Carrier 52C, 52P User Manual

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Page 1

52C,P

SERIES

SERVICE TECHNICIAN GUIDE

PACKAGED TERMINAL AIR CONDITIONERS

AND HEAT PUMPS

CONTENTS

INTRODUCTION

SUMMARY OF DANGERS, WARNINGS,

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

UNIT DISASSEMBLY

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

REMOVE FRONT P ANEL . . . . . . . . . . . . . . . . . . . . . . . 3

DISCONNECT POWER FOR

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

DISCONNECT POWER FOR PERMANE N TLY

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

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

REMOVE THE UNIT FROM THE W ALL SLEEVE . . 4

ACCESSING UNIT COMPONENTS

ACCESSING INDOOR-AIR SECTION

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

ACCESSING OUTDOOR-AIR SECTION

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

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

GENERAL CLEANING

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

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

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

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

COMPRESSOR

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

BASIC HERMETIC COMPRESSOR

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

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

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

. . . . . . . . . . . . . . . . . . . . . . . . . . .3,4

. . . . . . . . . . . . . .5-8

. . . . . . . . . . . . . . . . . . . . . . . . .9-12

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

Page

HEATERS

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

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

OPERATING CONTROLS

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

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

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

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

FIELD TEMPERATURE CHARTS WIRING DIAGRAMS MOST FREQUENT PTAC SERVICE

QUESTIONS ACCESSORIES 52C PERFORMANCE AND PHYSICAL DATA 52P PERFORMANCE AND PHYSICAL DATA

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

. . . . . . . . . . . . . . . . . . . . . 20-28

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-31

. . . . . . . . . . . . . . 32-40

. . . . . . . . . . . . . . . . . . . . . . . . 41-45

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

. . . . . .48

. . . . . .49

Page

PTAC Customer Support Center

1•800•894•6449

Page 2

52C,P

CANADIAN INSTALLATION

SERIAL 3701X11520 DATE OF MFG. 09/12/2001 VOLT RANGE 187-253 VOLTS 230/208 PH 1

MODEL 52PQA312301AA

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 29

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

USE

TIME DELAY FUSE

OR HACR TYPE

CIRCUIT BREAKER

AMP

AMP AMP

MAX FUSE

MAX BREAKER

SERIES

INTRODUCTION

The focus of this manual is to provide basic information on service procedures, safety, troubleshooting, cleaning, and component replacement for service technicians. 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 service instructions shipped with the unit. No attempt to install, ope rate, adju st, re pair , or di smant le any equi pment should be made until the manufacturer’s i nstructions are read and thoroughly understood by the service technician. Even equipment that seems familiar may have specific model diffe rences 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 heating 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 procedu res, it is important 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 determine if the unit is performing at optimum levels. The model number is located on the data informatio n plate beneath the front panel of the unit. See Figure 1. The data information plate also lis ts voltage ranges and other important electric al 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 meanings are:

There is an immediate hazard which WILL result in severe personal injury or death.

Potential hazards or unsafe practices which COULD result in minor personal injury or equipment damage.

FIGURE 1 — SAMPLE DATA INFORMATION

PLATE

Hazards or unsafe practices which COULD result in severe personal injury or death.

Page 3

52 PQ A 3 12 3 0 1 AA

Series Designation

PTAC (Packaged Terminal Air Conditioner)

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

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

Cooling Capacity (nominal)

07 – 7,000 Btuh 09 – 9,000 Btuh 12 – 12,000 Btuh 15 – 15,000 Btuh

FIGURE 2 — MODEL NUMBER NOMENCLATURE

UNIT DISASSEMBLY

This section includes common procedures for disassembly and re-assembly of u nit.

IMPORTANT: Follow manufacturer’s instructions when disassembling and re-assembling a unit for cleaning, maintenance, or part replacement. 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, disconnect all power to avoid electric shock! Tag all disconnects. Never alter cord or plug and do not use extension cords.

TOOLS NEEDED

The following field-supplied items are recommended for general disassembly of the unit:

• Flat head screw driver

•

/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.

Chassis Options

Blank or AA – Standard

CP – Corrosion Protection RC – Wall Thermostat Control RP – Wall Thermostat Control with

Corrosion Protection

Packaging

1 – Domestic

Non-Performance

Changes 0-9

Electrical Data

3 – 230/208-v, 60 Hz 4 – 265-v, 60 Hz

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 swi tch 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 swi tch 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.

Page 4

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 moun tin g scr e ws tha t secu re th e 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 ma y be in a differen t location depending on brand of wall sleeve attached.

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 LABORATOIES INC., AS TO ELECTRIC SHOCK, FIRE AND ASUALTY HAZARDS ONLY. FOR FIELD INSTALATION WITH EXISTING WALL SLEEVES, OUT-

OOR, LOUVERS, AND INDOOR PANELS AS

PECIFIED ON THE PRODUCT.

The chassis weighs between 110 and 150 lbs. Take proper safety precautions to avoid personal injury when lifting and moving the chassi s.

The unit basepan may have water in it. Tilt the unit back slightly whe n removing it fro m th e sl e eve to drain some of the water into the sleeve.

CONDUIT

ACCESS PANEL

MOLEX PLUGS

FIGURE 5 — PLUG ASSEMBLY ON

HARDWIRE UNITS

Page 5

POWER

GE WALL SLEEVE HOLES

AMANA, TRANE (SLOTTED HOLES) WALL SLEEVE HOLES

VARIOUS ATTACHMENT

HOLE LOCATIONS

CARRIER, BRYANT WALL SLEEVE HOLES

CORD ACCESS COVER

POWER CORD

FIGURE 6 — CONTROL BOX COVER

CONTROL BOX SCREWS

FIGURE 7 — PTAC UNIT TO WALL

SLEEVE MOUNTING SCREWS

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

2. Locate and remove the 2 bottom bracket screws

3. Carefully lift the plenum up and away from front

REMOVE THE DISCHARGE DECK ASSEMBLY

■

1. Remove the front panel. Re fer to Remove Front

2. Remove discharge screen screw using a

3. Remove th e dischar ge deck assembly screws using

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

5. Reassemble by reversing steps above.

ACCESSING UNIT COMPONENTS

duct plenum to the top of the lateral duct extension. See Figure 8.

(located opposite extension duct) that secure the lateral duct plenum to the bracket flange. See Figure 8.

panel and duct extension.

Panel section and Figure 4.

/16-in. nut

driver. See Figure 9.

/16-in. nut driver. See Fi gure 9.

unit.

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 assembl y. Label ea ch wire for ea se 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.

