To Replace Door Switches - Barnstead FB1300 Operation And Repair Manual And Parts List

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AINTENANCE AND ERVICING
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14. To remove top insulating piece and
hearth collar, position the furnace on
its side. Remove both objects from fur-
nace.
15. Reposition furnace on its top.
Reinsert new hearth collar and the
new top piece of insulation. Insert the
new side pieces of insulation last.
16. Reinsert element and hearth plate unit
into the chamber, pushing it firmly
against the hearth collar. (Be careful
not to damage insulation.)
17. Reinsert new bottom piece of insula-
tion over hearth plate. (Element leads
and ceramic bushings should be
exposed above insulation bottom
piece.)
18. Thread the element leads and ceramic
bushings through the bottom plate.
Bend the leads so they lie close to the
refractory plate and the bottom insula-
tion block. (The easiest and safest
way to do this is to press the wire flat
with a stick or blunt pusher. Do not
use a sharp object or nick the wire.)
Secure plate to furnace chamber.
19. Reverse steps 1-9 to reassemble fur-
nace.

To Replace Door Switches

1. Turn furnace upside down and remove
bottom cover.
2. Disconnect wires from door switches.