

ment damage.

CANADIAN INSTALLATION

SERIAL 3701X11520

DATE OF MFG. 09/12/2001

VOLT RANGE 187-253

VOLTS 230/208

PH 1

MODEL 52PQA312301AA

HZ 60

MIN CKT AMPACITY 19.3

R-22 OZ 34

DESIGN PSIG 350 HIGH SIDE, 150 LOW SIDE

COOLING

HEATING

BTU/HR 12,100/12,000

AMPS 4.8/5.3

WATTS 1090/1122

EER 11.1/10.7

MOTOR

FAN

COMP

FLA

RLA

LRA

6.1

0.75

1/8

BTU/HR 11,000/11,000

AMPS 15.6/14.5

WATTS 3570/2997

COP 3.2/3.2

HEATER

BTU/HR

AMPS 14.8/13.7

WATTS 3400/2850

WATER

STEAM

20 20

USE

TIME DELAY FUSE

OR HACR TYPE

CIRCUIT BREAKER

AMP

AMP AMP

MAX FUSE MAX BREAKER

FIGURE 1 — SAMPLE DATA INFORMATION

PLATE

UNIT DISASSEMBLY

This section includes common procedures for disas-

sembly and re-assembly of unit.

TOOLS NEEDED

The following field-supplied items are recommended

for general disassembly of the unit:

• Flat head screw driver

•5/16-in. nut driver

• Safety glasses

• Needle nose pliers

REMOVE FRONT PANEL

NOTE: Before removing front panel, remove 2 locking

screws (if installed) located behind the filter handles.

See Figure 3. If a lateral duct accessory is installed, the

plenum must be removed before removing the front

panel. Refer to Remove Lateral Duct Extension section

for removal instructions.

1. Grasp the front panel firmly at the center of the

top and bottom of the panel.

2. Pull the panel upward at the bottom and forward

at the top to release magnetic latches and partition

hooks. See Figure 4.

DISCONNECT POWER FOR

CORD-CONNECTED UNIT

1. Turn selector switch to OFF position.

2. Open the disconnect switch at main power supply.

Use proper Lockout and Tag procedures.

3. Unplug the unit service cord.

DISCONNECT POWER FOR

PERMANENTLY CONNECTED

(HARDWIRED) UNITS

1. Turn selector switch to OFF position.

2. Open the disconnect switch at main power supply.

Use proper Lockout and Tag procedures.

3. Remove screw from access cover and remove

access cover.

4. Pull out the plug assembly and disconnect. See

Figure 5.

IMPORTANT: Follow manufacturer’s instruc-

tions when disassembling and re-assembling a

unit for cleaning, maintenance, or part replace-

ment. When disassembling wiring, it is strongly

recommended that numbered stickers be

attached to identify leads and terminals to aid in

the re-assembly process. Always review safety

procedures prior to the start of a job.

Prior to servicing electrical equipment, discon-

nect all power to avoid electric shock! Tag all dis-

connects. Never alter cord or plug and do not use

extension cords.

Electrical Data

3 – 230/208-v, 60 Hz

4 – 265-v, 60 Hz

Cooling Capacity (nominal)

07 – 7,000 Btuh

09 – 9,000 Btuh

12 – 12,000 Btuh

15 – 15,000 Btuh

52 PQ A 3 12 3 0 1 AA

Series Designation

PTAC (Packaged Terminal Air Conditioner)

Non-Performance

Changes 0-9

Chassis Options

Blank or AA – Standard

CP – Corrosion Protection

RC – Wall Thermostat Control

RP – Wall Thermostat Control with

Corrosion Protection

CE – Cooling with Electric Heat

CQ – Heat Pump with Electric Heat

PC – Cooling Only

PE – Cooling with Electric Heat

PQ – Heat Pump with Electric Heat

Packaging

1 – Domestic

Latest Revision

A – Z

Electric Heater Size

0 – No Heating (Cooling Only Model)

2 – 2.3 kW

3 – 3.4 kW

5 – 5.0 kW

FIGURE 2 — MODEL NUMBER NOMENCLATURE

52C,P

SERIES

OPEN THE CONTROL BOX

The control box is factory wired. To open the box,

remove the 2 screws on the top of the control box and

lower the front hinged panel. See Figure 6.

REMOVE THE UNIT FROM THE

WALL SLEEVE

1. Remove the four mounting screws that secure the

PTAC unit to the wall sleeve (2 screws per side).

See Figure 7.

2. Grasp the sides of the unit and slide it from the

sleeve.

NOTE: The mounting screws may be in a different

location depending on brand of wall sleeve

attached.

The chassis weighs between 110 and 150 lbs. Take

proper safety precautions to avoid personal injury

when lifting and moving the chassis.

The unit basepan may have water in it. Tilt the

unit back slightly when removing it from the sleeve

to drain some of the water into the sleeve.

CONDUIT ACCESS

PANEL

MOLEX

PLUGS

FIGURE 5 — PLUG ASSEMBLY ON

HARDWIRE UNITS

REMOVABLE

FILTER

LOCATION OF

REMOVED FILTER

LOCKING SCREW

(NOTE: 2nd LOCKING SCREW

IS LOCATED BEHIND

2nd FILTER)

FIGURE 3 — LOCATION OF LOCKING SCREWS

BEHIND FILTERS

FIGURE 4 — REMOVING FRONT PANEL

eplacement Package Terminal Air Conditioner,

LASSIFIED BY UNDERWRITERS LABORATO-

IES INC., AS TO ELECTRIC SHOCK, FIRE AND

ASUALTY HAZARDS ONLY. FOR FIELD INSTAL-

ATION WITH EXISTING WALL SLEEVES, OUT-

OOR, LOUVERS, AND INDOOR PANELS AS

PECIFIED ON THE PRODUCT.

ACCESSING UNIT COMPONENTS

ACCESSING INDOOR-AIR SECTION

COMPONENTS

■ REMOVE LATERAL DUCT EXTENSION

ACCESSORY FOR UNITS EQUIPPED WITH THE

LATERAL DUCT

1. Remove the 2 top screws that secure the lateral

duct plenum to the top of the lateral duct exten-

sion. See Figure 8.

2. Locate and remove the 2 bottom bracket screws

(located opposite extension duct) that secure the

lateral duct plenum to the bracket flange. See

Figure 8.

3. Carefully lift the plenum up and away from front

panel and duct extension.

■ REMOVE THE DISCHARGE DECK ASSEMBLY

1. Remove the front panel. Refer to Remove Front

Panel section and Figure 4.

2. Remove discharge screen screw using a 5/16-in. nut

driver. See Figure 9.

3. Remove the discharge deck assembly screws using

a 5/16-in. nut driver. See Figure 9.

4. Gently pull the deck/grille up and away from the

unit.

5. Reassemble by reversing steps above.

■ ACCESSING THE HEATER ASSEMBLY — Once the

discharge deck assembly is removed, the Heater

Assembly should now be accessible. See Figure 10.

1. Using pliers, carefully remove all wires connected

to the heater assembly. Label each wire for ease of

re-assembly.

2. Gently pull the heater assembly up and away

from scroll. See Figure 11.

3. Reassemble by reversing steps above.

ACCESSING OUTDOOR-AIR SECTION

COMPONENTS

■ REMOVE THE GUSSETS (See Figure 12)

1. Remove the 2 screws on each side that secure the

gussets to the partition.

2. Remove the 2 screws that secure the gussets to

the plastic condenser orifice and remove the

gussets.

POWER

CORD

ACCESS

COVER

POWER

CORD

CONTROL

BOX

SCREWS

GE WALL

SLEEVE

HOLES

AMANA, TRANE

(SLOTTED

HOLES) WALL

SLEEVE HOLES

VARIOUS ATTACHMENT

HOLE LOCATIONS

CARRIER, BRYANT

WALL SLEEVE

HOLES

FIGURE 6 — CONTROL BOX COVER

FIGURE 7 — PTAC UNIT TO WALL

SLEEVE MOUNTING SCREWS

52C,P

SERIES

■ DETACH THE CONDENSER ORIFICE FROM THE

CONDENSER COIL

1. Remove top half of condenser orifice.

a. Unscrew the top half of the condenser orifice by

backing off the 4 captive screws. See Figure 13.

b. Using a flat head screwdriver, gently pry the

top half of the orifice from the tube sheets. See

Figure 14.

c. Remove top of condenser orifice. See Figure 15.

2. Remove bottom half of condenser orifice.

a. Using a flat head screwdriver, gently pry the

bottom half of the orifice from the tube sheets.

See Figure 14.

b. Remove 2 outdoor coil tube sheet screws using a

Phillips head screwdriver. See Figure 16.

c. Carefully lift condenser up and away from con-

denser fan. Rest condenser on basepan. See

Figure 17.

d. Using Needle Nose Pliers remove condenser fan

hub clamp. See Figure 18.

e. Pull condenser fan off fan motor shaft.

f. Remove bottom half of condenser orifice.

3. Reassemble by reversing steps above.

■ REMOVE THE AIR DISCHARGE GRILLE

1. Remove the front panel from the unit, reference

Remove Front Panel section.

2. Flip the front panel over to the backside. Remove

the 2 screws on each end of the air discharge grille

and remove grille. See Figure 19.

The grille can be positioned to direct the

discharge air up or out by simply rotating

the grille 180 degrees.

END CAP

LEFT

BRACKET

SCREWS

PLENUM LATERAL DUCT

EXTENSION

WALL

TOP

SCREWS (2)

BRACKET

SCREWS

RIGHT

BRACKET

ATTACHMENT

SCREWS

DISCHARGE

SCREEN

DISCHARGE

DECK

DISCHARGE DECK

HEATER PLATE

ASSEMBLY

FIGURE 8 — PTAC UNIT WITH LATERAL

DUCT ACCESSORY INSTALLED

FIGURE 9 — LOCATION OF ATTACHMENT

SCREWS ON DISCHARGE DECK OF UNIT

FIGURE 10 — ACCESSING HEATER

PLATE ASSEMBLY

FIGURE 11 — REMOVAL OF HEATER

PLATE ASSEMBLY

GUSSET

SCREWS

GUSSET

SCREWS

PARTITION GUSSET

CONDENSER

ORIFICE (PLASTIC)

GUSSET

CONDENSER

ORIFICE

CAPTIVE

SCREWS (2)

CAPTIVE

SCREWS (2)

FIGURE 12 — GUSSET REMOVAL

FIGURE 13 — LOCATION OF CAPTIVE SCREWS

ON CONDENSER ORIFICE

FIGURE 14 — PRYING CONDENSER ORIFICE

AWAY FROM TUBE SHEET

FIGURE 15 — REMOVING TOP OF

CONDENSER ORIFICE

52C,P

SERIES

REINSTALL FRONT PANEL

1. Grasp the front panel firmly at the center of the

top and bottom of the panel, tilting it forward 5 to

10 degrees from the vertical. See Figure 4.

2. Place the top of the front panel onto the unit,

making sure the top engagement posts have

engaged the slots on the unit. The top edge of the

front panel should be flat against the top of the

unit.

3. Gently lower the front panel onto the chassis,

ensuring the conduit/cord is routed through the

panel notch. Magnetic latches at the bottom of the

front panel will secure the front panel to the unit.

HUB CLAMP

CONDENSER

FAN

SCREW SCREW

DISCHARGE

GRILLE

FRONT PANEL

(BACK VIEW)

CONTROL DOOR

HINGE PINS

FIGURE 18 — REMOVING CONDENSER

FAN HUB CLAMP

FIGURE 19 — LOCATION OF SCREWS ON

DISCHARGE GRILLE

OUTDOOR COIL TUBE

SHEET SCREWS

FIGURE 16 — LOCATION OF OUTDOOR

COIL TUBE SHEET SCREWS

FIGURE 17 — REMOVING OUTDOOR COIL

FROM CONDENSER FAN

GENERAL CLEANING

Maintaining proper performance of 52C,P systems

requires conscientious cleaning and care of compo-

nents. See Figure 20. Specific components require

periodic cleaning and/or replacement, including the

following:

COMPONENT CLEANING SCHEDULE

CLEANING AND SAFETY

Before starting to clean a unit, read the instructions

thoroughly and gather the necessary tools for the job.

Review all safety information on unit and in literature.

Indoor Air Filter Monthly

Vent Air Filter Monthly

Indoor Coil Seasonally

Indoor Fan Seasonally

Outdoor Coil Seasonally

Before cleaning, servicing, performing maintenance,

or removing the chassis from the wall sleeve, discon-

nect all power to the unit to avoid the possibility of

electrical shock and personal injury. Only trained

and qualified service personnel should perform

installation and service procedures on these units.

Untrained personnel may perform basic mainte-

nance tasks such as cleaning and replacing filters.

Refer to General Disassembly section of this manual

for proper procedures to disconnect power to 52C,P

units.

Consider the following safety issues before

beginning:

• New and unfamiliar tasks should be performed

under the supervision of an experienced service

technician.

• Personal protective equipment, such as safety

glasses and work gloves, should be used.

• The floor around the work area should be clean and

free of debris.