Page 6

52C,P

SERIES

END CAP

BRACKET SCREWS

PLENUM LATERAL DUCT

LEFT BRACKET

TOP SCREWS (2)

EXTENSION

RIGHT BRACKET

FIGURE 8 — PTAC UNIT WITH LATERAL

DUCT ACCESSORY INSTALLED

ATTACHMENT SCREWS

WALL

BRACKET SCREWS

DISCHARGE DECK

FIGURE 10 — ACCESSING HEAT ER

HEATER PLATE ASSEMBLY

PLATE ASSEMBLY

DISCHARGE SCREEN

DISCHARGE DECK

FIGURE 9 — LOCATION OF ATTACHMENT

SCREWS ON DISCHARGE DECK OF UNIT

DETACH THE CONDENSER ORIFICE FROM THE

■

CONDENSER COIL

1. Remove top half of condenser orifice. a. Unscrew the top half of the condens er orifi ce b y

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 con d e nse r on bas epan . Se e Figure 17.

FIGURE 11 — REMOVAL OF HEATER

PLATE ASSEMBLY

d. Using Needle Nose Pliers remove co ndenser 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.

Page 7

GUSSET

GUSSET SCREWS

CONDENSER ORIFICE (PLASTIC)

PARTITION GUSSET

GUSSET SCREWS

FIGURE 12 — GUSS ET RE M O VAL

CONDENSER ORIFICE

CAPTIVE SCREWS (2)

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

Page 8

52C,P

SERIES

OUTDOOR COIL TUBE SHEET SCREWS

FIGURE 16 — LOCATION OF OUTDOOR

COIL TUBE SHEET SCREWS

CONDENSER FAN

HUB CLAMP

FIGURE 18 — REMOVING COND EN SER

FAN HUB CLAMP

FIGURE 17 — REMOVING OUTDOOR COIL

FROM CONDENSER FAN

CONTROL DOOR HINGE PINS

FRONT PANEL (BACK VIEW)

SCREW SCREW

DISCHARGE GRILLE

FIGURE 19 — LOCATION OF SCREWS ON

DISCHARGE GRILLE

REINSTALL FRONT PANEL

1. Grasp the front panel firmly at the center of the top and bottom of the panel, tilti ng it fo rwar d 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.

Page 9

GENERAL CLEANING

Maintaining proper performance of 52C,P systems requires conscientious cleaning and care of components. See Figure 20. Specific components require periodic cleaning and/or replacement, including the following:

COMPONENT CLEANING SCHEDULE

Indoor Air Filter

Vent Air Filter

Indoor Coil Indoor Fan

Outdoor Coil

Monthly

Monthly Seasonally Seasonally Seasonally

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.

Before cleaning, servicing, performing maintenance, or removing the chassis from the wall sleeve, disconnect 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 maintenance tasks such as cleaning and replacing filters. Refer to General Disassembly section of this ma nual 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 shoul d be clea n and free of debris.

• The 52C,P unit weighs up to 150 pounds. Use a lifting 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)

CHASSIS (STANDARD)

FIGURE 20 — STANDARD 52C UNIT

EXTERIOR GRILLE (ACCESSORY)

WALL SLEEVE (ACCESSORY)

Page 10

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.

Vacuum Cleaner with Crevice Tool Attachment,

Lifting Device (or another person for assistance)

Trigger Spray Extension Tube (Part No. P9029000)

Vent Air Filter Replacement (Part No. 52CQ500144)

Condenser Coil Cleaning Solution (Part No. P9020501)

Evaporator Coil Cleaning Solution (Part No. P90221001)

3% Solution of Hydrogen Peroxide in Spray Bottle

MONTHLY CLEANING

AIR FILTERS

■

should be cleaned once per month. Filt ers tha t 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 Replacement Component Division.

CLEANING THE INDOOR AIR FILTER

■

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.

or Soft Plastic Bristle Brush

Mild Household Detergent Phillips Head Screwdriver

/16-in. Nut Driver

Flat Head Screw Driver

Needle Nose Pliers, 90° Bend

Tank Sprayer (Part No. P9021001) or

Compressed Air Tank

Clean Water Supply

Indoor Air Filter Replacement

(Part No. AIR-FILTER-10PK)

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

Clean Cloth

Safety Glasses

Protective Gloves

— The indoor and vent air filters

— Two air

REPLACING THE INDOOR AIR FILT ER

■

— Remove the indoor air filter as detailed in Cleaning the Indoor Air Filter. If damaged, use a filter replacement 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 FIL TER —

■

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 e xterior 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 electrostatic charges on the plastic components of the PTAC unit.

Use a clean cloth or brush to gently wipe exterior s urfaces. Be careful not to push dirt or other fibers into the unit’s interior components. Accessible wall sleeve surfaces should also be wiped clean.

Page 11

SEASONAL CLEANING

VENT DOOR

OUTDOOR AIR FILTER

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

Coil fins are sharp and may cut hands. Wear heavy protective gloves when cleaning coils.

Use only cleaning solutions that meet local codes.

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 condenser 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 saturated. 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 process by carefully tilting the chassis. This allows excess water to flow out of the overflow notches.

Do not set unit on end to drain water from basepan, or at any other time. Oil will drain from the compressor sump, which could cause compressor failure.

6. Thoroughly clean t he base pan an d drain pa ssages by rinsing with clean water. Be sure all debris is removed from the drain valve. Se e Fig ure 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 condensat e drai n 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 cl oth to remov e

stubborn debris from surfaces around scroll and fan blades.

2. CLEAN HEATER ASSEMBLY — Use compressed 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.

FIGURE 21 — LOCATION OF

TWO-PIECE INDOOR FILTER

FIGURE 22 — LOCATION OF OUTDOOR AIR

VENT FILTER

Page 12

52C,P

SERIES

FIGURE 23 — PTAC EXTERIOR SURFACES

FIGURE 25 — CLEANING COILS

FIGURE 24 — VACUUMING EVAPORATOR

COIL

DRAIN VALVE

FIGURE 26 — BASEPAN SECTION

Page 13

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 supported by 2 bearings. Both the discharge valve and discharge muffler are attached to the motor bearing. The

DISCHARGE TUBE

SUCTION INLET

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 pressure and the vane spring keep the vane in contact with the rolling piston.

SHELL

STAT OR

SUCTION MUFFLER/ ACCUMULATOR

PISTON

VANE

OIL TUBE

ECCENTRIC SHAFT

ROTOR

MOTOR BEARING

DISCHARGE MUFFLER

DISCHARGE VALVE CYLINDER

PUMP BEARING

MOUNTING PLATE

FIGURE 27 — ROTARY COMPRESSOR COMPONENTS

Page 14

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 positio n A as shown in (2). The su ction 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 compressed 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. Continuous suction and discharge allows for a smooth compression process.

