27
SEQUENCE OF OPERATION
FOR 24 VAC FAN CONTROL MODULE BOARD
PART NUMBER 520947
TIME LINE DESCRIPTION
Start Time
Thermostat Calls for Heat
15 Seconds Purge Cycle
7 Seconds Ignition Cycle and
Flame Sense
electrode for 7 seconds of ignition time.
2nd and 3rd Ignition Cycles if
Required
3 Try Ignition Board
not
Heating Cycle
90 Second Shut Down
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