Barnstead FB1415M - To Replace Door Switches

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MAINTENANCE AND SERVICING
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 insulation 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 furnace.
To Replace Door Switches
1. Place furnace upside down and remove bot-
tom cover.
2. Disconnect wires from door switches. Identify
or mark wires disconnected from door switch-
es to ensure proper placement and connec-
tion when reinstalling.
3. Remove two screws and nuts from door
switches and slide door switches out.
4. Install new door switches to bracket. Place
furnace in an upright position. Adjust door
switches until a click is heard from the
switches, when furnace door is approximate-
ly 2" from being completely closed. Secure
door switches to bracket.
5. Place furnace upside down. Reconnect the
wires to new door switches.
6. Replace bottom cover and place furnace
upright.
7. Reconnect furnace to power supply.
8. Test operation of door switches as
described in step 4.
Warning
Disconnect furnace from power
supply before servicing.