98
SERVICING
S-1
CHECKING VOLTAGE..............................................................................................................99
S-2
CHECKING WIRING .................................................................................................................99
S-3
CHECKING THERMOSTAT, WIRING, AND ANTICIPATOR ....................................................99
S-3A Thermostat and Wiring ............................................................................................................99
S-3B Heating Anticipator...................................................................................................................99
S-4
CHECKING TRANSFORMER AND CONTROL CIRCUIT....................................................100
S-15 CHECKING CAPACITOR ....................................................................................................... 101
S-15A Resistance Check .................................................................................................................. 101
S-16A CHECKING AIR CIRCULATOR BLOWER MOTOR ............................................................. 101
S-200 CHECKING DUCT STATIC .................................................................................................... 113
S-201 CHECKING TEMPERATURE RISE ....................................................................................... 113
S-300 CHECKING PRIMARY LIMIT CONTROL.............................................................................. 114
S-301 CHECKING AUXILIARY LIMIT CONTROL............................................................................ 115
S-302 CHECKING FLAME ROLLOUT CONTROL ......................................................................... 117
S-303 TEST INDUCED DRAFT MOTOR ......................................................................................... 118
S-304 CHECKING GAS VALVE ......................................................................................................... 118
S-305 CHECKING MAIN BURNERS ................................................................................................ 118
S-306 CHECKING ORIFICES ........................................................................................................... 118
S-307 CHECKING GAS PRESSURE................................................................................................ 119
S-308 CHECKING HOT SURFACE IGNITOR.................................................................................. 122
S-309 CHECKING FOR FLASHBACK.............................................................................................. 123
S-310 CHECKING PRESSURE CONTROL .................................................................................... 123
S-311 HIGH ALTITUDE APPLICATON (USA) ...................................................................................124
S-312 CHECKING FOR DELAYED IGNITION .................................................................................124
S-313 CHECKING IGNITION CONTROL BOARDS .......................................................................124
S-314 CHECKING FLAME SENSOR................................................................................................ 128
SERVICE NUMBERS