The rolling piston is not in actual contact with the cylinder wall, vane, or bearing faces. Hydrodynamic sealing prevents leakage from the compressed gas volume to the suction volume via these paths. Precise control of machining tolerances, surfaces, finishes, and assembly clearances is critical to achieve high efficiency performance. In addition, the line contact between the vane tip and the rolling piston requires careful selection and control of materials to provide wear resistance and reliable long-term operation.

BASIC HERMETIC COMPRESSOR ELECTRICAL MEASUREMENTS

There are 2 basic electrical te st s for herme tic compres sors that will determine the electrical state of the motor. The first test requires checking the electrical resistance of each of the electric al motor windin gs. 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 capacitor, the START wire (BLUE) from the capacitor. The third wi re, C OM M O N wire (YELLOW ) ma y 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 wi r e 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.

COMPRESSOR TROUBLESHOOTING

Refer to Figure 29 for a basic compressor troubleshooting chart.

FIGURE 28 — ROTARY COMPRESSOR

COMPRESSION PROCESS

For compressors that are known to be damaged: Remove refrigerant prior to disconnecting

compressor wires. Damaged hermetic compressor terminals may become loose a nd eject f rom the compressor. Wear safety glasses and keep your face away from the area above the terminals when removing compressor wires.

4. Perform a shorted/open windings test to measure the resistance between the windings of the compressor 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 overload 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.

Page 15

POSSIBLE CAUSE

COILS/FILTERS DIRTY OR PLUGGED AIR OR NONCONDENSABLE GASES

IN SYSTEM SYSTEM REFRIGERANT OVERCHARGED DISCHARGE LINE RESTRICTED CAPILLARY TUBE OR STRAINER

RESTRICTED OR PLUGGED FAN BLADE OR MOTOR DEFECTIVE FAN BLADE OR BLOWER WHEEL STUCK SYSTEM REFRIGERANT UNDERCHARGED EVAPORATOR AIRFLOW RECIRCULATION UNIT OVERSIZED FOR APPLICATION COMPRESSOR REQUIRES START ASSIST NO POWER TO UNIT LOW VOLTAGE TO UNIT OVERLOAD PROTECTOR OPEN OVERLOAD PROTECTOR INCORRECT

OR DEFECTIVE CAPACITOR INCORRECT OR DEFECTIVE THERMOSTAT CONTACTS ARE OPEN THERMOSTAT IS SET TOO HIGH OR LOW SELECTOR SWITCH IS OPEN

OR DEFECTIVE WIRING IS INCORRECT OR DEFECTIVE SYSTEM PRESSURES NOT EQUALIZED COMPRESSOR MOTOR OR

MECHANISM DEFECTIVE COMPRESSOR GROUNDED

SYMPTOM

Compressor

Starts and

Runs But

Cycles On the

Overload

X X XX

XX X

X X X X X X

XX X X

XXX

XX X X

XXXX

XX X XX

Compressor

Starts After Cycling the

Overload

Several Times

XX X

Compressor

Will Not

Start. It Hums

and Cycles On

the Overload

Compressor

Will Not Start

and Makes No

Noise

X X

Compressor

Cycles Off

(Not On

Overload)

X X

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 t he compres sor can prevent good contact between the probe and the metal. The paint should be removed from a small section of th e shell of the compressor to ensure good contact by the meter probe. The voltohmmeter 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 electrically failed and needs to be replaced. See the Compressor Replacement section for details.

COMPRESSOR REPLACEMENT

Before working on the compressor, read the instructions thoroughly and gather t he necessar y tools fo r the job. Review all safety information on unit and in literature. Always turn off all power to unit to avoid the possibility of electrical shock.

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 th e cor r ect to ol s for the jo b a nd that they are working properly and in good condition.

• Never replace a blown fuse without correcting the cause of the original fail u re. If thermally operated circuit breakers or overloads are tripping, make sure the trip is not due to excessi vely high temperatures 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.

Page 16

52C,P

SERIES

FIGURE 30 — SHORTED/OPEN WINDINGS TEST

FIGURE 31 — GROUNDED WINDINGS TEST

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 va lve to the suction side process tube below the crimps. Attach Carrier TOTALTEST® kit (Part No. TT1-001), to the piercing valve to verify acidity of the s ystem. After verifying the system acidity, remove the refrigerant 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 th e 3 wire s 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 tubing 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.

For compressors that are known to be damaged: Remove refrigerant prior to disconnecting

compressor wires. Damaged hermetic compressor terminals may become l oos e and eje ct f r om the compressor. Wear safety glasses and keep your face away from the area above the terminals when removing compressor wires.

TOOLS NEEDED

■

— The following list inclu des the recommended tools and devices for removing and replacing the compressor.

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

/2-in. Nut Driver

/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 To rch 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.

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 accumulator. There are several suction tube configura-

tions and the in-line filter drier will be field piped and brazed in to the su ction tube for your uni t. See Figure 33B for a general installation location.

11. Remove the grommets from the existing compressor and install them onto the new compressor.

Page 17

12. Install the new compressor and the new capillary

IN-LINE FILTER DRIER

COMPRESSOR

IN-LINE FILTER DRIER

COMPRESSOR

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 co re, then confi rm that no R-22 is leaking pa st 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, (leav e the pinch off tool in place until after the brazing process 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.

FIGURE 32 — STRAINER AND CAPILLARY TUBE LOCATION

IMPORTANT: The compressor should never be operated without 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.

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

Page 18

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 t he 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.

Before performing any cleaning, servicing, or maintenance to the unit, Disconnect All Power to avoid the possibility of electric shock and personal injury.

The manufacturer reserves the right to discontinue, or change at any time, specifications or desig ns without notice and without incurring obligations.

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

Page 19

TOOLS NEEDED

■

— The following list inclu des recommended tools and devi ces for worki ng on t he heater section of 52C,P units.

Phillips Head Screw Driver

Needle Nose Pliers

Volt-ohmmeter

Nut Driver

/16-in.

Perform the follo w in g ste ps to rem ove the Heater Assembly.

1. DISCONNECT ALL POWER TO UNIT.

2. Remove heater by follo wing 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 effici ency. 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 voltohmmeter 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 35 — HEATER COIL (Removed)

HEATER SIZE WATTS VOLTS

2.3 kW

3.4 kW

5.0 kW

2300 230 20-23 2300 265 28-31 3400 230 13-16 3400 265 19-21 5000 230 9-11 5000 265 13-15

FIGURE 36 — ACCEPTABLE HEATER

RESISTANCE VALUES

ACCEPTABLE RESISTANCE

(Ohms)

Page 20

52C,P

SERIES

OPERATING CONTROLS

UNIT-MOUNTED CONTROLS

The controls and components used in the 52C,P cooling 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. I t is a mecha n ica l dev i ce th at restricts the amount of rotation of the thermostat. The temperature limiter device may be adjusted by moving the plastic temperature selector tabs to another temperature 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 f an 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 electric heater and off when the thermostat is satisfied.

