TM 9-4120-371-14
NOTE
For faster warmup start unit in HI HEAT mode. In moderate temperatures, unit can
then be switched back to LO HEAT.
c. When room or enclosure temperature reaches the desired level, slowly turn the Temperature control
thermostat knob toward DECREASE. Heating will stop when you reach the approximate room temperature.
Further adjustment can be made by turning the Temperature control thermostat knob slightly toward
INCREASE (warmer) or DECREASE (cooler) until desired temperature is controlled automatically.
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
INCREASE 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.
e. Adjust louvers to suit. Since warm air tends to rise, it is normally better to adjust the conditioned air outlet
louvers slightly downward. The conditioned air inlet louvers should be full open.
NOTE