Service Manual

SYSTEM OPERATION
63
sERVICE NUMBERS
S-1 CHECKING VOLTAGE .................................64
S-2 CHECKING WIRING ...................................64
CHECKING THERMOSTAT, WIRING
AND ANTICIPATOR ...................................64
S-3A THERMOSTAT AND WIRING ......................64
S-3B HEATING ANTICIPATOR ............................64
S-200 CHECKING DUCT STATIC............................68
S-201 CHECKING TEMPERATURE RISE.................68
S-300 CHECKING PRIMARY
LIMIT CONTROL ........................................69
S-301 CHECKING AUXILIARY
LIMIT CONTROL ........................................70
S-302 CHECKING FLAME ROLLOUT
CONTROL..................................................70
S-303 INDUCED DRAFT BLOWER M
OTOR ..............71
S-304 CHECKING GAS VALVE
(R
EDUNDANT).................................................71
S-305 CHECKING MAIN BURNERS.......................72
S-306 CHECKING ORIFICES .................................72
S-307 CHECKING GAS PRESSURE ........................72
S-308 CHECKING
HOT SURFACE IGNITOR.............................74
S-309 CHECKING FOR FLASHBACK .....................75
S-310 CHECKING PRESSURE CONTROL ...............75
S-311 HIGH ALTITUDE
APPLICATION (USA)..................................75
S-312 CHECKING FOR
DELAYED IGNITION ...................................76
S-313 CHECKING INTEGRATED
IGNITION CONTROL BOARDS ..................76
S-313A MEMORY CHIPS ........................................77
S-314 CHECKING FLAME SENSOR .....................78