Fluke 9116A User Manual page 18

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2. Locate the heat pipe (5) and the heat pipe installation tool. Use cotton
gloves to handle the heat pipe. Finger prints will cause corrosion of the
Inconel at high temperatures. The installation tool has a handle with
heavy gauge wire hooks which fit into the tabs on the top of the furnace.
Remove any packing materials from the heat pipe. (Any finger oils must
be removed with reagent grade alcohol before installation.) The heat
pipe has a protrusion on the top between the installation tabs which
served as a filling port. This port must be rotated appropriately to fit the
matching notch on the top support block. Note the orientation of the
notch on the top support block and be sure to rotate the heat pipe accord-
ingly. The larger notches in the top support block are toward the rear of
the furnace. There is a grounding wire attached to the top flange of the
heat pipe. BE CAREFUL that it does not damage the ceramic heaters as
the heat pipe is lowered into the furnace.
3. Attach the installation tool to the heat pipe and lower it very carefully
into the furnace. Maintain the heat pipe in the center of the well so as to
allow the bottom support block to slide into the cavity at the bottom of
the heat pipe. The fiber-ceramic material is very fragile. The heater and
the support can easily be damaged if care is not taken during heat pipe
installation.
4. Once the heat pipe is in place, position the top support block (3) over the
heat pipe. Be careful to position the notch onto the heat pipe, the flanges
of the heat pipe (5) into the slits in the support block and the grounding
wire through the right rear access notch (when facing the furnace) in the
support block. If necessary, use a knife to cut pieces of the ceramic blan-
ket material provided to center and firmly locate the top support block in
place.