TM 9-4120-357-14
Table 2-1. OPERATING SETTINGS
Mode
Selector
Thermo-
Outdoor Air
Return Air
Air Conditioner
Switch
stat
Damper
Damper
and
Deflector Door
Cooling -
COOL
Desired
Closed
Open
Open
100% Recir-
Temper-
culated Air
ature
Cooling -
COOL
Desired
Partially or
Partially or
Open
with fresh
Temper-
Fully Open
Fully Closed
makeup air
ature
Cooling -
COOL
Desired
Closed
Partially or
Open
with fresh
Temper-
Fully Open
makeup air
ature
through CBR
filter
Heating -
LO HEAT
Desired
Closed
Open
Optional
100% Recir-
or
Temper-
culated air
HI HEAT
ature
Heating -
LO HEAT
Desired
Partially or
Partially or Optional
with fresh
or
Temper-
Fully Open
Fully Closed
makeup air
HI HEAT
ature
Heating -
LO HEAT
Desired
Closed
Partially or
Optional
with fresh
or
Temper-
Fully Open
makeup air
HI HEAT
ature
through CBR
filter
Ventilation -
VENTILATE
Any
Open
Closed
Optional
Maximum
Setting
Outdoor Air
2-6. Starting.
CAUTION
If the air conditioner has been stopped after running in the cooling
mode, let pressure equalize for at least one minute before restart-
ing.
a. Cooling. Before starting the air conditioner in the cooling mode, make sure that the following covers and
grilles are open:
(1) Air conditioner
(2) Deflector door
(3) Evaporator air intake grille
(4) Evaporator air discharge grille
Turn the mode selector switch to COOL, and the temperature control thermostat to DECREASE. Check air delivery to
verify that it is cool, then adjust temperature control thermostat and outside air damper as desired.
b. Heating. Make sure that evaporator air intake and discharge grilles are open, then turn selector switch to LO HEAT
or HI HEAT, as required. Adjust outside air damper to add fresh air if desired.
c. Ventilating. Make sure that evaporator air discharge and intake grilles are open, then turn selector switch to VEN-
TILATE. Open fresh air damper, and close evaporator air intake grilles to obtain maximum outside air if desired.
2-4
