Electrical Operation; Component Function; Sequence Of Operation; Electric Model - Vulcan-Hart VGCTS16 Service Manual

ROUND TILTING BRAISING PANS - ELECTRICAL OPERATION
Heater Contactors . . . . . . . . Controls power to heating elements. (electric models only)
Heating Elements (3) . . . . . Heat the braising pan cooking surface. (electric models only)
Transformer . . . . . . . . . . . . Provides 24VAC power to ignition control module and HSI. (gas models only)
Ignition Module . . . . . . . . . Controls and monitors gas heating. Applies power to HSI for burner ignition,
Temperature Light . . . . . . . Indicates the power switch is on and a temperature setting dialed. Light goes out
Ignition Light . . . . . . . . . . . Indicates gas burner is on. (gas models only)
FSP (Flame Sense Probe) . . Supplies a current signal back to the ignition module indicating the presence of a
HSI (Hot Surface Igniter) . . When Ignition module applies power, the HSI element heats up to very high
Power Switch . . . . . . . . . . . Controls electrical power to the control circuit.
Limit Switch . . . . . . . . . . . . . Removes electrical power to the temperature control board when the pan is
Gas Solenoid Valve . . . . . . . Allows gas flow to burner when solenoid is energized. A normally closed valve.
High Limit Thermostat . . . . Will not allow heater contactor (on electric models) or ignition module (on gas
Control Thermostat . . . . . . . Cycles power to heater contactors to maintain the set point temperature.
Temperature Controller . . . . Cycles power to the ignition control module to maintain the set point

Electric Model

1. Conditions.
A. Braising Pan connected to correct voltage
and is properly grounded.
B. Power switch OFF.
C. High limit thermostat contacts closed.
D. Control Thermostat dial OFF.
E. Temperature light OFF.
2. Power switch turned ON.
A. L1 voltage supplied through high limit
thermostat contacts (N.C.) to one side of
the control thermostat.
B. L3 voltage to one side of contactor coils.
3. Turn thermostat (potentiometer) dial until a call
for heat is made.
1) Temperature light comes on.
2) L1 voltage is supplied to the other
side of contactor coils. Coils are
energized and contacts close.

ELECTRICAL OPERATION

COMPONENT FUNCTION

monitors flame presence through FSP, controls 5 second purge time and 8.5
second ignition trial time and powers gas solenoid valve. (gas models only)
when set point temperature is reached and will come back on when temperature
drops below set point.
flame. (gas models only)
temperatures to ignite the gas. (gas models only)
tilted. (gas models only)
(gas models only)
models) to energize if the pan surface temperature goes beyond 536°F (280°C).
(electric models only)
temperature. (gas models only)

SEQUENCE OF OPERATION

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3) Heating elements are then energized
and the cooking surface begins to
heat up.
4. Control thermostat reaches set point
temperature and contacts (N.O.) open.
A. Temperature light goes out.
B. L1 voltage is removed from one side of
contactor coils. Coils are de-energized and
contacts open.
C. Heating elements are then de-energized
allowing the cooking surface to cool.
5. Control thermostat temperature drops below set
point and contacts (N.O.) close.
A. Cooking surface temperature is
maintained by the heaters cycling with the
control thermostat until the thermostat dial
is turned to the OFF position or the power
switch is turned OFF.