Alto-Shaam 767-SK Series Operation And Care Manual - Page 6

Browse online or download pdf Operation And Care Manual for Oven Alto-Shaam 767-SK Series. Alto-Shaam 767-SK Series 12 pages. Low temperature cook, hold, smoke ovens
Also for Alto-Shaam 767-SK Series: Installation Operation & Maintenance (16 pages), Specifications (2 pages), Brochure & Specs (4 pages), Specifications (2 pages), Installation, Operation And Maintenance Manual (19 pages)

Print Page

THERMOSTAT & PILOT LIGHT

SEQUENCE

Whenever the start-up procedure has been completed, the

indicator light will indicate the power ON/OFF condition of the

heating cable and consequently, the cycling of the oven as it

maintains the dialed cavity temperature. If the indicator light

does not indicate after normal start-up, the main power source

and/or the main power breaker, and/or the oven's control cir-

cuitry must be checked. If a oven compartment does not hold the

temperature as dialed, calibration of the thermostat must be

checked. (See the paragraph on thermostat calibration.) If a

cooking compartment fails to heat or heats continuously with the

thermostat off, the thermostat must be initially checked for prop-

er operation. If all is in order, a continuity and resistance check of

the heating cable should be made. (See the circuit diagram.)

DISCONNECT CABINET FROM

THE POWER SOURCE BEFORE

CLEANING OR SERVICING.

T R O U B L E S H O O T I N G C H E C K L I S T

TROUBLE

Unit does not operate.

Cooking temperature not correct.

Holding temperature not correct.

Timer runs down, but oven will not

go into HOLD.

Cook thermostat erratic — will not

hold calibration.

Hold thermostat erratic — will not

hold calibration.

Oven goes from cooking temperature

to cold.

Oven will not go into cook cycle when

timer and cook thermostat are ON.

It takes too long to cook

(temperature O.K.).

Cannot control temperature but

thermostats check O.K.

T H E R M O S TA T C A L I B R A T I O N

2 5 0 ° F

A T

The thermostat is precision calibrated at the factory.

Normally, no adjustment or recalibration is necessary unless

the thermostat has been mishandled in transit or 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 oven

cavity. DO NOT CALIBRATE WITH FOOD PRODUCT IN

THE OVEN. The temperature must be allowed to stabilize at

one particular setting for at least two hours. 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. With the shaft held stationary, a minute clockwise

motion of the calibration screw appreciably lowers the thermo-

stat setting while a reverse motion results in the opposite condi-

tion. After achieving the desired cycling of the thermostat, the

calibration screw must be sealed in place with a few drops of

sealant. (R

POSSIBLE CAUSE

Insufficient electric power unit.

Defective plug or cord.

Power switch defective.

Cook thermostat out of calibration.

Hold thermostat out of calibration.

Timer not de-energizing cook circuit.

Cook thermostat.

Hold thermostat.

Timer or contactor.

Heating element open, resulting in

low wattage.

Heating element grounded.

#834 Operation & Care Manual - 5.

( 2 1 2 ° C )

1 4 0 ° F ( 6 0 ° C )

C O O K

A N D

ED NAIL POLISH OR EQUIVALENT IS ACCEPTABLE

Check power source.

Check and repair if necessary.

Replace.

Calibrate.

Replace timer.

Replace thermostat.

Replace hold thermostat.

With timer turned ON, line

voltage should appear across

term. 2 and 3 of timer. If not,

replace timer.

If line voltage does appear

across term. 2 and 3 of timer, it

should also appear across

holding coil of contactor.

If line voltage does appear

across holding coil, and it

won't close its contacts,

replace contactor.

Replace element.

H O L D

REMEDY