Carrier P, 52CE Series, 52CQ Series, 52PE Series, 52PQ Series User Manual

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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 (UNITS WITH LATERAL

DUCT ACCESSORY). . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

ACCESSING INDOOR-AIR SECTION COMPONENTS (UNI TS WIT HOU T L ATERAL

DUCT ACCESSORY). . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

ACCESSING OUTDOOR-AIR SECTION

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

GENERAL CLEANING

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

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

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

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

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

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

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

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

Page

COMPRESSOR

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

BASIC HERMETIC COMPRESSOR

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

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

HEATERS

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

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

OPERATING CONTROLS

DESCRIPTION OF SELECTOR

SWITCH SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . .22

NON-USER ADJUSTABLE CONTROLS . . . . . . . . . .22

SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . .23

COMPONENT OPERATION AND

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . .23

ELECTRICAL COMPONENTS REMOVAL

AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . .26

FAN MOTOR

FAN MOTOR TROUBLESHOOTING. . . . . . . . . . . . .28

BASIC FAN MOTOR ELECTRICAL TESTS. . . . . . . . 28

FAN MOTOR REPLACEMENT. . . . . . . . . . . . . . . . . .30

WIRING DIAGRAMS MOST FREQUENT PTAC SERVICE

QUESTIONS ACCESSORIES

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

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

. . . . . . . . . . . . . . . . . . . . . 20-27

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-30

. . . . . . . . . . . . . . . . . . . . . . . . 31-35

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

PTAC Customer Support Center

1•800•894•6449

Page

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 1100/1100 EER 11.0/10.9

MOTOR

FAN

COMP

FLA

RLA LRA

6.1 29

0.75 1/8

BTU/HR 10,800/10,700 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 cooling with electric heat and heat

52PE — 60 Hz cooling with electric heat units 52PQ — 60 Hz cooling with electric heat and heat

52PC — 60 Hz cooling only units Knowing which model is being serviced will help deter-

mine if the unit is performing at optimum levels. The model number is located on the data 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.

pump units

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

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

FIGURE 1 — SAMPLE DATA INFORMATION PLATE

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

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 firmly ne ar bottom of both sides.

2. Pull the panel forward then upward 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 disconne ct swit c h a t ma in po wer su pply. 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 disconne ct swit c h a t ma in po wer su pply. 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.

REMOVE FRONT PANEL

NOTE: Before removing front panel, remove 2 locking screws (if installed) located behind the filter handles.

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

Replacement Package Terminal Air Conditioner, CLASSIFIED BY UNDERWRITERS LABORATORIES INC., AS TO ELECTRIC SHOCK, FIRE AND CASUALTY HAZARDS ONLY. FOR FIELD INSTALLATION WITH EXISTING WALL SLEEVES, OUTDOOR, LOUVERS, AND INDOOR PANELS AS SPECIFIED 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

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 (UNITS WITH LA TERAL DUCT ACCESSORY)

REMOVE LATERAL DUCT EXTENSION

■

ACCESSORY ONLY ON 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

ACCESSING INDOOR-AIR SECTION COMPONENTS (UNITS WITHOUT LATERAL DUCT ACCESSORY)

REMOVE THE DISCHARGE DECK ASSEMBLY

■

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

2. Remove discharge screen screw using a

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 brac ket flange. See Figure 8.

panel and duct extension.

Panel section and Figure 4. driver. See Figure 9.

/16-in. nut

3. Remove th e disch arge dec k asse mbly scre ws usin g

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

4. Gently pull the deck/grille up and away f rom the unit.

5. Reassemble by reversing steps above.

ACCESSING THE HEATER ASSEMBLY

■

— Once the discharge deck assembly is removed, the Heater Assembly should now be accessible. See Figure 10.

1. Using pliers, carefully remove all wires connected to the heater 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.

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

HEATER ASSEMBLY

FIGURE 10 — ACCESSING HEATER

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

removing 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 panel 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.

