AIR CONDITIONING/PRESSURIZATION
Sep 13/2004
Flight Crew Operating Manual
Volume 2
REV 1
CSP 100-6
02-02-01
BLEED AIR SYSTEM
DESCRIPTION
High pressure (HP) bleed air is routed through high pressure valves in the ducting to the wing anti-ice system. Intermediate
pressure (IP) air is routed through intermediate pressure valves to the environmental control system (ECS).
The IP ports of the engine supply a common manifold (isolated left and right by the cross bleed valve) that can also be
supplied by the APU or an external ground cart. Regulating valves and check valves are installed in the aft equipment bay
ducting to control bleed air from the left and right engines and APU. The IP bleed air system also includes air control
switches and a leak detection system. Pressure sensors in the bleed air lines send information to the integrated air system
controller (IASC) which processes the information for display on the EICAS.
CF
O
0201002_001
GROUND
SOURCES
EICAS
ANTI-ICING
SYSTEM
ENGINE
STARTING
AIR
CONDITIONING
SYSTEM
INTEGRATED
AIR SYSTEM
CONTROLLER
DISTRIBUTION
INDICATING
SUPPLY
BLEED
AIR
SYSTEM
(IP)
BLEED
AIR
SYSTEM
(HP)
ENGINES
APU
REV 1
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