INDOOR THERMOSTAT

SELECT0R SWITCH

The 52C,P heat pump unit contains all the components 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 o utdoor ambient temperature. The unit automatically engages the electric heat strip and disables the compressor und er these conditions.

The outdoor frost t hermost at has a manual override to place the unit in electric heat mode operati on only . The override switch is located behind the front panel on the front side of the unit control box door.

IMPORTANT: Placing the override switch to electric 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.

The reversing valve allows for operation in reverse cycle heat pump mode. The valve is located in the piping system and is controlled by the reversing valv e solenoid coil. The coil is energized only during the heating mode.

TEMPERATURE LIMITER

CON

FAN CYCLE SWITCH

CYC

OUTDOOR FROST

THERMOSTAT

(HEAT PUMP

UNITS ONLY)

FIGURE 37 — 52C,P OPERATING CONTROLS

Page 21

WALL-MOUNTED THERMOSTAT

TYPICAL

WALL

THERMOSTAT

TERMINAL

BLOCK

CONTROLS

For 52C,P wall thermostat control (RC, RP) units, all controls are located on the wa ll-mounted

thermostat except the v ent lever and outdoor thermostat. 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 Figures 38-40. On remote control units, the fan cy cle function 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 defau lt is low spee d .

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).

IMPORTANT: No conversion kit is available to convert from an RC model back to an AA model.

FIGURE 38 — NON-PROGRAMMABLE

THERMOSTAT

FIGURE 39 — MANUAL THERMOSTAT

TERMINAL DESIGNATION

24 VAC

Fan

Compressor

Electric Heat

Reversing Valve

Common

NOTES:

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 connection between unit and digital thermostat.

FIGURE 41 — WIRING CONNECTIONS

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 connections at the thermostat terminal block. If connections are good and there is 2 4 VAC wit h no dis play, 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 control 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.)

TERMINAL

MODE

Fan Only Cooling Heating

Heat Pump Unit Heat/Cool Unit

*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 compressor or electric heat in the Heating mode.

FIGURE 42 — THERMOSTAT TROUBLESHOOTING

METER READINGS (VAC)

RGY W

24 24 0 0 0 24 24 24 0 24

24 24 24 0/24* 0 24 24 0 24 0

O (For

HP Only)

FIGURE 40 — PROGRAMMABLE THERMOSTAT

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.

Page 22

52C,P

SERIES

MASTER

PTAC

UNIT 1

UNIT 2

T’STAT

UNIT 3

NOTES:

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

2. Maximum of 4 PTAC units can be connected to one single 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.

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

TO ONE WALL THERMOSTAT

Page 23

DESCRIPTION OF SELECTOR SWITCH SETTINGS (Figure 44)

OFF MODE

■

operation.

FAN ONLY MODE

■

circulation without heating or cooling. Fan runs at high speed.

HIGH HEAT OR HIGH COOL MODE

■

selector and temperature control knobs to desired comfort 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

■

selector and temperature control knobs to desired comfort level. This function provides minimum heating or cooling with maximum dehumidification duri ng cooling. This setting also allows for very quiet fan operation.

FINDING TEMPERATURE SETTING FOR COM-

■

FORT LEVEL

Select High Heat, Low Heat or Cool position and allow unit to run for 15 to 30 minutes. If roo m is not co mfort able, turn knob setting slowly to change setting. When room is comfortable, keep control knob at that position.

— The OFF position terminates unit

— Use fan only position for air

— Position

— Set temperature knob in the middle.

NON-USER ADJUSTABLE CONTROLS

OUTSIDE OR VENT AIR

■

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 temperature setting is satisfied. This results in longer unit off-time and slightly larger variations in room temperature and humidity.

OUTDOOR THERMOSTAT (52CQ, PQ Units Only)

■

— The outdoor thermostat has 2 opera ting modes. The heat pump mode (selector screw set fully clockwise), allows the unit to operate normally in the reverse cycle mode. The electr i c hea t mo d e (s el ec t or scr e w se t fully counterclockwise), disables all compressor operating modes, both heating and cooling for units with mounted controls. For wall thermostat controlled models the compressor is only di sab le d i n hea t ing an d st il l allowed to run in cooling.

— Slide the vent lever to

TYPICAL 52C UNIT CONTROLS

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

WALL THERMOSTAT CONTROLS (Blank Plate )

TYPICAL 52C UNIT WITH

Page 24

52C,P

SERIES

SEQUENCE OF OPERATION

HEAT/COOL UNITS (Figure 45)

■

Fan Mode tacts L1 to HI and FCS1 to LS are made.

Cooling (Low) speed cooling contacts FCS2 to LO, COMP to FCS1, and COMP to IT3 are made.

Cooling (High) speed cool contacts FCS2 to HI, COMP to FCS1, and COMP to IT3 are made.

Heating (Low) speed heat conta cts FCS2 to LO, IT 1 to LS, L2 to HTR , and FCS1 to LS are made.

Heating (High) —

speed heat cont acts FCS2 to HI, IT1 to LS, L 2 to HT R, and FCS1 to LS are made.

SWITCH

POSITION

OFF FAN LO HEAT HI HEAT LO COOL HI COOL

FIGURE 45 — SELECTOR SWITCH CONTACTS,

COOLING ONLY UNITS (Figure 46)

■

Fan Mode (Low)

contact L1 to LO is made.

Fan Mode (High)

FAN contact L1 to HI is made.

Cooling (Low)

speed cooling contacts FCS to LO and L1 to IT3 are made.

Cooling (High)

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

OFF FAN L O FAN HI LO COOL HI COOL

FIGURE 46 — SELECTOR SWITCH CONTACTS,

HEAT PUMP UNITS (Figure 47)

■

Fan Mode

L1 to HI is made.

