SEQUENCE OF OPERATION D AND
C SERIES
Refer to SCHEMATIC AI3495 for Cooking Control
operation.
NOTE:
If using solid shortening, the control should be
programmed to use the melt cycle. In the melt cycle,
the control will cycle the heat on/off in short intervals.
This will gradually heat and liquify the shortening until
it reaches 135°F. Melt cycle default times in seconds
are:
Melt Cycle Times
Liquid
L = 16 on, 18 off
Solid
S = 8 on, 26 off (default for gas)
No Melt
0 = 100% on
On solid state controls only, CY (cycle) is displayed
before the shortening letter designation and zero
represents no melt.
The control then resumes normal operation as
described in this sequence.
1.
Conditions.
A.
Fryer connected to correct supply voltage
and properly grounded.
B.
Gas supply and gas combination valves are
on.
C.
Power switch to the fryer section in the off
position.
D.
Shortening at proper level in fry tank and
below last set point temperature.
E.
Desired shortening selected. (Solid/Liquid)
F.
Cooking control is setup properly and ready
to use.
G. Manual drain valve closed (drain valve
interlock switch N.O. is closed).
H.
High limit thermostat closed.
2.
Turn power switch on.
A.
Power to terminal 5 (COM) on left and right
basket relays.
B.
24VAC transformer energized.
3.
Cooking control powers on, initializes and
performs a diagnostic self check.
NOTE:
If cooking control passes diagnostic self
check, the output signals are turned on and operation
sequence continues. If cooking control does not pass
diagnostic self check, the control displays an error
message for the problem, disables keypad and
sounds the electronic alarm continuously. Refer to
SOLID STATE CONTROL ALARMS OR COMPUTER
CONTROL ALARMS.
4.
24VAC to P5 of interface board.
5.
Control calls for heat.
A.
25 VDC to P3 on interface board.
B.
Triac on interface board supplies 24VAC to
ignition module to P6 on interface board.
6.
If shortening temp is below 135°F then melt cycle
will operate.
7.
Temperature goes above 135°F and control calls
for heat.
A.
3 sec prepurge.
B.
Spark sent to igniters.
•
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.
8.
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.
9.
Shortening reaches set temperature.
A.
Triac on Interface Board de-energized.
1)
Gas valve coil de-energized and valve
closes.
2)
Gas flow stops and burner goes out.
10. When fryer calls for heat again, ignition sequence
will begin at step 5A.
11. If fryer is left idle, the ignition sequence changes.
VK and TR GAS FRYERS W/Wo KleenScreen PLUS - ELECTRICAL OPERATION
Page 43 of 55
F45474 (0413)
