DVC-35IPT INTERMITTENT PILOT SEQUENCE OF OPERATION
START
SYSTEM CHECK
TRIAL FOR
IGNITION
MAIN BURNER OPERATION
Apply 24 VAC to Appliance
Thermostat
Calls for Heat
Flame Signal
Detected
Internal Check
OK
Pilot Valve Opens Ignitor Powered
Pilot Light and lame is Sensed During Trial For Ignition (1)
Ignitor Off
Main Valve Opens
Flame Signal
Lost?
Thermostat Call for Heat Ends
5 Minute Retry
Delay
Pilot Valve Ignition OFF
Wait for Flame Signal to
Disappear
Pilot Valve Closes
Ignition OFF
3 Second Flame
Failure Recycle
Delay
Main Pilot
Valves Close
Flame Lost More
Than 5 Times in
One Call for Heat
END
Main Pilot Valve
Close
(1)Ignitor will turn OFF about 30 seconds into the trial for ignition if the pilot flame has not lit. It will turn back ON for the final 30 seconds of the 90 second trial for ignition. The pilot valve will be energized during the entire trial for ignition. This is normal operation for this gas ignition system.
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