AIR CONDITIONING SYSTEM (CONT'D)
Flow Control System (Cont’d)
Flow selections are as follows:
GF0210_023
HIGH:
The flow demand per pack decreases linearly with
airplane altitude, from 40 lb/min at sea level to 23
lb/min at 51,000 feet (controlled by ACSC).
NORM:
The flow demand per pack decreases linearly
with airplane altitude from 30 lb/min at sea level
to 18 lb/min at 51,000 feet.
Flow is limited to a maximum value of 40lb/min
per pack. The BMC will prevent two packs being
supplied by one engine.
In case of single pack operation, the high flow
schedule is automatically selected by the ACSC.
LO:
The flow demand is half, 20 lb/min, of the high
flow demand but is limited to a minimum of 18
lb/min (controlled by the ACSC).
MAN:
The flow control valve is driven to the full open
position (ACSC is disabled).
L PACK
L PACK
HIGH
LOW
LO HIGH
PACK CONTROL
NORM
MAN
LO HIGH
PACK CONTROL
NORM
MAN
LO HIGH
PACK CONTROL
NORM
MAN
LO HIGH
PACK CONTROL
NORM
MAN
AIR CONDITIONING AND PRESSURIZATION
REV 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
02−10−21
AIR CONDITIONING SYSTEM (CONT'D)
Ram Air Ventilation
An alternate supply of fresh air is available via the ram air system and has been designed for use
inflight at an altitude of 15,000 feet or less.
The ram air system is picked up at the ram air inlet at the base of the vertical fin and is used
primarily to provide cooling for the heat exchangers of the cooling packs.
GF0210_024
RAM AIR INLET
The ram air valve is closed in normal operations. It can be switched ON manually by means of a
guarded switch on the BLEED/AIR COND panel. The ram air valve is opened for unpressurized
flight operations below 15,000 feet.
GF0210_025
RAM AIR INLET
SCOOP
RIGHT PACK
RAM AIR
VALVE
RAM AIR ON
AIR CONDITIONING
BLEED BLEED
RAM AIR
19°C 21°C 22°C
CKPT FWD AFT
20 °C 20 °C 23 °C
15 °C 15 °C 15 °C
L PACK
TRIM AIR
15°C
R PACK
12°C
ON
RAM AIR
ON
RAM AIR
AIR CONDITIONING AND PRESSURIZATION
Flight Crew Operating Manual REV 51, Aug 14, 2006
CSP 700−6
Volume 2
02−10−22
AIR CONDITIONING SYSTEM (CONT'D)
Temperature Control
In normal operation, with the packs in AUTO mode and trim system ON, the pack discharge
temperature is automatically controlled by the ACSC.
Each ACSC is divided into two fully redundant channels A and B. During flight, only one channel is
active and controls the ECS. The inactive channel also computes the control data but does not
command outputs.
ACSC 1 controls the temperature in the cabin (forward and aft trim air valves) and ACSC 2
controls the temperature of the cockpit (cockpit trim air valve).
GF0210_026 BMC1
DAU 3 DAU 1 DAU 2 DAU 4
LEFT
SYSTEM
VALVES
RIGHT
SYSTEM
VALVES
LEFT
SYSTEM
SENSORS
RIGHT
SYSTEM
SENSORS
ACSC 1 ACSC 2
PILOT
EMS CDU
CO−PILOT
EMS CDU BMC 2
A
B
MAN
A
B
MAN
DC BUS1 DC BUS2
DC BUS2 DC BUS1
DC ESS DC ESS
ASCB
SPDAs SPDAs
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
TOTAL FUEL (LBS) 41550
1.54 1.54
73.3 73.3
789 789
14600 10000 14600
2350 ND
STAB
NU
NL RUDDER
LWD RWD
NR
TRIMS
7.2
N2
FF (PPH)
OIL TEMP
OIL PRESS
93.4
5750
115
81
93.4
5750
115
81
EPR
N1
ITT
AIL
1.65 1.65
CRZ
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 41, Jul 08, 2004 Flight Crew Operating Manual
CSP 700−6
Volume 2
02−10−23
AIR CONDITIONING SYSTEM (CONT'D)
　
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