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ELECTRIC BRAISING PANS - ELECTRICAL OPERATION
F35410 (May 2003)
Page 21 of 32
ELECTRICAL OPERATION
COMPONENT FUNCTION
BRAISING PAN CONTROLS
Temperature Controller . . . Monitors thermocouple input (type E) and regulates braising pan temperature.
An external set point potentiometer is used for temperature adjustments.
120/24VAC Transformer . . . Supplies 24VAC for heating control circuit. If motorized pan lift option is
installed, supplies 24VAC for lift control circuit.
240-480/120VAC
Transformer ............. Supplies 120VAC for control circuit.
ON/OFF Switch .......... Controls 24VAC to the heating control circuit. If motorized pan lift option is
installed, controls power to the lift control circuit.
Power On Light (Amber) . . . Indicates on/off switch is turned on.
Heat Light (Red) ......... Indicates temperature controller is calling for heat and pan is down.
Pan Position/
Down Limit Switch ....... N.O. contacts function as pan position switch to power the heating circuit when
pan is down. Removes power from heating circuit when pan is raised. The N.C.
contacts are used for the down limit switch (motorized lift option only).
Fuses F1 & F2 ........... Protects control circuit if current exceeds the rated amperage.
K3 Heat Relay ........... Supplies power to contactor coils C1, C2 & C3.
Contactors C1, C2, C3 .... Supplies line voltage to heating elements.
Heating Elements ........ Produces heat for the braising pan cooking surface.
High Limit Thermostat .... Prevents braising pan from reaching excessive temperatures by removing
power to contactors. Monitors surface temperature of the insulation cover and
not the pan. Open at 400
/F; close at 360/F (auto reset).
MOTORIZED PAN LIFT OPTION CONTROLS
DC Motor Controller ...... Controls DC lift motor operation for raising & lowering of the pan, and provides
motor acceleration control each time the controller is powered. The controller
outputs approximately 90VDC to power the motor.
DC Lift Motor ............ Operates gear reducer to raise or lower the pan. When the correct voltage
polarity is applied thru K1 contacts, motor rotates CW to raise pan. When
reverse voltage polarity is applied thru K2 contacts, motor rotates CCW to lower
the pan.
Lid Switch .............. Controls 24VAC power to lift control switch. Used to ensure lid is open before
pan can be raised.
Lift Control Switch
(Momentary On/Off/On) . . . Energizes K1 relay coil thru up limit switch contacts (N.C.) to raise the pan.
Energizes K2 relay coil thru down limit switch contacts (N.C.) to lower the pan.
The switch positions are: Center neutral (starting) position off; Momentary on -
lower pan; Momentary on - raise pan.
Up Limit Switch .......... Removes power from K1 relay coil when pan reaches full tilt (pan travel stops).
Pan Position/
Down Limit Switch ....... N.C. contacts function as down limit switch to remove power from K2 relay coil
when pan is lowered to the down position (pan travel stops). The N.O. contacts
are used for the pan position switch.