• The 52C,P unit weighs up to 150 pounds. Use a lift-

ing device or ask for assistance if the unit must be

moved.

• Make sure tools are the correct tools for the job,

and that they are working properly and in good

condition.

FRONT

PANEL

(STANDARD)

EXTERIOR

GRILLE

(ACCESSORY)

CHASSIS

(STANDARD)

WALL SLEEVE

(ACCESSORY)

FIGURE 20 — STANDARD 52C UNIT

52C,P

SERIES

TOOLS NEEDED

The following list includes the recommended tools,

devices, and cleaning solutions for use in cleaning the

52C,P unit and components.

MONTHLY CLEANING

■ AIR FILTERS — The indoor and vent air filters

should be cleaned once per month. Filters that are not

cleaned become clogged and will restrict airflow. This

may lead to major component damage. If a filter

becomes torn, has holes, or other damage, replace it

with a new one. Replacement filters are available

through Carrier Finished Goods and Carrier Replace-

ment Component Division.

■ CLEANING THE INDOOR AIR FILTER — Two air

filters are located in the unit’s front panel. To remove

each filter simply grasp each filter handle with both

hands and gently pull the filter up and away from the

unit. See Figure 21.

■ REPLACING THE INDOOR AIR FILTER —

Remove the indoor air filter as detailed in Cleaning

the Indoor Air Filter. If damaged, use a filter replace-

ment with the Carrier Part No. AIR-FILTER-10PK,

available through Carrier Finished Goods and Carrier

Replacement Component Division.

NOTE: Both filters are completely interchangeable.

■ CLEANING THE OUTDOOR AIR VENT FILTER

1. Remove the unit chassis from wall sleeve as

described in the General Disassembly section of

this manual. Refer to Remove the Unit from

the Wall Sleeve section.

2. Swing open vent door. The filter is located directly

behind the vent door. See Figure 22.

3. Once the filter is accessed, it may be cleaned using

either a vacuum cleaner, or a soft bristle brush

and a small amount of mild dish detergent. If

detergent is used, remove detergent residue with

a gentle, clean water stream. Allow the filter to

air dry.

■ REPLACING THE OUTDOOR AIR VENT FILTER —

If vent filter requires replacement:

1. Open vent door to access vent filter.

2. Remove vent door from hinges.

3. Using a small flat head screwdriver, pry the filter

from the partition.

4. Replace vent filter using Carrier Part No.

52CQ500144.

5. Reverse Steps 1-3 to reattach vent door.

■ CHASSIS

Occasional cleaning of the exterior surfaces of the

PTAC unit optimizes the unit’s appearance and

removes particles that may enter the air system. See

Figure 23. Mild detergents clean and reduce electro-

static charges on the plastic components of the PTAC

unit.

Use a clean cloth or brush to gently wipe exterior sur-

faces. Be careful not to push dirt or other fibers into

the unit’s interior components. Accessible wall sleeve

surfaces should also be wiped clean.

Vacuum Cleaner with Crevice Tool Attachment,

or Soft Plastic Bristle Brush

Mild Household Detergent

Phillips Head Screwdriver

5/16-in. Nut Driver

Flat Head Screw Driver

Needle Nose Pliers, 90° Bend

Lifting Device (or another person for assistance)

Tank Sprayer (Part No. P9021001) or

Trigger Spray Extension Tube (Part No. P9029000)

Compressed Air Tank

Clean Water Supply

Indoor Air Filter Replacement

(Part No. AIR-FILTER-10PK)

Vent Air Filter Replacement (Part No. 52CQ500144)

Condenser Coil Cleaning Solution (Part No. P9020501)

Evaporator Coil Cleaning Solution (Part No. P90221001)

10-in. by 29-in. Piece of Clean Cardboard

3% Solution of Hydrogen Peroxide in Spray Bottle

Clean Cloth

Safety Glasses

Protective Gloves

SEASONAL CLEANING

The indoor and outdoor coils should be cleaned at least

once during every season. Refer to ACCESSING

UNIT COMPONENTS section to prepare unit.

■ CLEANING THE INDOOR AND OUTDOOR

COILS

1. Use a vacuum cleaner or soft bristle brush to

remove surface fibers and dirt from the interior

surface of evaporator coil and both surfaces of con-

denser coil. See Figure 24. It is important to apply

the tool in the same direction of the fins, not

against them. Applying the tool against the fins

may cause damage (fin edges may bend over).

2. With a tank sprayer or a trigger spray extension

tube, spray coil cleaning solution evenly across

the coils, making sure coils are thoroughly satu-

rated. See Figure 25. Refer to instructions on the

cleaning solution containers for best results. Do

not use a high-pressure sprayer.

3. Rinse the coils thoroughly with low-velocity, clean

warm water (less than 200 F).

4. Repeat steps 2 and 3 for each coil surface.

5. Drain water and cleaning solution that may have

collected in the basepan during the cleaning pro-

cess by carefully tilting the chassis. This allows

excess water to flow out of the overflow notches.

6. Thoroughly clean the basepan and drain passages

by rinsing with clean water. Be sure all debris is

removed from the drain valve. See Figure 26.

7. Thoroughly clean outdoor fan assembly and all

other mechanical components located in outdoor

coil area. Be sure to remove all dirt and debris.

8. Clean wall sleeve.

■ CLEANING THE INDOOR FAN AND FAN

SCROLL — Dried debris and build-up on the blower

wheel and fan scroll can reduce the efficiency of the

unit.

1. ACCESS AND CLEAN INDOOR FAN AND

FAN SCROLL

a. Reach behind the indoor coil and vacuum any

loose debris from the condensate drain pan, fan

and other areas accessible to the fan scroll,

being careful to avoid damage to the coil fins.

b. Use mild detergent and a damp cloth to remove

stubborn debris from surfaces around scroll and

fan blades.

2. CLEAN HEATER ASSEMBLY — Use com-

pressed air to blow off any dirt or dust that has

accumulated on the heater coils.

NOTE: Do not direct air at the bi-metal discs on

the temperature limiter switches.

Coil fins are sharp and may cut hands. Wear heavy

protective gloves when cleaning coils.

Use only cleaning solutions that meet local codes.

Do not set unit on end to drain water from basepan,

or at any other time. Oil will drain from the com-

pressor sump, which could cause compressor failure.

FIGURE 21 — LOCATION OF

TWO-PIECE INDOOR FILTER

VENT DOOR

OUTDOOR

AIR FILTER

FIGURE 22 — LOCATION OF OUTDOOR AIR

VENT FILTER

52C,P

SERIES

DRAIN VALVE

FIGURE 24 — VACUUMING EVAPORATOR

COIL

FIGURE 25 — CLEANING COILS

FIGURE 23 — PTAC EXTERIOR SURFACES

FIGURE 26 — BASEPAN SECTION

COMPRESSOR

A cutaway view of the rotary compressor with key

components labeled is shown in Figure 27. The motor

stator is rigidly attached to the compressor shell. The

rotor is pressed onto the eccentric shaft, which is sup-

ported by 2 bearings. Both the discharge valve and dis-

charge muffler are attached to the motor bearing. The

pump bearing provides a thrust surface for the shaft

and the rolling piston. Compressed gas is separated

from the suction gas by the vane. Discharge gas pres-

sure and the vane spring keep the vane in contact with

the rolling piston.

DISCHARGE MUFFLER

DISCHARGE VALVE

CYLINDER

PISTON

SUCTION MUFFLER/

ACCUMULATOR

SUCTION INLET

DISCHARGE TUBE

VANE

OIL TUBE

SHELL

STATOR

ECCENTRIC SHAFT

ROTOR

MOTOR BEARING

PUMP BEARING

MOUNTING PLATE

FIGURE 27 — ROTARY COMPRESSOR COMPONENTS

52C,P

SERIES

The rotary compression process (Figure 28), starts at

top dead center as shown in (1). Suction gas flows

through the suction inlet and into the cylinder area.

As the shaft rotates through 90 degrees, the rolling

piston moves to position A as shown in (2). The suction

volume is now the area defined by point A and the tip

of the vane. Gas in the remaining volume has been

compressed above suction pressure. After another

90 degrees of shaft rotation, the rolling piston has

moved to position B as shown in (3). Both the com-

pressed gas and suction gas volumes are now equal.

Another 90 degrees of shaft rotation is shown in (4).

Compressed gas has reached a pressure sufficient to

open the discharge valve, and flows from the cylinder

into the compressor shell. After another 90 degrees of

shaft rotation, the entire process begins again. Contin-

uous suction and discharge allows for a smooth com-

pression process.

The rolling piston is not in actual contact with the cyl-

inder wall, vane, or bearing faces. Hydrodynamic seal-

ing prevents leakage from the compressed gas volume

to the suction volume via these paths. Precise control

of machining tolerances, surfaces, finishes, and assem-

bly clearances is critical to achieve high efficiency per-

formance. In addition, the line contact between the

vane tip and the rolling piston requires careful selec-

tion and control of materials to provide wear resis-

tance and reliable long-term operation.

COMPRESSOR TROUBLESHOOTING

Refer to Figure 29 for a basic compressor troubleshoot-

ing chart.

BASIC HERMETIC COMPRESSOR

ELECTRICAL MEASUREMENTS

There are 2 basic electrical tests for hermetic compres-

sors that will determine the electrical state of the

motor. The first test requires checking the electrical

resistance of each of the electrical motor windings. The

second test requires checking the electrical resistance

of each of the electrical motor windings to ground.

These tests may be accomplished by performing the

following steps:

1. DISCONNECT ALL POWER TO THE UNIT.

2. Remove the unit chassis from the sleeve as

detailed in the UNIT DISASSEMBLY section.

3. Open the control box as detailed in the UNIT

DISASSEMBLY section, then locate, label, and

remove the 3 compressor wires from the following

locations: the RUN wire (BLACK) from the capac-

itor, the START wire (BLUE) from the capacitor.

The third wire, COMMON wire (YELLOW) may

be connected to one of the following locations: for

PC units the wire is on the indoor thermostat,

for CE, PE Remote Control Units the wire is

on the RC Control Board, for all other CE, PE

Units the wire is located on the rotary selector

switch. For ALL CQ, PQ Units the wire is on the

outdoor frost thermostat.

4. Perform a shorted/open windings test to measure

the resistance between the windings of the com-

pressor motor. Use a volt-ohmmeter set to the

lowest ohm reading level then read and record the

resistance between the RUN and START, START

and COMMON, and RUN and COMMON wires.

See Figure 30. The typical resistance readings will

be about 4, 3, and 1 ohms respectively. The

smaller values should add to equal the larger

value. If this is not true then the compressor is

likely shorted winding to winding.

NOTE: The rotary compressor has the compressor

overload located under the terminal cover. If the over-

load is open it can show ohm readings that are infinite.

The unit should be off for at least an hour to give this

overload time to reset if it is open.

For compressors that are known to be dam-

aged: Remove refrigerant prior to disconnecting

compressor wires. Damaged hermetic compressor

terminals may become loose and eject from the com-

pressor. Wear safety glasses and keep your face

away from the area above the terminals when

removing compressor wires.

FIGURE 28 — ROTARY COMPRESSOR

COMPRESSION PROCESS

FIGURE 29 — BASIC COMPRESSOR TROUBLESHOOTING GUIDE

5. Next, perform a grounded windings test to test

the resistance individually of each wire to the

shell of the compressor. The paint on the compres-

sor can prevent good contact between the probe

and the metal. The paint should be removed from

a small section of the shell of the compressor to

ensure good contact by the meter probe. The volt-

ohmmeter should be set to at least the 100X ohm

level. The measured resistance between each wire

and ground should be infinite or O.L. on the

readout. If there is measurable resistance one of

the windings is likely shorted to ground. See

Figure 31.

6. A compressor that has a winding to winding short

or a winding to compressor shell short is electri-

cally failed and needs to be replaced. See the

Compressor Replacement section for details.

COMPRESSOR REPLACEMENT

Before working on the compressor, read the instruc-

tions thoroughly and gather the necessary tools for the

job. Review all safety information on unit and in liter-

ature. Always turn off all power to unit to avoid the

possibility of electrical shock.

POSSIBLE CAUSE

SYMPTOM

Compressor

Starts and

Runs But

Cycles On the

Overload

Compressor

Starts After

Cycling the

Overload

Several Times

Compressor

Will Not

Start. It Hums

and Cycles On

the Overload

Compressor

Will Not Start

and Makes No

Noise

Compressor

Cycles Off

(Not On

Overload)

COILS/FILTERS DIRTY OR PLUGGED X

AIR OR NONCONDENSABLE GASES

IN SYSTEM XX

SYSTEM REFRIGERANT OVERCHARGED X X

DISCHARGE LINE RESTRICTED XX

CAPILLARY TUBE OR STRAINER

RESTRICTED OR PLUGGED XX X

FAN BLADE OR MOTOR DEFECTIVE X X

FAN BLADE OR BLOWER WHEEL STUCK X X

SYSTEM REFRIGERANT UNDERCHARGED X X

EVAPORATOR AIRFLOW RECIRCULATION X

UNIT OVERSIZED FOR APPLICATION X

COMPRESSOR REQUIRES START ASSIST XX

NO POWER TO UNIT X

LOW VOLTAGE TO UNIT XX X X

OVERLOAD PROTECTOR OPEN X

OVERLOAD PROTECTOR INCORRECT

OR DEFECTIVE XXX

CAPACITOR INCORRECT OR DEFECTIVE XX X X

THERMOSTAT CONTACTS ARE OPEN X

THERMOSTAT IS SET TOO HIGH OR LOW X

SELECTOR SWITCH IS OPEN

OR DEFECTIVE X

WIRING IS INCORRECT OR DEFECTIVE XXXX

SYSTEM PRESSURES NOT EQUALIZED XX X

COMPRESSOR MOTOR OR

MECHANISM DEFECTIVE XX X XX

COMPRESSOR GROUNDED X

Consider the following safety issues before

beginning:

• New and unfamiliar tasks should be performed

under the supervision of an experienced service

technician.

