Operation In Unusually Wet Conditions

TM 5-4120-393-14

b. Limit the amount of dusty or sandy outside air introduced through the fresh air damper to that essential for

ventilation.

c. Roll down and secure the fabric cover on the back of the cabinet during periods of shut-down.

2-20. 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 mist eliminator, condensate trap, and drain lines to insure proper

drainage and prevent accumulation of water inside the cabinet.

b. Roll down and secure the fabric cover on the back of the cabinet during periods of wet, windy weather when the

air conditioner is not in operation.

c. Roll up and secure the fabric cover during dry spells when the air conditioner is not in operation so that the interior

can dry out and condensation will not accumulate.

2-21. Operation In Salt Air Or Sea Spray. Salt air or sea spray may cause many of the same clogging problems as

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. The fabric cover on the back of the cabinet should be rolled down and secured

during all periods when the air conditioner is not in operation.

2-22. Operation Under Emergency Conditions.

a. CBR (Chemical, Biological, Radiological) hazard. This unit has provisions for connection to an external CBR

filtering source. Should it be necessary to operate in conditions requiring use of CBR filtration equipment, see specific

instructions for your shelter or facility installation.

b. General Suggestions. The following are general suggestions and do not apply if they conflict with instructions

for your shelter or facility installation.

(1) The fresh air damper (door) should be closed, the opening should be covered with a suitable material, and

sealed air tight.

(2) Fresh air damper (door) knobs may be removed to prevent damper from being opened.

(3) The conditioned air inlet louvers should be adjusted (partially or completely) closed in conjunction with the

CBR filter intake volume. This will cause a more positive pressure on inside of shelter or enclosure and keep air from

being drawn in other than through the CBR filter.

c. Power conservation. During periods when full electrical power is in critically short supply, if the air conditioner

cannot be turned off completely, it should be operated in VENTILATE mode only.

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