TM 9-4120-378-14
Adjust the evaporator outlet louvers individually to direct the airflow as desired.
d.
NOTE
Cool air is denser than warm air, so it has a tendency to flow downward. To offset
this tendency, it is often advisable to adjust the evaporator outlet louvers to direct
the cool air slightly upward.
Cooling With Fresh Air.
2.5.3
When the vent damper door is open to admit fresh air, partially close the evaporator inlet louver to balance the
a.
incoming air.
Keep the vent damper door closed during heavy rain.
b.
STOPPING THE AIR CONDITIONER.
2.6
Position the Mode Selector switch to OFF.
a.
Close the evaporator inlet louver blades by pushing tabs down.
b.
Close the ventilation damper by turning the ventilation damper actuator.
c.
Make sure power is de-energized to power cable before disconnecting.
If a shutdown is to be for an extended period, cover condenser side of unit with fabric cover and disconnect the
d.
power cable.
STARTING AND OPERATING INSTRUCTIONS FOR HEATING.
2.7
2.7.1
Perform the preventive maintenance checks and services (Table 2-1.).
a.
b.
Check for the correct voltage (115 volts, 50/60 Hz).
c.
Roll up and tie fabric cover.
Open the evaporator inlet louver by moving the tabs up or down as required.
d.
e.
Open the evaporator outlet louvers
f.
Turn the ventilation damper actuator to close the damper door.
Turn the Temperature Selector switch to COOLER (lowest heating position - counterclockwise).
g.
Position the Control Circuit Breaker to ON.
h.
Position the Mode Selector switch to LOW HEAT. Position it to HIGH HEAT if more heat is wanted. (Wait 3
i.
to 5 minutes for heat).
2.7.2 Heating Operation.
After starting the air conditioner in the heating mode, adjust it as follows:
Position the Mode Selector switch to HIGH HEAT or LOW HEAT as desired.
a.