• Personal protective equipment, such as work gloves

and safety glasses, should be worn.

• The floor around the work area should be clean and

free of debris.

• Make sure tools are the correct tools for the job and

that they are working properly and in good condition.

• Never replace a blown fuse without correcting the

cause of the original failure. If thermally operated

circuit breakers or overloads are tripping, make

sure the trip is not due to excessively high tempera-

tures or loose connections.

• When brazing suction and discharge lines, cool the

lines with a damp, clean cloth to prevent injury.

• Oil may be present in the compressor accumulator

and interconnecting tubing. Use caution when

removing tubing.

52C,P

SERIES

■ TOOLS NEEDED — The following list includes the

recommended tools and devices for removing and

replacing the compressor.

■ REMOVING THE COMPRESSOR — Follow the

steps below to remove the compressor:

1. Disconnect all power to unit.

2. Remove unit from wall sleeve as detailed in the

UNIT DISASSEMBLY section. The unit weighs

up to 150 pounds. Seek assistance or use a lifting

device when removing unit from wall sleeve.

3. If the unit is a heat pump: Disconnect the wire

plug on the reversing valve solenoid and carefully

remove the outdoor thermostat capillary from the

outdoor coil. See Figure 32.

4. Attach the piercing valve to the suction side pro-

cess tube below the crimps. Attach Carrier

TOTALTEST® kit (Part No. TT1-001), to the

piercing valve to verify acidity of the system. After

verifying the system acidity, remove the refriger-

ant using a certified refrigerant recovery system.

5. When all the refrigerant has been recovered,

remove the terminal cover from the compressor

with a nut driver. Disconnect the 3 wires from the

compressor and label the location of each. Once

the wires are labeled, replace the terminal cover

to protect the compressor terminals.

6. Remove the air system components by following

the procedure detailed in the ACCESSING UNIT

COMPONENTS section.

7. Remove the piercing valve and cut the crimped

portion of both process tubes off with a small tub-

ing cutter. Braze an access valve on each process

tube. Using a torch, disconnect the suction and

discharge tubes from the compressor connections.

8. Remove the compressor mounting bolts, and

remove the compressor.

9. For all units: Remove and replace the strainer

and capillary tubes from the system. See Figure 32

for strainer and capillary tube location.

10. For Heat/Cool Units: Use an in-line filter drier

(P/N P504-80845). The filter drier can be installed

in any location in suction line. See Figure 33A for

general installation location.

For Heat Pump Units: Use an in-line filter drier

(P/N P504-80845) and install between the

reversing valve and the compressor accumu-

lator. There are several suction tube configura-

tions and the in-line filter drier will be field piped

and brazed into the suction tube for your unit. See

Figure 33B for a general installation location.

11. Remove the grommets from the existing compres-

sor and install them onto the new compressor.

For compressors that are known to be dam-

aged: Remove refrigerant prior to disconnecting

compressor wires. Damaged hermetic compressor

terminals may become loose and eject from the com-

pressor. Wear safety glasses and keep your face

away from the area above the terminals when

removing compressor wires.

1/2-in. and 3/8-in. Tube Benders

1/2-in. Nut Driver

5/16-in. Nut Driver

Flat Head Screwdriver

Piercing Valve

2 Parker Access Valves (Part No. AVUSE-5)

Pinch Off Tool

Filter Drier — All Units (Part No. P504-80845)

Carrier TOTALTEST Kit (Part No. TT1-001)

Totalclaim System

Charging Cylinder or an Electronic Scale

Refrigerant-22

Tubing Cutter

Torch

Nitrogen Cylinder with Regulator

Strainers

Capillary Tubes

The compressor may still be hot from the brazing

process.

IMPORTANT: Any time the compressor is

replaced, the strainer and capillary tubes must

be removed and replaced also.

FIGURE 30 — SHORTED/OPEN WINDINGS TEST

FIGURE 31 — GROUNDED WINDINGS TEST

12. Install the new compressor and the new capillary

assembly (the correct capillary and strainer may

be obtained from Carrier RCD), into the unit.

13. Leak check the unit with 150 psi of nitrogen

pressure.

14. For 52C,P units, the system should be evacuated

from the high side to the low side to a minimum

of 200 microns of mercury. This evacuation

removes residual moisture from the system prior

to charging.

15. For Heat Pump Units: Recharge unit to the

nameplate refrigerant charge using a charging

cylinder.

16. Pinch off each access valve on the process tubes,

in 2 places, using a pinch off tool such as Imperial

tool #105-FF or Robinair Tool #12294. Release any

refrigerant pressure trapped in the access valve

by depressing the valve core, then confirm that no

R-22 is leaking past the pinch off tool location. Cut

the access valve stem of the process tube above

the top crimp and braze the top of each process

tube to ensure the system is sealed, (leave the

pinch off tool in place until after the brazing pro-

cess is complete).

17. Reassemble the unit by reversing steps 1-9.

18. Connect the compressor wires and energize the

unit to verify operation.

■ REFRIGERANT CHARGING — Every mechanical

refrigeration system that is opened for servicing must

be accurately charged before it is returned to service.

Run the compressor ONLY after charging the system

with refrigerant.

It is important to remember that recovered and/or

recycled refrigerant may only be recharged into the

system from which it was initially recovered, or

another one owned by the same customer. Charge

level is important. Charge units only as recommended

by manufacturer.

IMPORTANT: The compressor should never be

operated without refrigerant!

IN-LINE

FILTER DRIER

COMPRESSOR

IN-LINE

FILTER DRIER

COMPRESSOR

FIGURE 32 — STRAINER AND

CAPILLARY TUBE LOCATION

FIGURE 33A — IN-LINE FILTER DRIER —

GENERAL INSTALLATION LOCATION

FOR HEAT/COOL UNIT

FIGURE 33B — IN-LINE FILTER DRIER —

GENERAL INSTALLATION LOCATION

FOR HEAT PUMP UNIT

52C,P

SERIES

HEATERS

The heater in 52C,P units is located directly behind

the evaporator coil. The heater assembly includes the

heater (2.3 kW, 3.4 kW or 5 kW), a primary limit

switch, and a secondary limit switch. See Figure 34.

The primary and secondary limit switches are safety

switches that regulate heater operation. The primary

limit switch disables current to the heater when the

temperature exceeds the setting on the switch.

For example, a 3.4 kW heater may have a primary

limit switch setting of 150 F. If the temperature at the

switch exceeds 150 F, the primary limit switch will

electrically open and shut off power to the heater.

Once the temperature drops below 110 F, the primary

limit switch will automatically reset.

The secondary limit switch works in the same manner

as the primary limit switch, except it is a one time

switch and has a slightly higher temperature setting.

Once this switch is thermally opened, it must be

replaced. Together the primary and secondary

switches help maintain safe temperature limits for

unit operation.

COMMON CAUSES OF

HEATER FAILURE

Heater failure may result from broken heater coils,

primary limit switch failure, or an open secondary

limit switch. These conditions are generally caused by

low or no airflow.

HEATER REMOVAL

Before working on the heater, read the instructions

thoroughly and gather the necessary tools for the job.

Review all safety information on the unit and in the

product literature.

The manufacturer reserves the right to discontinue, or

change at any time, specifications or designs without

notice and without incurring obligations.

Before performing any cleaning, servicing, or main-

tenance to the unit, Disconnect All Power to avoid

the possibility of electric shock and personal injury.

Consider the following safety issues:

• Prior to performing any service or maintenance on

electrical equipment you must Disconnect All

Power.

• New and unfamiliar tasks should be performed

under the supervision of an experienced service

technician.

• Personal protective equipment, such as safety

glasses and work gloves, should be worn.

• The floor around the work area should be clean and

free of debris.

• Make sure tools are the correct tools for the job,

and that they are working properly and in good

condition.

FIGURE 34 — LIMIT SWITCH LOCATION

■ TOOLS NEEDED — The following list includes rec-

ommended tools and devices for working on the heater

section of 52C,P units.

Perform the following steps to remove the Heater

Assembly.

1. DISCONNECT ALL POWER TO UNIT.

2. Remove heater by following instructions in

ACCESSING UNIT COMPONENTS section.

After the heater is removed, examine the heater

as follows to determine if it is operational:

Perform a visual inspection. The heater coil should be

free of breaks. If there are any breaks in the coil,

replacement of the heater assembly is necessary. See

Figure 35.

Coil resistance must also be checked to verify the

heater is operating correctly. The resistance of the

heater coils must meet approximate levels for the

heater to perform at its optimum efficiency. See

Figure 36 for approximate resistance for heaters at

75 F. Before checking the heater coil resistance, be

sure all power to unit is off.

To check resistance, set the volt-ohmmeter selector

switch to the lowest ohms value. Next connect the volt-

ohmmeter leads to each side of the heater coil at the

studs that hold the limit switches in place. Incorrect

readings can be obtained if the wires are not removed

from the limit switches on the heater assembly. If the

resistive reading is infinite or zero, the heater is failed

and replacement is necessary. Reinstall the heater

assembly.

FIGURE 36 — ACCEPTABLE HEATER

RESISTANCE VALUES

Phillips Head Screw Driver

Needle Nose Pliers

Volt-ohmmeter

Nut Driver 5/16-in.

HEATER SIZE WATTS VOLTS ACCEPTABLE RESISTANCE

(Ohms)

2.3 kW 2300 230 20-23

2300 265 28-31

3.4 kW 3400 230 13-16

3400 265 19-21

5.0 kW 5000 230 9-11

5000 265 13-15

FIGURE 35 — HEATER COIL (Removed)

52C,P

SERIES

OPERATING CONTROLS

UNIT-MOUNTED CONTROLS

The controls and components used in the 52C,P cool-

ing only or heat/cool units are as follows: the selec-

tor switch, the indoor thermostat, the dual capacitor,

the temperature limiter, the vent lever, and the fan

cycle switch. See Figure 37.

The selector switch is used to determine the mode of

operation: heat, cool, fan, or off. The indoor thermostat

controls the room ambient temperature and cycles the

heater or the compressor based on the selector switch

setting. The dual capacitor aids in the start-up of the

compressor and the fan motor. The temperature limiter

is integrated into the control box top cover located

under front panel. It is a mechanical device that

restricts the amount of rotation of the thermostat. The

temperature limiter device may be adjusted by moving

the plastic temperature selector tabs to another temper-

ature location on the control box. The vent lever is

located on the front left side of the chassis. It is a slide

mechanism that opens and closes the vent door. The

vent control may be accessed by removing the front

panel of the unit. The fan cycle switch is used to provide

2 options of fan control. The first option, CON, causes

the fan to run continuously. The second option, CYC,

causes the fan to cycle on with the compressor or elec-

tric heater and off when the thermostat is satisfied.

The 52C,P heat pump unit contains all the compo-

nents of the heat/cool and cooling only unit, and the

following additional ones: the outdoor frost thermostat

and the reversing valve. The outdoor frost thermostat

prevents operation of the unit in the heat pump mode

when the outdoor coil temperature drops below 20 F,

or at about 35 F outdoor ambient temperature. The

unit automatically engages the electric heat strip and

disables the compressor under these conditions.

The outdoor frost thermostat has a manual override to

place the unit in electric heat mode operation only. The

override switch is located behind the front panel on

the front side of the unit control box door.

The reversing valve allows for operation in reverse cycle

heat pump mode. The valve is located in the piping sys-

tem and is controlled by the reversing valve solenoid

coil. The coil is energized only during the heating mode.

IMPORTANT: Placing the override switch to elec-

tric heat mode operation will disable the compres-

sor for ALL heating or cooling operations (for all

units except RC units). Placing the override switch

to electric heat mode operation on RC units will

only disable the compressor in heating mode.

TEMPERATURE

LIMITER

FAN CYCLE

SWITCH

OUTDOOR FROST

THERMOSTAT

(HEAT PUMP

UNITS ONLY)

90 60

CON

CYC

SELECT0R

SWITCH

INDOOR

THERMOSTAT

FIGURE 37 — 52C,P OPERATING CONTROLS

WALL-MOUNTED THERMOSTAT

CONTROLS

For 52C,P wall thermostat control (RC, RP)

units, all controls are located on the wall-mounted

thermostat except the vent lever and outdoor thermo-

stat. Remote control is a factory or field-installed

option. There are 3 styles of thermostats qualified for

use with 52C,P series Remote Control units. See Fig-

ures 38-40. On remote control units, the fan cycle func-

tion is located on the wall thermostat. The rocker

switch on the control box door is used to set fan speed

to high or low. Factory default is low speed.

