34
SEQUENCE OF OPERATION GCCO-SII
Power switch turned to “ON” position.
Power to oven
light
switch
.
120/24-volt
transformer
energized.
24 volts to
TH
, 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 1 and 2 of
circuit
board
.
24 volts at motor out put (pin5) to ground.
24 volts to
motor
relay
through door switch and pulse-fan switch.
Motor relay
closes energizing motor and closing centrifugal switch.
Temperature set on circuit board.
24 volts at heat out put to ground.
24 volts from circuit board to
MV
on combination valve through pulse-switch, centrifugal switch,
and over temperature thermostat.
Main burner ignites.
Summary of Contents for GCCO-T
Page 29: ...29 GENERAL CONT D ONE PAN TWO PAN THREE PAN FOUR PAN FIVE PAN...
Page 59: ...59 TECHNICAL DATA CONT D GCCO C TEST POINT LAYOUT TP 2 TP 1 TP 3 TP 4 TP5 TP6 TP7...
Page 61: ...61 WIREING DIAGRAM GCCO T...
Page 62: ...62 WIRING DIAGRAM GCCO AP...
Page 63: ...63 WIRING DIAGRAM GCCO SII...
Page 64: ...64 WIRING DIAGRAM GCCO C...
Page 65: ...65 WIRING DIAGRAM GCCO PP...
Page 66: ...66 WIRING DIAGRAM GCCO PT...