Despatch LCC1-87NV-2 - Manual (Page 38)

29
Thermocouple Break Protection
If the thermocouple breaks, the control instrument will shut off power to the heater,
preventing excessive temperature in the chamber.
Replacing the Thermocouple
(Tools needed: Small screwdriver and small crescent wrench)
The controller thermocouple is type J (iron/constantan) and is replaceable using the
following procedure:
1.
Disconnect power and remove screws from the face of the control panel and
slide it forward.
2.
Locate thermocouple along the left side of the control chamber.
3.
Loosen the nut on the fitting holding the thermocouple in place.
4.
Pull thermocouple out of brass fitting.
5.
Feed new thermocouple through the nut and ferrule and place back into the
fitting.
6.
Re-tighten the fitting nut.
7.
Remove old thermocouple from terminals on the CONTROL and HIGH LIMIT
instruments.
8.
Attach new thermocouple leads to the proper terminals of the CONTROL and
HIGH LIMIT instruments.
9.
Replace oven control panel.