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LEFT
ENGINE
RAM AIR
IP BLEED
PORT
IP BLEED
PORT
GROUND AIR
CONNECTION
PRECOOLER
ATS ATS
1- Flow Control Valves
2- Pack Valve
3- Precooler Crossover Valve
4- Trim Air Valve
V 2
AIR CONDITIONING/PRESSURIZATION
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6 02-03-07
AIR CONDITIONING SYSTEM (Cont)
AIR DISTRIBUTION AND FLOW PATHS
CABIN DISTRIBUTION SYSTEM
CFO0203002_003
COCKPIT
ENTRY WAY
COCKPIT DISTRIBUTION DUCT
UPPER DISTRIBUTION DUCT
LOWER DISTRIBUTION DUCT
CABIN LAVATORY CARGO
SIDE VIEW
(GASPER NOT SHOWN)
EQPT BAY
FROM PACK
CFO0203002_007
COCKPIT
ENTRY WAY CABIN LAVATORY CARGO
SIDE VIEW
EQPT BAY
FROM PACK
GASPERS
REV 1
AIR CONDITIONING/PRESSURIZATION
Volume 2 Flight Crew Operating Manual May 06/2005
02-03-08 CSP 100-6 REV 2
AIR CONDITIONING SYSTEM (Cont)
AIR DISTRIBUTION AND FLOW PATHS (Cont)
CFO0202002_009
EXHAUST PATH
COCKPIT AND CABIN GASPERS SUPPLY
COCKPIT CONDITIONED AIR SUPPLY
CABIN CONDITIONED AIR SUPPLY
COCKPIT
SUPPLY
DUCT
CABIN SUPPLY
DUCTS
CABIN
SUPPLY
CABIN
SUPPLY
DUCTS
EXHAUST
PATH
CABIN
SUPPLY
SUPPLY
SUPPLY
DUCTS
SIDE
PANEL
OUTLET
OVERHEAD
GASPERS
CABIN FLOOR
GASPER
SIDE
CONSOLE
OUTLET
OUTLET
FLOOR
COCKPIT
COCKPIT FLOOR
FLOOR
OUTLET
FLOOR
OUTLET
COCKPIT
CABIN
EV 2
AIR CONDITIONING/PRESSURIZATION
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6 02-03-09
AVIONICS AND COCKPIT DISPLAYS VENTILATION
DESCRIPTION
The avionics and cockpit displays cooling system ensures the ventilation of the avionics and displays in order to comply
with aircraft reliability and safety requirements.
The system consists of an underfloor fan and avionics cooling valve, either of which pulls air from the cockpit panel area
behind the displays and from above the avionics racks. During ground operations, the fan is operated in high speed mode.
During flight the fan is operated at low speed unless the temperature in the avionics racks reaches 122 ° F (50 °C) in 60
seconds, then the fan operates at high speed. If the temperature rises above 149 ° F (65 °C) during a 60 second time period
while the aircraft is above 10 000 ft the fan is turned off and the avionics cooling valve is opened by the IASC. If the fan
or valve fails, an EQPT RACK COOL FAULT (A) CAS message is displayed. If an overheat condition occurs in the avionics
rack, an EQPT RACK TEMP HIGH (C) CAS message is displayed.
Control and monitoring is normally operated by IASC 1, in the event of failure in the system, a degraded mode, controlled
by IASC 2 is activated and the avionics fan is turned on. If the fan has failed, then the avionics valve opens.
CFO0202002_ 007
DISPLAY
UNITS
CABIN
DOOR
AVIONICS
EXHAUST
FAN
TO AVIONICS VALVE
TO OVERFLOW VALVE
CFO0203002_002
AVIONICS
RACK
CHECK
VALVE
OUTFLOW
VALVE
DISPLAYS
COCKPIT
AVIONICS
VALVE
FAN
REV 1
AIR CONDITIONING/PRESSURIZATION
Volume 2 Flight Crew Operating Manual May 06/2005
02-03-10 CSP 100-6 REV 2
CABIN and COCKPIT AIR DISTRIBUTION SYSTEM
CFO0203002_006
RAM AIR
INLET
PACK
GROUND
CONNECT
FROM
RAM AIR APU
EXHAUST
TO OUTFLOW
VALVE
TOP DISTRIBUTION
COCKPIT SUPPLY
FLOOR DISTRIBUTION
GASPERS
AVIONICS COOLING
REV 2
AIR CONDITIONING/PRESSURIZATION
Sep 13/2004 Flight Crew Operating Manual Volume 2
REV 1 CSP 100-6 02-04-01
PRESSURIZATION
DESCRIPTION
Cabin pressurization is achieved by controlling the leakage rate, or outflow of cabin air through an outflow valve.
The pressurization system has three independent modes of operation:
- Two automatic modes are available from two digital controllers within the Integrated Air System Controllers
(IASC). Each IASC drives the outflow valve through the AUTO drive mechanism of its actuator
- One manual mode is operated from the cabin pressure control panel through IASC 1 analog circuitry which drives
the out flow valve through the manual drive mechanism of its actuator
Two safety valves are pneumatically operated to prevent cabin overpressure and negative pressure conditions. The safety
valves operate independently of the automatic and manual pressurization modes to provide an additional level of protection.
　
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