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
(S3) . . . . . . . . . . . . . . . . . . .
Controls blower motor speed between High and Low settings (VC4ES/6ES and VC4ED/
6ED only).
Alarm/Buzzer . . . . . . . . .
Signals the end of a "Cook" cycle when cooking time expires.
Cook Timer . . . . . . . . . . .
Counts the "Cook" time of the product and signals the buzzer at the end of the cycle
(VC4ES/6ES and VC4ED/6ED 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).
Transformer (T1) . . . . .
Provides 24VAC power to the Computer Control (VC4EC/6EC only).
Transformer (T2) . . . . .
Provides 240VAC power to the oven control circuit and blower motor (480VAC models
only).
Solid State
temperature
Control . . . . . . . . . . . . . . .
Monitors temperature sensor and regulates the oven cavity temperature by controlling
2CON to energize the heating elements when the control calls for heat.
High Limit
Thermostat . . . . . . . . . . .
Protects the oven from temperatures above 550°F by removing power from the heating
circuit. Auto resets at 500°F.
Computer Control . . . .
Monitors temperature sensor and regulates the oven cavity temperature by controlling
2CON to energize the heating elements when the control calls for heat. Also, counts the
"Cook" 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 "Cook" (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. Cook & Hold is standard on computer models.
The selected mode also determines the fixed blower speed of High for "Cook" and Low
for "Roast & Hold".
SSR1 & SSR2 . . . . . . . . .
When SSR1 is energized by computer control, connects power to blower motor for High
fan speed operation in normal "Cook" mode. In "Roast & Hold" Mode only, SSR1 is de-
energized and SSR2 is energized by computer control and connects power to blower
motor for Low fan speed operation (VC4EC/6EC only).
1CON & 2CON . . . . . . . .
Provides power to heating elements when both are energized. 1CON is energized when
power switch is turned ON. 2CON is energized by the temperature control when a call
for heat is made.
Power ON Light . . . . . . .
Lit whenever the power switch (S1) is turned to ON or Cool Down mode.
Heat Light . . . . . . . . . . . .
Lit whenever temperature control is calling for heat.
Temperature Probe . . .
Senses the oven temperature for the solid state temperature control or the computer
control. On oven models using the solid state control, converts the temperature into a
resistance valve which is monitored by the temperature control board. The probe is an
RTD (resistance temperature detector) of the Thermistor type. As temperature increases
the resistance value decreases. On oven models using the computer control, the probe
is a "J" type thermocouple.
VC4E & VC6E Series Full Size Electric Convection Ovens - ELECTRICAL OPERATION
F25105 Rev. B (0217)
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