35
To Replace a Heating Element
1. Disconnect the furnace from the power sup-
ply.
2. Remove the back terminal cover of the fur-
nace. (Note placement and connection of
wires.)
3. Loosen the nuts on the terminal points of
the four heating element lead wires and
remove the element wires from the termi-
nals.
4. Loosen the thermocouple hold-down clip
and carefully remove the thermocouple from
the rear of the furnace chamber.
5. Remove both the back of the furnace and
the blanket insulation.
6. Grasp the element lead wires and pull out
both elements and the back chamber insula-
tion.
7. Replace the defective element.
8. Reverse the disassembly procedure, making
sure you thread all element lead wires
through the insulating porcelain bushings on
the back of the furnace and cut off any
excess element lead wire after securing the
leads to the terminal points.
9. Reconnect the furnace to the power supply.
10. Test the operation of the furnace.
Maintenance and Servicing
Note
The ceramic hearth collar may crack.
This is a normal condition and will not
affect the performance of the hearth col-
lar.
Warning
To avoid electrical shock, this furnace
must always be disconnected from the
power supply prior to maintenance and
service.
Perform only maintenance described in
this manual. Contact an authorized deal-
er or our factory for parts and assistance.
Refer servicing to qualified personnel.
Summary of Contents for 5300A20/F48025-TS
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