#821 Operation and Care Manual • 3.
T H E R M O S TAT a n d
P I L O T L I G H T S E Q U E N C E
Whenever the thermostat is turned “
ON
,” the indicator
light will show the power
ON/OFF
condition of the heating
cable, and consequently, the cycling of the cabinet as it
maintains the dialed cavity temperature. If the light does
not illuminate after normal start-up, the main power source,
thermostat, and/or pilot light must be checked. If the
warming cabinet does not hold the temperature as dialed,
the calibration of the thermostat must be checked. If the
warming cabinet fails to heat or heats continuously with the
thermostat “
OFF
,” the thermostat must be initially checked
for proper operation. If these items are checked and found
to be in order, a continuity and resistance check of the
heating cable should be made.
SEE CIRCUIT DIAGRAM.
T H E R M O S TAT C A L I B R AT I O N
The thermostat is precision calibrated at the factory.
Normally, no adjustment or recalibration is necessary unless
the thermostat has been mishandled in transit, changed or
abused while in service. A thermostat with a sensing bulb
operates on hydraulic pressure, consequently, any bending
of the bulb results in a change in its volume, and alters the
accuracy of the thermostat calibration.
A thermostat should be checked or recalibrated by placing a
quality, thermal indicator at the center of an empty holding
cavity.
DO NOT CALIBRATE WITH ANY FOOD
PRODUCT IN THE CABINET.
The thermostat should be
set, and should be allowed to stabilize at that setting for a
minimum of one hour. Following temperature stabilization,
the center of the thermal swing of the air temperature within
the cabinet should approximately coincide with the
thermostat setting.
If calibration is necessary, the calibration screw should be
adjusted with great care. The calibration screw of the
thermostat is located in the thermostat dial shaft. With the
shaft held stationary, a minute, clockwise motion of the
calibration screw appreciably lowers the thermostat setting.
A reverse, or counter-clockwise motion appreciably raises
the thermostat setting. After achieving the desired cycling
of the thermostat, the calibration screw must be sealed.
Place a few drops of enamel sealant directly on the
calibration screw.
(Red nail polish or equivalent is
acceptable.)
At no time should the inside or outside
of the cabinet be washed down, flooded with
water or liquid solution. Do not use water jet
to clean.
NEVER STEAM CLEAN.
Severe damage or electrical hazard could
result, voiding the warranty.
O U T S I D E D I M E N S I O N S
22-1/2" (572mm)
24-1/4" (616mm)
42-3/4" (1086mm)
63" (1600mm)
26-5/8" (676mm)
32-1/2" (826mm)
24-1/4" (616mm)
22-1/2" (572mm)
4" (102mm) Legs
500-PV; PVL
500-PV/PT; PVL/PT
if the power supply cord set is damaged,
replace with an Alto-Shaam cord set.
The use of any other cord may result in
electric shock or fire hazard.
Always disconnect from power source before
cleaning or servicing.