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

52C,P

SERIES

OUTDOOR COIL TUBE SHEET SCREWS

FIGURE 16 — LOCATION OF OUTDOOR

COIL TUBE SHEET SCREWS

CONDENSER FAN

HUB CLAMP

FIGURE 18 — REMOVING CONDENSER

FAN HUB CLAMP

CONTROL DOOR HINGE PINS

FRONT PANEL (BACK VIEW)

SCREW SCREW

DISCHARGE GRILLE

FIGURE 19 — LOCATION OF SCREWS ON

DISCHARGE GRILLE

FIGURE 17 — REMOVING OUTDOOR COIL

FROM CONDENSER FAN

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)

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. F ilt ers that are not cleaned become clogged and will restrict airflow. This may lead to major component damage. If a filter becomes torn, has holes, or other damage, replace it with a new one. Replacement filters are available through Carrier Finished Goods and Carrier 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-10PAK)

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 FILTER

■

—

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 needle nose pliers, remove vent cable from vent door.

4. Using a small flat head screwdriver, pry the filter from the partition.

5. Replace vent filter using Carrier Part No. 52CQ500144.

6. Reverse Steps 1-4 to re attach vent door and cable.

■

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.

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.

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

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 cl ean the b asepan a nd drain p assages by rinsing with clean water. Be sure all debris is removed from the drain valve. See Figure 26.

7. Thoroughly cle an 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.

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.

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

52C,P

SERIES

FIGURE 23 — PTAC EXTERIOR SURFACES

FIGURE 25 — CLEANING COILS

FIGURE 24 — VACUUMING EVAPORATOR COIL

DRAIN VALVE

FIGURE 26 — BASEPAN SECTION

COMPRESSOR

A cutaway view of the rotary compressor with key components labeled is shown in Figure 27. The motor stator is rigidly attached to the compressor shell. The rotor is pressed onto the eccentric shaft, which is 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

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

3. Open the control box as detailed in the

DISASSEMBLY

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 wire, COMMON wire (YELLOW) may be connected to one of the following locations:

PC units for CE, PE Remote Control Units

on the RC Control Board,

Units

switch. outdoor frost thermostat.

the wire is located on the rotary selector

For ALL CQ, PQ Units

UNIT DISASSEMBLY

section, then locate, label, and

the wire is on the indoor thermostat,

for all other CE, PE

section.

UNIT

the wire is

the wire is on the

for

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.

POSSIBLE CAUSE SYMPTOM

COILS/FILTERS DIRTY OR PLUGGED AIR OR NONCONDENSABLE GASES

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

OVERLOAD PROTECTOR OPEN

OVERLOAD PROTECTOR INCORRECT

CAPACITOR INCORRECT OR DEFECTIVE

THERMOSTAT CONTACTS ARE OPEN

THERMOSTAT IS SET TOO HIGH OR LOW

SELECTOR SWITCH IS OPEN

WIRING IS INCORRECT OR DEFECTIVE SYSTEM PRESSURES NOT EQUALIZED

COMPRESSOR MOTOR OR

COMPRESSOR GROUNDED

IN SYSTEM

NO POWER TO UNIT

LOW VOLTAGE TO UNIT

OR DEFECTIVE

MECHANISM DEFECTIVE

COMPRESSOR

STARTS AND

RUNS BUT

CYCLES ON THE

OVERL OAD

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 the compressor 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.

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.

If the unit is a heat pump:

Disconnect the wire plug on the reversing valve solenoid and carefully remove the outdoor thermostat capillary from the outdoor coil. See Figure 32.

4. Attach the piercing valve to the suction side 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 the 3 wires from the compressor and label the location of each. Once the wires are labeled, replace the terminal cover to protect the compressor terminals.

6. Remove the air system components by following the procedure detailed in the

COMPONENTS

section

ACCESSING UNIT

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 TOTALTESTT Kit (Part No. TT1-001) Totalclaim® System Charging Cylinder or an Electronic Scale Refrigerant-22 Tubing Cutter To rch Nitrogen Cylinder with Regulator Stainers 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.

F or all units:

Remove and replace the strainer and capillary tubes from the system. See Figure 32 for strainer and capillary tube location.

For Heat/Cool Units:

10.

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.

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.

For Heat Pump Units:

15.

Recharge unit to the nameplate refrigerant charge using a charging cylinder.

