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Part # MCOSM06 Rev 1 (11/03/08)
If the pilot burner ame extinguishes during the run state
(ameout), the control de-energizes the pilot and main gas
valve for the interpurge period. After this period, another
trial for ignition is initiated. If the ameout cycle repeats for a
total of 16 times (pilot burner ame established then lost), the
control will:
• EnterthelockoutmodeifthecontrolisaG770/G777.The
thermostat contacts must be opened for 30 seconds and
then closed to escape the lockout condition.
• Entertheshutomodeandrecycleperiod(5minute
recycle delay for the G775/G779 and 60 minute recycle
for the G776/G778) before beginning another trial for
ignition, starting with prepurge.
Wiring Diagram For Integral Spark/Sense Without Vent Damper
GROUND
5
24 V
LED
THS 2
PV 1
MV 3
Transformer
Pilot Burner
Assembly
Integral
Igniter/Sensor
Main Burner
Ground
Pilot
Gas Supply
Pilot
Valve
Main
Valve
Ignition Control
Limits in Thermostat
Line Only