Operation In COOL Mode.

TM 5-4120-393-14

f. During periods of very cold weather the fabric cover should be rolled down and snapped.

An overheat thermostat located near the heating elements will turn them off if the

temperature in the heater compartment reaches an excessive level.

2-12. Operation In COOL Mode.

a. Fabric cover must be rolled up and secured with turnbutton fasteners

b. Turn mode selector switch to COOL.

c. Turn TEMPerature control thermostat knob as far as It will go in the DECREASE (cooler) position.

d. For faster cool down at initial start-up fresh air damper (door) should be closed. After desired cooling temperature

is reached, it is normally better to keep the fresh air damper (door) slightly open. During periods of very hot outside

temperatures, it should be closed to improve efficiency and conserve energy.

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

knob toward INCREASE. Cooling will stop when you reach the approximate room temperature. Further adjustments can

be made by turning the TEMPerature control thermostat knob slightly toward DECREASE(cooler) or INCREASE (warmer)

until desired temperature is controlled automatically.

2-14