See Figures 41-43 for thermostat wiring.

A field conversion kit is available to convert an AA

model (standard unit-mounted controls) to an RC

model (wall-mounted controls).

REMOTE THERMOSTAT

TROUBLESHOOTING

Thermostat display is blank:

Check to make sure there is 24 VAC to the thermostat

(measure across terminals R and C at the thermostat).

If there is 24 VAC at the thermostat, check connec-

tions at the thermostat terminal block. If connections

are good and there is 24 VAC with no display, the ther-

mostat should be replaced.

Thermostat display is working but unit is not

heating or cooling:

At the RC terminal block on the unit, measure the con-

trol inputs coming from the thermostat. (Place one of

the meter leads on C and use the other to check the

voltage at each of the terminals.)

*24 VAC supplied if thermostat is in 2nd stage heating demand (large

difference between room temperature and setpoint).

NOTE: For heat pump units, the Outdoor Frost Thermostat (OFT) will

determine, based on outdoor temperature, whether to bring on the com-

pressor or electric heat in the Heating mode.

FIGURE 42 — THERMOSTAT TROUBLESHOOTING

If the inputs are not correct, then the thermostat is not

making a call for the mode requested. This could be

because the thermostat is in a unit protection mode,

not set up properly, miswired, has a broken wire, or it

may have failed.

IMPORTANT: No conversion kit is available to

convert from an RC model back to an AA model.

MODE

TERMINAL

METER READINGS (VAC)

RGY W O (For

HP Only)

Fan Only 24 24 0 0 0

Cooling 24 24 24 0 24

Heating

Heat Pump Unit 24 24 24 0/24* 0

Heat/Cool Unit 24 24 0 24 0

FIGURE 38 — NON-PROGRAMMABLE

THERMOSTAT

FIGURE 39 — MANUAL THERMOSTAT

FIGURE 40 — PROGRAMMABLE THERMOSTAT

TYPICAL

WALL

THERMOSTAT

TERMINAL

BLOCK

FIGURE 41 — WIRING CONNECTIONS

TERMINAL DESIGNATION

R24 VAC

GFan

YCompressor

WElectric Heat

OReversing Valve

CCommon

NOTES:

1. Use terminal “O” for heat pump con-

nection only.

2. See table at left for terminal descriptions.

3. Common wire “C” is typically used only

for digital thermostats.

4. Power stealing is NOT allowed. There

must always be a hard common connec-

tion between unit and digital thermostat.

52C,P

SERIES

T’STAT

MASTER

PTAC

UNIT 1

UNIT 2

UNIT 3

FIGURE 43 — TYPICAL WIRING FOR MULTIPLE 52C PTAC UNITS CONNECTED

TO ONE WALL THERMOSTAT

All units must be connected to same ground source.

To accomplish this, be sure to connect all units back

to the same breaker box.

NOTES:

1. Do not daisy chain R (24 VAC).

2. Maximum of 4 PTAC units can be connected

to one single wall thermostat.

DESCRIPTION OF SELECTOR SWITCH

SETTINGS (Figure 44)

■ OFF MODE — The OFF position terminates unit

operation.

■ FAN ONLY MODE — Use fan only position for air

circulation without heating or cooling. Fan runs at

high speed.

■ HIGH HEAT OR HIGH COOL MODE — Position

selector and temperature control knobs to desired com-

fort level. This function provides maximum heating or

cooling, and is recommended to raise or lower the room

temperature quickly.

■ LOW HEAT OR LOW COOL MODE — Position

selector and temperature control knobs to desired com-

fort level. This function provides minimum heating

or cooling with maximum dehumidification during

cooling. This setting also allows for very quiet fan

operation.

■ FINDING TEMPERATURE SETTING FOR COM-

FORT LEVEL — Set temperature knob in the middle.

Select High Heat, Low Heat or Cool position and allow

unit to run for 15 to 30 minutes. If room is not comfort-

able, turn knob setting slowly to change setting. When

room is comfortable, keep control knob at that

position.

NON-USER ADJUSTABLE CONTROLS

■ OUTSIDE OR VENT AIR — Slide the vent lever to

the fully open position for outside air or fully closed

position for vented air.

■ FAN CYCLE — The fan cycle switch allows the fan

to operate in 2 modes:

CON — Fan runs continuously, circulating air even

when the temperature setting has been satisfied. This

helps to maintain the room temperature closer to the

thermostat setting.

CYC —Fan cycles on and off with the compressor

during heating or cooling. Fan stops when the temper-

ature setting is satisfied. This results in longer unit

off-time and slightly larger variations in room temper-

ature and humidity.

■ OUTDOOR THERMOSTAT (52CQ, PQ Units Only)

— The outdoor thermostat has 2 operating modes. The

heat pump mode (selector screw set fully clockwise),

allows the unit to operate normally in the reverse cycle

mode. The electric heat mode (selector screw set fully

counterclockwise), disables all compressor operating

modes, both heating and cooling for units with

mounted controls. For wall thermostat controlled mod-

els the compressor is only disabled in heating and still

allowed to run in cooling.

TYPICAL 52C UNIT CONTROLS TYPICAL 52C UNIT WITH

WALL THERMOSTAT CONTROLS (Blank Plate)

FIGURE 44 — TYPICAL CONTROL PANEL (52C Unit Shown)

52C,P

SERIES

SEQUENCE OF OPERATION

■ HEAT/COOL UNITS (Figure 45)

Fan Mode — With the selector switch set to FAN con-

tacts L1 to HI and FCS1 to LS are made.

Cooling (Low) — With the selector switch set to low

speed cooling contacts FCS2 to LO, COMP to FCS1,

and COMP to IT3 are made.

Cooling (High) — With the selector switch set to high

speed cool contacts FCS2 to HI, COMP to FCS1, and

COMP to IT3 are made.

Heating (Low) — With the selector switch set to low

speed heat contacts FCS2 to LO, IT1 to LS, L2 to HTR,

and FCS1 to LS are made.

Heating (High) — With the selector switch set to high

speed heat contacts FCS2 to HI, IT1 to LS, L2 to HTR,

and FCS1 to LS are made.

FIGURE 45 — SELECTOR SWITCH CONTACTS,

ALL 52CE, PE ELECTRIC HEAT/COOL UNITS

■ COOLING ONLY UNITS (Figure 46)

Fan Mode (Low) — With the selector switch set to FAN

contact L1 to LO is made.

Fan Mode (High) — With the selector switch set to

FAN contact L1 to HI is made.

Cooling (Low) — With the selector switch set to low

speed cooling contacts FCS to LO and L1 to IT3 are

made.

Cooling (High) — With the selector switch set to high

speed cool contacts FCS to HI, L1 to IT3 are made.

FIGURE 46 — SELECTOR SWITCH CONTACTS,

ALL 52CE, PE COOLING ONLY UNITS

■ HEAT PUMP UNITS (Figure 47)

Fan Mode — With the selector switch set to fan contact

L1 to HI is made.

Cooling (Low) — With the selector switch set to low

cool contacts L1 to IT3 and FCS to LO are made.

Cooling (High) — With the selector switch set to high

cool, contacts L1 to IT3 and FCS to HI are made.

Heating (Low) — With the selector switch set to low

heat contacts L1 to IT1, FCS to LO and L2 to HTR are

made.

Heating (High) — With the selector switch set to high

heat contacts L1 to IT1, FCS to HI, and L2 to HTR are

made.

Defrost Cycle — When heat pump unit is operating in

reverse cycle, the outdoor coil may begin to frost. As

frost accumulates on the outdoor coil the unit may

switch into defrost mode. The defrost mode is acti-

vated when the outdoor frost thermostat sensor

detects a temperature below 20 F on the coil. At this

point, the thermostat deenergizes the compressor and

activates the electric heat. The unit will remain in

electric heat mode until the outdoor thermostat senses

35 F coil temperature. The defrost mode is a passive

operation and may take some time before the coil

defrosts.

FIGURE 47 — SELECTOR SWITCH CONTACT,

ALL 52CQ, PQ HEAT PUMP UNITS

COMPONENT OPERATION AND

TROUBLESHOOTING

■ TOOLS NEEDED

SWITCH

POSITION CONTACTS MADE

OFF NONE

FAN L1 TO HI, FCS1 TO LS

LO HEAT FCS2 TO LO, IT1 TO LS, L2 TO HTR, FCS1 TO LS

HI HEAT FCS2 TO HI, IT1 TO LS, L2 TO HTR, FCS1 TO LS

LO COOL FCS2 TO LO, COMP TO FCS1, COMP TO IT3

HI COOL FCS2 TO HI, COMP TO FCS1, COMP TO IT3

SWITCH

POSITION CONTACTS MADE

OFF NONE

FAN L O L1 TO LO

FAN HI L1 TO HI

LO COOL L1 TO IT3, FCS TO LO

HI COOL L1 TO IT3, FCS TO HI

SWITCH

POSITION CONTACTS MADE

OFF NONE

FAN L1 TO HI

LO HEAT L1 TO IT1, FCS TO LO, L2 TO HTR

HI HEAT L1 TO IT1, FCS TO HI, L2 TO HTR

LO COOL L1 TO IT3, FCS TO LO

HI COOL L1 TO IT3, FCS TO HI

Volt-Ohmmeter

Flat and Phillips Screw Drivers

5/16-in. Nut Driver

Side Cutting Pliers

Before cleaning, servicing, performing maintenance

or removing the chassis from the wall sleeve, discon-

nect all power to the unit to avoid the possibility of

electrical shock and personal injury. Only trained

and qualified service personnel should perform

installation and service procedures on these units.

Untrained personnel may perform basic mainte-

nance tasks such as cleaning and replacing filters.

Refer to UNIT DISASSEMBLY section of this man-

ual for proper procedures to disconnect power to

52C,P units.

The Manufacturer reserves the right to discontinue, or

change at any time, specifications or designs without

notice and without incurring obligations.

■ INDOOR THERMOSTAT (Heat/Cool and Cool Only

Units) (Figure 48) — The thermostat maintains the

selected temperature by cycling the compressor on and

off during cooling operation and the electric heater

during heating operation. The thermostat DOES

NOT switch from heating to cooling, or cooling

to heating. If the switch is in the CYCLE position,

then the fan will be cycled off when the thermostat

satisfies.

To verify the operation of the thermostat switch, a con-

tinuity test may be performed as follows:

1. Turn off unit power as described in UNIT

DISASSEMBLY section.

2. Remove wire leads from thermostat. Note their

locations to ease re-assembly.

3. Place one of the leads of the continuity tester on

the terminal marked 2, and the other lead on

either the terminal marked 1 or the terminal

marked 3.

4. Adjust the thermostat up or down to verify the

contacts of the switch open and close. When veri-

fying continuity of a closed switch, the ohm read-

ing should be 0 ohms. An open switch will show

OL on the meter.

5. When testing is complete, reconnect the leads.

■ INDOOR THERMOSTAT (Heat Pump Units)

(Figure 49) — The heat pump indoor thermostat uses a

two-stage switch for the heating mode. The first stage

engages the compressor and reversing valve, and the

unit operates in normal heat pump mode. The indoor

thermostat maintains the selected temperature by

cycling the compressor on and off in cooling mode. In

the heating mode, the indoor thermostat will cycle the

compressor or the heater, depending on the difference

between the actual room temperature and the thermo-

stat temperature setting.

When the room temperature is more than 4 F cooler

than the indoor thermostat setting, the second heating

stage of the indoor thermostat engages the electric

heat strip. This design feature allows the user to rap-

idly warm the room with the electric heat strip by

turning the thermostat to its highest setting. When

room temperatures approach the desired temperature,

the user may adjust the thermostat to a personal

comfort setting, which allows for normal heat pump

operation.

NOTE: For outdoor coil temperatures below approxi-

mately 20 F, the outdoor frost thermostat prevents

heat pump mode operation and immediately engages

the electric heat strip upon a call for heating. The elec-

tric heat strip is NEVER energized at the same time

as the compressor.

To verify operation of the heat pump indoor thermo-

stat switch, a continuity test may be performed as

follows:

1. Turn off unit power as described in UNIT

DISASSEMBLY section.

2. Remove wire leads from thermostat. Note their

locations to ease re-assembly.

3. To test stage A, place one lead of the continuity

tester on the terminal marked 2, and the other

lead on either the terminal marked 1 or the termi-

nal marked 3.

4. Adjust the thermostat up or down to verify the

contacts of the switch open and close. When veri-

fying continuity of the closed switch, the reading

on the meter should be 0 ohms. An open switch

will show OL on the meter.

5. To test stage B contacts, place one lead of the con-

tinuity tester on contact 5 and the other lead on

either contact 4 or contact 6.

6. Adjust the thermostat up or down to verify the

contacts of the switch open and close as in Step 4.

