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Carrier 52C, P FIGURE 71 52CE AND 52PE TYPICAL WIRING SCHEMATIC FOR WALL THERMOSTAT CONTROL HEAT/COOL UNITS

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52C,P

SERIES

44

FIGURE 71 — 52CE AND 52PE — TYPICAL WIRING SCHEMATIC FOR WALL THERMOSTAT CONTROL HEAT/COOL UNITS

NOTES:

1. Recommended for use on grounded power supply only.

2. Compressor and fan motor thermally protected.

3. Use copper conductors only.

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

5. Dashed lines indicate components when used.

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

24 volts.

Component Connection (Marked)

Component Connection (Unmarked)

Terminal Board Connection

Field Splice

Field Control Wiring

Accessory or Optional Wiring

To Indicate Common Potential Only

Not To Represent Wire

CAP —Capacitor

COMP —Compressor

FM —Fan Motor

HTR —Heater

IFT —Indoor Frost Thermostat

NEC —National Electrical Code

OL —Overload

PCBD —Printed Circuit Board

HR1 —Heater Relay

HR2 —Heater Relay

CR —Compressor Relay

FR —Fan Relay

PLS —Primary Limit Switch

SLS —Secondary Limit Switch

SSS —Speed Selector Switch

ST —Start Thermistor

TRANS —Transformer

COMPONENT LEGEND

Contents

Main PTAC Customer Support Center 18008946449 SERVICE TECHNICIAN GUIDE PACKAGED TERMINAL AIR CONDITIONERS AND HEAT PUMPS CONTENTS 52C,P INTRODUCTION SUMMARY OF DANGERS, WARNINGS, AND CAUTIONS UNIT DISASSEMBLY TOOLS NEEDED REMOVE FRONT PANEL DISCONNECT POWER FOR CORD-CONNECTED UNIT DISCONNECT POWER FOR PERMANENTLY CONNECTED (HARDWIRED) UNITS OPEN THE CONTROL BOX REMOVE THE UNIT FROM THE WALL SLEEVE ACCESSING UNIT COMPONENTS ACCESSING INDOOR-AIR SECTION COMPONENTS ACCESSING OUTDOOR-AIR SECTION COMPONENTS Page Page REINSTALL FRONT PANEL GENERAL CLEANING CLEANING AND SAFETY TOOLS NEEDED MONTHLY CLEANING SEASONAL CLEANING Page COMPRESSOR COMPRESSOR TROUBLESHOOTING BASIC HERMETIC COMPRESSOR ELECTRICAL MEASUREMENTS COMPRESSOR REPLACEMENT Page Page HEATERS COMMON CAUSES OF HEATER FAILURE HEATER REMOVAL Page OPERATING CONTROLS UNIT-MOUNTED CONTROLS WALL-MOUNTED THERMOSTAT CONTROLS REMOTE THERMOSTAT TROUBLESHOOTING FIGURE 43 TYPICAL WIRING FOR MULTIPLE 52C PTAC UNITS CONNECTED TO ONE WALL THERMOSTAT DESCRIPTION OF SELECTOR SWITCH SETTINGS (Figure 44) NON-USER ADJUSTABLE CONTROLS SEQUENCE OF OPERATION COMPONENT OPERATION AND TROUBLESHOOTING Page Page ELECTRICAL COMPONENTS REMOVAL AND REPLACEMENT Page FAN MOTOR FAN MOTOR TROUBLESHOOTING BASIC FAN MOTOR ELECTRICAL TESTS FIGURE 56 FAN MOTOR TROUBLESHOOTING CHART TYPICAL 208/230 VOLT MOTORS TYPICAL 265 VOLT MOTORS FIGURE 57 TYPICAL 52C,P FAN MOTORS FAN MOTOR REPLACEMENT FIELD TEMPERATURE CHARTS Page Page Page Page Page Indoor Air Temperature Rise (F) Indoor Air Temperature Rise (F) Indoor Air Temperature Rise (F) WIRING DIAGRAMS FIGURE 68 52CQ & 52PQ TYPICAL WIRING SCHEMATIC FOR STANDARD HEAT PUMP UNITS FIGURE 69 52CQ AND 52 PQ TYPICAL WIRING SCHEMATIC FOR WALL THERMOSTAT HEAT PUMP UNITS FIGURE 70 52CE AND 52PE TYPICAL WIRING SCHEMATIC FOR STANDARD HEAT/COOL UNITS FIGURE 71 52CE AND 52PE TYPICAL WIRING SCHEMATIC FOR WALL THERMOSTAT CONTROL HEAT/COOL UNITS Page MOST FREQUENT PTAC SERVICE QUESTIONS ACCESSORIES 52C PERFORMANCE AND PHYSICAL DATA FIGURE 73 52CE PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT/COOL UNITS FIGURE 74 52CQ PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT PUMP UNITS 52P PERFORMANCE AND PHYSICAL DATA FIGURE 75 52PE PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT/COOL UNITS FIGURE 76 52PQ PERFORMANCE AND PHYSICAL DATA FOR STANDARD HEAT PUMP UNITS