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| Maintenance & Cleaning
Chapter 8
|
8-49
304243H02
3. Remove the eight corner screws from the back furnace panel. Locate the
thermocouple (in Figure 3).
NOTE There are wires connecting the back panel to the furnace. Be careful to place
the back panel next to the furnace without disturbing these wires.
4. Note polarity and thermocouple wire location. Remove the terminal screws and
remove the thermocouple lead wires. Refer to Figure 7 "Wiring Diagram (TF55030,
TF55035)".
5. Remove the thermocouple mounting screws.
6. Pull the thermocouple straight out of the heating unit.
NOTE The thermocouple could be damaged if it is not pulled out carefully.
7. Slide the new thermocouple straight into the heating unit and replace the mounting
screws.
8. Connect the thermocouple lead wire to the terminal screws on the thermocouple. Be
careful not to bend the thermocouple wire. Red is always negative. (If the extension
leads are black and white, white is negative). Refer to Figure 7 "Wiring Diagram
(TF55030, TF55035)" for additional wiring information.
9. Replace the furnace rear panel.
NOTE Inspect all wire connections before reassembling the back panel.
WARNING : Failure to check all wire connections may cause damage to the unit.
Figure 3 Thermocouple Replacement
Mini-mite Tube Furnace
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