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likely pilot input that may be required is to
adjust zone temperature. Let us assume that
you wish to cool down the cockpit.
No. Click on the cockpit zone selector.
AIR CONDITIONING MENU Normal Operation 63/69
During the flight phase the air Conditioning
system will work automatically and the only
likely pilot input that may be required is to
adjust zone temperature. Let us assume that
you wish to cool down the cockpit.
No. Click on the cockpit zone selector.
AIR CONDITIONING Normal Operation 64/69
You have now demanded a cockpit
zone temperature of 18 degrees.
Because a low temperature has been
demanded, the trim air valve will close
and the cool pack output will feed the
cockpit zone.
MENU
AIR CONDITIONING Normal Operation 65/69
Note that each increment on the zone temperature
selector scale is 2 degrees which gives a selectable
range from 18 degrees at COLD to 30 degrees at HOT.
180
200
220 260
280
300
240
MENU
AIR CONDITIONING Normal Operation 66/69
In situations of low passenger numbers the Pack flow
selector can be set to LOW. This has the effect of
reducing the bleed demand from the engines and will
therefore save fuel.
MENU
AIR CONDITIONING Normal Operation 67/69
Occasionally with a full passenger load and high
ambient temperatures it may be necessary to select
High pack flow and COLD to reduce the cabin
temperature. Using high pack flow will increase the
bleed demand from the engines and use more fuel.
Once airborne the Flow selector should be returned to
Normal and the temperature selectors adjusted as
required.
MENU
AIR CONDITIONING Normal Operation 68/69
After landing and engine shutdown the system can be
set to run from the APU , switched off completely, or
MENU
AIR CONDITIONING Normal Operation 69/69
an external conditioning unit can be connected via a low pressure
connection point on the underside of the aircraft. The low pressure
air is fed to the mixing unit and then into the three zones. There are
no indications in the cockpit to show that an external conditioning
unit is in use.
External
Conditioning Unit
External
Conditioning Unit
Mixing Unit
NEXT
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MENU
AIR CONDITIONING MENU Normal Operation 70/69
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WWAALLKKAARROOUUNNDDCCHHEECCKK
IINNIITTIIAALLCCOOCCKKPPIITTCCHHEECCKK
AAPPUUBBLLEEEEDDSSUUPPPPLLYYTTOOPPAACCKKSS
TTEEMMPPEERRAATTUURREECCOONNTTRROOLL
TTEEMMPPEERRAATTUURREESSEELLEECCTTOORR
EXIT
AUDIO GLOSSARY FCOM
RETURN
PRESSURIZATION MENU Normal operation 1/18
PRESSURIZATION MENU
Normal operation 2/18
We will now look at the normal operation of the
pressurization system.
As part of your Pre-flight walk around you should visually
check the outflow valve for damage and obstruction.
PRESSURIZATION MENU
Normal operation 3/18
As part of your pre flight cockpit scan, verify on the Cabin
Pressure Panel that the Mode selector switch is in the
AUTO position, lights out.
PRESSURIZATION MENU
Normal operation 4/18
Confirm that the Landing Elevation Selector is set to
AUTOMATIC. Landing elevation is then provided by the
FMGS based upon elevation of the destination airport.
PRESSURIZATION MENU
Normal operation 5/18
Also confirm that the DITCHING sw is in the OFF position,
lights out.
PRESSURIZATION MENU
Normal operation 6/18
On the ECAM CAB PRESS Page confirm that the Landing
Elevation Indication is AUTO.
Once the destination airport has been entered into the
FMGS the destination landing elevation is displayed.
PRESSURIZATION MENU
Normal operation 7/18
Notice that there are no amber indications.
PRESSURIZATION MENU
Normal operation 8/18
So that you can get a better understanding of how the
pressurization system works we will go through a normal
flight profile paying particular attention to the ECAM
indications.
PRESSURIZATION MENU
Normal operation 9/18
When the aircraft is on the ground before the flight, the
outflow valve is fully open and there is no pressure
differential.
This can be seen on ECAM CAB PRESS page.
PRESSURIZATION MENU Normal operation 10/18
PRESSURIZATION MENU
Normal operation 11/18
Observe that:
• the outflow valve is fully open,
• the differential pressure is zero,
• there is no vertical speed,
• the cabin altitude is indicating the field elevation of the
departure airfield.
　
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