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TM5-4120-376-14
2-8. OPERATIONAL INSTRUCTION WARNING PLATE.
SECTION IV. OPERATION UNDER UNUSUAL CONDITIONS
2-9. OPERATION IN EXTREME COLD.
CAUTION
Do not disturb wiring unless absolutely necessary. Cold temperature makes wires
and insulation very brittle and easily broken.
a. Keep entire unit free of snow and ice.
b. Cover unit when not in use.
2-10. OPERATION IN EXTREME HEAT.
NOTE
Unit Preventive Maintenancc Checks and Services (PMCS) should be performed
at daily intervals.
a. General. The air conditioner is designed to operate in temperatures up to 120°F (49°C). Extra care should
be taken to minimize the cooling load when operating in extreme high temperatures.
b. Protection.
(1) Check all openings in the enclosure, especially doors and windows, to be sure they are tightly closed.
Limit in and out traffic if possible.
(2) When appropriate, usc shades or awnings to shut out direct rays of the sun.
(3) When possible, limit the usc of electric lights and other heat producing equipment.
(4) Limit the amount of hot, outside air introduced through the fresh air damper to that essential for
ventilation.
NOTE
Weatherstripping, 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.
c. Cleaning.
(1) Clean outside grilles, coils, filters, and mist eliminator more frequently.
Change 4 2-11
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