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52C,P
SERIES
SERVICE TECHNICIAN GUIDE
PACKAGED TERMINAL AIR CONDITIONERS
AND HEAT PUMPS
CONTENTS
Page
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3
SUMMARY OF DANGERS, WARNINGS,
AND CAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
UNIT DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . 3,4 TOOLS NEEDED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 REMOVE FRONT PANEL . . . . . . . . . . . . . . . . . . . . . . . 3
DISCONNECT POWER FOR
DISCONNECT POWER FOR PERMANENTLY CONNECTED (HARDWIRED) UNITS . . . . . . . . . . . . 3 OPEN THE CONTROL BOX . . . . . . . . . . . . . . . . . . . . . 4
REMOVE THE UNIT FROM THE WALL SLEEVE . . 4
ACCESSING UNIT
ACCESSING
ACCESSING
GENERAL
BASIC HERMETIC COMPRESSOR
ELECTRICAL MEASUREMENTS . . . . . . . . . . . . . . . 14 COMPRESSOR REPLACEMENT . . . . . . . . . . . . . . . . 15
Page
HEATERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18,19 COMMON CAUSES OF HEATER FAILURE. . . . . . . 18 HEATER REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
OPERATING CONTROLS. . . . . . . . . . . . . . . . . . . . .
DESCRIPTION OF SELECTOR
SWITCH SETTINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
COMPONENT OPERATION AND TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 24
ELECTRICAL COMPONENTS REMOVAL
AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . 27
FAN MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIELD TEMPERATURE CHARTS . . . . . . . . . . . . . .
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . .
MOST FREQUENT PTAC SERVICE
QUESTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 ACCESSORIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
52C PERFORMANCE AND PHYSICAL DATA. . . . . . 48 52P PERFORMANCE AND PHYSICAL DATA . . . . . . 49
PTAC Customer Support Center
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