TM 9-4120-403-14
Keep doors and windows tightly closed.
Limit use of fresh (outside) air.
NOTE
It is normally better to keep the fresh air damper slightly open. This will create a slight overpressure,
provide replacement oxygen, and reduce room odors. Damper should be closed during extreme weather
conditions and during periods when fast warmup or cooling is necessary.
Do not adjust controls unnecessarily. Properly set the controls (See para. 2-8 thru 2-11) and the unit will
automatically control the temperature. The TEMPerature control thermostat on the control panel operates like a
conventional room thermostat except that the temperature scale is not marked on the control panel. The thermostat has
a control range of 40 to 90 (5to 32 ). The centered position of the control knob would be approximately 65
F
F
C
F
(18 ). The full INCREASE would be 90 (32 ). The full DECREASE would be 40 (5 ).
C
F
C
F
C
(2) During cold weather
Adjust shades, blinds, etc. (when applicable) to admit sunlight during day. Close them at night.
Adjust the conditioned air outlet dampers slightly downward.
(3) During hot weather
Adjust shades, blinds, etc. (when applicable) to block out sunlight during day.
Adjust the conditioned air outlet dampers slightly upward.
2-13
