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VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
THERMAL SWITCH - PREVENT
AND AUTOMATIC MODELS
The load compensator is a thermal switch in a
stainless steel housing that screws into a 3/8 NPT
fitting (newer models) on the left side wall of the
compartment. The switch contacts should close
when the compartment temperature reaches 180 F,
supplying power to the steam exhaust solenoid
valve, pilot light and cooking timer motor.
1.
Newer Models
A.
This switch is NON-ADJUSTABLE. Check
to see if the switch is operating properly as
described below. If the switch is suspected
to be malfunctioning, replace it and check
for proper operation.
Older Models
2.
A.
The switch can be adjusted by turning the
slotted screw. Turn the screw clockwise to
lower the closing temperature and
counterclockwise to raise the closing
temperature. Check the operation of the
switch as described below. These models
are ½ NPT.
The correct adjustment or verification of the load
compensator can best be made by using a digital
thermometer and thermocouple to sense the
compartment temperature.
1.
Position the thermocouple near the exposed
bulb of the load compensator inside the
compartment.
2.
Close and seal the compartment. Pull the
steam control arm handle forward, set the timer
and turn the compartment power switch ON.
3.
Monitor the thermocouple temperature, and
adjust or verify (as applicable) the load
compensator temperature.
A.
The red light of the compartment switch
should light when the thermocouple reads
185 ±7 F.
B.
After the cooking cycle ends and the
compartment temperature lowers, the
thermal switch should then re-open at
165 ±7 °F.
C.
If the load compensator can not be
adjusted correctly or the temperature is
out side the allowable limits, then replace
thermal switch and check for proper
operation.
D.
If the cooking cycle is started normally, but
the red light and timer do not come on or
an abnormal amount of time elapses
before they come on, then the load
compensator is set too high. Also, if the
timer stops, the red light goes out, and the
buzzer does not sound after the
compartment has exhausted the steam or
if the time is set as usual for the product
and the product is overcooked or if the
time is set as usual for the product and the
product is overcooked.
E.
If there is too short a time between starting
and the red light coming on, or if it comes
on immediately, the load compensator is
set too low. Also, if the time is set as usual
for the product and the product is
undercooked.
WATER LEVEL GAUGE
1.
Close the valve at the top and at the bottom of
the gauge assembly.
2.
Unscrew the packing nuts at the top and bottom
of the glass tube.
3.
Slide the glass tube upwards, until the bottom
of the tube is clear of the fitting and lift it out.
4.
Reinstall the tube and use new sealing
washers. Do not over tighten the packing nuts,
it could break the gauge glass.
5.
Open the top and bottom valves fully.
6.
Check for proper operation.
Page 36 of 88
ASSEMBLY
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