Installing The New Furnace - Ametek Dycor CG1100 Series User Manual

7.
8.
1.
Figure 7-5. Thermocouple assembly.
5.
6.
7.
8.
9.
7-6 | Dycor CG1100 Oxygen Analyzer
Loosen the captive screw on the furnace L-bracket until the furnace is
loosened from the L-bracket (see Figure 7-4).
Pull the furnace straight up and remove through the top of the analyzer.

Installing the New Furnace

Retrieve the new furnace (74260KE) and thermocouple assembly
(25565JE). If replacing just the thermocouple (Figure 7-5), also do the following:
• Retrieve a Neo-Lube No. 1 dry film conductive lubricant from Huron
Industries, Inc. and apply it to the following:
−
Thermocouple nut
−
Both furnace holes
−
Captive screw on furnace bracket
Allow the lubricant to dry. When the lubricant is dry, continue with
the steps below.
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.
Reconnect the thermocouple wires to TB5 on the analog board and
reconnect the furnace wires to TB6 on the analog board.
Reconnect the cell assembly as described in the "Cell Mount Assembly
Replacement" section.
Connect the 24 VDC power plug to the analyzer.
When the analyzer is turned on, it will need to be recalibrated (Chapter 5).
2. Insert the thermocouple with the nut
and #10 lockwasher into the furnace
as far as possible. Hand tighten the
nut. Tighten with a wrench one-quar-
ter turn.
3. Place the new furnace into the furnace
L-bracket; tighten the furnace captive
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 at-
tached to the furnace through the hole
in the furnace insulation cover.