7. When testing is complete, reconnect the leads.

Consider the following safety issues:

• Prior to performing any service or maintenance on

electrical equipment you must Disconnect All

Power.

• New and unfamiliar tasks should be performed

under the supervision of an experienced service

technician.

• Personal protective equipment, such as safety

glasses and work gloves, should be worn.

• The floor around the work area should be clean and

free of debris.

• Make sure tools are the correct tools for job, and

that they are working properly and in good

condition.

• The 52C,P unit may weigh up to 150 pounds. Use a

lifting device or ask for assistance if the unit must

be moved.

FIGURE 48 — INDOOR THERMOSTAT (IT)

CONTACTS, ALL 52CE, PE MODELS

LEGEND (Figures 48-50)

COMP — Compressor

HTR — Heater

IT — Indoor Thermostat

OFT — Outdoor Frost Thermostat

OL — Overload

PLS — Primary Limit Switch

SLS — Secondary Limit Switch

52C,P

SERIES

■ OUTDOOR FROST THERMOSTAT (Heat Pump

Units) (Figure 50A and 50B) — The Outdoor Frost

Thermostat (OFT) is a thermostat that uses a single-

pole switch with a manual override selector. The ther-

mostat switches between electric heat and compressor

operation when the temperature of the outdoor coil

falls below 20 F or rises above 35 F. Switching the

override selector to electric heat disables the reverse

cycle operation of the thermostat and is manually

switched to electric heat operation.

To verify the OFT is operational, a continuity test may

be performed as follows:

1. Turn off unit power as described in UNIT

DISASSEMBLY section.

2. Remove the leads from the OFT. Note their loca-

tions to ease re-assembly.

3. Connect the continuity tester to the switch termi-

nals marked 1 and 2.

4. Rotate the override switch to the electric heat set-

ting and verify that there is continuity between

terminals 1 and 2.

5. To check the other contacts, move the lead on ter-

minal 1 to terminal 3. Rotate the override switch

to the heat pump setting. There should now be

continuity between terminals 2 and 3.

6. Once the test is complete, reconnect the leads.

■ CAPACITOR — The 52C,P units use a dual

capacitor. One part of the capacitor is used with the

fan motor. The other part of the capacitor is used by

the compressor.

Run circuits on single-phase compressor motors use

capacitors which dramatically affect the motor opera-

tion. Run capacitors are connected to the motor circuit

at all times.

To evaluate the capacitor, perform a visual check first.

A shorted capacitor may give a visual indication of its

failure. For example, the pop-out hole at the top of a

start capacitor may bulge or blow out. A run capacitor

may bulge or leak. In these instances, the capacitor

must be replaced with one recommended by the manu-

facturer. If there are no visual signs of capacitor fail-

ure, testing of the capacitor resistance may be done

with a volt-ohmmeter as detailed below:

1. Turn off unit power as described in UNIT

DISASSEMBLY section but do not unplug the

service cord; it will supply ground connection for

the unit chassis. Check to ensure power is off

and LOCKED OUT.

2. Connect one lead of a 20,000 ohm, 2-watt resistor

to the center group of terminals on the dual capac-

itor. Attach the other lead from the resistor to an

unpainted metal section of the unit chassis. This

allows that section of the dual capacitor to dis-

charge. Repeat this process between the other

group of terminals.

3. Locate and disconnect the wires from the start

and/or run capacitor to isolate them from the

remainder of the circuit. Refer to the unit wiring

diagram if you need assistance locating wires.

4. Perform capacitor test. Set up the volt-ohmmeter

to measure resistance by connecting terminals C

to FAN and C to HERM on the meter. See

Figure 51.

IMPORTANT: Placing the override switch to elec-

tric heat mode operation will disable the compres-

sor for ALL heating or cooling operations (for all

units except RC units). Placing the override switch

to electric heat mode operation on RC units will

only disable the compressor in heating mode.

Capacitors are capable of holding charge similar to a

battery and may cause an electrical shock.

FIGURE 50A — OUTDOOR FROST THERMOSTAT

(OFT) CONTACTS, ALL 52CQ, PQ UNITS WITH

MOUNTED CONTROLS

FIGURE 50B — OUTDOOR FROST THERMOSTAT

(OFT) CONTACTS, ALL 52CQ, PQ UNITS WITH

WALL THERMOSTAT CONTROL

ORN

BLK

BLU

GRY

BRN

FIGURE 49 — INDOOR THERMOSTAT (IT)

CONTACTS, ALL 52CQ, PQ MODELS

5. The reading on the meter should first indicate

zero, or a low resistance, then slowly rise toward

infinity or some high value or measurable resis-

tance. This indicates the capacitor is most likely

good. If the reading goes to zero or a low resis-

tance and stays there, the capacitor is likely

shorted and needs replacement. If the reading

immediately indicates infinity, the capacitor is

likely open and must be replaced.

6. Replace the capacitor if failed and rewire accord-

ing to the WIRING SCHEMATICS located in the

control box of the unit.

■ FAN CYCLE SWITCH — The fan cycle switch has

2 operating modes, continuous (CON) and cycle (CYC).

To verify the fan cycle switch is operational, a continu-

ity test may be performed as follows:

1. Turn off unit power as described in UNIT

DISASSEMBLY section.

2. Label and remove the leads connected to fan cycle

switch. See Figure 52.

3. Connect the volt-ohmmeter for 1X ohms and check

for continuity from terminal 2 to 1 then change

the switch position and check for continuity from

terminal 2 to 3.

4. Once test is complete, reconnect the leads.

ELECTRICAL COMPONENTS

REMOVAL AND REPLACEMENT

■ INDOOR THERMOSTAT — To remove the indoor

thermostat, perform the following steps:

1. Turn off unit power as described in UNIT

DISASSEMBLY section.

2. Remove front panel.

3. Remove thermostat knob to expose 2 Phillips head

mounting screws.

4. Open the control box as described in the UNIT

DISASSEMBLY section of this manual.

5. Carefully remove the thermostat bulb from the

clip by gently pressing it down and out of the clip.

6. Remove the leads from the indoor thermostat.

Note the wire locations to ease re-assembly.

7. Remove the 2 screws mounting the thermostat to

the control box. Route thermostat bulb and capil-

lary out of control box.

8. Remove thermostat.

9. Reverse Steps 1-8 to reinstall.

■ OUTDOOR FROST THERMOSTAT (Heat Pump

Units) — To remove the outdoor frost thermostat

(OFT), perform the following steps:

1. Turn off unit power as described in UNIT

DISASSEMBLY section.

2. Remove front panel.

3. Remove the 2 screws mounting the thermostat to

the bottom of the control box. See Figure 53.

FIGURE 51 — CAPACITOR TEST

TEMPERATURE

CONTROL

STANDOFF

PINS

FAN CYCLE

SWITCH

OUTDOOR FROST

THERMOSTAT

(HEAT PUMP

UNITS ONLY)

90 60

CON

CYC

SELECT0R

SWITCH

OFT

MOUNTING

SCREWS

FIGURE 53 — 52C,P OPERATING CONTROLS

FIGURE 52 — FAN CYCLE SWITCH (3 Terminal)

52C,P

SERIES

4. Remove the thermostat capillary from the outdoor

coil and clip any wire ties holding the capillary in

place.

5. Disconnect the wires and carefully remove the

thermostat and capillary from the unit, noting

location of wires for easy re-assembly.

6. Reverse Steps 1-5 to reinstall.

■ CAPACITOR — To remove the capacitor, perform

the following steps:

1. Turn off unit power as described in UNIT

DISASSEMBLY section.

2. Open the control box as detailed in the UNIT

DISASSEMBLY section of this manual.

3. Properly discharge the capacitor as described in

the Capacitor section under Component Opera-

tion and Troubleshooting.

4. Remove the leads to the capacitor. Note the wire

locations to ease re-assembly.

5. Remove the screw holding the capacitor.

6. Remove capacitor.

7. Reverse Steps 1-6 to reinstall.

■ FAN CYCLE SWITCH — The fan cycle switch is

located on the front of the control box. To remove the

fan cycle switch, perform the following steps:

1. Turn off unit power as described in UNIT

DISASSEMBLY section.

2. Open the control box as described in UNIT

DISASSEMBLY section of this manual.

3. Remove the 3 wires from the fan cycle switch. See

Figure 54 for location, noting location of wires for

re-assembly.

4. Push the snaps of the switch housing toward the

switch with a pair of pliers or small screwdriver.

Gently push the switch out of the housing.

5. Reverse Steps 1-4 to reinstall.

■ SELECTOR SWITCH — To remove the selector

switch from the unit, perform the following steps:

1. Turn off unit power as described in UNIT

DISASSEMBLY section.

2. Remove selector switch knob. See Figure 53.

3. Open control box as described in the UNIT

DISASSEMBLY section of this manual.

4. Remove all the wires to the selector switch. Label

wires to simplify re-assembly. See Figure 54.

5. Remove the 2 screws mounting the switch and

remove switch.

6. Reverse Steps 1-5 to reinstall.

PLAIN WIRE (L1)

TO ROTARY SWITCH

GROUND SCREW

FAN CYCLE

SWITCH

INDOOR

THERMOSTAT SELECTOR

SWITCH

CAPACITOR

OUTDOOR FROST

THERMOSTAT

RIBBED WIRE (L2)

TO CAPACITOR (C)

POWER CORD

FIGURE 54 — COMPONENT LOCATIONS

IN OPEN CONTROL BOX

FAN MOTOR

The fan motor is a permanent split capacitor (PSC)

type motor. This motor is common in air-conditioning

system applications. A PSC motor does not require the

use of a relay and always has a run capacitor con-

nected between the run and start windings of the

motor. See Figure 55.

The 52C,P series fan motor has a motor shaft extended

through both ends. It powers both the indoor and the

outdoor fans. It has permanently sealed bearings that

require no lubrication. There are many different fan

motor models, but they typically are 2-speed and in

2 voltage categories, 208/230 and 265 volts.

FAN MOTOR TROUBLESHOOTING

Refer to Figure 56 for a basic fan motor troubleshoot-

ing chart.

■ TOOLS NEEDED — The following list includes rec-

ommended tools and devices for working on the fan

motor of 52C,P units.

The Manufacturer reserves the right to discontinue, or

change at any time, specifications or designs without

notice and without incurring obligations.

BASIC FAN MOTOR ELECTRICAL TESTS

There are 2 basic electrical tests for PSC fan motors

that will determine the electrical state of the motor.

The first test requires checking the electrical resis-

tance between the motor windings. The second test

requires checking the electrical resistance between the

motor windings and ground. These tests may be

accomplished by performing the following steps:

1. DISCONNECT ALL POWER TO UNIT.

2. Open the control box as detailed in the UNIT

DISASSEMBLY section.

3. Label and disconnect the fan motor wires from

the selector switch and capacitor as shown in

Figure 54. Two-speed motors have 2 wires on the

capacitor and 2 wires on the push button switch.

4. Measure and record the resistance between the

black wire and each of the other wires. Make sure

the motor is cool before attempting to measure

resistance. The internal thermostat of the motor

may be electrically open and will not close until

the motor cools. See Figure 57 for typical motor

winding resistance measurements. The resistance

values in the table are approximate. Values that

are within 10% of those listed are acceptable. If

the motor in your model is not listed, find a motor

of similar horsepower and voltage on the chart

and compare it to the resistance measurements of

your motor.

5. Measure the resistance of each of the motor wires

to the motor casing. The resistance should be infi-

nite. Make sure the motor is cool before attempt-

ing to measure resistance. The internal

thermostat of the motor may be electrically open

and will not close until the motor cools. A motor

that has measurable resistance to ground is

shorted to ground and must be replaced.

Gloves

Safety Glasses

Regular and Phillips Head Screw Drivers

Small Adjustable Wrench

Channel Lock Pliers

Volt-ohmmeter

5/16-in. Nut Driver

Before cleaning, servicing, performing maintenance

or removing the chassis from the wall sleeve, discon-

nect all power to the unit to avoid the possibility of

electrical shock and personal injury. Only trained

and qualified service personnel should perform

installation and service procedures on these units.

Untrained personnel may perform basic mainte-

nance tasks such as cleaning and replacing filters.

Refer to UNIT DISASSEMBLY section of this man-

ual for proper procedures to disconnect power to

52C,P units.

Consider the following safety issues:

• Prior to performing any service or maintenance on

electrical equipment you must Disconnect All

Power.

• New and unfamiliar tasks should be performed

under the supervision of an experienced service

technician.

• Personal protective equipment, such as safety

glasses and work gloves, should be worn.

• The floor around the work area should be clean and

free of debris.

• Make sure tools are the correct tools for the job,

and that they are working properly and in good

condition.

• The 52C,P unit may weigh up to 150 pounds. Use a

lifting device or ask for assistance if the unit must

be moved.

FIGURE 55 — TWO-SPEED, PERMANENT

SPLIT CAPACITOR MOTOR (PSC)

52C,P

SERIES

FIGURE 56 — FAN MOTOR TROUBLESHOOTING CHART

TYPICAL 208/230 VOLT MOTORS

NOTE: Resistance values are approximate.

TYPICAL 265 VOLT MOTORS

NOTE: Resistance values are approximate.

