TM 9-4120-357-14
5-27. Condenser Coil.
The condenser coil consists of
two separate coil circuits: The condensing coil and the sub-
cooling coil. These coils are assembled into a single unit with a common set of aluminum fins and steel end-plates.
(See Figure 5-2.) The condenser is mounted horizontally, and occupies approximately the entire cross-sectional area of
the air conditioner above the lower third of the unit.
a. Access. Remove the front access panel and the rear panel, motor mounting bracket assembly, and deflector
door and condenser intake screen as directed in the following steps:
(1) Unscrew four panel fastener screws, and remove the front access panel.
(2) Disconnect wiring harness plug, P2, from the receptacle on the condenser fan motor.
(3) Remove six screws from the hinge support bracket (8, Figure 4-5) ,
and remove two screws from each lid
support bracket mounting foot (6) . Remove the deflector door assembly (3) .
(4) Remove 12 screws from the frame of the condenser intake screen, and remove the screen.
(5) Remove six screws from the bottom flange of
the motor mounting bracket assembly (12, Figure 4-5) ,
and
place wood blocks under the fan shroud for support during further disassembly.
(6) Remove four screws from top and bottom of pressure cutout switch enclosure attachment to rectangular panel.
(7) Pull the circuit breaker control cable all the way out. Grip the shaft with a brass of copper strip held in a pair of
pliers, and unscrew the operating knob from the shaft. Remove nut, jam nut and lock washer from mounting ferrule of
control cable. Push cable assembly inside the panel.
(8) Remove the alternate power connection receptacles, if
used, by
removing four screws and self-locking nuts.
(9) Remove nine screws from each side-flange of the rear panel. Carefully work the panel off the casing with the
help of an assistant. Store panel outer-face-down on corner support blocks.
b. Discharging the System. Whenever a
leak is
detected or a
refrigeration component must be
replaced, you must
discharge all gas from the refrigeration system in accordance with paragraph 5-6.
c. Removal of Coil.
Remove the condenser coil from the air conditioner in
accordance with the following procedure:
(1) From beneath each end of
the coil (1, Figure 5-2) remove four screws and washers that secure the mounting
flanges of the coil to the support flange of the casing.
(2) With dry nitrogen flowing through the system, debraze and separate the large tubing connection from the
compressor, near the front of the air conditioner, and the three tubing connections near the rear of the air conditioner.
NOTE
If necessary to gain sufficient clearance for removal, debraze tubing and fittings that in-
terfere with coil removal, and remove them.
WARNING
Wear leather-palm gloves when handling the fins of the coil. They are sharp and can in-
flict multiple cuts.
(3) With the help of an assistant, push the connecting end of the coil upwards far enough for the ends of the tub-
ing connections to clear the supporting flange, and pull the coil out from the rear of the air conditioner.
(1) With an assistant holding each end of the coil, push the coil into the air conditioner, keeping the weight off of
the tubing connections, until it is completely in position. Assemble tubing connections.
(2) Secure the mounting flanges with four screws and washers through the support flange of the casing.
(3) Initiate a
1-2 CFM (0.5 - 1
M3) flow of
dry nitrogen through the system, and braze tubing connections.
5-57