16. Pinch off each access valve o n the process t ubes , in 2 places, using a pinch off tool such as Imperial tool #105-FF or Robinair Tool #12294. Release any refrigerant pressure trapped in the access valve by depressing the valve core, then confirm that no R-22 is leaking past the pinch off tool location. Cut the access valve stem of the process tube above the top crimp and braze the top o f each process tube to ensure the system is sealed, (leave the pinch off tool in p lace 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

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

TOOLS NEEDED

■

—

The following list includes 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)

52C,P

SERIES

OPERATING 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.

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.

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 outdoor ambient temperature. The unit automatically engages the electric heat strip under these conditions.

The outdoor fros t thermo stat has a manual overr ide to place the unit in electri c heat mode operation only. The override switch is located behin d the front pa n el on the front side of the unit control box door.

See Figures 40 and 41 for control wiring. See Figure 42 for unit control panel examples.

FIGURE 37 — NON-PROGRA MMABLE

THERMOSTAT

FIGURE 38 — MANUAL THERMOSTAT

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.

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

For 52C,P remote control (RC, RP) units, all controls are located on the wall-mounted thermostat except the vent 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 37-39. For all other 52C,P units, room controls are located on the unit control panel. On remote control units, the fan cycle function is located on the wall thermostat. The rocker switch on control box door is used to set fan speed to high or low. Factory default is low.

FIGURE 39 — PROGRAMMABLE THERMOSTAT

TYPICAL

WALL

THERMOSTAT

TERMINAL

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 allowed. There must always be a hard common connection between unit and digital thermostat.

BLOCK

FIGURE 40 — WIRING CONNEC TIONS

MASTER

PTAC

T’STAT

UNIT 1

UNIT 2

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 41 — TYPICAL WIRING FOR MULTIPLE 52C PTAC UNITS CONNECTED TO 1 WALL THERMOSTAT

52C,P

SERIES

DESCRIPTION OF SELECTOR SWITCH SETTINGS (Figure 42)

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 roo m 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 room is not comfortable, 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

—

Position

—

Set temperatu re 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

■

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 offtime and slightly larger variations in room temperature and humidity.

OUTDOOR THERMOSTAT (52CQ, PQ Units Only)

■

—

The outdoor thermostat has 2 operating mode s. The heat pump mode (selector screw set fully clockwise), allows the unit to opera te normally in the re verse cycle mode. The electri c heat mode (selector screw set fu lly counterclockwise), disables all modes, both heating and cooling for units with mounted controls. For wall thermostat controlled models the compressor is only disabled in heating and still allowed to run in cooling.

—

The fan cycle switch allows the fan

—

Slide the vent lever to

compressor

operating

TYPICAL 52C UNIT CONTROLS

FIGURE 42 — TYPICAL CONTROL PANEL (52C Unit Shown)

WALL THERMOSTAT CONTROLS (Blank Plate )

TYPICAL 52C UNIT WITH

SEQUENCE OF OPERATION

HEAT/COOL UNITS (Figure 43)

■

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 contacts FCS2 to LO, IT1 to LS, L2 to HTR, and FCS1 to LS are made.

Heating (High) —

speed heat c o nta ct s FC S2 to H I , I T 1 to LS, L2 to HTR , and FCS1 to LS are made.

SWITCH

POSITION

OFF FAN LO HEAT HI HEAT LO COOL HI COOL

FIGURE 43 — SELECTOR SWITCH CONTACTS,

—

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 low

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

Heating (Low)

—

With the selector switch set to low heat contacts L1 to IT1, FCS to LO and L2 to HTR are made.

Heating (High)

—

With the selector switch set to high heat contacts L1 to IT1, FCS to HI, and L2 to HTR are made.

Defrost Cycle

—

When heat pump unit is operating in reverse cycle, the outdoor coil may begin to frost. As frost accumulates on the outdoor coil the unit may switch into defrost mode. The defrost mode is activated when the outdoor frost thermostat sensor detects a temperature below 20 F on the coil. At this point, the thermostat deenergizes the compressor and activates the electric heat. The unit will remain in electric heat mode until the outdoor thermostat senses 35 F coil temperature. The defrost mode is a passive operation and may take some time before the coil defrosts.

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 45 — SELECTOR SWITCH CONTACT,

ALL 52CQ, PQ HEAT PUMP UNITS

COOLING ONLY UNITS (Figure 44)

■

Fan Mode

—

With the selector switch set to FAN con-

tact L1 to LO is made.

