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WKG Series Full Size Gas Convection Ovens - ELECTRICAL OPERATION
Power Switch (S1) . . .
Oven Light Switch (S2)
. . . . . . . . . . . . . . . . . . . . . . . .
Fan Speed Switch Hi/
Low (S3) . . . . . . . . . . . . .
Function Switch (S3) . . . Selects the cooking mode of the oven between Normal ROAST or ROAST & HOLD and
Buzzer . . . . . . . . . . . . . . .
Normal Roast Timer . . . Counts the ROAST time (normal cooking) of the product and signals the buzzer at the
Roast & Hold Timer . . .
Door Switch . . . . . . . . . .
Blower Motor . . . . . . . .
Motor Speed Relay
(R1) . . . . . . . . . . . . . . . . . .
Hold Relay (R2) . . . . . .
Transformer (T1) . . . . .
Solid State
Temperature Control
(WKGD/WKGDX) . . . . .
High Limit Thermostat . . .Protects the oven from temperatures above 550°F by removing power from the 1st valve
Computer Control
(WKGC/WKGCX) . . . . .
ELECTRICAL OPERATION
COMPONENT FUNCTION
Determines the mode of operation; ON, OFF, or COOL DOWN.
Controls the oven cavity lights.
Controls blower motor speed between Hi and Low settings. Available on standard models
WKG/WKGX or WKGD/WKGDX.On models with the ROAST & HOLD option (S3)
becomes the Function Switch.
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.
Signals the end of a Normal ROAST cycle (normal cooking) when time expires on the
Normal ROAST timer.
end of the cycle. On ROAST & HOLD models only, when the function switch (S3) is set
to Normal ROAST, this timer is used.
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.
Allows the oven to operate when the doors are closed but stops the oven from operating
when the doors are opened.
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.
Supplies power to the blower motor through (R1) relay contacts. Available on models
with Cook & Hold option only.
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.
Provides 24VAC power to the ignition control module and heating circuit.
Monitors temperature sensor and regulates the oven cavity temperature by controlling
the heat relay (R3) through the blower motor centrifugal switch contacts.
(safety) on the dual solenoid gas valve which stops the flow of gas to the burner. Auto
resets at 500°F.
Monitors temperature sensor and regulates the oven cavity temperature by controlling
the heat relay (R1) through the blower motor centrifugal switch contacts. Also, counts the
ROAST time (normal cooking) of the product and signals the electronic alarm at the end
of the cycle. If ROAST & HOLD mode is selected, when the ROAST (then hold) time
expires, the oven heating stops and the oven enters HOLD mode. Once the oven cavity
temperature drops to 150°F, the heat comes back on and the oven cycles at this
temperature to hold the cooked product. Roast & Hold is standard on computer models.
Page 37 of 74
F32700 Rev. B (0315)
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