FIGURE 57 — TYPICAL 52C,P FAN MOTORS

POSSIBLE CAUSE

SYMPTOM

Motor Hums

But Does

Not Start

Makes No Noise

and Does Not

Start

Starts But

Stops After

Short Time

Starts

But Runs

Slow

Runs On

One Speed,

Not On Others

DEFECTIVE BEARING XXX

CAPACITOR DEFECTIVE XX

SWITCH DEFECTIVE XX

LOW LINE VOLTAGE XXX

SHORTED MOTOR WINDING XX X

NO POWER TO UNIT X

INTERNAL THERMOSTAT OPEN X

MISWIRED XXX X

FAN STUCK X

BROKEN MOTOR WIRE XXX X

MOTOR WINDING GROUNDED XX

OPEN MOTOR WINDING XXX X

UNIT 52C,P (BTUH) 7,000/9,000 12,000/15,000

CARRIER MOTOR PART NUMBER HC37GE237 HC37GE238

MANUFACTURER’S

PART NUMBER 5KCP29ECA299A 5KCP29ECA301

MOTOR VOLTAGE 208/230 208/230

MOTOR HORSEPOWER .075 .125

MOTOR SPEEDS 22

RESISTANCE (OHMS)

BLACK TO WHITE WIRE 101.4 90

RESISTANCE (OHMS)

BLACK TO BROWN WIRE 45.8 71

RESISTANCE (OHMS)

BLACK TO RED WIRE 38.8 32.9

UNIT 52C,P (BTUH) 7,000/9,000 12,000/15,000

CARRIER MOTOR PART NUMBER HC29GE236 HC33GE239

MANUFACTURER’S

PART NUMBER 5KCP29FCA315 5KCP29FCA316

MOTOR VOLTAGE 265 265

MOTOR HORSEPOWER .075 .125

MOTOR SPEEDS 22

RESISTANCE (OHMS)

BLACK TO WHITE WIRE 144.0 83.7

RESISTANCE (OHMS)

BLACK TO BROWN WIRE 29.3 39.1

RESISTANCE (OHMS)

BLACK TO RED WIRE 82.1 45.2

FAN MOTOR REPLACEMENT

1. DISCONNECT ALL POWER TO UNIT.

2. Remove the unit from the sleeve as detailed in the

UNIT DISASSEMBLY section and place the unit

on a large flat surface.

3. Remove the discharge deck and grille as detailed

in Remove the Discharge Deck Assembly section.

4. Remove heater plate assembly as detailed in

Accessing the Heater Assembly section. The

blower wheel should now be accessible.

5. Using adjustable pliers, carefully remove the

5/32-in. Allen clip that secures the blower wheel to

the fan shaft. Remove the blower wheel.

6. Open the Control box as described in the UNIT

DISASSEMBLY section, Open the Control

Box. Disconnect the fan motor wires from the

rotary switch and capacitor. All units are

equipped with two-speed motors, which have

2 wires on the capacitor and 2 wires on the rotary

switch. Refer to the unit wiring schematic which

is attached to the front panel of the control box.

See Figure 58.

7. Carefully pull fan motor leads through the parti-

tion hole, located in the back of the control box.

8. Remove the top gussets, as detailed in Remove the

Gussets section.

9. Remove the top half of the condenser orifice as

detailed in Detach the Condenser Orifice From the

Condenser Coil section.

10. Using a Phillips head screwdriver, remove the fan

motor shield. The fan motor mounting screws

should now be accessible. Remove the 3 mounting

screws that secure the fan motor to the motor

mount and remove the fan motor from the unit.

11. Using needle nose pliers, remove condenser fan

hub clamp. Slide condenser fan off fan motor

shaft.

12. Re-install the new fan motor by reversing Steps 1

through 11.

Safety glasses should be worn to protect eyes in the

event the spring clip breaks free from pliers.

WIRING

SCHEMATIC

POWER

CORD

FIGURE 58 — LOCATION OF WIRING SCHEMATIC

ON FRONT PANEL OF CONTROL BOX

52C,P

SERIES

50 60 70 80 90 100 110 120 130

Outdoor Air Temperature (F) (40% RH)

70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor

Indoor Coil Delta Temperature (F)

FIELD TEMPERATURE CHARTS

Refer to Figures 59-67 for field temperature data.

FIGURE 59 — 52C AND 52P 7000 BTU UNIT FIELD TEMPERATURE CHART — HIGH COOL — 50% RH

50 60 70 80 90 100 110 120 130

Outdoor Air Temperature (F) (40% RH)

70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor

Indoor Coil Delta Temperature (F)

FIGURE 60 — 52C AND 52P 9000 BTU UNIT FIELD TEMPERATURE CHART — HIGH COOL — 50% RH

52C,P

SERIES

50 60 70 80 90 100 110 120 130

Outdoor Air Temperature (F) (40% RH)

70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor

Indoor Coil Delta Temperature (F)

FIGURE 61 — 52P 12,000 BTU UNIT FIELD TEMPERATURE CHART — HIGH COOL — 50% RH

50 60 70 80 90 100 110 120 130

Outdoor Air Temperature (F) (40% RH)

70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor

Indoor Coil Delta Temperature (F)

FIGURE 62 — 52CQ 12,000 BTU HEAT PUMP UNIT FIELD TEMPERATURE CHART — HIGH COOL — 50% RH

52C,P

SERIES

50 60 70 80 90 100 110 120 130

Outdoor Air Temperature (F) (40% RH)

70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor

Indoor Coil Delta Temperature (F)

FIGURE 63 — 52CE 12,000 BTU HEAT/COOL UNIT FIELD TEMPERATURE CHART — HIGH COOL — 50% RH

50 60 70 80 90 100 110 120 130

Outdoor Air Temperature (F) (40% RH)

70 F Indoor 75 F Indoor 80 F Indoor 85 F Indoor

Indoor Coil Delta Temperature (F)

FIGURE 64 — 52C AND 52P 15,000 BTU UNIT FIELD TEMPERATURE CHART — HIGH COOL — 50% RH

52C,P

SERIES

50 52 54 56 58 60 62 64 66 68 70 72 74

Indoor Entering Air Temperature (F)

Indoor Air Temperature Rise (F)

208 V, 2.3 kW

208 V, 3.4 kW

230/265 V, 2.3 kW

230/265 V, 3.4 kW

FIGURE 65 — 52C AND 52P 7000/9000 BTU UNIT FIELD TEMPERATURE CHART FOR ELECTRIC HEAT — HIGH HEAT

50 52 54 56 58 60 62 64 66 68 70 72 74

Indoor Entering Air Temperature (F)

208 V, 2.3 kW

208 V, 3.4 kW

208 V, 5.0 kW

230/265 V, 2.3 kW

230/265 V, 3.4 kW

230/265 V, 5.0 kW

Indoor Air Temperature Rise (F)

FIGURE 66 — 52C AND 52P 12,000/15,000 BTU UNIT FIELD TEMPERATURE CHART FOR ELECTRIC HEAT — HIGH HEAT

52C,P

SERIES

50 52 54 56 58 60 62 64 66 68 70 72

Indoor Entering Air Temperature (F)

7,000 Btu

9,000 Btu

52P-12,000 Btu

52C-12,000 Btu

15,000 Btu

Indoor Air Temperature Rise (F)

FIGURE 67 — 52C AND 52P 7,000-15,000 BTU UNIT FIELD TEMPERATURE CHART FOR REVERSE CYCLE HEAT — HIGH HEAT

47 F (DRYBULB)/43 F (WET BULB) OUTDOOR AIR

WIRING DIAGRAMS

Refer to Figures 68-72 for Typical Wiring Schematics.

NOTE: Figures 68-72 should not be substituted for the schematic located on control box.

FIGURE 68 — 52CQ & 52PQ — TYPICAL WIRING SCHEMATIC FOR

STANDARD HEAT PUMP UNITS

COMPONENT LEGEND

Component Connection (Marked)

Component Connection (Unmarked)

Accessory or Optional Wiring

To Indicate Common Potential Only

Not To Represent Wire

CAP —Capacitor

COMP —Compressor

FM —Fan Motor

FCS —Fan Cycle Switch

HTR —Heater

IT —Indoor Thermostat

NEC —National Electrical Code

OFT —Outdoor Frost Thermostat

OL —Overload

PLS —Primary Limit Switch

RVS —Reversing Valve Solenoid

SLS —Secondary Limit Switch

ST —Start Thermistor

SW —Switch

NOTES:

1. Recommended for use on grounded power sup-

ply only.

2. Compressor and fan motor thermally protected.

3. Use copper conductors only.

4. All wiring must conform with NEC and local

codes.

5. Dashed lines indicate components when used.

6. OFT determines whether to bring on compres-

sor heat or electric heat.

52C,P

SERIES

TYPICAL THERMOSTAT INTERFACE

1. If ‘W’ is ON, then ‘FR’ is forced ON (regardless of ‘G’) & ‘CR’ is forced OFF.

2. If ‘Y’ is ON, then ‘FR’ is forced ON (regardless of ‘G’).

3. If IFT (indoor coil) is < 35° F, then ‘CR’ is forced OFF until IFT is > 39° F.

T’STAT OUTPUT: RC CONTROLER OUTPUT: UNIT OPERATION:

‘G’ — 24 VAC

‘G’ — 0 VAC

‘FR’ — LINE VAC

‘FR’ — 0 VAC FA N

‘Y’ — 24 VAC

‘O’ — 0 VAC

‘HR1 & HR2’ — LINE VAC

‘RVR’ — LINE VAC HEATING

‘W’ — 24 VAC ‘HR1 & HR2’ — LINE VAC HEATING

‘Y’ — 24 VAC

‘O’ — 24 VAC

‘CR’ — LINE VAC

‘RVR’ — 0 VAC COOLING

‘R’ — 24 VAC

‘C’ — COMMON

‘R’ — 24 VAC OUTPUT

‘C’ — COMMON

POWER TO WALL

THERMOSTAT

NOTES:

1. Recommended for use on grounded power supply only.

2. Compressor and fan motor thermally protected.

3. Use copper conductors only.

4. All wiring must conform with NEC and local codes.

5. Dashed lines indicate components when used.

6. Field control wire suitable for NEC class 2 control circuit, at

24 volts.

7. OFT determines whether to bring on compressor heat or

electric heat.

FIGURE 69 — 52CQ AND 52 PQ — TYPICAL WIRING SCHEMATIC FOR

WALL THERMOSTAT HEAT PUMP UNITS

Component Connection (Marked)

Component Connection (Unmarked)

Terminal Board Connection

Field Splice

Field Control Wiring

Accessory or Optional Wiring

To Indicate Common Potential Only

Not To Represent Wire

CAP —Capacitor

COMP —Compressor

FM —Fan Motor

COMPONENT LEGEND

HTR —Heater

IFT —Indoor Frost Thermostat

NEC —National Electrical Code

OFT —Outdoor Frost Thermostat

OL —Overload

PCBD —Printed Circuit Board

HR1 —Heater Relay

HR2 —Heater Relay

CR —Compressor Relay

FR —Fan Relay

RVR —Reversing Valve Relay

PLS —Primary Limit Switch

RVS —Reversing Valve Solenoid

SLS —Secondary Limit Switch

SSS —Speed Selector Switch

ST —Start Thermistor

TRANS —Transformer

FIGURE 70 — 52CE AND 52PE — TYPICAL WIRING SCHEMATIC FOR

STANDARD HEAT/COOL UNITS

COMPONENT LEGEND

Component Connection (Marked)

Component Connection (Unmarked)

Accessory or Optional Wiring

To Indicate Common Potential Only

Not To Represent Wire

CAP —Capacitor

COMP —Compressor

FM —Fan Motor

FCS —Fan Cycle Switch

HTR —Heater

IT —Indoor Thermostat

NEC —National Electrical Code

OL —Overload

PLS —Primary Limit Switch

SLS —Secondary Limit Switch

ST —Start Thermistor

SW —Switch

NOTES:

1. Recommended for use on grounded power sup-

ply only.

2. Compressor and fan motor thermally protected.

3. Use copper conductors only.

4. All wiring must conform with NEC and local

codes.

5. Dashed lines indicate components when used.

52C,P

SERIES

FIGURE 71 — 52CE AND 52PE — TYPICAL WIRING SCHEMATIC FOR

WALL THERMOSTAT CONTROL HEAT/COOL UNITS

NOTES:

1. Recommended for use on grounded power supply only.

2. Compressor and fan motor thermally protected.

3. Use copper conductors only.

4. All wiring must conform with NEC and local codes.

5. Dashed lines indicate components when used.

6. Field control wire suitable for NEC class 2 control circuit, at

24 volts.

