Operation In HI HEAT Mode

TM 5-4120-393-14

2-11. Operation In HI HEAT Mode . In the HI HEAT mode, six heaters are activated.

Three are thermostatically

controlled. Three operate all of the time.

a. Turn mode selector switch to HI HEAT.

b. Turn TEMPerature control thermostat knob as far as it will go in the INCREASE (warmer) position.

c. When room or enclosure temperature reaches the desired level, slowly turn the TEMPerature control thermostat

knob toward DECREASE. Make small adjustments until desired temperature is maintained automatically.

NOTE

Should unit continue to produce too much heat with TEMPerature control

thermostat knob adjusted toward the decrease setting, switch to LO 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 the 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.

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