Cooling (Low)

—

With the selector switch set to low speed cooling contacts FCS to LO and L1 to IT3 are made.

Cooling (High)

—

With the selector switch set to high

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

SWITCH

POSITION OFF FAN L O FAN HI LO COOL HI COOL

CONTACTS MADE

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

FIGURE 44 — SELECTOR SWITCH CONTACTS,

ALL 52CE, PE COOLING ONLY UNITS

HEAT PUMP UNITS (Figure 45)

■

Fan Mode

—

With the se lector switc h set to fan c ontact

L1 to HI is made.

Cooling (Low)

—

With the selector switch set to low

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

Cooling (High)

—

With the selector switch set to high

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

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.

52C,P

SERIES

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 shoul d be clean and free of debris.

• Make sure tools are the correct tools for job, and that they are working properly and in good condition.

• The 52C,P unit may weigh up to 150 pounds. Use a lifting device or ask for assistance if the unit must be moved.

INDOOR THERMOSTAT (Heat/Cool and Cool Only

■

Units) (Figure 46) —

The thermostat maintains the selected temperature by cycl ing the compressor on and off during cooling operat ion 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 thermos tat switch , a continuity test may be performed as follows:

1. Turn off unit power as descri b e d i n UNIT DISASSEMBLY section.

2. Remove wire leads from thermostat. Note their locations to ease re-assembly.

FIGURE 46 — INDOOR THERMOSTAT (IT)

CONTACTS, ALL 52CE, PE MODELS

LEGEND (Figures 46-48)

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

Compressor Heater Indoor Fan 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 ing should be 0 ohms. An

closed

switch, the ohm read-

open

switch will show

OL on the meter.

5. When testing is complete, reconnect the leads .

INDOOR THERMOSTAT (Heat Pump Units)

■

(Figure 47) —

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, depending 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 t he 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 25 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 th e 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 t erminal marked 3.

4. Adjust the thermostat up or down to verify the contacts of the switch open and close. When verifying continuity of the on the meter should be 0 ohms. An

closed

switch, the reading

open

switch

will show OL on the meter.

5. To test stage B contacts, place one lead of the continuity tester on contact 5 and the other lead on either contact 4 or contact 6.

6. Adjust the thermostat up or down to verify the contacts of the switch open and close as in Step 4.

7. When testing is complete, reconnect the leads .

BLK

ORN

BLU

GRY

BRN

FIGURE 47 — INDOOR THERMOSTAT (IT)

CONTACTS, ALL 52CQ, PQ MODELS

OUTDOOR FROST THERMOSTAT (Heat Pump

■

Units) (Figure 48A and 48B) —

The Outdoor Frost Thermostat (OFT) is a thermostat that uses a singlepole switch with a manual override selector. The thermostat swit che s bet w ee n el ect r ic h e at and co mp res 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 thermos ta t and is manually switched to electric heat operation.

IMPORTANT: Pla cin g the ove rr id e swit c h to el ectric 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 mod e operation on RC units will only disable the compressor in heating mode.

FIGURE 48A — 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.

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

FIGURE 48B — OUTDOOR FROST THERMOSTAT

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

WALL THERMOSTAT CONTROL

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 49.

52C,P

SERIES

FIGURE 49 — 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 —

■

2 operating modes, cont inuous (CON) and cycle (CY C). To verify the fan cycle switch is oper ational, a continuity test may be performed as follows:

1. Turn off unit power as descri b e d i n UNIT DISASSEMBLY section.

2. Label and remove the leads connected to fan cycle switch. See Figure 50.

3. Connect the volt -ohmmeter for 1X o hms and c heck 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.

The fan cycle switch has

7. Remove the 2 screws mounting the thermostat to the control box. Route thermostat bulb and cap illary 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 llo w 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 51.

FIGURE 50 — FAN CYCLE SWITCH (3 Terminal)

SELECT0R SWITCH

TEMPERATURE CONTROL STANDOFF PINS

FAN CYCLE SWITCH

CON

CYC

ELECTRICAL COMPONENTS REMOVAL AND REPLACEMENT

INDOOR THERMOSTAT

■

thermostat, perform the following steps:

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

DISASSEMBLY

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

section of this manual.

