TM 9-4120-407-14
(5) The fresh air damper can be adjusted by turning the FRESH AIR DOOR knob toward OPEN or
CLOSE.
NOTE
The mixture of fresh air and recirculated air can be fully regulated
by adjusting the fresh air damper and the evaporator air return
grille together. With the fresh air damper fully closed and the
evaporator return air grille fully open, 100% recirculated air is being
used. With the fresh air damper fully open and the evaporator
return air grille fully closed, 100% fresh air is being used. Any
position between these two extremes will result in a mixture of
recirculated and fresh air.
EVAPORATOR AIR
DISCHARGE GRILLE
(EACH LOUVER CAN BE ADJUSTED
INDIVIDUALLY BY HAND)
EVAPORATOR AIR
RETURN GRILLE
(ADJUSTED AT HANDLE)
Figure 2-5. Grille Adjustment
b. Faults and Corrective Actions.
(1) If the amperage draw exceeds safe operating limits, the circuit breaker will trip off.
Figure 2-6. Temperature Control Panel Assembly
(a) Turn the MODE selector rotary switch to OFF/RESET position.
2-19
