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ARMY TM 9-4210-381-14
NAVY EE-000-CA-MMA-010/7053-AC
AIR FORCE TO 35E9-136-31
a.
Check all openings in the enclosure, especially doors and windows, to be sure they are tightly closed. Limit
in and out traffic, if possible.
b.
Open shades and awnings to permit entry of direct rays of the sun, if appropriate.
c.
Limit the amount of cold, outside air introduced through the fresh air inlet to that needed for ventilation.
2-18.
OPERATION IN DUSTY OR SANDY CONDITIONS. Dusty and sandy conditions can seriously reduce the
efficiency of the air conditioner by clogging the air filters and thereby causing a restriction of the volume of airflow.
Accumulation of dust or sand in the condenser coil and/or in the compressor compartment may cause overheating of the
refrigeration system. Dust or sand may also clog the condensate trap, and water drain lines. Some of the steps that may
be taken are:
a.
Frequent cleaning of filters and all other areas of dust and sand accumulation. In extreme conditions, daily
cleaning of filters may be necessary.
b.
Limit the amount of dusty or sandy outside air introduced through the fresh air inlet to that essential for
ventilation.
2-19.
OPERATION IN UNUSUALLY WET CONDITIONS. The air conditioner is designed for normal exposure to the
elements, so it is reasonably waterproof. Some of the steps that should be taken in an extremely wet climate are:
a.
More frequent inspection and cleaning of the condensate trap and drain lines to insure proper drainage and
prevent accumulation of water inside the cabinet.
b.
Cover the fresh air inlet on the back of the cabinet during periods of wet windy weather when the air
conditioner is not in operation.
2-20.
OPERATION IN SALT AIR OR SEA SPRAY. Salt air or sea spray may cause many of the same clogging
problems encountered when operating in a dusty or sandy environment. In addition, the nature of salt presents serious
corrosion problems. Frequent cleaning is necessary during which all exposed surfaces should be thoroughly spray rinsed
or sponged with fresh water to remove salt.
2-21.
OPERATION UNDER EMERGENCY CONDITIONS.
a.
Chemical, Biological, Radiological Hazard (CBR). Should it be necessary to operate in conditions requiring
use of CBR filtration equipment, see specific instructions for your shelter or facility installation. The following
are general suggestions and do not apply if they conflict with instructions for your shelter or facility
installation.
(1)
The fresh air inlet should be closed, the opening should be covered with a suitable material, and
sealed air tight.
(2)
The return air inlet should be partially or completely closed with a suitable material. This will cause a
more positive pressure on inside of shelter or enclosure and keep air from being drawn in from outside
the enclosure.
b.
Power Conservation. During periods when full 208 V ac, 3-phase power is in critically short supply, if the air
conditioner cannot be turned off completely, it should be operated in AUTO mode only.
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