TM 9-4120-403-14
e. For faster cooldown at initial startup fresh air damper (door) should be closed. After desired cooling temperature
is reached, it is normally better to keep the fresh air damper (door) slightly open. During periods of very hot outside
temperatures, it should be closed to improve efficiency and conserve energy.
Figure 2-17. Fresh Air Damper (Door) Adjustment
f. When room or enclosure temperature reaches the desired level, slowly turn the TEMPerature control thermostat
knob toward INCREASE and set fan speed switch to LO SPEED. Cooling will stop when you reach the approximate
room temperature. Further adjustment can be made by turning the temperature control thermostat knob slightly toward
DECREASE (cooler) or increase (warmer) until desired temperature is controlled automatically.
g. Adjust louvers to suit. Since cold air tends to flow downward, it is normally better to adjust the conditioned air
outlet louvers slightly upward. The conditioned air inlet louvers should be full open.
Figure 2-18. Louver Adjustment
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