TM 9-4120-360-14
c. Install anew filter-drier, and complete the assembly and charging of the air conditioner in accordance with
Section XVII. EVAPORATOR COIL
5.87. Description
The evaporator coil receives liquid refrigerant from the expansion valve, and evaporates the liquid to a gas by absorbing
heat from the airflow passing over the outside surface of the coil. The evaporator coil is located in the top front section of
the air conditioner.
5.88. Access
Gain access to the evaporator coil as directed in the following procedure:
a. Remove 18 screws and washers from the four sides of the fabric cover, and remove the cover.
b. Remove 15 screws and paeking washers from the top surface of the top panel, and five screws from the rear
flange. Remove the top panel.
c. Detach the evaporator discharge grille by turning six cam-lock fasteners counter-clockwise 1/4 turn.
Remove the grille.
d. Remove the mist eliminator by pulling it straight up out of channels.
e. Tag and disconnect wires to heating elements. Remove hold-down clamps from six heating elements by
unscrewing the panel fastener screw in each. Remove heating elements by pulling straight up.
5.89. Removal
Remove the evaporator coil front the air conditioner in accordance with the following instructions:
a. Refer to figure 5-8 for identification of service valves. All refrigerant must be discharged before opening the
system (paragraph 5.22. a).
b. Dismantle the liquid line expansion valve as directed below, but do not debraze the distributor from the valve
body at this time.
(1) Unscrew the equalizer tube flare nut from the power assembly of the valve. (See figure 5-9).
(2) Remove two mounting screws (10, figure 5-9) from the bracket and valve body. Carefully separate the
power assembly (1) from the valve body (9), and remove gaskets (6 and 8) and cage assembly (7).
(3) Provide a flow of 1-2 cfm (0.1 -0.2 M3/min) of dry nitrogen through the system from the discharge
service valve for at least three minutes, then debraze the liquid line from the expansion valve.
c. Remove evaporator/condenser fan motor to gain access to suction line flange connection (Refer to Chapter5.
sections XX through XXII).
d. Remove tbree capscrews from the rear of the suction line flange connection, and separate the two halves of
the flange connection slightly. Remove and discard the O-ring.
e. Remove four screws and packing washers from th casing and evaporator coil bracket on each side of the air
conditioner. Lift the coil straight up, and remove it from the air conditioner.
