TM 9-4120-371-14
2-20. 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.
2-21. OPEPATION UNDER
EMERGENCY CONDITIONS
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. 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) chain may be taped over to prevent damper from being opened.
(3) The conditioned air inlet louvers should be adjusted (partially or completely) closed in conjunction
with the CBR fitter 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 208 volt, 3 phase power is in critically short supply, if the
air conditioner cannot be turned off completely, it should be operated in VENTILATE mode only,
NOTE
The following applies only on units equipped with the accessory item blast damper
assembly.
d. Nuclear blast. The blast damper assembly is designed to trip and close following a nuclear blast. This
will prevent contaminated air from being drawn into the conditioned area through the fresh air inlet. The
operator must also IMMEDIATELY close the fresh air inlet damper.