Specifications

connection of wires).

3. Remove clip holding thermocouple in place (1

screw) and remove the two screws on the ther-

mocouple terminals.

4. Remove the thermocouple. Pull thermocouple

straight out of hole in the chamber first to avoid

damage to the insulation.

5. Guide the looped ends of the new thermocouple

through the plastic bushings with the red (-) lead

to the right as you face the back of the furnace.

6. Form a 90° bend, towards the furnace, between

the 2" long and 1” long ceramic insulators with

the red (-) lead to the right. Insert the thermo-

couple straight through the hole in the chamber.

7. Secure the thermocouple with clip and screw.

Connect the looped ends of the thermocouple to

the terminals with + to + (yellow wire).

Chromel/Alumel thermocouples and lead wire

are easily tested with a magnet. The non-mag-

netic wire is positive (+) and the magnetic wire

is negative (-).

8. Replace both back covers.

9. Reconnect to power supply. Test operation of

furnace.

To Replace Solid State Relay

1. Disconnect furnace from power supply.

2. Remove back control cover. (Note connection

and placement of wires to relay).

NOTE: For basic automatic control models,

remove both the back cover and the front con-

trol panel to provide access to solid state relay.

3. Disconnect wires from terminals. Identify or

mark wires.

MAINTENANCE AND SERVICING