PEERLESS SERIES DE - Ignition System Operating Sequence

I=1al=[o,]i_,_T_li
START
TRIAL
FOR
IGNITION
L
MAIN
BURNER
OPERATION
t APPLY 24 VAC I
TO APPLIANCE
LTHERM°STATI
CALLS FOR HEAT
I FLAME SIGNAL
DETECTED_ NO
I INTERNAL CHECK OKAY? t NO
_YES
I • PILOT VALVE OPENS I• IGNITER POWERED
PILOTLIGHTSAND FLAME NO
IS SENSED DURING A_[TRIAL FOR IGNITION?
YES
• IGNITER OFF ]• MAIN VALVE OPENS
I
• WAIT FOR FLAME SIGNAL
TO DISAPPEAR
• PILOT VALVE/IGNITER
REMAIN OFF
]
• PILOT VALVE CLOSES
• IGNITER OFF
[
END
_r
i FLAME SIGNAL LOST? _-_
_NO
i THER"OSTATCALLFORIHEATENDS
I • MAIN AND PILOT VALVES CLOSE
• MAIN AND PILOT VALVES CLOSE
FLAME LOST MORE THAN
FIVE TIMES IN ONE
CALL FOR HEAT?
J 1
/_ 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 RNAL
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.
I IVE-MINUTE RETRY
DELAY
Figure 19: Ignition System Operating Sequence
19