UNIT

OFT MOUNTING SCREWS

OUTDOOR THERMOSTAT (HEAT PUMP UNITS ONLY)

FIGURE 51 — 52C,P OPERATING CONTROLS

4. Remove the thermostat ca pillary from t he outdoor

PLAIN WIRE (L1) TO ROTARY SWITCH

GROUND SCREW

FAN CYCLE SWITCH

INDOOR THERMOSTAT

SELECTOR SWITCH

CAPACITOR

OUTDOOR FROST THERMOSTAT

RIBBED WIRE (L2) TO CAPACITOR (C)

POWER CORD

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

■

—

T o remove the capacitor, perform

the following steps:

1. Turn off unit power as described in UNIT DISASSEMBLY section.

2. Open the control box as detailed in the

DISASSEMBLY

section of this manual.

UNIT

3. Properly discharge the capacitor as described in the Capacitor section under

Component Opera-

tion and Troubleshooting.

4. Remove the leads to the capacitor. Note the wire locations to ease re-assembly.

5. Remove the screw holding the capacitor.

6. Remove capacitor.

7. Reverse Steps 1-6 to reinstall.

FAN CYCLE SWITCH —

■

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

1. Turn off unit power as described in UNIT DISASSEMBLY section.

2. Open the control box as described in

DISASSEMBLY

section of this manual.

UNIT

3. Remove the 3 wires from the fan cycl e swit ch . See Figure 52 for location, noting location of wires for re-assembly.

4. Push the snaps of the switch housing toward the switch with a pair of pliers or small screwdriver. Gently push the switch out of the housing.

5. Reverse Steps 1-4 to reinstall.

SELECTOR SWITCH —

■

T o 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 51.

3. Open control box as described in the

DISASSEMBLY

section of this manual.

UNIT

4. Remove all the wires to the selector switch. Label wires to simplify re-assembly. See Figure 52.

5. Remove the 2 screws mounting the switch and remove switch.

6. Reverse Steps 1-5 to reinstall.

FIGURE 52 — COMPONENT LOCATIONS

IN OPEN CONTROL BOX

52C,P

SERIES

FAN MOTOR

The fan motor is a permanent split capacitor (PSC) type motor. This motor is common in air-conditioning system applicatio ns. A PSC mo tor do es not requi re the use of a relay and always has a run capacitor connected between the run and start windings of the motor. See Figure 53.

The 52C,P series fan moto r has a motor shaft ex tended through both ends. It powers both the indoor and the outdoor fans. It has permanently sealed bearings that require no lubricati on. 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 54 for a basic fan motor troubleshooting chart.

TOOLS NEEDED

■

mended tools and de vices for working on the fa n motor of 52C,P units.

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 perfor m 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.

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

Regular and Phillips Head Screw Drivers

FIGURE 53 — TWO-SPEED, PERMANENT

SPLIT CAPACITOR MOTOR (PSC)

—

The following list includes recom-

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 motor windings. The second test requires checking t he electrical resistan ce between the motor windings and ground. These tests may be accomplished by performing the following steps:

1. DISCONNECT ALL POWER TO UNIT.

2. Open the control box as detailed in the

DISASSEMBLY

3. Label and disconnect the fan motor wires from the selector switch and capacitor as shown in Figure 52. 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 55 for typical motor winding resistance measurements. The resistance values in the table are approximate. Values that are within 10% of those listed are acceptable. If the motor in your model is not listed, find a motor of similar horsepower an d 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 unt il the motor cools. A motor that has measurable resistance to ground is shorted to ground and must be replaced.

section.

UNIT

POSSIBLE CAUSE SYMPTOM

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 54 — FAN MOTOR TROUBLESHOOTING CHART

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.

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

5KCP29ECA299A 5KCP29ECA301

208/230 208/230

.075 .125

101.4 90

45.8 71

38.8 32.9

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

CARRIER MOTOR PART NUMBER HC29GE236 HC33GE239

MANUFACTURER’S

PART NUMBER

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.

TYPICAL 265 VOLT MOTORS

5KCP29FCA315 5KCP29FCA316

265 265

.075 .125

144.0 83.7

29.3 39.1

82.1 45.2

FIGURE 55 — TYPICAL 52C,P FAN MOTORS

52C,P

SERIES

FAN MOTOR REPLACEMENT

1. DISCONNECT ALL POWER TO UNIT.

2. Remove the unit from the sleeve as detailed i n the

UNIT DISASSEMBLY

on a large flat surface.

