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FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION
F24682 (Rev. B, October 2007) Page 30 of 68
ELECTRICAL OPERATION
COMPONENT FUNCTION
Power Switch (S1) ............. Determines the mode of operation; ON, OFF, or COOL DOWN.
Oven Light Switch (S2) ......... Controls the oven cavity lights.
Fan Speed Switch Hi/Low (S3) . . . Controls blower motor speed between Hi and Low settings. Available on
standard models VC4GS/6GS or VC4GD/6GD. On models with the ROAST
& HOLD option (S3) becomes the Function Switch.
Function Switch (S3) ........... Selects the cooking mode of the oven between Normal ROAST or ROAST
& HOLD and is used in conjunction with the ROAST & HOLD timer during
ROAST & HOLD cooking. The selected mode also determines the fixed
blower speed of Hi for Normal ROAST and Low for ROAST & HOLD. In
ROAST & HOLD mode only, energizes the hold relay (R2). Available on
models with ROAST & HOLD option only. On Standard models (S3)
becomes the Function Switch.
Buzzer ....................... Signals the end of a Normal ROAST cycle (normal cooking) when time
expires on the Normal ROAST timer.
Normal Roast Timer ............ Counts the ROAST time (normal cooking) of the product and signals the
buzzer at the end of the cycle. On ROAST & HOLD models only, when the
function switch (S3) is set to Normal ROAST, this timer is used.
Roast & Hold Timer ............ When the function switch (S3) is set to ROAST & HOLD, this timer must
used for ROAST & HOLD cooking. When the ROAST (then hold) time
expires and the function switch is set to ROAST & HOLD, this timer is used
to transfer control of the oven temperature to the Hold thermostat. Available
on models with Roast & Hold option only.
Door Switch .................. Allows the oven to operate when the doors are closed but stops the oven
from operating when the doors are opened.
Blower Motor ................. Operates the oven cavity blower (convection fan). Also, an internal
centrifugal switch on the motor is utilized to allow the connection of power
to the heat relay (R3) when the motor is at operating speed.
Motor Speed Relay (R1) ......... Supplies power to the blower motor through (R1) relay contacts. Available
on models with Roast & Hold option only.
Hold Relay (R2)................ Hold relay (R2) supplies power to the Hold thermostat for maintaining the
fixed hold temperature in the oven cavity, after the ROAST & HOLD time
expires.
Transformer (T1)............... Provides 24VAC power to the ignition control module and heating circuit.
Solid State Temperature Control
(VC4GD/6GD) ................. Monitors temperature sensor and regulates the oven cavity temperature by
controlling the heat relay (R3) through the blower motor centrifugal switch
contacts.
High Limit Thermostat .......... Protects the oven from temperatures above 550°F by removing power from
the 1
st
valve (safety) on the dual solenoid gas valve which stops the flow of
gas to the burner. Auto resets at 500°F.