SERVICING
39
SERVICE NUMBERS
S-1
CHECKING VOLTAGE ............................................................................................................................45
S-2
CHECKING WIRING ...............................................................................................................................45
S-3A
THERMOSTAT AND WIRING .................................................................................................................45
S-3B
HEATING ANTICIPATOR ........................................................................................................................45
S-4
CHECKING TRANSFORMER AND CONTROL CIRCUIT ......................................................................
46
S-16A
CHECKING AIR CIRCULATOR BLOWER MOTOR (PSC) ....................................................................
46
S-200 CHECKING DUCT STATIC .....................................................................................................................
46
S-201 CHECKING TEMPERATURE RISE ........................................................................................................47
S-300 CHECKING PRIMARY LIMIT CONTROL ...............................................................................................47
S-302
CHECKING FLAME ROLLOUT CONTROL ............................................................................................
48
S-303
INDUCED DRAFT BLOWER MOTOR ....................................................................................................
49
S-304
CHECKING GAS VALVE (REDUNDANT) ...............................................................................................
49
S-305 CHECKING MAIN BURNERS .................................................................................................................
49
S-306
CHECKING ORIFICES ...........................................................................................................................50
S-307
CHECKING GAS PRESSURE ................................................................................................................50
S-308
CHECKING HOT SURFACE IGNITOR ...................................................................................................52
S-309
CHECKING FOR FLASHBACK ..............................................................................................................52
S-310
CHECKING PRESSURE SWITCH .........................................................................................................52
S-311
HIGH ALTITUDE APPLICATION (USA) ................................................................................................53
S-312
CHECKING FOR DELAYED IGNITION ..................................................................................................53
S-313
CHECKING INTEGRATED IGNITION CONTROL BOARDS ................................................................53
S-314
CHECKING FLAME SENSOR ..............................................................................................................53