Cooling (Low)

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

— With the selector switch set to FAN con-

— With the selector switch set to low

— With the selector switch set to high

— With the selector switch set to lo w

With the selector switch set to high

CONTACTS MADE

NONE L1 TO HI, FCS1 TO LS FCS2 TO LO, IT1 TO LS, L2 TO HTR, FCS1 TO LS FCS2 TO HI, IT1 TO LS, L2 TO HTR, FCS1 TO LS FCS2 TO LO, COMP TO FCS1, COMP TO IT3 FCS2 TO HI, COMP TO FCS1, COMP TO IT3

ALL 52CE, PE ELECTRIC HEAT/COOL UNITS

—

With the selector switch set to FAN

—

With the selector switch set to

—

With the selector switch set to low

—

With the selector switch set to high

SWITCH

POSITION

CONTACTS MADE

NONE L1 TO LO L1 TO HI L1 TO IT3, FCS TO LO L1 TO IT3, FCS TO HI

ALL 52CE, PE COOLING ONLY UNITS

—

With the selector switch set to fan contact

—

With the selector switch set to low

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 contac ts L1 t o I T 1, FC S to LO an d L 2 to HT R a re 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 activated when the outdoor frost thermostat sensor detects a temperature below 20 F on the coil. At this point, the thermostat deenergizes the compres sor 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.

SWITCH

POSITION OFF FAN LO HEAT HI HEAT LO COOL HI COOL

NONE L1 TO HI L1 TO IT1, FCS TO LO, L2 TO HTR L1 TO IT1, FCS TO HI, L2 TO HTR L1 TO IT3, FCS TO LO L1 TO IT3, FCS TO HI

CONTACTS MADE

FIGURE 47 — SELECTOR SWITCH CONTACT,

ALL 52CQ, PQ HEAT PUMP UNITS

COMPONENT OPERATION AND TROUBLESHOOTING

TOOLS NEEDED

■

Volt-Ohmmeter

Flat and Phillips Screw Drivers

/16-in. Nut Driver

Side Cutting Pliers

Before cleaning, servicing, performing maintenance or removing the chassis from the wall sleeve, disconnect 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 maintenance tasks such as cleaning and replacing filters. Refer to UNIT DISASSEMBLY section of this manual for proper procedures to disconnect power to 52C,P units.

Page 25

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

Consider the following safety issues:

• Prior to performing any service or maintenance on electrical eq ui pment 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 clea n 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.

INDOOR THERMOSTAT (Heat/Cool and Cool Only

■

Units) (Figure 48) —

The thermostat maintains the selected temperature by cycli ng 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 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.

FIGURE 48 — INDOOR THERMOSTAT (IT)

CONTACTS, ALL 52CE, PE MODELS

LEGEND (Figures 48-50)

COMP — HTR — IT — OFT — OL — PLS — SLS —

Compressor Heater Indoor Thermostat Outdoor Frost Thermostat Overload Primary Limit Switch Secondary Limit Switch

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 verifying continuity of a closed switch, the ohm reading 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 p u mp 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, de pending on the difference between the actual room temperature and the thermostat temperature setting.

When the room temperature is more than 4 F cooler than the indoor thermostat setting, the second hea ting stage of the indoor thermostat engages the electric heat strip. This design feature allows the user to rapidly warm the room with the electric heat strip by turning the thermostat to its highest setting. When room temperatures appro ach the desired temperatu re, the user may adjust the thermostat to a personal comfort setting, which allows for normal heat pump operation.

NOTE: For outdoor coil temperatures below approximately 20 F, the outdoor frost thermostat prevents heat pump mode operation and immediately engages the electric heat strip upon a call for heating. The electric heat strip is NEVER energized at the same time as the compressor.

To verify operation of the heat pump indoor thermostat 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 terminal marked 3.

4. Adjust the thermostat up or down to verify the contacts of the switch open and close. When verifying 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 st age B contacts, place one lead of the continuity t ester 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.

Page 26

52C,P

SERIES

BLK

ORN

BLU

GRY

BRN

FIGURE 49 — INDOOR THERMOSTAT (IT)

CONTACTS, ALL 52CQ, PQ MODELS

OUTDOOR FROST THERMOSTAT (Heat Pump

■

Units) (Figure 50A and 50B) —

The Outdoor Frost Thermostat (OFT) is a thermostat that uses a singlepole switch with a manual override selector. The thermostat switches betwe en elect ric heat and co mpres sor 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.

IMPORTANT: Pla c ing th e over ri de sw it c h 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 swi tch

to electric heat mode operation on RC units will only disable the compressor in heating mode.

FIGURE 50A — OUTDOOR FROST THERMOSTAT

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

MOUNTED CONTROLS

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 locations to ease re-assembly.

3. Connect the continuity tester to the switch terminals marked 1 and 2.

4. Rotate the override switch to the electric heat setting and verify that there is continuity between terminals 1 and 2.

5. To check the other contacts, move the lead on terminal 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 operation. 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 manufacturer. If there are no visual signs of capacitor failure, 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 te rminal s on the dua l ca pacitor. 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 discharge. Repeat this process between the other group of terminals.

FIGURE 50B — OUTDOOR FROST THERMOSTAT

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

WALL THERMOSTAT CONTROL

Capacitors are capable of holding charge similar to a battery and may cause an electrical shock.

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.

Page 27

TEMPERATURE CONTROL STANDOFF PINS

FAN CYCLE SWITCH

OUTDOOR FROST THERMOSTAT (HEAT PUMP UNITS ONLY)

CON

CYC

SELECT0R SWITCH

OFT MOUNTING SCREWS

FIGURE 51 — CAPACITOR TEST

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 resistance. This indicates the capacitor is most likely good. If the reading goes to zero or a low resistance 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 according 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 continuity 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 th e volt-o hmmeter for 1X ohms a nd 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

■

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.

— To remove the indoor

7. Remove the 2 screws mounting the thermostat to the control box. Route thermostat bulb and capillary 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), perfor m th e fo ll ow in g ste ps :

1. Turn off unit power as described in UNIT DISASSEMBLY secti on.

2. Remove front panel.

3. Remove the 2 screws mounting the thermostat to the bottom of the control box. See Figure 53.

FIGURE 52 — FAN CYCLE SWITCH (3 Terminal)

FIGURE 53 — 52C,P OPERATING CONTROLS

Page 28

52C,P

SERIES

4. Remove the thermostat capillary from the outdoo r 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

■

the following steps:

1. Turn off unit power as descri b e d i n 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 —

■

located on the front of the control box. To remove the fan cycle switch, perform the following steps:

1. Turn off unit power as descri b e d i n 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 cycl e s witch. S ee 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.

To remove the capacitor, perform

—

The fan cycle switch is

SELECTOR SWITCH —

■

To remove the selector

switch from the unit, perform the following steps:

1. Turn off unit power as described in UNIT DISASSEMBLY secti on.

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.

