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SYNC
AIR CONDITIONING
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
AIR CONDITIONING AND PRESSURIZATION
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
02−10−23
AIR CONDITIONING SYSTEM (CONT'D)
Temperature Control − AUTO
The temperature selectors, when selected COLD will cause the ACSC to modulate the TRIM AIR
valves towards closed and when selected HOT will cause the ACSC to modulate the TRIM AIR
valves towards open. The affected compartment trim valve will modulate to attain and maintain the
selected temperature.
The selected temperature and actual temperature will be displayed on the SYSTEMS page and
AIR CONDITIONING synoptic page.
GF0210_027
APU
RES
4.5
5.0
APU
RPM 100 EGT 400
BRAKE TEMP
03 03 03 03
CKPT (°C) FWD
CABIN (°C)
AFT
CABIN (°C)
20
19
Actual Temperature
Selected Temperature
19°C 21°C 22°C
OIL QTY (QTS)
10.4 ENG 10.4
20
21
23
22
20
1300
90
13% 13%
20 0.00
CKPT (°C)
OXYGEN
OPEN OPEN
OUTFLOW VALVES
CAB ALT
CAB RATE
P
0 0
1 2
1 2
1 2
AFT
CABIN (°C)
%
CABIN (°C)
23
19 21 22
FWD
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
L PACK
TRIM AIR
15°C
R PACK
12°C
CKPT FWD AFT
20 °C 20 °C 23 °C
TEMPERATURE
COCKPIT
COLD HOT
FWD CABIN
COLD HOT
AFT CABIN
COLD HOT
AIR CONDITIONING AND PRESSURIZATION
Flight Crew Operating Manual Rev 2A, Apr 11, 2005
CSP 700−5000−6
Volume 2
02−10−24
AIR CONDITIONING SYSTEM (CONT'D)
Temperature Control − AUTO (Cont’d)
With the TRIM AIR ON and the air conditioning PACKS in AUTO, the ACSC modulates the
Temperature Control Valve (TCV). The TCV bypasses hot air around the pack to mix with the cool
air at the Air Cycle Machine (ACM) turbine outlet, to control pack discharge temperature.
PACK DISCHARGE
TEMPERATURE
TRIM AIR ON
PACKS AUTO
PDPS
TO MIXING
MANIFOLD
AIR CYCLE
MACHINE (ACM)
TEMPERATURE
CONTROL VALVE
(TCV)
PLENUM
BLEED
AIR
PACK DISCHARGE
TEMPERATURE
SENSOR (PDTS)
PACK DISCHARGE
PRESSURE SENSOR
GF0210_028
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
L PACK
TRIM AIR
15°C
R PACK
12°C
OFF
TRIM AIR
R PACK
OFF
FAIL
L PACK
OFF
FAIL
In AUTO mode, the temperature is controlled between a minimum of 3°C to a maximum of 70°C.
AIR CONDITIONING AND PRESSURIZATION
Rev 2A, Apr 11, 2005 Flight Crew Operating Manual
CSP 700−5000−6
Volume 2
02−10−25
AIR CONDITIONING SYSTEM (CONT'D)
Temperature Control − AUTO (Cont’d)
The TRIM AIR switch in the ON position, opens the Hot Air Shutoff Valves (HASOV) and the
ACSC modulates the cockpit, forward and aft trim valves.
GF0210_029
BLEED BLEED
RAM AIR
23°C 23°C 23°C
12°C
L PACK
TRIM AIR
15°C
R PACK
Cockpit Trim
Valve
Aft Trim
Valve
Forward Trim
Valve
HASOV
OFF
TRIM AIR
The TRIM AIR switch, when selected in the OFF position, closes the Hot Air Shutoff Valves
(HASOV) and the ACSC closes the cockpit, forward and aft trim valves.
GF0210_030a
TRIM AIR OFF
BLEED BLEED
RAM AIR
23°C 23°C 23°C
L PACK
TRIM AIR
23°C
R PACK
OFF
TRIM AIR
OFF
TRIM AIR
23°C
NOTE
In the event of a single ACSC failure (both channels), the trim air
valve(s) on the affected side will not be controlled. Select the trim air
switch to OFF.
In the event of a dual ACSC failure, operate the packs in MAN.
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