Wolf WKGX 126623, WKGC 126622 Solid State Temperature, Mechanical Thermostat Calibration WKG/WKGX

FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS

MECHANICAL THERMOSTAT CALIBRATION (WKG/WKGX)

1.Place a thermocouple in the geometric center of the oven cavity.

2.Set the ON-OFF-OVEN COOL switch to ON.

3.Set the thermostat dial to 350°F.

4.Allow the oven temperature to stabilize (normally 3 cycles).

5.Record the temperature when the thermostat cycles OFF and ON for at least three complete cycles.

6.Calculate the differential by subtracting the temperature indicated when heat lamp goes out from temperature indicated when heat lamp comes on.

A.The differential calculated should be less than 30EF.

1)If the differential is less than 30° F, the thermostat is functioning properly.

a.Proceed to step 7.

2)If the differential is more than 30EF, the thermostat is malfunctioning.

a.Install a replacement thermostat and check calibration.

7.Calculate the average temperature by adding the temperature indicated when the heat lamp goes out to the temperature indicated when the heat lamp comes on and dividing this answer by 2.

A.If the average temperature is less than

15EF from the dial setting, the thermostat is properly calibrated.

B.If the average temperature is more than 15EF of the dial setting, the thermostat calibration must be adjusted.

1)Remove the thermostat knob.

2)Hold the thermostat shaft and turn the inner set screw clockwise to decrease temperature or counterclockwise to increase temperature (1/4 turn = 35EF).

8.Replace the knob and repeat step 7 until the average temperature is within tolerance.

NOTE: Allow the oven to cycle at least two times between adjustments before performing the calculation.

9.If the above adjustment can not be obtained, install a replacement thermostat and check calibration.

SOLID STATE TEMPERATURE

CONTROL TEST (WKGD/WKGDX)

WARNING: DISCONNECT THE

ELECTRICAL POWER TO THE

MACHINE AND FOLLOW LOCKOUT /

TAGOUT PROCEDURES.

1.Remove the right side panel as outlined under COVERS AND PANELS in REMOVAL AND REPLACEMENT OF PARTS.

NOTE: If right side panel is not accessible, this component can be serviced by removing the control panel as outlined under COVERS AND PANELS.

2.Place a thermocouple in the geometric center of the oven cavity.

NOTE: Oven temperature must be below 450°.

NOTE: If oven is equipped with the Roast and Hold option, turn it to Normal ROAST (normal cooking) before continuing.

3.Set the temperature control to the maximum setting.

Page 19 of 64 F32700 (February 2006)