5
L22-236 Rev 0 (04/03)
at a lower temperature. As can be seen from the chart a
greater variation can be tolerated at a lower tempera-
ture.
Gas Valve:
The gas valve has a dual 24 VAC operator and will
open when the correct voltage is supplied to the
operator. With 24 VAC applied to the PV (24 VAC)
connection, the pilot valve operator will open, allowing
gas to flow to the pilot.
With 24 VAC applied to the MV (24 VAC)
connection, the main valve operator will open,
allowing gas to flow to the main burners.
Hi Limit:
The hi - limit switch is a normally closed switch until
the temperature at the hi-limit bulb reaches 450°F ±
15°F.
WARNING!
This test should be performed by a qualified
technician only! Monitor the fryer closely. This
test will cause the oil to heat past the normal
operating temperature and can cause damage
to the machine and its operator if care is not
taken.
WARNING!
This test will cause the burners to run
continuously.
In order to test this switch it will be necessary to utilize
the temperature control hi-limit feature. Refer to
PM
Card FR015
for instructions on how to perform this
test.
If the switch does not trip between the prescribed limits
it is defective and should be replaced. Once tripped, the
switch cannot be reset until the oil has cooled to
approximately 400°F + 20°F. If the switch does not
reset after oil has cooled it is defective.
Drain Valve & Return Valve Switches:
These switches are a magnetically operated proximity
switches. When the Drain Valve handle is moved to the
open position, the Actuator will move away from the
switch causing the switch to open. When the Drain Valve
is closed the switch will close.
Opening the RED return valve handle will close the
proximity switch causing the "pump on" relay to be
energized. The pump will begin to pump. Closing
the return valve handle will open the proximity switch
causing the relay to de-energize and the pump will stop
pumping. These switches can also be checked with an
Ohm meter. When the switch is closed, you should have
continuity. The normal gap between the Actuator and the
Sensor switch on the valve handle is
1
/
8
" -
1
/
4
" (3 -
6mm).
Transformer:
The transformer is a multiple AC input voltage 24 VAC
output voltage and can be checked by reading the input
and output voltages. A quick check for 24 VAC can be
done at the relay board behind the front panel. The AC
indicator will be illuminated if the F1 fuse is good and the
board is receiving 24 VAC.
Ignition Module:
With a 24 VAC input at pin #6, the ignition module will
have a 24 VAC output from terminal 3(PV) and the ignitor
will spark until the module senses pilot flame or for ap-
proximately 90 seconds at which time the module will lock
out, whichever occurs first. When the module has proven
the pilot flame, it will have a 24 VAC output at terminal
1(MV) and put 24 VAC to pin 2 at connection J/P32 on
the relay board. The relay board will interrupt the 24 VAC
to the gas valve until the controller calls for heat.
