24
Maintenancing and Servicing
To Replace Vestibule End Caps
a.
Disconnect furnace from power supply.
b
Remove the metal end cap.
c.
Remove old vestibule. Insert the new vestibule, aligning
the two holes in the vestibule with the holes on the bracket.
d.
Before pushing the metal end caps back onto the chamber,
insert the two screws through the holes in the metal end
cap and vestibule. Then, start the two screws into the
holes in the bracket two or three turns, push the metal end
cap onto the chamber and finish tightening the two screws.
e.
Reconnect furnace to power supply.
To Replace Heating Element
a.
Disconnect furnace from power supply.
b.
Disconnect the cord from furnace chamber to control base.
Identify the color and placement of the thermocouple
extension wires and disconnect from control base.
c.
Remove furnace chamber from the bracket.
d. Remove both end caps and vestibules of furnace chamber.
e.
Remove terminal plate with four screws to expose wiring.
(Note placement and connection of thermocouple and ele-
ment wires.)
f.
Remove two element lead wires from terminal block. Also,
remove thermocouple by removing two screws on terminal
block then pulling it straight back.
g.
Remove the four screws that secure heating element tube
inside the case, then slide out the old heating element
tube.
h. Insert new heating element tube and thread each element
lead wire through the brass bushings.
i.
Secure heating element tube to case.
j.
Reinstall thermocouple and connect thermocouple and new
element lead wires to terminal block.
k. Replace terminal plate.
l.
Insert the screw on the terminal plate through the mounting
bracket and secure with knob.
m. Replace both end caps and vestibules.
n. Reconnect power cord from furnace chamber to control
base.
o. Reconnect thermocouple extension wires to control base
Maintenancing and Servicing
Note
Perform only maintenance
described in this manual. Contact
an authorized dealer or our factory
for parts and assistance.
