SERVICING
59
S-1
CHECKING VOLTAGE ................................................................................................................................. 62
S-2
CHECKING WIRING .................................................................................................................................... 62
S-3A
THERMOSTAT AND WIRING ..................................................................................................................... 62
S-3B
HEATING ANTICIPATOR ............................................................................................................................. 62
S-4
CHECKING TRANSFORMER AND CONTROL CIRCUIT ............................................................................. 63
S-16A
CHECKING AIR CIRCULATOR BLOWER MOTOR (ECM) ........................................................................... 63
S-200
CHECKING DUCT STATIC ........................................................................................................................... 66
S-201
CHECKING TEMPERATURE RISE ............................................................................................................. 67
S-300
CHECKING PRIMARY LIMIT CONTROL ...................................................................................................... 67
S-301
CHECKING AUXILIARY LIMIT CONTROL .................................................................................................... 68
S-302
CHECKING FLAME ROLLOUT CONTROL .................................................................................................. 69
S-303
INDUCED DRAFT BLOWER MOTOR .......................................................................................................... 70
S-304
CHECKING GAS VALVE (REDUNDANT) .................................................................................................... 70
S-305
CHECKING MAIN BURNERS ...................................................................................................................... 70
S-306
CHECKING ORIFICES ................................................................................................................................ 70
S-307
CHECKING GAS PRESSURE ..................................................................................................................... 71
S-308
CHECKING HOT SURFACE IGNITOR ......................................................................................................... 74
S-309
CHECKING FOR FLASHBACK ................................................................................................................... 74
S-310
CHECKING PRESSURE SWITCH ............................................................................................................... 74
S-311
HIGH ALTITUDE APPLICATION (USA) ....................................................................................................... 75
S-312
CHECKING FOR DELAYED IGNITION ........................................................................................................ 75
S-313
CHECKING INTEGRATED IGNITION CONTROL BOARDS ........................................................................ 75
S-314
CHECKING FLAME SENSOR ................................................................................................................... 77
SERVICING TABLE OF CONTENTS
