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TM 5-4120-287-15
2-13. Operation in Dusty or Sandy Areas
CAUTION
When operating the air conditioner in sandy or dusty areas, install a screen or porous cloth over the
condenser air inlet metal grill (fig. 1-1) and the inlet opening of the fresh air door (fig. 1-1). Clean the
evaporator and condenser assemblies and filters frequently (para 3-10 and 3-11). Provide a frequeriU3,
(pal!L X40 and 3-Ul Provide a structure to protect the air conditioner from abrasion damage; arrange for
adequate ventilation; paint all surfaces that have chipped or peeled.
2-14. Operation Under Rainy or Humid Conditions
CAUTION
When operating the air conditioner under rainy or humid conditions or in direct sunshine, provide a
structure to protect the air conditioner from rain and moisture or direct sunshine. Provide adequate
ventilation oectiaentsa keep electrical components dry and clean; paint all surfaces that have chipped or
peeled.
Section V. OPERATION OF AUXILIARY MATERIAL
USED IN CONJUNCTION WITH THE AIR CONDITIONER
2-15. Fire Extinguisher (Monobromotrifluoromethane Type)
a. Description.
The monobrlomrifluoromethane type fire extinguisher is generally suitable for all types of fire, except fires
involved with LOX (liquid oxygen) generating equipment. The fire extinguisher is furnished with a disposable type
cylinder.
b. Operation. To operate the fire extinguisher perform the following:
(1) Remove fire extinguisher from its location.
(2) Break seal by pulling safety pin from handle.
(3) Point horn at base of flame.
(4) Press trigger for discharge and direct stream at base of flame.
(5) Replace cylinder immediately after using.
c. Replacement of Cylinder. To replace cylinder, perform the following:
(1) Press lever to release pressure from used cylinder.
(2) Loosen swivel valve coupling nut and remove valve assembly from cylinder.
(3) Remove instruction band from used cylinder.
(4) Place new cylinder through instruction band.
(5) Replace safety pin in valve and seal pin with sealing wire.
(6) Attach valve assembly and tighten swivel coupling nut on the new cylinder and place fire extinguisher in mounting
bracket.
(7) Adjust instruction band on cylinder to show maintenance and operating instructions.
d. Maintenance. Weigh fire extinguisher every 3 months and replace cylinder if gross weight has decreased 4 ounces or
more. Lubricate cylinder neck threads with one drop of OE 30 oil before reassembly.
2-9
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