ARMY TM 9-4120-380-14
AIR FORCE TO 35E9-136-21
Figure 2-2. Air Inlets and Outlets
If the system or shelter has two units, set one unit PRIME UNIT SELECT switch to PRIMARY Set other unit to
If both units are needed for temperature control, set PRIME UNIT SELECT switch on both units to PRIMARY.
During warm or cold weather (air conditioner operation in AUTO mode):
Limit traffic through doors as much as possible, and
Keep doors and windows tightly closed.
During cold weather
Adjust shades, blinds, etc. (when applicable);
Admit sunlight during day, and
Close them at night.
During hot weather:
Adjust shades, blinds, etc. (when applicable), and
Block out sunlight during day.