ELECTRICAL OPERATION
COMPONENT FUNCTION
FRYER CONTROLS
Solid State or
Computer Cooking
Control (D or C
Models) . . . . . . . . . . . . . . .
Monitors and evaluates input signals to the control: activates heat output signal to
maintain shortening temperature; counts product cook time(s), and signals the electronic
alarm at the end of a cooking cycle; activates the left and right lift output signal to operate
the basket lift(s); and activates filter output signal to power the fill solenoid valve.
. . . . . . . . . . . . . . . . . . . . . . . . NOTE:
By utilizing the same wiring harness connections, the two control types are
interchangeable between fryers.
Control Interface
Board . . . . . . . . . . . . . . . . .
Provides the output signal interface from the cooking control to regulate gas heating,
basket lift operation, and fill solenoid valve operation. The board components consist of
a heat control Triac and K1, K2 & K3 N.O. relays.
Transformer . . . . . . . . . .
Supplies 24VAC to the cooking control. If equipped with electronic ignition, also supplies
power to ignition control module. Transformer is energized when power switch is turned
on.
Power Switch . . . . . . . . .
Supplies power to control circuit for fryer operation and filtering.
Gas Combination
Valve . . . . . . . . . . . . . . . . .
Allows gas flow to the pilot when pilot valve coil is energized, and gas flow to the burners
when main valve coil is energized. Also regulates the gas manifold pressure.
High Limit
Thermostat . . . . . . . . . . .
Prevents the shortening from reaching temperatures over 450°F (auto reset @ 415°F).
Serves as a backup to the cooking control’s high temperature alarm setting of 415°F
(normal operation resumes when temperature falls below this point).
Temperature Probe . . .
Senses temperature of shortening. Converts the temperature into a resistance valve
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.
Ignition Control
Module . . . . . . . . . . . . . . .
Controls and monitors gas pilot ignition. Energizes pilot valve coil on the 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. Electronic ignition
models only.
Ignitor/Flame
Sense . . . . . . . . . . . . . . . . .
Ignites the gas pilot, and senses the presence of a flame. The flame presence generates
a micro-amp flame sense current that is rectified to the ignition control module. The spark
ignitor/flame sense is a component for the gas pilot with electronic ignition only.
Drain Valve Interlock
Switch (DVI) . . . . . . . . . .
A magnetic reed switch mounted on the manual drain valve that supplies a 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.
KLEENSCREEN FILTER CONTROLS
Fill Solenoid Valve . . . .
When energized by filter key, the solenoid valve opens to allow the flow of shortening
through filtering system.
Pump Motor . . . . . . . . . .
Operates pump to circulate shortening through filtering system.
Discard Valve
Switch . . . . . . . . . . . . . . . .
A magnetic reed switch mounted on the mechanical discard valve that closes when
discard valve handle is extended to discard the shortening. Prevents R2 filter relay N.C.
contacts from suppling power to the fill solenoid valve when filter key is pressed.
R1 Pump Motor
Relay . . . . . . . . . . . . . . . . .
When 24VAC relay coil is energized by filter key, supplies 120VAC to pump motor and
fill solenoid valve (through R2 fill relay N.C. contacts).
GR Series Gas Fryers with NCC Controls (formerly Tridelta / Built after 3/05) - ELECTRICAL OPERATION
F35660
Rev. A (0717)
Page 36 of
56
