Plumbing; Heat Pipe Installation - Fluke 9116A User Manual

rated for the specified current and voltage. (See Figure 5, Back Panel on page
19.)
Be sure that the furnace chassis is always solidly grounded. A shock hazard
may exist if it is not. All switches are double pole for safety in such
hot-hot-neutral installations and both lines are fused.
3.4

Plumbing

The cooling coils are accessible from the back panel of the 9116A chassis (See
Figure 5, Back Panel on page 19). The cooling tubes are 6.35 mm (0.25 in)
copper. Water cooling prevents much of the furnace heat from loading down air
conditioning systems. Provide cold tap water with a valve convenient for opera-
tion near the rear of the furnace. A flow rate of about 0.4 GPM of tap water is
required. Pressure should not exceed 60 PSIG. Drain the warm exit water into
an appropriate sump.
3.5

Heat Pipe Installation

NOTE: The first heat of the furnace should be done without the heat
pipe to verify operation and to become familiar with the furnace. Re-
move any packing material before operating.
The heat pipe is shipped separately in order to prevent damage to the heater and
delicate fiber ceramic insulation. Re-installation of the control HTPRT and
cutout thermocouple is also required. Follow the instructions carefully. Many of
the materials are fragile. Refer to Figure 1 on page 10. Should the furnace be
relocated, the heat pipe must be removed and reinstalled at the new location.
See Figure 1 which shows the internal components of the furnace core.
1. Remove the top cover (1) of the furnace. Remove the metal retaining
plate (2) by detaching the four screws holding it in. Remove the top sup-
port block (3) and any packing material (used for shipping) from the cen-
tral furnace core. Leave the bottom support block (4) in place at the
bottom of the core.
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