Lang FCOF-AT, Installation, Operation And Maintenance Instructions

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14
MAINTENANCE & CLEANING
CALIBRATION
Calibration Check
Place thermometer or thermocouple in the center of oven cavity.
Set thermostat to 350
°
F.
Allow the oven to Preheat for at least half an hour.
Note cycle on temperatures and cycle off temperatures for 3 cycles. (Red indicator light
indicates when oven is calling for heat)
After 3 cycles average the temperature. (Add all six temperatures and divide by 6)
Calibration Adjustment
A 1/16” flat blade screwdriver with a 2” shaft is required to make adjustments on the
thermostat.
Maintain the oven temperature at 350
°
F.
Without turning the thermostat, remove the knob.
Locate the adjustment screw at the base of the shaft and insert the screwdriver.
Grasp the shaft and turn the screw. Counter clockwise to increase and clockwise to
decrease (1/8 of a turn will move the temperature 5-7
°
in either direction).
Reinstall the oven knob and recheck the oven temperature.
REMOVAL INSTRUCTIONS
Thermostat, Contactor, Transformer, and Switch
These parts are located behind the control panel assembly on the right hand side of the
oven. To access control panel secure unit from power, remove the vent knob and the
seven screws around the outside of the control panel assembly. Slowly pull the control
panel toward you until the component is accessible.
Thermostat
Secure oven from power. Inside the oven, remove the fan baffle and the retaining clips
holding the thermostat capillary tube to the inside of the oven. Feed the bulb through the
oven wall into the control panel area. Pull out control panel as previously outlined.
Remove the wires from the old thermostat and attach to the corresponding terminal of
the new thermostat. Remove knob and two screws that hold the thermostat to the oven
control panel. Discard old thermostat. Reinstall the thermostat and capillary tube into
oven and the control panel and restore power to the oven. Test for proper operation.
Contactor and Switch
Pull out control panel as previously outlined. Remove the wires from the contactor or
switch being changed. Place those wires on the corresponding terminal of the new
contactor or switch. Remove old contactor or switch and mount new contactor or switch
with wires attached. Discard old contactor or switch. Reinstall the control panel and
restore power to the oven. Test for proper operation.
Transformer
Pull out control panel as previously outlined. Remove the wires from the old transformer.
Place the wires on the corresponding terminal of the new transformer. Remove old
transformer and mount new transformer with wires attached. Discard old transformer.
Reinstall the control panel and restore power to the oven. Test for proper operation.