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TM 9-4120-389-14
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
2-15. GENERAL.
The model 3864 Air Conditioner is designed to operate normally within a wide range of climatic conditions.
However, some extreme conditions require special operating and servicing procedures to prevent undue
loading and excessive wear on the equipment.
2-16. OPERATION IN EXTREME HEAT.
The air conditioner is designed to operate in temperatures up to 120 deg. F (48.9 deg. C). Extra care should
be taken to minimize the cooling load when operating in extremely high temperatures. Some of the steps that
may be taken are:
a.
Check all openings in the shelter or enclosure, especially doors and windows, to be sure they are
tightly closed. Limit in and out traffic, if possible.
b.
When possible, use shades or awnings to shut out direct rays of the sun.
c.
Limit the use of electric lights and other heat producing equipment.
d.
Limit the amount of hot, outside air introduced through the fresh air damper to that needed for
ventilation.
NOTE
Weather stripping, the installation of storm doors and windows (if appropriate), and
insulation of surfaces exposed to the outside is recommended when operating in
extremely high temperatures for extended periods is anticipated.
2-34
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