18-AH47D1-2
9
Figure 14 - Sealed Schrader core
Figure 15 - Wrapping liquid line
Figure 13 - Field fabricated liquid line
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) It is necessary to remove the solder cap from
the short liquid line to connect a field fabri-
cated liquid line.
6) 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 13)
7) 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.
8) Make certain the brass fitting on the suction
manifold has a schrader core inside and is
sealed with a cap. (See Figure 14)
9) The field fabricated liquid line must be
wrapped to prevent copper tubing from coming
in contact with aluminum tubing and the outer
sheet metal cover. (See Figure 15)
Note: NON-metallic tape such as electrical
tape, foam tape, armaflex etc. is recommended.
For coil replacement and reconnection instruc-
tions, see
Section 6.