Component Connection (Marked)

Component Connection (Unmarked)

Terminal Board Connection

Field Splice

Field Control Wiring

Accessory or Optional Wiring

To Indicate Common Potential Only

Not To Represent Wire

CAP —Capacitor

COMP —Compressor

FM —Fan Motor

HTR —Heater

IFT —Indoor Frost Thermostat

NEC —National Electrical Code

OL —Overload

PCBD —Printed Circuit Board

HR1 —Heater Relay

HR2 —Heater Relay

CR —Compressor Relay

FR —Fan Relay

PLS —Primary Limit Switch

SLS —Secondary Limit Switch

SSS —Speed Selector Switch

ST —Start Thermistor

TRANS —Transformer

COMPONENT LEGEND

FIGURE 72 — 52PC — TYPICAL WIRING SCHEMATIC FOR

STANDARD COOLING ONLY UNITS

52C,P

SERIES

MOST FREQUENT PTAC SERVICE QUESTIONS

1. Can remote wall thermostats be used on

standard (AA) models? No, only for use on remote control (RC,RP) models. How-

ever, accessory RC-Retrofit Kit can be ordered to convert

standard units to RC units.

2. Which remote thermostats are acceptable

for use on 52C,P products? HH01AD045 — Manual changeover thermostat

TSTATCCBPC01-B (Heat/Cool) — Non-Programmable

thermostat

TSTATCCBPH01-B (Heat Pump) — Non-Programmable

thermostat

TSTATCCPAC01-B (Heat/Cool) — Digital Programmable

thermostat

TSTATCCPHP01-B (Heat Pump) — Digital Programmable

thermostat

3. How many 52C,P series units can be

controlled by one remote thermostat? Maximum of 4.

4. What is the vent capacity of the

52C,P products? 50 cfm (standalone). Capacity can be increased with the

use of an external exhaust fan.

5. How do the 52C,P series models handle

condensate removal? By using a 2-stage condensate removal system. First

stage uses a slinger ring to pick up condensate and move

it to the outdoor coil to be evaporated. In second stage, a

vortex pump will suck condensate water into the con-

denser airstream where it will be blown onto the outdoor

coil for evaporation.

6. At what temperature will the outdoor

(defrost) thermostat switch the unit (heat

pumps only) into defrost (emergency heat)

mode?

When the outdoor coil temperature falls below 20 F

(outdoor ambient temperature of approximately 35 F)

and will stay in a passive defrost until outdoor coil is

greater than 35 F.

7. Can the PTAC unit be configured to allow

continuous fan operation? Yes. A switch located on the front of the control

box is used to toggle between continuous or cycle

fan mode.

8. Can the discharge air grille be changed to

alter the direction of the airflow? Yes. Remove the 2 screws and flip the grille over

180 degrees.

9. What does the outdoor thermostat

switch do? The selector screw, located on the front of the control

box, prevents the compressor from energizing in

heating mode during subfreezing conditions to ensure

adequate heating capacity. For units with unit-mounted

controls, the switch must be returned to the ‘‘heat pump’’

position for compressor operation during cooling modes.

ACCESSORIES

*Extended metal wall sleeve also available in 26 in. and 28 in. depth.

†Custom colors are also available.

ACCESSORY FORM NUMBER PART NUMBER DESCRIPTION

Wall Sleeves 52S-48SI WALL-SLEEVE-1PK Non-Insulated Plastic Wall Sleeve, 1 per pack

WALL-SLEEVE-9PK Non-Insulated Plastic Wall Sleeve, 9 per pack

SLEEVE-INSUL-1PK Insulated Plastic Wall Sleeve, 1 per pack

52S-50SI SLEEVE-STEEL-1PK Insulated Metal Wall Sleeve, 1 per pack

52S-49SI* SLEEVE-EXT24-1PK Extended Metal Wall Sleeve for Deep Wall Applications (24 in. deep), 1 per pack

52C,P-20SI FR-SLEEVE-EXT Friedrich wall sleeve extension to retrofit Carrier PTAC unit into Friedrich 111/2

″ deep (T Series) wall

sleeve. 1 per pack

Exterior Grilles†52S-59SI GRILLE-ALU-STAMP Stamped Aluminum Exterior Grille, Clear Finish

52S-65SI GRILLE-PLA-BROWN Plastic Architectural Rear Grille, Brown

GRILLE-PLA-BEIGE Plastic Architectural Rear Grille, Beige

52S-60SI GRILLE-ALU-CLEAR Aluminum Architectural Exterior Grille, Clear Finish

GRILLE-ALU-WHITE Aluminum Architectural Exterior Grille, White

GRILLE-ALU-BRONZ Aluminum Architectural Exterior Grille, Light Bronze

GRILLE-ALU-MBRNZ Aluminum Architectural Exterior Grille, Medium Bronze

GRILLE-ALU-BROWN Aluminum Architectural Exterior Grille, Brown (Dark Bronze)

GRILLE-ALU-BEIGE Aluminum Architectural Exterior Grille, Beige

GRILLE-ALU-ALPIN Aluminum Architectural Exterior Grille, Alpine (matches Carrier Wall Sleeve)

GRILLE-ALU-PEACH Aluminum Architectural Exterior Grille, Peach

GRILLE-ALU-MELON Aluminum Architectural Exterior Grille, Melon

GRILLE-ALU-LGREY Aluminum Architectural Exterior Grille, Light Grey

GRILLE-ALU-SGREY Aluminum Architectural Exterior Grille, Slate Gray

GRILLE-ALU-RDBRK Aluminum Architectural Exterior Grille, Red Brick

GRILLE-ALU-BLUE Aluminum Architectural Exterior Grille, Blue

GRILLE-ALU-GREEN Aluminum Architectural Exterior Grille, Green

Subbase 52C,P-1SI SUBBASE-NON-ELEC Non-electrical Subbase

52C,P-2SI SUBBASE-230V-15A Electrical subbase with factory-installed 208/230 V, 15 amp receptacle

SUBBASE-230V-20A Electrical subbase with factory-installed 208/230 V, 20 amp receptacle

SUBBASE-230V-30A Electrical subbase with factory-installed 208/230 V, 30 amp receptacle

SUBBASE-265V-15A Electrical subbase with factory-installed 265 V, 15 amp receptacle

SUBBASE-265V-20A Electrical subbase with factory-installed 265 V, 20 amp receptacle

SUBBASE-265V-30A Electrical subbase with factory-installed 265 V, 30 amp receptacle

52C,P-3SI SUBBASE-HARDWIRE Electrical subbase with factory-installed hardwire kit (230/208 V and 265 V)

Subbase

Field-Installed

Kits

52C,P-4SI SUBBASE-SWITCH Field-Installable Switch kit for an electrical subbase

52C,P-5SI SUBBASE-FUSE-15A Field-Installed Fuse Kit (15 amp) for electrical subbase

SUBBASE-FUSE-20A Field-Installed Fuse Kit (20 amp) for electrical subbase

SUBBASE-FUSE-30A Field-Installed Fuse Kit (30 amp) for electrical subbase

Electrical

Connections

52C,P-11SI HARDWIRE-KIT-1PK Permanent power connection to the unit (includes 36″ of flexible conduit and unit-mounted

connector, 230/208 V and 265 V) 1 per pack

52C,P-19SI CONDUIT-INTF-4PK Interface kit for field-supplied conduit to provide permanent power connection (230/208 V and 265 V)

to the unit. Kit includes Molex connector for easy connect/disconnect. 4 per pack

Condensate

Drain Kit

52S-53SI DRAIN-KIT-4PK Attaches to wall sleeve for controlled internal or external disposal of condensate 4 per pack

Wall

Thermostats

N/A HH01AD045 Electro-mechanical Wall Thermostat (Heat/Cool and Heat Pump)

TSTATCCBPC01-B Value Series Electronic Thermostat w/Digital display (Heat/Cool Models)

TSTATCCBPH01-B Value Series Electronic Thermostat w/Digital display (Heat Pump Models)

TSTATCCPAC01-B 7-Day Programmable Electronic Thermostat (Heat/Cool Models)

TSTATCCPHP01-B 7-Day Programmable Electronic Thermostat (Heat Pump Models)

Wall Thermostat

Interface

Retrofit Kit

52C,P-16SI RC-FIELDKIT230HC Field-installed wall thermostat retrofit kit to convert a standard 230 V Heat/Cool unit to an

RC unit. Wall thermostat sold separately (can be used to convert a cool only unit to RC).

RC-FIELDKIT230HP Field-installed wall thermostat retrofit kit to convert a standard 230-V Heat Pump unit to an

RC unit. Wall thermostat sold separately.

RC-FIELDKIT265HC Field-installed wall thermostat retrofit kit to convert a standard 265 V Heat/Cool unit to an

RC unit. Wall thermostat sold separately (can be used to convert a cool only unit to RC).

RC-FIELDKIT265HP Field-installed wall thermostat retrofit kit to convert a standard 265-V Heat Pump unit to a

RC unit. Wall thermostat sold separately.

N/A TSTAT-COVER-6X7 Clear plastic locking thermostat cover prevents unauthorized access to thermostat. Cover for use with

non-programmable and electro-mechanical thermostats. Outside dimensions: 61/2

″ x 71/2

″ x 215/16

″.

1 per pack

N/A TSTAT-COVER-7X10 Clear plastic locking thermostat cover prevents unauthorized access to thermostat. Cover for use with

programmable thermostats. Outside dimensions: 71/4

″ x 93/4

″ x 33/8

″. 1 per pack

Replacement

Filters

N/A AIR-FILTER-10PK Replacement air filters in package of 10

Energy

Management

52C,P-24SI EM-KIT Allows unit to be turned on and off from a remote location (includes freeze guard protection)

Locking Security

Control Door

52C,P-23SI SECURITY-DOOR Key-locking security door to prevent access to heating and cooling controls

Lateral Duct Kit 52C,P-14SI LATERAL-DUCT Ductwork to allow one unit to heat and cool two rooms (plenum plus extension duct and registers)

Air/Curtain

Deflector

52C,P-9SI DEFLECTOR-1PK Lateral air deflector, with individually adjustable louvers, to enhance air circulation, 1 per pack

N/A CURTDFL-52CP-1PK Curtain deflector for 52C and 52P models — prevents curtains from blowing into discharge airstream.

1 per pack.

NOTE: Curtain deflector for previous models are also available. Contact Carrier Representative.

52C,P

SERIES

52C PERFORMANCE AND PHYSICAL DATA

FIGURE 73 — 52CE — PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT/COOL UNITS

FIGURE 74 — 52CQ — PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT PUMP UNITS

CATALOG

NUMBER

COOLING

(Btuh) EER ELECTRIC

HEAT (Btuh) COP

REVERSE

CYCLE

HEAT (Btuh)

EVAP. FAN

CFM

(HI-SPEED)

APPROX.

WEIGHT

(SHIP)

1-PH, 60 Hz

VOLTS

CURRENT (AMPS) INPUT POWER (WATTS) BRANCH

CIRCUIT FUSE

(AMPS)

R-22

CHARGE

(oz)

Cooling Electric

Heat Cooling Electric

Heat

52CE-207---3 7,000/ 6,900 11.1/11.1 7,800/ 6,400 —— 260/250 125 230/208 2.7/2.9 10.4/ 9.5 631/ 622 2393/1985 15 24

52CE-307---3 7,000/ 6,900 11.1/11.1 11,600/ 9,700 —— 260/250 125 230/208 2.7/2.9 15.2/14.1 631/ 622 3493/2935 20 24

52CE-209---3 9,000/ 8,900 10.7/10.7 7,800/ 6,400 —— 260/250 125 230/208 3.7/3.8 10.4/ 9.5 841/ 832 2393/1985 15 24

52CE-309---3 9,000/ 8,900 10.7/10.7 11,600/ 9,700 —— 260/250 125 230/208 3.7/3.8 15.2/14.1 841/ 832 3493/2935 20 24

52CE-212---3 12,000/11,900 10.1/10.1 7,800/ 6,400 —— 350/320 140 230/208 5.2/5.6 10.8/ 9.9 1188/1178 2470/2047 15 34

52CE-312---3 12,000/11,900 10.1/10.1 11,600/ 9,700 —— 350/320 140 230/208 5.2/5.6 15.6/14.5 1188/1178 3570/2997 20 34

52CE-512---3 12,000/11,900 10.1/10.1 17,000/13,600 —— 350/320 140 230/208 5.2/5.6 22.5/20.0 1188/1178 5170/4147 30 34

52CE-215---3 14,500/14,000 9.4/ 9.5 7,800/ 6,400 —— 350/320 150 230/208 6.8/7.6 10.9/10.0 1543/1473 2517/2117 15 35

52CE-315---3 14,500/14,000 9.4/ 9.5 11,600/ 9,700 —— 350/320 150 230/208 6.8/7.6 15.7/14.6 1543/1473 3617/3067 20 35

52CE-515---3 14,500/14,000 9.4/ 9.5 17,000/13,600 —— 350/320 150 230/208 6.8/7.6 22.6/20.1 1543/1473 5217/4217 30 35

52CE-207---4 7,000 11.1 7,800 —— 260 125 265 2.4 9.2 631 2396 15 26

52CE-307---4 7,000 11.1 11,600 —— 260 125 265 2.4 13.3 631 3496 20 26

52CE-209---4 8,900 10.7 7,800 —— 260 125 265 3.1 9.2 832 2396 15 24

52CE-309---4 8,900 10.7 11,600 —— 260 125 265 3.1 13.3 832 3496 20 24

52CE-212---4 12,000 10.1 7,800 —— 340 140 265 4.6 9.4 1188 2470 15 34

52CE-312---4 12,000 10.1 11,600 —— 340 140 265 4.6 13.5 1188 3570 20 34

52CE-512---4 12,000 10.1 17,000 —— 340 140 265 4.6 19.6 1188 5170 25 34

52CE-215---4 14,500 9.4 7,800 —— 340 150 265 6.0 9.7 1543 2517 15 36

52CE-315---4 14,500 9.4 11,600 —— 340 150 265 6.0 13.8 1543 3617 20 36

52CE-515---4 14,500 9.4 17,000 —— 340 150 265 6.0 19.9 1543 5217 25 36

CATALOG

NUMBER

COOLING

(Btuh) EER ELECTRIC

HEAT (Btuh) COP

REVERSE

CYCLE

HEAT (Btuh)

EVAP. FAN

CFM

(HI-SPEED)

APPROX.

