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TM 9-4120-389-14
NOTE
Should unit fail to heat the room or enclosure to the desired temperature or fail to
maintain the desired temperature with temperature control thermostat set in
maximum WARMER position, switch to HI HEAT.
d.
Adjust fresh air damper (door) to desired setting. It is normally better to keep the fresh air damper
slightly open. Damper should be closed during very cold weather and during fast warmup periods.
Figure 2-9. Fresh Air Damper (Door) Adjustment
e.
Adjust louvers to suit. Since warm air tends to rise, it is normally better to adjust the evaporator
outlet louvers slightly downward (contact Unit Maintenance). The evaporator inlet louvers should be full open.
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