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ADJUSTMENTS MODEL 300 RESTAURANT RANGES
To check oven temperatures when recalibrating, use a test instrument or a reliable mercury thermometer.
Place the thermocouple of test instrument or the thermometer in the middle of the oven.
Proceed as follows:
1. Remove dial and push out metal insert (see illustration below).
2. Replace dial, turn to 400 mark, and light oven burner.
3. After burner has been on about 15 minutes check oven temperature. Oven door should be open for as
short a time as possible. Use a flashlight, if necessary, to see the thermometer clearly.
4. Continue to check temperature, at 5-minute intervals, until two successive readings are within 5 degrees
of each other.
The control should be recalibrated if your reading is not within 20 degrees of the dial setting (400 degrees). If
calibration is required, the additional steps to be taken are these:
5. Hold dial firmly, insert screwdriver through center of dial, and push calibration stem inward (see
illustration below). DO NOT TURN THIS STEM.
6. While holding calibration stem in firmly with screwdriver, turn dial until it is set at the actual oven
temperature as shown by your test instrument or thermometer. Release pressure on calibration stem.
Replace dial insert.
7. Set dial at 450 mark. Check oven temperature again, as instructed in (3) and (4). If the oven temperature
is not within 20 degrees of the dial setting (450 degrees), it means that the sensing element is
inoperative and the control should be replaced.
Oven Thermostat Control Adjustment
ADJUSTMENTS
PAGE 26 OPERATOR’S MANUAL 1182298 REV 3