Lang RF21S-A, Service Manual

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8
RANGE TOP
Consists of the various top arrangements, depending on specific model purchased:
12" x 24" hot plate controlled by high temperature thermostats. Temperature ranges from 0
°
-800
°
.
Recommended: Stock pots and heavy kettle work.
Round French Plates, controlled by indicating type 6-heat switch. Temperature ranges from 0
°
-750
°
.
Recommended: Light duty sauce pans and small stockpots. Not Recommended: Heavy stock pots, or heavy
urns, or kettles.
36" x 24" or 24" x 24" grill plates, controlled by thermostats. Temperature ranges from 0
°
-450
°
.
Recommended: All heavy and light frying. Set the thermostat dial at the desired temperature. The red pilot
light will be on until the desired temperature is reached. The pilot light indicates when the plate is heating.
CARE AND CLEANING
The range should be thoroughly cleaned at least once a week in addition to the normal daily cleaning to insure
against the accumulation of foreign material. Keep inside of oven and metal deck clean, particularly around
door opening, door edges and at bottom of door opening so that the door may close tightly. CAUTION: ANY
OVEN CLEANER USED SHOULD BE MARKED: "SAFE ON ALUMINUM".
Keep-drip pans under range top plates clean.
Keep hotplate and griddle surfaces clean.
Outside of range and top should be kept clean.
Electric equipment is inherently clean and sanitary, but may become unsanitary if dirt is allowed to accumulate
on it. Take advantage of the clean, sanitary features of electric equipment, give it the regular attention that it
deserves the same as any other highly perfected machinery, to insure best results and continued high operating
efficiency.
CALIBRATION
Calibration Check
¾ Place thermometer or thermocouple in the center of oven cavity.
¾
Set thermostat to 350
°
and place both 3-heat switches in the “HIGH” position.
¾ Allow the oven to Preheat for at least half an hour.
¾ Note cycle on temperatures and cycle off temperatures for 3 cycles. (Red indicator light indicates when
oven is calling for heat)
¾ After 3 cycles average the temperature. ( Add all six temperatures and divide by 6)
Calibration Adjustment
¾ A 1/16” flat blade screwdriver with a 2” shaft is required to make adjustments on the thermostat.
¾ Maintain the oven temperature at 350
°
.
¾
Without turning the thermostat, remove the knob.
¾ Locate the adjustment screw at the base of the shaft and insert the screwdriver.
¾ Grasp the shaft and turn the screwdriver. Counter clockwise to increase and clockwise to decrease.
(1/8 of a turn will move the temperature 5-7
°
in either direction.)
¾ Reinstall the oven knob and recheck the oven temperature.