# 8 2 9 O p e r a t i o n & C a r e M a n u a l •
3.
The cabinet is equipped with a special, low-heat-density,
heating cable. Through the Halo Heat concept, the heating
cable is mounted against the walls of the warming compartment
to provide an evenly applied heat source controlled by a
thermostat. The design and operational characteristics of the
cabinet eliminates a heat circulating fan. Through even heat
application, the quality of a food product is maintained for
many hours.
Whenever the thermostat is turned up, the indicator light will
indicate 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 go on after normal
start-up, the main power source, thermostat, and/or the light
must be checked. If a warming compartment does not hold the
temperature as dialed, the calibration of the thermostat must be
checked. (See the paragraph on thermostat calibration.) If a
warming compartment fails to heat or heats continuously with
the thermostat OFF, the thermostat must be initially checked for
proper operation. If all is in order, a continuity and resistance
check of the heating cable should be made.
(See the circuit diagram.)
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 displaces the accuracy of the
thermostat calibration.
A thermostat should be checked or recalibrated by placing a
quality temperature indicator at the center of an empty warming
cavity. DO NOT CALIBRATE WITH FOOD PRODUCT IN THE
WARMING CABINET. The temperature must be allowed to
stabilize at one particular setting for at least one hour. The
center of the thermal swing of the cavity temperature should
approximately coincide with the thermostat setting.
The calibration screw of the thermostat is located in the dial
shaft, and should be adjusted with great care and caution. With
the shaft held stationary, a very slight clockwise motion of the
calibration screw
APPRECIABLY
lowers the thermostat setting
while a reverse, counter-clockwise motion results in the opposite
condition. After achieving the desired cycling of the thermostat,
the calibration screw must be sealed in place with a few drops of
sealant. [Red nail polish or equivalent is acceptable.]
24-1/4"
(616mm)
1-1/4"
(32mm)
38"
—
(965mm)
29-3/4"—(756mm)
29"
(737mm)
3/4"—(19mm)
6-3/4" (171mm)
FOR
LEGS
750-GDR
ALTO-SHAAM
12-1/8"
—
(308mm)
CORD LOCA
TION
31-3/4"—(806mm)
1"
—
(25mm)
E X T E R I O R
D I M E N S I O N S
T H E R M O S TAT C A L I B R AT I O N
C A B I N E T C H A R A C T E R I S T I C S
T H E R M O S TAT
a n d L I G H T S E Q U E N C E
Disconnect Cabinet from the
Power Source
Before Cleaning or Servicing
