TM 9-4120-402-14
2-10. OPERATION IN COOL MODE. - continued
d. For faster cool down at initial start-up, 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 2-14. Fresh Air Damper (Door) Adjustment
e. When room or enclosure temperature reaches the desired level, slowly turn the TEMPERATURE control
potentiometer toward WARM. Cooling will stop when you reach the approximate room temperature. Further adjustment
can be make by turning the TEMPERATURE control potentiometer slightly toward COOL or WARM until desired
temperature is controlled automatically.
f. Adjust grilles to suit. Since cold air tends to flow downward, it is normally better to adjust the conditioned air
discharge grille slightly upward. The conditioned air intake grille should be fully open.
Figure 2-15. Grille Adjustment
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