CAPACITOR

OUTDOOR FROST THERMOSTAT

POWER CORD RIBBED WIRE (L2) TO CAPACITOR (C)

POWER CORD PLAIN WIRE (L1)

GROUND SCREW

FAN CYCLE SWITCH

INDOOR THERMOSTAT

TO ROTARY SWITCH

SELECTOR SWITCH

FIGURE 54 — COMPONENT LOCATIONS

IN OPEN CONTROL BOX

Page 29

FAN MOTOR

The fan motor is a permanent split capacitor (PSC) type motor. This motor is common in air-conditioning system appl icat io ns. A PSC moto r do es not req uire the use of a relay and always has a run capacitor connected between the run and start windings of the motor. See Figure 55.

The 52C,P series fan moto r has a motor shaf t 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 troubleshooting chart.

TOOLS NEEDED

■

ommended tools and devices for working on the fan motor of 52C,P units

Regular and Phillips Head Screw Drivers

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

FIGURE 55 — TWO-SPEED, PERMANENT

SPLIT CAPACITOR MOTOR (PSC)

— The following list includes rec-

Gloves

Safety Glasses

Small Adjustable Wrench

Channel Lock Pliers

Volt-ohmmeter

/16-in. Nut Driver

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. Us e a lifting device or ask for assistance if the unit must be moved.

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 resistance between the mot or windings. The second test requires checking t he electrical resistance b etween 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 secti on.

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. V alues 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 infinite. 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. A motor that has measurable resistance to ground is shorted to ground and must be replaced.

Page 30

52C,P

SERIES

POSSIBLE CAUSE

DEFECTIVE BEARING CAPACITOR DEFECTIVE SWITCH DEFECTIVE LOW LINE VOLTAGE SHORTED MOTOR WINDING NO POWER TO UNIT INTERNAL THERMOSTAT OPEN MISWIRED FAN STUCK BROKEN MOTOR WIRE MOTOR WINDING GROUNDED OPEN MOTOR WINDING

FIGURE 56 — FAN MOTOR TROUBLESHOOTING CHART

SYMPTOM

Motor Hums

But Does

Not Start

XXX XX

XXX XX X

XXX X X XXX X XX XXX X

Makes No Noise

and Does Not

Start

X X

Starts But Stops After Short Time

Starts

But Runs

Slow

Runs On

One Speed,

Not On Others

TYPICAL 208/230 VOLT MOTORS

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

CARRIER MOTOR PART NUMBER HC37GE237 HC37GE238

MANUFACTURER’S

PART NUMBER

MOTOR VOLTAGE

MOTOR HORSEPOWER

MOTOR SPEEDS

RESISTANCE (OHMS)

BLACK TO WHITE WIRE

RESISTANCE (OHMS)

BLACK TO BROWN WIRE

RESISTANCE (OHMS) BLACK TO RED WIRE

NOTE: Resistance values are approximate.

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

CARRIER MOTOR PART NUMBER HC29GE236 HC33GE239

MANUFACTURER’S

PART NUMBER

MOTOR VOLTAGE

MOTOR HORSEPOWER

MOTOR SPEEDS

RESISTANCE (OHMS)

BLACK TO WHITE WIRE

RESISTANCE (OHMS)

BLACK TO BROWN WIRE

RESISTANCE (OHMS) BLACK TO RED WIRE

NOTE: Resistance values are approximate.

5KCP29ECA299A 5KCP29ECA301

208/230 208/230

.075 .125

101.4 90

45.8 71

38.8 32.9

TYPICAL 265 VOLT MOTORS

5KCP29FCA315 5KCP29FCA316

265 265

.075 .125

144.0 83.7

29.3 39.1

82.1 45.2

FIGURE 57 — TYPICAL 52C,P FAN MOTORS

Page 31

FAN MOTOR REPLACEMENT

WIRING SCHEMATIC

POWER CORD

1. DISCONNECT ALL POWER TO UNIT.

2. Remove the unit from the sleeve as detailed i n the UNIT DISASSEMBLY section and place the unit on a large flat surface.

3. Remove the discharge deck and grille as det ailed 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.

Safety glasses should be worn to protect eyes in the event the spring clip breaks free from pliers.

5. Using adjustable pliers, carefully remove the

/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 partition 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 secti on.

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.

FIGURE 58 — LOCA TION OF WIRING SCHEMATIC

ON FRONT PANEL OF CONTROL BOX

Page 32

52C,P

SERIES

FIELD TEMPERATURE CHARTS

Refer to Figures 59-67 for field temperature data.

Outdoor Air Temperature (F) (40% RH)

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

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

50 60 70 80 90 100 110 120 130

Indoor Coil Delta Temperature (F)

Page 33

Outdoor Air Temperature (F) (40% RH)

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

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

50 60 70 80 90 100 110 120 130

Indoor Coil Delta Temperature (F)

Page 34

52C,P

SERIES

Outdoor Air Temperature (F) (40% RH)

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

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

50 60 70 80 90 100 110 120 130

Indoor Coil Delta Temperature (F)

Page 35

Outdoor Air Temperature (F) (40% RH)

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

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

50 60 70 80 90 100 110 120 130

Indoor Coil Delta Temperature (F)

Page 36

52C,P

SERIES

Outdoor Air Temperature (F) (40% RH)

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

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

Indoor Coil Delta Temperature (F)

Page 37

Outdoor Air Temperature (F) (40% RH)

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

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

50 60 70 80 90 100 110 120 130

Indoor Coil Delta Temperature (F)

Page 38

52C,P

SERIES

Indoor Air Temperature Rise (F)

208 V, 2.3 kW

208 V, 3.4 kW

Indoor Entering Air Temperature (F)

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

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

Page 39

Indoor Air Temperature Rise (F)

208 V, 2.3 kW

208 V, 3.4 kW

Indoor Entering Air Temperature (F)

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

208 V, 5.0 kW

230/265 V, 2.3 kW

230/265 V, 3.4 kW

230/265 V, 5.0 kW

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

Page 40

52C,P

SERIES

Indoor Air Temperature Rise (F)

7,000 Btu

9,000 Btu

Indoor Entering Air Temperature (F)

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

52P-12,000 Btu

52C-12,000 Btu

15,000 Btu

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

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

Page 41

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.

COMPONENT LEGEND

Component Connection (Marked)

Component Connection (Unmarked) Accessory or Optional Wiring

To Indicate Common Potential Only

CAP — COMP — FM — FCS — HTR — IT — NEC — OFT — OL — PLS — RVS — SLS — ST — SW —

Not To Represent Wire Capacitor Compressor Fan Motor Fan Cycle Switch Heater Indoor Thermostat National Electrical Code Outdoor Frost Thermostat Overload Primary Limit Switch Reversing Valve Solenoid Secondary Limit Switch Start Thermistor Switch

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. OFT determines whether to bring on compressor heat or electric heat.

