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DVC-35IP INTERMITTENT PILOT SEQUENCE OF OPERATION
START
System Check
Trial for
Ignition
Main Burner
Operation
END
(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 will be energized during the entire trial for ignition. This is normal operation for this gas ignition
system.
Page 18
Apply 24 VAC
To Appliance
Thermostat
Calls for Heat
Flame Signal
YES
Detected
NO
NO
Internal Check
OK
YES
Pilot Valve Opens
Ignitor Powered
Pilot Light and Flame is
NO
Sensed During Trial For
Ignition (1)
YES
Ignitor OFF
Main Valve Opens
YES
Flame Signal
Lost?
NO
Thermostat Call for Heat
Ends
Main Pilot Valves
Close
Pilot Valve Ignition OFF
Wait for Flame Signal to
Disappear
Pilot Valve Closes
Ignition OFF
3 Second Flame Recycle
Delay
Main Pilot
Valves Close
Flame Lost More
NO
Than 5 Times in
One Call for Heat
YES
5 Minute Retry Delay
12430-12-0709
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