Application Guideline
and Service Manual
Resident ial Air Conditio ner s and Heat Pumps
U s i n g R --- 2 2 a n d P u r o n r Refrigerant
TABLE OF CONTENTS
PAGE
UNIT IDENTIFICATION 2.............................
SAFETY CONSIDERATIONS 3.........................
INTRODUCTION 3...................................
INSTALLATION GUIDELINE 3........................
ACCESSORIES AND DESCRIPTIONS 4 -- 5..............
LOW--AMBIENT GUIDELINE 6 -- 7......................
LONG LINE GUIDELINE 8............................
CABINET ASSEMBLY & COMPONENTS 8 -- 11...........
ELECTRICAL 12 -- 13.................................
Aluminum Wire 12.................................
Contactor 12......................................
Capacitor 12--13...................................
Cycle Protector 13..................................
Crankcase Heater 13................................
Time--Delay Relay 13...............................
PRESSURE SWITCHES 14.............................
DEFROST THERMOSTAT 15..........................
DEFROST CONTROL BOARD 15 -- 17...................
SYSTEM FUNCTION AND
SEQUENCE OF OPERATION 17--18.....................
COPELAND SCROLL COMPRESSOR 19................
LG SCROLL COMPRESSOR 19--20.....................
COMPRESSOR TROUBLESHOOTING 21--23.............
Compressor Failures 21..............................
Mechanical Failures 21--22...........................
Electrical Failures 23................................
REFRIGERATION SYSTEM 24--31......................
Refrigerant 24.....................................
Servicing Systems on Roofs With Synthetic Materials 24....
Brazing 24........................................
Service Valves and Pump down 25--27..................
Liquid Line Filter Drier 28...........................
Suction Line Filter Drier 28...........................
Accumulator 29....................................
Thermostatic Expansion Valve (TXV) 30--31.............
MAKE PIPING CONNECTIONS 31......................
PAGE
REFRIGERATION SYSTEM REPAIR 32--34...............
Leak Detection 32..................................
Coil Removal 32...................................
Compressor Removal and Replacement 33...............
System Clean--Up After Burnout 33....................
Evacuation 34.....................................
CHECK CHARGE 34..................................
TROUBLESHOOTING WITH SUPERHEAT 35-- 44..........
TWO--STAGE 25HNB / 24ANB 45--55...................
APPLICATION GUIDELINES 45........................
MODEL PLUG 45....................................
Airflow Selections For 24ANB7 / 25HNB6 / 24ANB1 /25HNB9
Using Non--Communicating (Non--infinity) Thermostats 46.....
Airflow Selection For FV4 Fan Coils For 24ANB1, 24ANB7,
25HNB6, 25HNB9 Using Non--Communicating (non--Infinity)
Thermostats 46.......................................
GENERAL INFORMATION 46--47.......................
CHECK CHARGE 47--48...............................
SYSTEM FUNCTION AND
SEQUENCE OF OPERATION 48--51.....................
TROUBLESHOOTING 51--55...........................
TWO STAGE NON--COMMUNICATING
24ACB7 / 25HCB6 56--58..............................
OPERATING AMBIENT 56.............................
Airflow Selections (ECM Furnaces) 56.....................
Airflow Selection for Variable Speed Furnaces
(non--communicating) 56................................
Airflow Selection for FV4C Fan Coils
(non--communicating) 56................................
SYSTEM FUNCTION AND
SEQUENCE OF OPERATION 57--58.....................
CHECK CHARGE 58..................................
CARE AND MAINTENANCE 59--60.....................
PURON QUICK REFERENCE GUIDE 60.................
AC TROUBLESHOOTING CHART 61....................
HP TROUBLESHOOTING CHART -- HEATING CYCLE 62..
HP TROUBLESHOOTING CHART -- COOLING CYCLE 63..
INDEX OF TABLES 64................................
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