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VL SERIES STEAMER - SERVICE PROCEDURES AND ADJUSTMENTS
Pa
g
e 36 of 88
THERMAL SWITCH - PREVENT
AND AUTOMATIC MODELS
The load compensator is a thermal switch in a
stainless steel housin
g
that screws into a 3/8 NPT
fittin
g
(newer models) on the left side wall of the
compartment. The switch contacts should close
when the compartment temperature reaches 180 F,
supplyin
g
power to the steam exhaust solenoid
valve, pilot li
g
ht and cookin
g
timer motor.
1.
Newer Models
A. This switch is NON-ADJUSTABLE. Check
to see if the switch is operatin
g
properly as
described below. If the switch is suspected
to be malfunctionin
g
, replace it and check
for proper operation.
2.
Older Models
A. The switch can be adjusted by turnin
g
the
slotted screw. Turn the screw clockwise
to
lower the closin
g
temperature and
counterclockwise
to raise the closin
g
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 usin
g
a di
g
ital
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 li
g
ht of the compartment switch
should li
g
ht when the thermocouple reads
185 ±7 F.
B. After the cookin
g
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 cookin
g
cycle is started normally, but
the red li
g
ht and timer do not come on or
an abnormal amount of time elapses
before they come on, then the load
compensator is set too hi
g
h. Also, if the
timer stops, the red li
g
ht
g
oes 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 startin
g
and the red li
g
ht comin
g
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
ASSEMBLY
1. Close the valve at the top and at the bottom of
the
g
au
g
e assembly.
2. Unscrew the packin
g
nuts at the top and bottom
of the
g
lass tube.
3. Slide the
g
lass tube upwards, until the bottom
of the tube is clear of the fittin
g
and lift it out.
4. Reinstall the tube and use new sealin
g
washers. Do not over ti
g
hten the packin
g
nuts,
it could break the
g
au
g
e
g
lass.
5. Open the top and bottom valves fully.
6. Check for proper operation.