Alto-Shaam 1000-TH-I Se Rvi Ce, Thermosta T/P Ilot Ligh T Sequenc E, Ther Mostat Calib Ration

SE RVI CE

THERMOSTA T/P ILOT LIGH T SEQUENC E

Whenever the thermostat is turned “ON”, the indicator light will indicate the power ON/OFF condition of the heating cable, and consequently , the cycling of the cabinet as it maintai ns the dialed cavity temperature. If this light does not illuminate after normal start-up, the main power source, thermostat, and/or light must be checke d. 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 thermos tat “OFF”, the thermostat must be initially checked for proper operation. If these items are checked and found to be in order, a continuity and resistan ce check of the heating cable should be made.

SEE CIRCUIT DIAGR AM.

DA NGE R

DIS CONNECT UNI T FROM

POWER SOURCE BEF ORE

CLEANI NG OR SER VICING .

THER MOSTAT CALIB RATION

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 thermosta t with a sensing bulb operates on hydraul ic 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 counte r- 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.)

PG. 14 1000-TH-IINST ALLAT IO N/OPERATI ON/SER VICE MA NUAL