TM 9-4120-357-14
(21) Debraze the header extension tube (4, Figure 4-7) from the evaporator coil (1) while an
assistant pulls up on
the coil to separate the joint. Remove the coil and attached tubing.
(22) Debraze tubing from sight-glass liquid indicator (4, Figure 5-2).
Remove two screws, lock washers and nuts from bracket. Remove the sight-glass liquid indicator assembly.
(23) Remove six screws and washers from each of the accumulator tank mounting brackets. Debraze tubing
joints, and remove accumulator tank mounting brackets. Debraze tubing joints, and remove accumulator tanks
(24) Debraze joints, and remove pressure regulator valve (12, Figure 4-7).
(25) Debraze joints, and remove evaporator solenoid valve. (13, Figure 4-7).
(26) Remove four screws from below each mounting flange of
the condenser coil (1, Figure 5-2). Debraze tub-
ing joints as required, and slide coil out through opening in back of casing with the help of an assistant.
(27) Debraze tubing joints as necessary, and remove check valve (13) and pressure relief valve (15).
(28) Remove a screw, two washers and nut from each of two band clamps (10) holding the receiver (11). Re-
move the receiver and attached tubing.
(29) Remove all loop clamps, band clamps, spacers and other hardware securing tubing or refrigeration compo-
nents to walls of casing.
(30) Remove six screws (6, Figure 6-1) and washers (7) from each side flange holding casing to
base plate as-
sembly (4).
(31) Attach a hoist, sling and spreader bar to the lift eyes on each side of casing, and place a slight amount of
tension on the hoist.
(32) Debraze tubing connections above the level of
the compressor to
detach casing from base plate and base-
plate-mounted equipment.
e. Assembly. Assemble the air conditioner into the new casing as indicated in the following procedure:
(1) Using a hoist, sling and spreader, set the new casing down over the baseplate and base-plate-mounted
equipment. Secure casing to base plate with six screws and washers through the mating flanges on each side.
(2) With the old and new casings side-by-side, remove drip pan and drain tube assembly, damper control as-
sembly, baffle, and other parts not removed from old casing at disassembly, and transfer them to new casing.
(3) Position condenser coil in
new casing and secure with four screws into each flange from below. (See Figure
CAUTION
Maintain a 1-2 CFM (0.5 - 1M3) flow of dry nitrogen through the refrigeration sys-
tem to prevent oxidation and scaling when brazing or debrazing components
(4) Assemble tubing connections of receiver (11), check valve (13) and pressure relief valve assembly (15),
(5) Install two accumulator tanks (10 &
11, Figure 4-7). Connect tubing joints, secure with six screws and wash-
ers and braze joints.
(6) Install sight-glass liquid indicator (4, Figure 5-2), gaskets and bracket (5). Secure with two screws, washers
and self-locking nuts. Assemble tubing connections, and braze.
(7) With the help of an
assistant, install evaporator coil (2, Figure 4-7). Assemble suction tube connection (4)
and braze joint. Secure coil with six screws through each end flange.
(8) Form distributor lines (3, Figure 4-7) close to
inside surface of
evaporator coil (2), and connect expansion
valve body (14) to liquid line from sight-glass liquid indicator. Braze joint.
(9) Using new gaskets (6 & 8,
Figure 5-4). Install the expansion valve body (9), taking care to
align projections
on the cage with recesses in the body. Secure with two capscrews (10).
(10) Connect equalizer line to expansion valve, and tighten flare nut.
6-5