60
SERVICING
SERVICE NUMBERS
S-1 CHECKING VOLTAGE ....................... 61
S-2 CHECKING WIRING .......................... 61
CHECKING THERMOSTAT, WIRING
AND ANTICIPATOR ............................ 61
S-3A THERMOSTAT AND WIRING ............. 61
S-3B HEATING ANTICIPATOR .................... 61
S-200 CHECKING DUCT STATIC ................ 65
S-201 CHECKING TEMPERATURE RISE ... 65
S-300 CHECKING PRIMARY
LIMIT CONTROL ................................ 66
S-301 CHECKING AUXILIARY
LIMIT CONTROL ................................ 67
S-302 CHECKING FLAME ROLLOUT
CONTROL ......................................... 67
S-303 INDUCED DRAFT BLOWER Motor ... 68
S-304 CHECKING GAS VALVE
(REDUNDANT) .................................. 68
S-305 CHECKING MAIN BURNERS............. 69
S-306 CHECKING ORIFICES....................... 69
S-307 CHECKING GAS PRESSURE ........... 69
S-308 CHECKING
HOT SURFACE IGNITOR .................. 71
S-309 CHECKING FOR FLASHBACK.......... 72
S-310 CHECKING PRESSURE CONTROL . 72
S-311 HIGH ALTITUDE
APPLICATION (USA) .......................... 72
S-312 CHECKING FOR
DELAYED IGNITION ........................... 73
S-313 CHECKING INTEGRATED
IGNITION CONTROL BOARDS ........ 73
S-313A MEMORY CHIPS................................ 74
S-314 CHECKING FLAME SENSOR.......... 75