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Installing the New Furnace
1. Retrieve the new furnace and thermocouple assembly (PN 72691SE).
If replacing just the thermocouple, also do the following (Figure 7-4):
Figure 7-4. Thermocouple assembly.
Retrieve an anti-seize and lubricating compound (for example, NEVER
SEEZ catalog number NSB-4 from Bostik Chemical Group). Apply the
anti-seize compound to the inside diameter of the Swagelok body.
Retrieve a Neo-Lube No. 1 dry film conductive lubricant from Huron Industries,
Inc. and apply it to the following:
•
Both furnace holes
•
Captive screw on furnace bracket
•
Inside and outside of back and front ferrules
•
Inside of Swagelok nut
•
Threads of Swagelok body
Allow the lubricant to dry.
2
Insert the thermocouple with Swagelok nut and ferrules into the
Swagelok body as far as possible. Hand tighten the Swagelok nut.
Push the thermocouple stop against the Swagelok nut, then tighten
with a wrench one-quarter turn.
3
Place the new furnace into the furnace L-bracket; tighten the furnace cap-
tive screw. Make sure that the furnace sits against the "L" shape bracket.
4
As you put the furnace insulation cover back on the furnace, place the
thermocouple and furnace wires attached to the furnace through the
hole in the furnace insulation cover.
5
Reinstall the plate that fastens the furnace insulation cover to the fur-
nace by reversing the actions taken in Step 5 of removing the furnace.
6
Reconnect the thermocouple wires to TB2, TC+ and TC- on the back-
plane board. Yellow wire - TC+, Red wire -TC-.
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Parts Replacement
7-7
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