APPENDIX
APPENDIX
SHUTDOWN
BURNER IGNITION SEQUENCE
Start burner
Pre-Purge 0
Pre-Purge 1 Fan on ignition speed
Fan on
ignition
NO
speed within
time?
YES
Pre ignition on
Ignite: ignition on,
Gas Valve open
Flame Proving,
Checking flame
Flame Current
NO
Above Minimal
Current?
Burn
Blocking error
Ignition Tries
YES
less than 3?
NO
Locking error
72
72
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