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52C, P
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FIGURE 72 — 52PC — TYPICAL WIRING SCHEMATIC FOR
STANDARD COOLING ONL
Y UNITS
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