GRA SERIES GAS FRYERS - ELECTRICAL OPERATION
Kleenscreen Filtering System
Refer to schematic diagram AI 2728 for Kleenscreen Filter System operation. Refer to Installation & Operation
manual and Kleenscreen Filtration System Supplement manual for specific instructions on filtering.
NOTE:
The discard valve handle is connected to a mechanical valve and magnetic reed switch assembly to route
the flow of shortening in the filtering system and supply power to the pump motor.
1.
Conditions.
A.
Fryer connected to correct supply voltage and is properly grounded .
B.
Power switch to fryer section to filter turned on.
C.
The cooking control should be setup properly and ready to use.
D.
Cooking control temperature setting between 300°F (minimum) and 350°F (maximum).
NOTE:
Shortening should not be filtered outside of this temperature range. At lower temperatures the
shortening is thicker which may increase filtering time and place a greater load on the pump. At higher
shortening temperatures, oil seal life is decreased.
E.
Filter drawer assembly installed properly.
F.
Discard valve handle (yellow) retracted.
1)
Discard valve switch N.O. contacts open. Mechanical discard valve closed.
2.
Allow shortening to cycle between 300°F and 350°F for approximately 10 minutes.
NOTE:
If using solid shortening, once it has melted, stir the shortening to eliminate any solid shortening in cold
zone of the fry tank.
3.
Open the drain valve to the fryer section in need of filtering and drain the shortening into filter tank.
A.
Drain valve interlock contacts open and the position of the drain valve is indicated to the cooking control.
NOTE:
If using solid shortening, allow hot shortening to stand in filter tank for approximately 6 minutes prior to
filtering.
4.
Turn filter switch on cooking controls to ON.
A.
R1 pump motor relay coil (24VAC) is energized and both sets of N.O. contacts close.
NOTE:
Jumper wire number 24 connects one set of R1 N.O. contacts to R2 COM.
1)
Fill solenoid valve is energized (120VAC) thru R2 fill relay N.C. contacts and valve opens.
2)
Pump motor is energized (120VAC) and pump circulates shortening through filtering system.
5.
When filtering is completed, close the drain valve and allow the fry tank to refill.
A.
Drain valve interlock contacts close and the position of the drain valve is indicated to the cooking control.
6.
When all filtered shortening is returned to the fry tank, turn filter switch on cooking controls to OFF.
A.
Power is removed from fill solenoid valve and pump motor.
NOTE:
If using solid shortening, when all filtered shortening is returned to the fry tank and pump motor is off,
open the filter drawer approximately one inch. Allow the remaining shortening in the line to drain into the filter
tank to prevent possible clogging after the shortening cools and solidifies. Close the filter drawer when
complete.
F25377 (March 2010)
Page 23 of 36
