TM 9-4120-357-14
WARNING
Compressed air used for cleaning purposes will not exceed 30 psi (2.1 kg/cm2). Do
not direct compressed air against the skin. Use goggles or full face shield.
b. Cleaning. Agitate the mist eliminator in detergent solution, using a soft brush if necessary to dislodge stubborn
accumulations of dirt. Blow dry with compressed air at 25-30 psi (1.76-2.11 KG/CM2).
c. Inspection. Inspect for broken or displaced wires, bent or deformed frame, or broken spot-welds, replace if dam-
aged.
d. Installation. Slide the mist eliminator into position between guides, keeping the top mark up and facing forward.
Position the top panel on the unit, and secure with 22 screws and washers through the top panel, and nine screws and
washers through the rear flange. Install the evaporator air discharge grille with 16 screws and washers through the
frame.
4-28. Block-Off Assembly.
The block-off assembly (figure 4-8) is used only when the control panel is removed to a remote location. The block-off
assembly fills the opening in the lower front access panel to prevent intake of air through the opening, which would by-
a. Removal of Control Panel. Remove the control panel from the unit in accordance with the following procedure.
(1) Unscrew four panel fastener screws from the front access panel, and remove the panel by pulling outward
and upward.
WARNING
Disconnect power from the air conditioner before performing maintenance work
on the electrical system. The voltages used can be lethal.
(2) Remove the electrical plug (P8) from the end of the control panel assembly.
(3) Remove evaporator air intake (return air) grilles by
removing 12
screws and washers from each grille.
(4) Reach through the evaporator air intake opening, and remove the nut and screw holding the loop clamp
which supports the thermostat bulb on the bottom of the filter support channel. Carefully remove the loop clamp from the
thermostat bulb.
CAUTION
When removing the control panel assembly from the unit, be careful to avoid
kinking the capillary tube connecting the thermostat bulb to the assembly.
(5) Carefully remove the control panel assembly from the unit while leading the capillary tube and thermostat
bulb around obstructions and through the grommet.
(6) Coil the capillary tube evenly to avoid kinking, and fit it with the bulb into the cavity on rear surface of box.
Secure the bulb with a loop clamp, screw and nut.
b. Installation of Block-off Assembly. Install the block-off assembly (figure 4-8) as
follows:
(1) Remove the cover and install the control panel assembly in opening.
(2) Place the block-off assembly in position on the junction box, and secure with four screws.
(3) Install the front access panel on the air conditioner by placing the lower edge of the panel behind the step of
the base plate, and pushing downward and inward. Secure with four panel fastener screws.
(4) Position the evaporator air intake grille on
the unit, and secure each with 12
screws and washers.
4-31