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

STANDARD HEAT PUMP UNITS

Page 42

52C,P

SERIES

TYPICAL THERMOSTAT INTERFACE

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

‘G’ — 24 VAC ‘G’ — 0 VAC

‘Y’ — 24 VAC ‘O’ — 0 VAC

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

‘O’ — 24 VAC ‘R’ — 24 VAC

‘C’ — COMMON

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.

CAP — COMP — FM —

‘FR’ — LINE VAC ‘FR’ — 0 VAC

‘HR1 & HR2’ — LINE VAC ‘RVR’ — LINE VAC

‘CR’ — LINE VAC ‘RVR’ — 0 VAC

‘R’ — 24 VAC OUTPUT ‘C’ — COMMON

COMPONENT LEGEND

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

Capacitor Compressor Fan Motor

FA N

HEATING

COOLING

POWER TO WALL THERMOSTAT

HTR — IFT — NEC — OFT — OL — PCBD —

HR1 — HR2 — CR — FR —

RVR — PLS — RVS — SLS — SSS — ST — TRANS —

Heater Indoor Frost Thermostat National Electrical Code Outdoor Frost Thermostat Overload Printed Circuit Board Heater Relay Heater Relay Compressor Relay Fan Relay Reversing Valve Relay Primary Limit Switch Reversing Valve Solenoid Secondary Limit Switch Speed Selector Switch Start Thermistor Transformer

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

Page 43

COMPONENT LEGEND

Component Connection (Marked)

Component Connection (Unmarked) Accessory or Optional Wir ing

To Indicate Common Potential Only

CAP — COMP — FM — FCS — HTR — IT — NEC — OL — PLS — SLS — ST — SW —

Not To Represent Wire Capacitor Compressor Fan Mo to r Fan Cycle Switch Heater Indoor Thermostat National Electrical Code Overload Primary Limit Switch Secondary Limit Switch Start Thermistor Switch

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.

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

STANDARD HEAT/COOL UNITS

Page 44

52C,P

SERIES

CAP — COMP —

COMPONENT LEGEND

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

Capacitor Compressor

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

WALL THERMOSTAT CONTROL HEAT/COOL UNITS

FM — HTR — IFT — NEC — OL — PCBD —

HR1 — HR2 — CR —

FR — PLS — SLS — SSS — ST — TRANS —

Fan Motor Heater Indoor Frost Thermostat National Electrical Code Overload Printed Circuit Board Heater Relay Heater Relay Compressor Relay Fan Relay Primary Limit Switch Secondary Limit Switch Speed Selector Switch Start Thermistor Transformer

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.

Page 45

FIGURE 72 — 52PC — TYPICAL WIRING SCHEMATIC FOR

STAN DA R D CO OLING ONLY UNITS

Page 46

52C,P

SERIES

MOST FREQUENT PTAC SERVICE QUESTIONS

1. Can remote wall therm o s tat s be use d on standard (AA) models?

2. Which remote thermostats are acceptable for use on 52C,P products?

3. How many 52C,P series units can be controlled by one remote thermostat?

4. What is the vent capacity of the 52C,P products?

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

6. At what temperature will the outdoor (defrost) thermostat switch the unit (heat pumps only) into defrost (emergency heat) mode?

7. Can the PTAC unit be configured to allow continuous fan operation?

8. Can the discharge air grille be changed to alter the direction of the airflow?

9. What does the outdoor thermostat switch do?

No, only for use on remote control (RC,RP) models. However, accessory RC- Retrofit Ki t can be ordered to convert standard units to RC units.

HH01AD045 — Manual changeover thermostat TSTATCCBPC01-B (Heat/Cool) — Non-Progr ammable thermostat TSTATCCBPH01-B (Heat Pump) — Non-Programmable thermostat TSTATCCPAC01-B (Heat/Cool) — Digital Programmable thermostat TSTATCCPHP01-B (Heat Pump) — Digital Programmable thermostat

Maximum of 4. 50 cfm (standalone). Capacity can be increased with the

use of an external exhaust fan. 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 int o the condenser airstream where it will be blown onto the outdoor coil for evaporation.

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.

Yes. A switch located on the front of the control box is used to toggle between continuous or cycle fan mode.

Yes. Remove the 2 screws and flip the grille over 180 degrees.

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 p ump’’ position for compressor operation during cooling modes.

Page 47

ACCESSORIES

ACCESSORY FORM NUMBER PART NUMBER DESCRIPTION

Wall Sleeves

Exterior Grilles†

Subbase

Field-Installed

Kits

Electrical

Connections

Condensate

Drain Kit

Wall

Thermostats

Wall Thermostat

Interface

Retrofit Kit

Replacement

Filters

Energy

Management

Locking Security

Control Door

Lateral Duct Kit

Air/Curtain

Deflector

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

†Custom colors are also available.

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 11

sleeve. 1 per pack 52S-59SI GRILLE-ALU-STAMP Stamped Aluminum Exterior Grille, Clear Finish 52S-65SI GRILLE-PLA-BROWN Plastic Architectural Rear Grille, Brown

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

GRILLE-PLA-BEIGE Plastic Architectural Rear Grille, Beige

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 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 factor y-installed 265 V, 15 amp receptacle

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

SUBBASE-265V-30A Electrical subbase with factor y-installed 265 V, 30 amp receptacle 52C,P-3SI SUBBASE-HARDWIRE Electrical subbase with factory-installed hardwire kit (230/208 V and 265 V) 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

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

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

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

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

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

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

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

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

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

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

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

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)

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

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

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 (can be used to convert a cool only unit to RC).

RC unit. Wall thermostat sold separately.

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

RC unit. Wall thermostat sold separately.

non-programmable and electro-mechanical thermostats. Outside dimensions: 6 1 per pack

programmable thermostats. Outside dimensions: 7

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

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

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

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

″

deep (T Series) wall

″

x 7

″

x 9

″

x 3

. 1 per pack

″

x 2

Page 48

52C,P

SERIES

52C PERFORMANCE AND PHYSICAL DATA

CATALOG

NUMBER

52CE-207---3

52CE-307---3

52CE-209---3

52CE-309---3

52CE-212---3

52CE-312---3

52CE-512---3

52CE-215---3

52CE-315---3

52CE-515---3

52CE-207---4

52CE-307---4

52CE-209---4

52CE-309---4

52CE-212---4

52CE-312---4

52CE-512---4

52CE-215---4

52CE-315---4

52CE-515---4

COOLING

(Btuh)

