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RAM Air Control <1201>
Figure 08---20---6
Air--Conditioning Panel
Overhead Panel
Vol. 1 08--20--8
ENVIRONMENTAL CONTROL SYSTEM
Air--Conditioning System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Temperature Synoptic and EICAS Indications
Figure 08---20---7
ECS Page
Status Page
RAMAIR OPEN
L RARV FAULT
R RARV FAULT
Vol. 1 08--20--9
ENVIRONMENTAL CONTROL SYSTEM
Air--Conditioning System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
D. Conditioned Air Distribution
Conditioned air, from the left and right air-conditioning packs, is routed through
separate ducting to a distribution mixing manifold. The mixing manifold mixes fresh air
from the packs with recirculated air. The mixing manifold is designed so that the left
pack primarily influences the flight compartment supply temperature. Like--wise,the
right pack primarily influences the passenger compartment supply temperature If either
pack fails, the mixing manifold will allow the remaining pack to supply the entire aircraft.
Conditioned air, to the passenger compartment, is distributed from ducts along each
side of the aircraft. Passenger compartment exhaust air is routed underfloor to the
outflow valves on the aft pressure bulkhead.
Conditioned air, to the flight compartment, is distributed to the side console panels,
gaspers and vents, and avionics units within the instrument panel. Dedicated fans and
ducts direct conditioned air over the flight compartment display units. Flight
compartment exhaust air is routed underfloor through the avionics compartment to the
outflow valve at the aft pressure bulkhead.
Recirculation of the air is provided by two recirculation fans connected to the
distribution manifold. The fans are controlled by a single RECIRC switch on the
air--conditioning panel.
Recirculation Air Control <1201>
Figure 08---20---8
Air--Conditioning Panel
Overhead Panel
Vol. 1 08--20--10
ENVIRONMENTAL CONTROL SYSTEM
Air--Conditioning System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Air Distribution Schematic
Figure 08---20---9
TO DISPLAY AND
AVIONICS COOLING
GASPER SUPPLY
LAVATORY
EXHAUST FAN
RECIRC FILTER RECIRC FILTER
CARGO
COMPARTMENT
SUPPLY
NO.1
NO.2
MIXING MANIFOLD
TEMPERATURE SENSORS
GALLEY
HEATER
MIXING
MANIFOLD
RIGHT
PACK
LEFT
PACK
GASPER SUPPLY
COCKPIT
FORWARD
CABIN
AFT
CABIN
CARGO
AFT PRESSURE
BULKHEAD
VENT
FORWARD CABIN
ACSC 1 TEMPERATURE SENSOR
GALLEY AND
FORWARD LAVATORY
EXHAUST FAN
COCKPIT VENT
TEMPERATURE
SENSOR
RECIRC
FAN NO.2
RECIRC
FAN NO.1
VENT
AFT CABIN
TEMPERATURE
SENSOR
AFT
LAVATORY
RECIRC ON/OFF SWITCH
ACSC 2 T
T
T
T
T
Vol. 1 08--20--11
ENVIRONMENTAL CONTROL SYSTEM
Air--Conditioning System REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
E. Low Pressure Ground Air Connection <1007>
An external ground air connector, located on the right aft fuselage, is provided for
ground air-conditioning. Low pressure compressed air from a ground air conditioning
cart can be supplied directly into flight and passenger compartment distribution
systems.
Low Pressure Ground Air Connection <1007>
Figure 08---20---10
LOW PRESSURE GROUND AIR
CONNECTION PANEL
Vol. 1 08--20--12
ENVIRONMENTAL CONTROL SYSTEM
Air--Conditioning System Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
F. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
ACS
CONT 1 CH A
BATTERY
BUS 1 L1
ACS
CONT 1 CH B DC BUS 2 2 J4
Control
ACS
CONT 2 CH A DC BUS 1 1 K6
ACS
CONT 2 CH B
DC
ESSENTIAL 2 T7
ACS R MAN DC BUS 2 2 K6
ACS L MAN DC
ESSENTIAL 2 T8
Pressure
ACS R
PRESS SENS
DC
ESSENTIAL 2 T11
Air
Conditioning
Sensors ACS L PRESS
SENS DC BUS 2 2 F6
g
CKPT TEMP
SENS DC BUS 1 1 K7
Temperature
Sensors
AFT CABIN
TEMP SENS DC BUS 1 1 J1
FWD CABIN
TEMP SENS DC BUS 2 2 J1
Ram Air RAM AIR SOV BATTERY
BUS 2 P4
R i l ti
RECIRC
FAN 1 AC BUS 1 1 A5
Recirculation
Fan
RECIRC
FAN 2 AC BUS 2 2 A5
FAN MONIT DC BUS 1 1 F6
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