TM 9-4120-388-14
2-9. OPERATION IN LO HEAT MODE- Continued.
When room or enclosure temperature reaches the desired level, slowly turn the TEMPerature control thermo-
c.
stat 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 main-
tain the desired temperature with TEMPerature control thermostat set in maximum lN-
CREASE position, switch to HI HEAT.
Adjust fresh air damper (door) to desired setting. It is normally better to keep the fresh air damper slightly open.
d.
Damper should be dosed 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 fully open:
NOTE
An overheat thermostat located near the heating elements will turn them off if the temper-
ature in the heater compartment reaches an excessive level.
