Temperature Control Recalibration

SERVICE & PARTS H SERIES

STANDARD OVEN TEMPERATURE CONTROL RECALIBRATION

Field recalibration is seldom necessary and should not be resorted to unless experience with cooking results definitely proves that the control is not maintaining the set temperature. To check oven temperatures when recalibrating, use a Robertshaw Test Instrument or a reliable mercury oven thermometer.

1.Place thermocouple of test instrument or thermom- eter in the middle of the oven. Close oven door.

2.Light main burner.

3.Turn dial to any temperature setting and allow oven to heat until flame cuts down to bypass. Let cycle several times.

4.After burner has been on sufficiently long enough to cut down the bypass flame, check oven temperature.

The control should be recalibrated if your reading is not with 15° F of the dial setting. If recalibration is required, proceed as follows:

5.Remove dial.

6.With a screwdriver, loosen the two calibration screws (Fig. 5) until calibration plate moves independently of the control.

7.Turn calibration plate until mark corresponding to test instrument or thermometer reading is in line with center of pointer “A” (Fig. 5), and while holding in this position, tighten calibration screws firmly.

8.Replace dial.

9.NOTE: If the above adjustment is prevented by the two loosened calibration screws being in contact with the ends of the screw clearance slots in the calibration plate, remove the screws, and after turning the cali- bration plate to the proper location, reassemble screws in the other tapped holes designed for them.

Fig. 5

CONVECTION OVEN TEMPERATURE CONTROL RECALIBRATION

1.Place thermocouple of test instrument in middle of oven. Close oven door.

2.Light the main burner by turning thermostat dial to any temperature setting.

3.Allow oven to heat until flame cuts off. After several

cycles, check temperature. If the temperature does not read within 15° F of the dial setting, recalibrate as follows:

4.Pull dial straight off dial shaft without turning (Fig. 6).

5.Turn screw “A” clockwise to decrease temperature and counterclockwise to increase temperature (Fig. 6).

NOTE: 1⁄4 turn of Screw “A” represents a temperature shift of 35° F.

Fig. 6

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7800, SG7800 specifications

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