Convection Oven - Vulcan-Hart GH30 Service Manual

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. Recalibrate the control if your reading is not within 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. If 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
calibration plate to the proper location, reassemble screws in the other tapped holes designed for
them.

Convection Oven

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
1
(Fig. 6); / turn of Screw "A" represents a temperature shift of 35°F.
4
Fig. 5
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