c. Cleaning. Clean the mist eliminator by agitating in detergent solution. Rinse in clear water, and blow dry with
compressed air, or tap each side on the bench or floor while holding the mist eliminator horizontal, to dislodge droplets.
d. Inspection. Inspect the mist eliminator for obvious damage, such as cuts, large perforations (serious
deformation. Accept perforations up to 3/8 inch diameter. Straighten bent or deformed sections impossible. Replace the
mist eliminator if damage exceeds repairable limits.
e. Installation. Install the mist eliminator in the air conditioner as directed in the following steps.
(1) Orient the mist eliminator with the TOP mark up, and the airflow arrows pointing outward, away from
the evaporator coil. Slide the mist eliminator downward between the side channels.
(2) Position the top panel on the air conditioner, and secure with 15 screws and packing washers through the
top surface and five screws through the rear flange.
(3) Fit the fabric cover around four sides of the air conditioner casing so that the eyelets and screw holes
match. Secure with 18 screws and washers.
4.19. Block-Off Panel
a. Description. The block-off panel is a right-angled sheet-metal fabrication designed to block the control
panel opening in the lower panel when the control panel is mounted in a remote location. (See figure 4-3). The control
panel opening must be blocked to prevent air from being drawn into the condenser area of the air conditioner. thus
bypassing the condenser coil and reducing the efficiency of the unit. The block-off panel contains two covered openings
for optional use as connector openings for power supply and control wiring harness receptacles.
b. Installation. After the control panel assembly has been removed from the air conditioner, install the
block-off panel in accordance with the following directions.
It is presumed that an extension control cable with mating connectors has been fabricated locally to extend
from the air conditioner to the remote location of the control panel.
(1) Mount the block-off panel in position with the vertical face forward, on top of the junction box. Use four
screws removed from the control panel assembly to secure the block-off panel.
(2) Remove four screws from the corners of the control wiring harness receptacle opening, and remove the
cover. Install the wiring harness receptacle in the opening. If the power supply cable is to be connected at the block-off
panel, transfer the power input receptacle to the remaining opening in the block-off panel, and transfer the cover plate to
the original location of the receptacle.
(3) Install the lower panel, and secure with two panel fasteners screws. Connect wiring harness plugs.
a. Removal. Drill out the rivets securing the instruction plate to the casing or panel. If the plate is infront of a
functional part of the air conditioner (e.g. the pressure cutout switches) be careful to avoid drilling into the functional part.
b. Installation. Position the instruction plate on the casing or panel, and secure with blind rivets.
4.21. Casing Assembly
a. General. The casing assembly supports or surrounds all functional components of the air conditioner.
Therefore, if damage is extensive enough to require replacement of the casing assembly, it is also extensive enough to
have caused significant damage to major components. In such a case it is necessary to procure a new casing assembly, and
to dismantle the damaged unit completely, test all components, and install serviceable components in the new casing.
Unserviceable components must be replaced.