3. Remove the discharge deck and grille as detailed in Remove The Discharge Deck Assembly section.

4. Remove heater plate assembly as detailed in Accessing The Heater Assembly section. The blower wheel should now be accessible.

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 spring clip that secures the blower wheel to the fan shaft. Remove the blower wheel.

6. Open the Control box as described in the

DISASSEMBLY 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 56.

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.

section,

section and place the unit

UNIT

Open the Control

9. Remove the top half of the condenser orifice as detailed in Detach the Condenser Orifice From the Condenser Coil section.

10. Using a Phillips head screwdriver, remove the fan motor shield. The fan motor mounting screws should now be accessible. Remove the 3 mounting screws that secure the fan motor to the partition 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.

POWER CORD

FIGURE 56 — LOCA TION OF WIRING SCHEMATIC

ON FRONT PANEL OF CONTROL BOX

WIRING SCHEMATIC

WIRING DIAGRAMS

Refer to Figures 57-61 for Typical Wiring Schematics.

NOTE: Figures 57-61 should not be substituted for the schematic located on control box.

FIGURE 57 — 52CQ — TYPICAL WIRING SCHEMATIC FOR STANDARD HEAT PUMP UNITS

52C,P

SERIES

FIGURE 58 — 52CQ — TYPICAL WIRING SCHEMATIC FOR

WALL THERMOSTAT CONTROL HEAT PUMP UNITS

FIGURE 59 — 52CE — TYPICAL WIRING SCHEMATIC FOR STANDARD HEAT/COOL UNITS

52C,P

SERIES

FIGURE 60 — 52CE — TYPICAL WIRING SCHEMATIC FOR

WALL THERMOSTAT CONTROL HEAT/COOL UNITS

FIGURE 61 — 52PC — TYPICAL WIRING SCHEMATIC FOR

STAN DA R D CO OLING ONLY UNITS

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

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

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

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

7. Can the PTAC unit be configured to allow continuous

8. Can the discharge air grille be changed to alter the

9. What does the outdoor thermostat switch do?

thermostat switch the unit (heat

direction of the airflow?

remote thermostat?

removal?

fan operation?

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.

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

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-12SI FR-SLEEVE-EXT Friedrich wall sleeve extension to retrofit Carrier PTAC unit into Friedrich 11

52S-59SI GRILLE-ALU-STAMP Stamped Aluminum Exterior Grille, Clear Finish 52S-58SI GRILLE-PLA-BROWN Plastic Architectural Rear Grille, Brown

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

52C,P-1SI SUBBASE-NON-ELEC Non-electrical Subbase 52C,P-2SI SUBBASE-230V-15A Electrical subbase with factor y-installed 208/230V, 15 amp receptacle

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

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-7SI RC-FIELDKIT230HC Field-installed wall thermostat retrofit kit to convert a standard 230V 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

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

52C,P-10SI EM-KIT Allows unit to be turned on and off from a remote location (includes freeze guard protection)

52C,P-13SI 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 cur tains from blowing into discharge air stream.

WALL-SLEEVE-9PK Non-Insulated Plastic Wall Sleeve, 9 per pack SLEEVE-INSUL-1PK Insulated Plastic Wall Sleeve, 1 per pack

sleeve. 1 per pack

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

SUBBASE-230V-20A Electrical subbase with factor y-installed 208/230V, 20 amp receptacle SUBBASE-230V-30A Electrical subbase with factor y-installed 208/230V, 30 amp receptacle SUBBASE-265V-15A Electrical subbase with factor y-installed 265V, 15 amp receptacle SUBBASE-265V-20A Electrical subbase with factor y-installed 265V, 20 amp receptacle SUBBASE-265V-30A Electrical subbase with factor y-installed 265V, 30 amp receptacle

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

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

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 230V Heat Pump unit to an

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

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

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

/4" x 93/4" x 33/8". 1 per pack

/2" deep (T Series) wall

/2" x 71/2" x 215/16".

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. 535-20019 Printed in U.S.A. Form 52C,P-1SM Pg 40 1-02 Replaces: New

Carrier P, 52CE Series, 52CQ Series, 52PE Series, 52PQ Series User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual