Sequence Of Operation - Lang GCCO-T Service Manual

Power to oven light switch .
120/24-volt transformer energized.
24 volts to 6 (Johnson Control), TH (Channel Products), and ground of spark module.
Spark module begins sparking at pilot burner.
24 volts to pilot valve coil of combination gas valve.
Pilot valve opens.
Gas flows to pilot burner.
Pilot burner lights.
Pilot light confirmed by spark module.
12 to 13 micro amps on pin 4 (Johnson Control), and Sens (Channel products).
24 volts from pin 3 (Johnson Control) and MV (Channel products) to isolation transformer.
24-volt isolation transformer energizes.
24 volts to pins 9 and 7 of circuit board.
24 volts to motor relay through door switch and pulse-fan switch.
Motor relay closes energizing motor and closing centrifugal switch.
Temperature set on 12-position switch.
24 volts from circuit board to MV on combination valve through pulse-switch, centrifugal switch,
and over temperature thermostat.
Main burner ignites.
Power switch turned to "ON" position.
Power to oven light switch .
120/24-volt transformer energized.
24 volts to 6 (Johnson Control), TH (Channel Products), and ground of spark module.
Spark module begins sparking at pilot burner.
24 volts to pilot valve coil of combination gas valve.
Pilot valve opens.
Gas flows to pilot burner.
Pilot burner lights.
Pilot light confirmed by spark module.
12 to 13 micro amps on pin 4 (Johnson Control), and Sens (Channel products).
24 volts from pin 3 (Johnson Control) and MV (Channel products) to isolation transformer.
24-volt isolation transformer energizes.
24 volts to pins 9 and 7 of circuit board.
24 volts to motor relay through door switch and pulse-fan switch.
Motor relay closes energizing motor and closing centrifugal switch.
Temperature set on 12-position switch.
24 volts from circuit board to MV on combination valve through pulse-switch, centrifugal switch,
and over temperature thermostat.
Main burner ignites.
SEQUENCE OF OPERATION GCCO-T
SEQUENCE OF OPERATION GCCO-AP
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