Electrical Operation; Component Function - Vulcan-Hart 1GR45A Service Manual

COMPONENT FUNCTION

Cooking Control . . . . . . . . . . . . . . Monitors and evaluates input signals to the control: Activates heat output
Transformer . . . . . . . . . . . . . . . . . Supplies 24VAC to the cooking control ignition control module. Transformer
Power Switch . . . . . . . . . . . . . . . . Supplies power to control circuit for fryer operation and filtering.
Melt Select Switch . . . . . . . . . . . . Controls burner operation based on type of shortening being used (liquid/
Gas Combination Valve . . . . . . . . Allows gas flow to the pilot when pilot valve coil is energized; and gas flow to
High Limit Thermostat . . . . . . . . . Prevents the shortening from reaching temperatures over 450EF (auto reset
Temperature Probe . . . . . . . . . . . Senses temperature of shortening. Converts the temperature into a
Ignition Control Module . . . . . . . . Controls and monitors gas pilot ignition. Energizes pilot valve coil on the
Ignitor/Flame Sense . . . . . . . . . . . Ignites the gas pilot and senses the presence of a flame. The flame
Drain Valve Interlock
Switch (DVI) . . . . . . . . . . . . . . . . . A magnetic reed switch mounted on the manual drain valve that supplies a
GRA SERIES GAS FRYERS - ELECTRICAL OPERATION

ELECTRICAL OPERATION

FRYER CONTROLS
signal to maintain shortening temperature; and activates filter output signal
to power the fill solenoid valve.
is energized when power switch is turned on.
solid).
the burners when main valve coil is energized. Also, regulates the gas
manifold pressure.
@ 415°F, normal operation resumes when temperature falls below this
point).
resistance which is monitored by the cooking control. The probe is an RTD
(resistance temperature detector) of the Thermistor type. As temperature
increases the resistance value decreases.
combination control valve and generates spark for pilot ignition. Monitors the
presence of a flame and supplies an ignition status input signal to the
cooking control.
presence generates a micro-amp flame sense current that is rectified to the
ignition control module.
drain valve position signal (open/closed) to the cooking control. When drain
valve is open, the drain interlock input to the control is removed (magnetic
reed switch contacts open). This prevents gas burners from coming on with
the fry tank empty.
Page 19 of 36 F25377 (March 2010)