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Manual 2100-346
Page 8
16. Lubricate male half diaphragm and synthetic rubber
seal with refrigerant oil. Thread coupling halves
together by hand to insure proper mating of threads. Be
sure to hold the coupling firmly to prevent movement of
the coupling and tubing. Failure to do so could tear out
the diaphragm causing a blockage of the system. Use
proper size wrenches (on coupling body hex and on
union nut) and tighten until coupling bodies ”bottom”
or a definite resistance is felt.
18. Leak test all connections using an electronic leak
detector or a halide torch.
19. When tubing is installed in attics or drop ceilings,
insulate the couplings on the larger tube thoroughly
with 3/8” wall thickness, closed cell sponge tube
insulation or equivalent. Failure to insulate will result
in water damage to ceiling since the fitting will “sweat”
and drop water on the ceiling.
17. Using a marker or ink pen, mark a line lengthwise from
the coupling union nut to the bulkhead. Then tighten
an additional 1/4 turn. The misalignment of the line
will show the amount the coupling has been tightened.
This final 1/4 turn is necessary to insure the formation
of leakproof joint. If a torque wrench is used, the
torque values shown in Table 5 are recommended.
CAUTION
After starting to tighten up the fitting, never try to
back it off or take it apart.
TABLE 5
COUPLINGS
eziSgnilpuoCsdnuoPteeF
6-21-01
01-54-53
11-54-53
21-56-05