Operation In LO HEAT Mode - TM-5-4120-393-140037

TM 5-4120-393-14

b. Adjust fresh air damper to desired setting. The unit can be operated in the VENTILATE mode with the fresh air

damper (door) closed, open, or partially open.

When using fresh air for ventilation a window, door, or vent should be opened If

the room or enclosure is tightly closed, an overpressure will build up and decrease

the volume of fresh air drawn in.

c. Adjus t louvers to suit.

NOTE

To pull in maximum of fresh (outside) air, close conditioned air inlet louvers.

2-10. Operation In LO HEAT Mode . In the LO HEAT mode, three thermostatically controlled heaters are activated.

a. Turn mode selector switch to LO HEAT.

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

NOTE

For faster warm up, start unit in HI HEAT mode. In moderate temperatures, unit

can then be switched back to LO HEAT.

2-11