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

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

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

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

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

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

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

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

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

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

7,000 11.1 7,800 —— 260 125 265 2.4 9.2 631 2396 15 26

7,000 11.1 11,600 —— 260 125 265 2.4 13.3 631 3496 20 26

8,900 10.7 7,800 —— 260 125 265 3.1 9.2 832 2396 15 24

8,900 10.7 11,600 —— 260 125 265 3.1 13.3 832 3496 20 24

12,000 10.1 7,800 —— 340 140 265 4.6 9.4 1188 2470 15 34

12,000 10.1 11,600 —— 340 140 265 4.6 13.5 1188 3570 20 34

12,000 10.1 17,000 —— 340 140 265 4.6 19.6 1188 5170 25 34

14,500 9.4 7,800 —— 340 150 265 6.0 9.7 1543 2517 15 36

14,500 9.4 11,600 —— 340 150 265 6.0 13.8 1543 3617 20 36

14,500 9.4 17,000 —— 340 150 265 6.0 19.9 1543 5217 25 36

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)

Cooling

Electric

Heat

Cooling

Electric

Heat

CIRCUIT FUSE

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

CATALOG

NUMBER

52CQ-207---3

52CQ-307---3

52CQ-209---3

52CQ-309---3

52CQ-212---3

52CQ-312---3

52CQ-512---3

52CQ-215---3

52CQ-315---3

52CQ-515---3

52CQ-207---4

52CQ-307---4

52CQ-209---4

52CQ-309---4

52CQ-212---4

52CQ-312---4

52CQ-512---4

52CQ-215---4

52CQ-315---4

52CQ-515---4

COOLING

(Btuh)

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

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

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

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

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

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

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

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

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

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

7,000 11.1 7,800 3.1 6,100 260 125 265 2.4 9.2 631 2396 15 26

7,000 11.1 11,600 3.1 6,100 260 125 265 2.4 13.3 631 3496 20 26

8,900 10.7 7,800 3.1 7,700 260 125 265 3.1 9.2 832 2396 15 24

8,900 10.7 11,600 3.1 7,700 260 125 265 3.1 13.3 832 3496 20 24

12,000 10.1 7,800 3.0 10,800 340 140 265 4.5 9.4 1188 2470 15 34

12,000 10.1 11,600 3.0 10,800 340 140 265 4.5 13.5 1188 3570 20 34

12,000 10.1 17,000 3.0 10,800 340 140 265 4.5 19.6 1188 5170 25 34

14,500 9.4 7,800 2.9 13,400 340 150 265 6.0 9.7 1543 2517 15 36

14,500 9.4 11,600 2.9 13,400 340 150 265 6.0 13.8 1543 3617 20 36

14,500 9.4 17,000 2.9 13,400 340 150 265 6.0 19.9 1543 5217 25 36

EER

ELECTRIC

HEAT (Btuh)

COP

REVERSE

CYCLE

HEAT (Btuh)

EVAP. FAN

CFM

(HI-SPEED)

APPROX.

WEIGHT

(SHIP)

1-PH, 60 Hz

CURRENT (AMPS) INPUT POWER (WATTS)

Cooling

Electric

Heat

VOLTS

Cooling

Electric

Heat

CIRCUIT FUSE

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

BRANCH

(AMPS)

BRANCH

(AMPS)

R-22

CHARGE

(oz)

R-22

CHARGE

(oz)

Page 49

52P PERFORMANCE AND PHYSICAL DATA

CATALOG

NUMBER

52PE-207---3

52PE-307---3

52PE-209---3

52PE-309---3

52PE-212---3

52PE-312---3

52PE-512---3

52PE-215---3

52PE-315---3

52PE-515---3

52PE-207---4

52PE-307---4

52PE-209---4

52PE-309---4

52PE-212---4

52PE-312---4

52PE-512---4

52PE-215---4

52PE-315---4

52PE-515---4

COOLING

(Btuh)

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

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

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

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

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

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

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

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

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

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

7,200 12.7 7,800 —— 260 125 265 2.4 9.2 567 2396 15 26

7,200 12.7 11,600 —— 260 125 265 2.4 13.3 567 3496 20 26

9,100 11.5 7,800 —— 260 125 265 3.1 9.2 791 2396 15 24

9,100 11.5 11,600 —— 260 125 265 3.1 13.3 791 3496 20 24

12,100 11.1 7,800 —— 340 140 265 4.2 9.4 1090 2470 15 34

12,100 11.1 11,600 —— 340 140 265 4.2 13.5 1090 3570 20 34

12,100 11.1 17,000 —— 340 140 265 4.2 19.6 1090 5170 25 34

14,500 9.4 7,800 —— 340 150 265 6.0 9.7 1543 2517 15 36

14,500 9.4 11,600 —— 340 150 265 6.0 13.8 1543 3617 20 36

14,500 9.4 17,000 —— 340 150 265 6.0 19.9 1543 5217 25 36

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)

Cooling

Electric

Heat

Cooling

Electric

Heat

CIRCUIT FUSE

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

CATALOG

NUMBER

52PQ-207---3

52PQ-307---3

52PQ-209---3

52PQ-309---3

52PQ-212---3

52PQ-312---3

52PQ-512---3

52PQ-215---3

52PQ-315---3

52PQ-515---3

52PQ-207---4

52PQ-307---4

52PQ-209---4

52PQ-309---4

52PQ-212---4

52PQ-312---4

52PQ-512---4

52PQ-215---4

52PQ-315---4

52PQ-515---4

COOLING

(Btuh)

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

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

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

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

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

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

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

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

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

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

7,200 12.7 7,800 3.4 6,300 260 125 265 2.4 9.2 567 2396 15 26

7,200 12.7 11,600 3.4 6,300 260 125 265 2.4 13.3 567 3496 20 26

9,100 11.5 7,800 3.2 7,700 260 125 265 3.1 9.2 791 2396 15 24

9,100 11.5 11,600 3.2 7,700 260 125 265 3.1 13.3 791 3496 20 24

12,100 11.1 7,800 3.2 10,800 340 140 265 4.2 9.4 1090 2470 15 34

12,100 11.1 11,600 3.2 10,800 340 140 265 4.2 13.5 1090 3570 20 34

12,100 11.1 17,000 3.2 10,800 340 140 265 4.2 19.6 1090 5170 25 34

14,500 9.4 7,800 2.9 13,400 340 150 265 6.0 9.7 1543 2517 15 36

14,500 9.4 11,600 2.9 13,400 340 150 265 6.0 13.8 1543 3617 20 36

14,500 9.4 17,000 2.9 13,400 340 150 265 6.0 19.9 1543 5217 25 36

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)

Cooling

Electric

Heat

Cooling

Electric

Heat

CIRCUIT FUSE

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

BRANCH

(AMPS)

BRANCH

(AMPS)

R-22

CHARGE

(oz)

R-22

CHARGE

(oz)

Page 50

Page 51

Page 52

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

Book 1 4 Tab 9a 11a

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

Carrier 52C, 52P User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual