18-AH47D1-2
7
Figure 11 - Field fabricated liquid line
Figure 10 - Using wet rags
Note: Wet rags must be applied to all braze
joints before and during heating to prevent
overheating of internal coil components. (See
Figure 10)
5) Field fabricate a new liquid line using field-
supplied 3/8” OD copper tubing and fittings.
Route this line toward the suction manifold
side of the coil and through the coupling panel
to the existing field lineset. (See Figure 11)
6) Test fit the field fabricated liquid line to ensure:
A) it does not contact the front panel or return
bends/aluminum tubing.
B) it passes through the opening on the cou-
pling panel.
C) it is long enough to reach the field line set
outside the air handler.
7) Remove the Schrader core from the brass fit-
ting on the suction manifold. (See Figure 8)
8) Connect the equalizer line to the brass fitting
on the suction manifold. (See Figure 9)
9) Sensing bulb should be routed to the suction
manifold with the equalizer line but not yet at-
tached.
10) The field fabricated liquid line, the equalizer
line, and the sensing bulb cap tube must all be
wrapped to prevent copper tubing from coming
in contact with aluminum tubing and the outer
sheet metal cover. (See Figure 7)
Note: NON-metallic tape such as electrical
tape, foam tape, armaflex etc. is recommended.
For coil replacement and reconnections in-
structions, see Section 6.
