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bleed air from the engines can also be used.
The Bleed Air System control panels located on the overhead panel.
Air Conditioning System
The air conditioning system is controlled during all phases of operation by two Air Conditioning
System Controllers (ACSC). The ACSCs provide indications and warnings to EICAS and
maintenance information to CAIMS.
The air conditioning system comprises the following sub-systems:
• The Flow Control System.
• The Air Conditioning Units (2).
• The Temperature Control System.
• Air Distribution and Exhaust.
• The Emergency Pressurization System.
The Air Conditioning System control panel is located on the overhead panel.
Cabin Pressure Control System (CPCS)
The Cabin Pressure Control System (CPCS) is composed of two controllers, two outflow valves and
two safety valves. The CPCS provides indications and warnings to EICAS and maintenance
information to CAIMS.
The system includes safety devices which affect outflow valve travel limitation, cabin altitude
limitation and differential pressure limits exceedance.
AIR CONDITIONING AND PRESSURIZATION
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
02−10−1
GENERAL (CONT'D)
The cabin is controlled to an altitude of no more than 5,670 feet at 51,000 feet airplane altitude and
no more than 4,500 feet when flying at 45,000 feet.
Effectivity:
• Airplanes 9127 thru 9158 not incorporating Service Bulletin:
• SB 700−1A11−21−004, Modification − Pressurization Control − Cabin Altitude Reduction
During Flight for Improved Passenger Comfort.
The cabin is controlled to an altitude of no more than 7,230 feet at 51,000 feet airplane altitude and
no more than 6,000 feet when flying at 45,000 feet.
The CPCS controls cabin rate at 500 ft/min cabin climb and 300 ft/min cabin descent (normal mode)
and provides a 800 ft/min cabin climb and up to a 800 ft/min descent rate (high mode) in order to
accommodate the maximum normal airplane operating performance.
The Pressurization System control panel is located on the overhead panel.
AIR CONDITIONING AND PRESSURIZATION
Flight Crew Operating Manual Rev 12, Aug 14, 2006
CSP 700−5000−6
Volume 2
02−10−2
GENERAL (CONT'D)
The BLEED/AIR COND/ANTI-ICE and the PRESSURIZATION panels are located on the overhead
panel. Synoptics are available on the SYSTEMS electronic display unit.
GF0210_001a
AIR CONDITIONING
BLEED BLEED
RAM AIR
19°C 21°C 22°C
CKPT FWD AFT
20°C 20°C 23°C
23 °C 23 °C 23 °C
12°C
L PACK
TRIM AIR
15°C
R PACK
LP
HP
L R
APU
HP
LP
COND
AIR
BLEED/ANTI−ICE
40
PSI
40
PSI
Air Conditioning Synoptic
Pressurization Panel
Bleed/Air Conditioning/Anti−Ice Panel Bleed/Anti−Ice Synoptic
For More information, see Chapter 14
ICE AND RAIN PROTECTION.
TEMPERATURE
COCKPIT
COLD HOT
FWD CABIN
COLD HOT
AFT CABIN
COLD HOT
OFF OFF ON
RECIRC TRIM AIR RAM AIR
AUX PRESS
ON
HOT
COLD
L MAN
TEMP
R MAN
TEMP
HOT
COLD
LO HIGH
PACK CONTROL
NORM
MAN
R PACK
OFF
FAIL
L PACK
OFF
FAIL
XBLEED
AUTO
CLSD OPEN
L ENG BLEED
AUTO
OFF ON
R ENG BLEED
AUTO
OFF ON
APU BLEED
AUTO
OFF ON
AUTO
OFF ON
AUTO
OFF ON
AUTO
OFF ON
L COWL WING R COWL
ANTI−ICE
AUTO
FROM L FROM R
WING XBLEED
MAN PRESSURIZATION AUTO
AUTO/
MAN
MAN
MAN ALT
UP
DN
OUTFLOW VALVE
CLOSED
1
CLOSED
2
DITCHING
ON
MAN
FMS
UP
DN
HIGH
NORM
LDG ELEV RATE
DEPRESS
ON
EMER
AIR CONDITIONING AND PRESSURIZATION
Rev 12, Aug 14, 2006 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
02−10−3
BLEED AIR SYSTEM
The pneumatic system supplies compressed air for air conditioning and pressurization, engine
starting and ice and rain protection (see Chapter 14). The pneumatic air supply normally comes from
the engines (inflight), and the APU or a high pressure ground air supply unit (on the ground).
APU
ENGINES
GROUND
SOURCE
BLEED
AIR
SYSTEM
BLEED
MANAGEMENT
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