WEIGHT

(SHIP)

1-PH, 60 Hz

VOLTS

CURRENT (AMPS) INPUT POWER (WATTS) BRANCH

CIRCUIT FUSE

(AMPS)

R-22

CHARGE

(oz)

Cooling Electric

Heat Cooling Electric

Heat

52CQ-207---3 7,000/ 6,900 11.1/11.1 7,800/ 6,400 3.1/3.1 6,100/ 6,000 260/250 125 230/208 2.7/2.9 10.4/ 9.5 631/ 622 2393/1985 15 24

52CQ-307---3 7,000/ 6,900 11.1/11.1 11,600/ 9,700 3.1/3.1 6,100/ 6,000 260/250 125 230/208 2.7/2.9 15.2/14.1 631/ 622 3493/2935 20 24

52CQ-209---3 9,000/ 8,900 10.7/10.7 7,800/ 6,400 3.1/3.1 7,900/ 7,800 260/250 125 230/208 3.7/3.8 10.4/ 9.5 841/ 832 2393/1985 15 24

52CQ-309---3 9,000/ 8,900 10.7/10.7 11,600/ 9,700 3.1/3.1 7,900/ 7,800 260/250 125 230/208 3.7/3.8 15.2/14.1 841/ 832 3493/2935 20 24

52CQ-212---3 12,000/11,900 10.1/10.1 7,800/ 6,400 3.0/3.0 10,800/10,700 350/320 140 230/208 4.7/5.2 10.8/ 9.9 1188/1178 2470/2047 15 34

52CQ-312---3 12,000/11,900 10.1/10.1 11,600/ 9,700 3.0/3.0 10,800/10,700 350/320 140 230/208 4.7/5.2 15.6/14.5 1188/1178 3570/2997 20 34

52CQ-512---3 12,000/11,900 10.1/10.1 17,000/13,600 3.0/3.0 10,800/10,700 350/320 140 230/208 4.7/5.2 22.5/20.0 1188/1178 5170/4147 30 34

52CQ-215---3 14,500/14,000 9.4/ 9.5 7,800/ 6,400 2.9/2.9 13,400/13,200 350/320 150 230/208 6.8/7.6 10.9/10.0 1543/1473 2517/2117 15 35

52CQ-315---3 14,500/14,000 9.4/ 9.5 11,600/ 9,700 2.9/2.9 13,400/13,200 350/320 150 230/208 6.8/7.6 15.7/14.6 1543/1473 3617/3067 20 35

52CQ-515---3 14,500/14,000 9.4/ 9.5 17,000/13,600 2.9/2.9 13,400/13,200 350/320 150 230/208 6.8/7.6 22.6/20.1 1543/1473 5217/4217 30 35

52CQ-207---4 7,000 11.1 7,800 3.1 6,100 260 125 265 2.4 9.2 631 2396 15 26

52CQ-307---4 7,000 11.1 11,600 3.1 6,100 260 125 265 2.4 13.3 631 3496 20 26

52CQ-209---4 8,900 10.7 7,800 3.1 7,700 260 125 265 3.1 9.2 832 2396 15 24

52CQ-309---4 8,900 10.7 11,600 3.1 7,700 260 125 265 3.1 13.3 832 3496 20 24

52CQ-212---4 12,000 10.1 7,800 3.0 10,800 340 140 265 4.5 9.4 1188 2470 15 34

52CQ-312---4 12,000 10.1 11,600 3.0 10,800 340 140 265 4.5 13.5 1188 3570 20 34

52CQ-512---4 12,000 10.1 17,000 3.0 10,800 340 140 265 4.5 19.6 1188 5170 25 34

52CQ-215---4 14,500 9.4 7,800 2.9 13,400 340 150 265 6.0 9.7 1543 2517 15 36

52CQ-315---4 14,500 9.4 11,600 2.9 13,400 340 150 265 6.0 13.8 1543 3617 20 36

52CQ-515---4 14,500 9.4 17,000 2.9 13,400 340 150 265 6.0 19.9 1543 5217 25 36

52P PERFORMANCE AND PHYSICAL DATA

FIGURE 75 — 52PE — PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT/COOL UNITS

FIGURE 76 — 52PQ — PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT PUMP UNITS

CATALOG

NUMBER

COOLING

(Btuh) EER ELECTRIC

HEAT (Btuh) COP

REVERSE

CYCLE

HEAT (Btuh)

EVAP. FAN

CFM

(HI-SPEED)

APPROX.

WEIGHT

(SHIP)

1-PH, 60 Hz

VOLTS

CURRENT (AMPS) INPUT POWER (WATTS) BRANCH

CIRCUIT FUSE

(AMPS)

R-22

CHARGE

(oz)

Cooling Electric

Heat Cooling Electric

Heat

52PE-207---3 7,200/ 7,100 12.7/12.7 7,800/ 6,400 —— 260/250 125 230/208 2.7/2.9 10.4/ 9.5 567/ 559 2393/1985 15 24

52PE-307---3 7,200/ 7,100 12.7/12.7 11,600/ 9,700 —— 260/250 125 230/208 2.7/2.9 15.2/14.1 567/ 559 3493/2935 20 24

52PE-209---3 9,100/ 9,000 11.5/11.5 7,800/ 6,400 —— 260/250 125 230/208 3.7/3.8 10.4/ 9.5 791/ 783 2393/1985 15 24

52PE-309---3 9,100/ 9,000 11.5/11.5 11,600/ 9,700 —— 260/250 125 230/208 3.7/3.8 15.2/14.1 791/ 783 3493/2935 20 24

52PE-212---3 12,100/12,000 11.1/10.7 7,800/ 6,400 —— 350/320 140 230/208 4.8/5.3 10.8/ 9.9 1090/1122 2470/2047 15 34

52PE-312---3 12,100/12,000 11.1/10.7 11,600/ 9,700 —— 350/320 140 230/208 4.8/5.3 15.6/14.5 1090/1122 3570/2997 20 34

52PE-512---3 12,100/12,000 11.1/10.7 17,000/13,600 —— 350/320 140 230/208 4.8/5.3 22.5/20.0 1090/1122 5170/4147 30 34

52PE-215---3 14,500/14,000 9.4/ 9.5 7,800/ 6,400 —— 350/320 150 230/208 6.8/7.6 10.9/10.0 1543/1473 2517/2117 15 35

52PE-315---3 14,500/14,000 9.4/ 9.5 11,600/ 9,700 —— 350/320 150 230/208 6.8/7.6 15.7/14.6 1543/1473 3617/3067 20 35

52PE-515---3 14,500/14,000 9.4/ 9.5 17,000/13,600 —— 350/320 150 230/208 6.8/7.6 22.6/20.1 1543/1473 5217/4217 30 35

52PE-207---4 7,200 12.7 7,800 —— 260 125 265 2.4 9.2 567 2396 15 26

52PE-307---4 7,200 12.7 11,600 —— 260 125 265 2.4 13.3 567 3496 20 26

52PE-209---4 9,100 11.5 7,800 —— 260 125 265 3.1 9.2 791 2396 15 24

52PE-309---4 9,100 11.5 11,600 —— 260 125 265 3.1 13.3 791 3496 20 24

52PE-212---4 12,100 11.1 7,800 —— 340 140 265 4.2 9.4 1090 2470 15 34

52PE-312---4 12,100 11.1 11,600 —— 340 140 265 4.2 13.5 1090 3570 20 34

52PE-512---4 12,100 11.1 17,000 —— 340 140 265 4.2 19.6 1090 5170 25 34

52PE-215---4 14,500 9.4 7,800 —— 340 150 265 6.0 9.7 1543 2517 15 36

52PE-315---4 14,500 9.4 11,600 —— 340 150 265 6.0 13.8 1543 3617 20 36

52PE-515---4 14,500 9.4 17,000 —— 340 150 265 6.0 19.9 1543 5217 25 36

CATALOG

NUMBER

COOLING

(Btuh) EER ELECTRIC

HEAT (Btuh) COP

REVERSE

CYCLE

HEAT (Btuh)

EVAP. FAN

CFM

(HI-SPEED)

APPROX.

WEIGHT

(SHIP)

1-PH, 60 Hz

VOLTS

CURRENT (AMPS) INPUT POWER (WATTS) BRANCH

CIRCUIT FUSE

(AMPS)

R-22

CHARGE

(oz)

Cooling Electric

Heat Cooling Electric

Heat

52PQ-207---3 7,200/ 7,100 12.7/12.7 7,800/ 6,400 3.4/3.4 6,300/ 6,300 260/250 125 230/208 2.7/2.9 10.4/ 9.5 567/ 559 2393/1985 15 24

52PQ-307---3 7,200/ 7,100 12.7/12.7 11,600/ 9,700 3.4/3.4 6,300/ 6,300 260/250 125 230/208 2.7/2.9 15.2/14.1 567/ 559 3493/2935 20 24

52PQ-209---3 9,100/ 9,000 11.5/11.5 7,800/ 6,400 3.2/3.2 7,900/ 7,900 260/250 125 230/208 3.7/3.8 10.4/ 9.5 791/ 783 2393/1985 15 24

52PQ-309---3 9,100/ 9,000 11.5/11.5 11,600/ 9,700 3.2/3.2 7,900/ 7,900 260/250 125 230/208 3.7/3.8 15.2/14.1 791/ 783 3493/2935 20 24

52PQ-212---3 12,100/12,000 11.1/10.7 7,800/ 6,400 3.2/3.2 11,000/11,000 350/320 140 230/208 4.8/5.3 10.8/ 9.9 1090/1122 2470/2047 15 34

52PQ-312---3 12,100/12,000 11.1/10.7 11,600/ 9,700 3.2/3.2 11,000/11,000 350/320 140 230/208 4.8/5.3 15.6/14.5 1090/1122 3570/2997 20 34

52PQ-512---3 12,100/12,000 11.1/10.7 17,000/13,600 3.2/3.2 11,000/11,000 350/320 140 230/208 4.8/5.3 22.5/20.0 1090/1122 5170/4147 30 34

52PQ-215---3 14,500/14,000 9.4/ 9.5 7,800/ 6,400 2.9/2.9 13,400/13,200 350/320 150 230/208 6.8/7.6 10.9/10.0 1543/1473 2517/2117 15 35

52PQ-315---3 14,500/14,000 9.4/ 9.5 11,600/ 9,700 2.9/2.9 13,400/13,200 350/320 150 230/208 6.8/7.6 15.7/14.6 1543/1473 3617/3067 20 35

52PQ-515---3 14,500/14,000 9.4/ 9.5 17,000/13,600 2.9/2.9 13,400/13,200 350/320 150 230/208 6.8/7.6 22.6/20.1 1543/1473 5217/4217 30 35

52PQ-207---4 7,200 12.7 7,800 3.4 6,300 260 125 265 2.4 9.2 567 2396 15 26

52PQ-307---4 7,200 12.7 11,600 3.4 6,300 260 125 265 2.4 13.3 567 3496 20 26

52PQ-209---4 9,100 11.5 7,800 3.2 7,700 260 125 265 3.1 9.2 791 2396 15 24

52PQ-309---4 9,100 11.5 11,600 3.2 7,700 260 125 265 3.1 13.3 791 3496 20 24

52PQ-212---4 12,100 11.1 7,800 3.2 10,800 340 140 265 4.2 9.4 1090 2470 15 34

52PQ-312---4 12,100 11.1 11,600 3.2 10,800 340 140 265 4.2 13.5 1090 3570 20 34

52PQ-512---4 12,100 11.1 17,000 3.2 10,800 340 140 265 4.2 19.6 1090 5170 25 34

52PQ-215---4 14,500 9.4 7,800 2.9 13,400 340 150 265 6.0 9.7 1543 2517 15 36

52PQ-315---4 14,500 9.4 11,600 2.9 13,400 340 150 265 6.0 13.8 1543 3617 20 36

52PQ-515---4 14,500 9.4 17,000 2.9 13,400 340 150 265 6.0 19.9 1543 5217 25 36

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 132 Catalog No. 535-20050 Printed in U.S.A. Form 52C,P-2SM Pg 52 11-02 Replaces: 52C,P-1SM

Book 1 4

Tab 9a 11a

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