Vermont Castings 33XDV Installation Instructions And Homeowner's Manual page 39

Normal Operation
ON/OFF Switch Closed?
Safe Start Check On?
0 Sec Purge
Ignition Trial: 30 sec Spark ON
Pilot Valve ON. Has Flame
been Detected within 30 sec?
Spark Off. Main Valve ON.
Pilot Flame Continuously
Monitored
Pilot Flame Sense OK?
ON/OFF Switch Opened?
Pilot and Main Valve OFF?
0 sec Post Purge?
Heating Cycle Complete LED:
OFF
10009383
Troubleshooting the Gas Control System
SIT 822 Valve with Synetek Electronic Control
Operating Diagram
YES
NO
YES
NO
NO
YES
YES
Abnormal Operation
5 sec Inter-Trial Delay
LED: Steady Flash?
Lockout: Flame detected out of sequence
Reset by interrupting ON/OFF switch or
power for 10 sec
LED: 5 Flashes?
Reverse power cord polarity
LED: 2 Flashes?
Reset by interrupting ON/OFF
switch for power for 10 sec
Pilot, Valve OFF, Spark OFF
Have three ignition trials been completed?
LED: 3 Flashes?
Lockout: Flame Loss
Reset by interrupting ON/OFF switch or
power for 10 sec
Main Valve OFF, Spark ON
YES
Has flame been detected within 30 sec?
Have three pilot flame losses been
detected?
XDV Direct Vent Gas Fireplace
YES
NO
NO
YES
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