Operation and Care Manual #6011 • 7
Thermostat Calls for
Heat
• Pilot Valve/Ignition Off
• Wait for Flame Signal to
Disappear
• Pilot Valve Closes
• Igniter Off
• Main and Pilot Valves Close
• EFT Output De-energizes
Flame Lost More than Five
Times in One Call for Heat?
Five Minute Retry Delay
Flame Signal
Detected!
Internal Check
Okay?
Pilot Lights and Flame
is sensed during
Trial for Ignition?
• Igniter Off
• Main Valve Opens
Electronic Fan
Timer (EFT)
Output Energizes
Flame Signal Lost?
Thermostat Call for
Heat Ends
Apply 24 VAC
to Appliance
• Main and Pilot Valves Close
• EFT Output De-energizes
• Pilot Valve Opens
• Igniter Powered
Three Second Flame Failure
Recycle Delay
Start
Main
Burner
Operation
End
YES
NO
YES
NO
NO
YES
Igniter 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.
1
Trial for
Ignition
1
NO
NO
YES
I n s t a l l a t i o n • S e c t i o n 1
1.16 - Honeywell SmartValve
TM
SYSTEM
SEQUENCE OF OPERATION
