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┃I  -~ A318                      ┃AIR COND/PRESS/VENT ┃1.21.10     P 5       ┃
┃  .*,,.8, ,, ~L,~ A319          ┃                    ┃                      ┃
┃                                ┃                    ┣━━━━━┳━━━━━┫
┃ Lii,~ A320                     ┃                    ┃SEQ 100 I ┃I REV 33  ┃
┃      A~7-~'M" A321             ┃   AIR CONDITIONING ┃          ┃          ┃
┃   FLIGHT CREW OPERATING MANUAL ┃                    ┃          ┃          ┃
┗━━━━━━━━━━━━━━━━┻━━━━━━━━━━┻━━━━━┻━━━━━┛
PACK FLOW CONTROL VALVE
This valve is pneumatically-operated and electrically-controlled. It regulates the air flow in
accordance with signals received from the pack controller.
In the absence of air pressure, a spring keeps the valve closed.
The valve closes automatically in case of pack overheating, engine starting, or operation of
the fire or ditching pushbutton.
The valve is controlled from the AIR COND panel.
RAM AIR
An emergency ram air inlet ventilates the cockpit and cabin to remove smoke, or if both
packs fail.
The emergency ram air inlet valve is controlled by the RAM AIR pushbutton on the AIR
COND panel.
This pushbutton opens the ram air valve, provided that ditching is not selected.
When the RAM AIR pushbutton is ON : The outflow valve opens about 50 %, provided that
it is under automatic control and AP is less than one psi. The outflow valve does not
automatically open if it is under manual control, even if AP is less than one psi. If AP is
greater than one psi, the check valve located downstream the ram air door will not open,
even if the ram air door has been selected open. No airflow will then be supplied.
MIXER UNIT
This unit mixes cold fresh air from the packs with the cabin air being recirculated through
recirculation fans. The mixer unit is also connected to the emergency ram air inlet and the
low pressure ground inlets.
HOT-AIR PRESSURE-REGULATING VALVES
This valve regulates the pressure of hot air, tapped upstream of the packs.
It is pneumatically-operated and electrically-controlled from the HOT AIR pushbutton on the
AIR COND panel. In the absence of air, a spring keeps the valve closed.
The valve closes automatically, if :
- The duct overheats, or
- The cockpit trim air valve fails, or
- Both cabin trim air valves fail.
The hot-air pressure-regulating valve remains operative, even if either the forward or aft
cabin trim air valve fails.
TRIM AIR VALVES
These valves are electrically-controlled by the zone controller. A trim air valve, associated
with each zone, adjusts the temperature by adding hot air.
CCM ALL
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┃                                ┃                              ┃1.21.10     P 6       ┃
┃                                ┃                              ┣━━━━━┳━━━━━┫
　
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本文鏈接地址：AIRBUS A320 Flight Crew Operating Manual1(91)