Fig. 69
Fig. 70
SEQUENCE OF OPERATION - A
SERIES - AFTER 12/1/12
Refer to the schematic diagrams for Analog Control
operation.
NOTE: If the Solid/ Liquid switch is set to Solid, the
control will cycle the heat on and off in short intervals
until the shortening is heated to 135°F.
Melt Cycle times
Liquid 8 sec on and 18 sec off
Solid 16 sec on and 18 sec off
1. Conditions:
A. Fryer connected to correct supply voltage
and properly grounded.
B. Incoming gas supply is on and manual gas
valve turned on.
C. Power switch to the fryer section in the off
position.
D. Solid/Liquid switch set to correct position.
E. Shortening at proper level in fry tank and
below last set point temperature used.
F. Manual drain valve closed (drain valve
interlock switch N.O. is closed).
G. High limit thermostat closed.
2. Turn power switch on.
A. 24VAC transformer energized.
3. Analog control is powered 24VAC.
4. Start switch is closed (momentary).
5. If shortening temp is below 135°F then melt cycle
will operate.
6. Temperature goes above 135°F and control calls
for heat.
A. 3 sec prepurge.
B. Spark sent to igniter.
• 7 sec trial for ignition. If flame not
detected after 8 sec, Lockout.
NOTE: System remains locked out until the power
switch is cycled to reset system and restart trial for
ignition cycle. (Wait 5 minutes for gas to dissipate)
• 2 sec after flame detected, burner
blower motor in low speed and low fire
initiated.
C. Once burner flame is present, burner blower
motor goes from low speed to high speed.
D. Ignition module provides ignition status
input signal to control.
7. Cooking control evaluates input signals from:
Ignition status, drain valve interlock, and
temperature probe.
A. Ignited burner heats shortening in fry tank.
NOTE: As long as the ignition module senses a flame,
the internal main voltage (MV) contacts (N.O.) on the
ignition module remain closed, and the gas valve
stays on.
8. Shortening reaches set temperature.
A. Cooking control de-activates heat output
(24VAC).
1) Gas valve coil de-energized and valve
closes.
2) Gas flow stops and burner goes out.
9. When fryer calls for heat again, ignition sequence
will begin at step 6A.
VK and TR GAS FRYERS W/Wo KleenScreen PLUS - ELECTRICAL OPERATION
F45474 (0413) Page 42 of 55
