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HALF-SIZE CONVECTION OVENS - ELECTRICAL OPERATION
22
5. After verification of heat mode and door closed:
A. Ignition transformer primary powered: wire
#26/43; J2-13; J2-15; J1-5; wire #5; BK/BL
wire; WH/BK wire; wire #7; J1-7; wire #2; J1-
2; Wire #2; L2
1) 24 VAC from secondary of ignition
transformer to ignition module: wire #52;
centrifugal switch; wire #54; terminal 24V
of control module; GND
B. Solid state relay energized: 16 to 18 VDC
output on J2-11; J1-20; wire #20; wire #19;
J1-19; J2-10
1) Blower motor energized: wire #26/4; J1-4;
wire #4/34; ss relay contacts; wire #9; J1-
9; wire #11; J1-11; wire #11; wire #13/7;
J1-7; wire #2; J1-2; Wire #2; L2
a. Blower motor reaches operating
speed, blower motor centrifugal
switch closes
6. Ignition module operates (see ignition module
sequence of operation)
7. Oven cycles on electronic control until
power/cooldown switch is moved from the "on"
position, a different mode is selected or the door is
opened.
NOTE:
The blower motor is de-energized and gas
valve closed when the door is opened while the oven
is in the heat mode.
Cook
1. Conditions
A. Oven in preheat.
2. Temperature is set.
3. Time is set and start key pressed.
4. Oven cycles at set temperature.
NOTE:
In pulse mode (initiated at the beginning of
the bake cycle), the blower motor is operated in 45
second cycles, with the first cycle being off then 45
seconds on. The pulse time cannot be longer than
the bake time.
5. Time expires.
A. Buzzer sounds continually until turned off.
6. Oven continues to cycle at set temperature.
NOTE:
The blower motor and gas valve are de-
energized when the door is opened while the oven is
in the cook mode.
Cook and Hold
1. Conditions
A. Oven in preheat.
2. A bake temperature and time is set.
3. A hold temperature and time is set and start key
pressed.
4. Oven cycles at set temperature.
NOTE:
In pulse mode (initiated at the beginning of the
bake cycle), the blower motor is operated in 45 second
cycles, with the first cycle being off then 45 seconds on.
The pulse time cannot be longer than the bake time.
5. Time expires in cook mode.
A. Buzzer sounds (short beep).
B. Control lowers temperature to hold
temperature.
6. Oven temperature reaches hold temperature.
A. Display counts up time and flashes "hold"
7. Oven continues to cycle at hold temperature until
oven is turned off or the hold function is turned off.
NOTE:
The blower motor and gas valve are de-
energized when the door is opened while the oven is
in the hold mode.
Cooldown (Gas/Electronic Control)
NOTE:
Use GCO2C Schematic
1. Conditions
A. Cooking completed, oven temperature needs
to be lowered.
B. Power/cooldown switch on
2. Power/cooldown switch to cooldown
A. Control transformer primary powered: wire
#26/4; J1-4; wire #4/94; wire #97/7; J1-7; wire
#2; J1-2; wire #2; L2
3. Control powered from secondary of control
transformer:
A. 6 VAC - wire #16; J1-16; J2-3; J2-2; J1-15;
wire #15
B. 12 VAC - wire #14; J1-14; J2-1; J2-2; J1-15;
wire #15
4. Control verifies cooldown mode: 16 to 18 VDC
output on J2-11; J1-20; wire #20/21;
power/cooldown switch; wire #29; J2-5