曝光台 注意防骗
网曝天猫店富美金盛家居专营店坑蒙拐骗欺诈消费者
Vol. 1 08--30--1
ENVIRONMENTAL CONTROL SYSTEM
Avionics Cooling System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
1. AVIONICS COOLING SYSTEM
The electronic flight instruments in the flight compartment instrument panel, control panels
and display units in the center pedestal, and electronic units in the left and right portions of
the underfloor avionics bay are cooled during on-ground and flight operations.
The flight compartment displays are cooled with air from two display fans located under the
flight compartment floor. Fan control is provided by a DSPLY FAN selector knob on the
avionics cooling panel. Normally, only one fan operates at a time (operation is controlled by
the PSEU). In flight, only fan 1 is powered and on the ground, only fan 2 is powered. When
powered, the respective fan draws in air from the flight compartment and mixes it with
conditioned air then supplies the air to the backs of each display. In the event of a fan
failure, the alternate fan can be selected using the selector on the avionics cooling panel. If
both fans fail, the selector is set to STDBY to permit conditioned air to ventilate the displays.
A low flow sensor monitors air flow to ensure appropriate cooling. Check valves prevent loss
of cooling air or reverse flow.
Two avionics exhaust fans are installed under the flight compartment floor. The fans are
used to extract the heated air from behind the flight compartment displays and from the
avionics equipment. Fan control is provided by a AVIONICS FAN selector knob on the
avionics cooling panel. Normally, only one fan operates at a time (operation is controlled by
the PSEU). In flight, only fan 1 is powered and on the ground, only fan 2 is powered. In the
event of a fan failure, the alternate fan can be selected using the selector on the avionics
cooling panel. On the ground, the heated air is dumped overboard through the ground
outflow valve. In flight, the heated air is ducted to the pressurization outflow valve and
dumped overboard.
Vol. 1 08--30--2
ENVIRONMENTAL CONTROL SYSTEM
Avionics Cooling System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Cockpit Displays and Avionics Cooling System Schematic
Figure 08---30---1
AVIONICS
EXHAUST
FAN 1
AVIONICS
EXHAUST
FAN 2
FORWARD WING BOX
PRESSURE BULKHEAD
MIXING MANIFOLD
GROUND
VALVE
AVIONICS COOLING CONTROL PANEL
DSPLY FAN
FLT
ALTN
STDBY
GND
ALTN
NORM
AVIONICS FAN
FLT
ALTN
GND
ALTN
NORM
DISPLAYS
COCKPIT
AIR
DISPLAY
COOLING
FAN NO.2
PICCOLO DUCTING
DIFFUSER
COCKPIT
DISPLAY
COOLING
FAN NO.1
ACSC 2
F
ACSC 1
PSEU
AVIONICS
COMPARTMENT
LOW
FLOW
SENSOR
Vol. 1 08--30--3
ENVIRONMENTAL CONTROL SYSTEM
Avionics Cooling System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Avionics Cooling System---General
Figure 08---30---2
CHECK
VALVE
EXHAUST
FLIGHT COMPARTMENT
RECIRCULATED AIR
COCKPIT DISPLAYS
COCKPIT
DISPLAY
DUCT
DISPLAY
CHECK VALVES FANS
LOW FLOW
SENSOR
CONDITIONED AIR
TO THE
AVIONICS
EXHAUST
LOW FLOW
SENSOR
Vol. 1 08--30--4
ENVIRONMENTAL CONTROL SYSTEM
Avionics Cooling System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Display Fan Controls
Figure 08---30---3
Avionics Cooling Fan Selector Panel
Center Pedestal
DSPLY FAN
FLT
ALTN
STDBY
GND
ALTN
NORM
AVIONICS FAN
FLT
ALTN
GND
ALTN
NORM
DSPLY FAN
NORM -- Fans in display duct operate in automatic mode providing
airflow through flight compartment displays:
Fan 1 during flight, and
Fan 2 during ground operations.
FLT ALTN -- Selects fan 2 as the alternate fan in flight.
GND ALTN -- Selects fan 1 as the alternate fan on ground.
STDBY -- Selects conditioned air shut--off valve open.
AVIONICS FAN
NORM -- Fans in exhaust duct operate in automatic mode to exhaust
hot air from the flight compartment displays and avionics compartment:
Fan 1 during flight, and
Fan 2 during ground operations.
FLT ALTN -- Selects fan 2 as the alternate fan in flight.
GND ALTN -- Selects fan 1 as the alternate fan on ground.
Vol. 1 08--30--5
ENVIRONMENTAL CONTROL SYSTEM
Avionics Cooling System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：
庞巴迪挑战者手册2(130)
