Overview
Conditioned air for the cabin comes from either the airplane air conditioning
system or a preconditioned ground source. Air from the preconditioned ground
source enters the air conditioning system through the mix manifold.
The air conditioning system provides temperature controlled air by processing
bleed air from the engines, APU, or a ground air source in air conditioning packs.
Conditioned air from the left pack, upstream of the mix manifold, flows directly
to the flight deck. Excess air from the left pack, air from the right pack, and air
from the recirculation system is combined in the mix manifold. The mixed air is
then distributed through the left and right sidewall risers to the passenger cabin.
Air Conditioning Distribution
Conditioned air is collected in the mix manifold. The temperature of the air is
directly related to the setting of the Temperature Selectors.
Overheat detection is provided by temperature sensors located downstream of
the packs and the mix manifold. An overheat condition causes the appropriate
trim air modulating valve to close and the ZONE TEMP light to illuminate.
Conditioned air for the cabin comes from either the airplane air conditioning
system or a preconditioned ground source. Air from the preconditioned ground
source enters the air conditioning system through the mix manifold.
The air conditioning system provides temperature controlled air by processing
bleed air from the engines, APU, or a ground air source in air conditioning packs.
Conditioned air from the left pack, upstream of the mix manifold, flows directly
to the flight deck. Excess air from the left pack, air from the right pack, and air
from the recirculation system is combined in the mix manifold. The mixed air is
then distributed through the left and right sidewall risers to the passenger cabin.
Air Conditioning Distribution
Conditioned air is collected in the mix manifold. The temperature of the air is
directly related to the setting of the Temperature Selectors.
Overheat detection is provided by temperature sensors located downstream of
the packs and the mix manifold. An overheat condition causes the appropriate
trim air modulating valve to close and the ZONE TEMP light to illuminate.
