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To enter a new LDG ELEV, hold the UP/DN switch until desired field elevation is reached.
GF0210_066
1300
0.00
300
120
CAB ALT
P
CAB RATE
LDG ELEV
MAN
FMS
UP
DN
LDG ELEV
Manual Mode
In the manual mode, cabin pressure is manually controlled by the crew selecting the applicable
switches on the Pressurization control panel.
AUTO/MAN switch
Used to select mode of
operation.
−Indicates AUTO
mode is selected.
−Indicates MAN
mode is selected.
MAN ALT Toggle switch
Used to control cabin altitude in
manual mode.
Spring loaded to mid position.
UP − Commands cabin to climb.
DN − Commands cabin to descend.
Selecting the AUTO/MAN switch to MAN then
back to AUTO will enable the other CPC.
NOTE
GF0210_067
MAN
AUTO/
MAN
MAN
MAN ALT
UP
DN
MAN
MAN
Selecting MAN will display both outflow valve position indicators, display an analog rate of change
gauge and eliminate the LDG ELEV on the status page and display a status message on EICAS.
MAN Mode Data Display
CAB RATE − Sweep range
displayed in feet (−2500 to 2500 fpm).
LDG ELEV − Not displayed. Crew
OUTFLOW VALVES Position Indicators must monitor CAB ALT.
Displayed when MAN selected and measured in
percent. Also displayed when EMER DEPRESS
selected, or OUTFLOW VLV closed, or DITCHING
selected.
GF0210_068
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
MAN PRESS CONTROL
MAN
When the MAN ALT (spring loaded) toggle switch is selected to UP, both outflow valves open
slowly, and the cabin altitude increases proportionally to the outflow change.
GF0210_069
48% 48%
OPEN OPEN
OUTFLOW VALVES
1 2
MAN ALT
UP
DN
AIR CONDITIONING AND PRESSURIZATION
REV 51, Aug 14, 2006 Flight Crew Operating Manual
CSP 700−6
Volume 2
02−10−57
MODES OF OPERATION (CONT'D)
Manual Mode (Cont’d)
When the MAN ALT toggle switch is selected to DN, both outflow valves close slowly and the
cabin altitude decreases proportionally to the outflow change.
GF0210_070
10% 10%
OPEN OPEN
OUTFLOW VALVES
1 2
MAN ALT
UP
DN
The desired control (climb, level, descent) is maintained by adjusting, if necessary, the outflow
valve positions, according to flow or differential pressure changes.
Manual Mode Operation
Operate pressurization, MAN/ALT toggle switches as required:
• To increase cabin altitude, select MAN/ALT toggle switch to UP momentarily and monitor
climb rate and cabin altitude.
• To decrease cabin altitude, select MAN/ALT toggle switch to DN momentarily and monitor
descent rate and cabin altitude.
• To maintain cabin altitude, select MAN/ALT toggle switch to mid position, when reaching
target cabin altitude (see the chart below).
Cruise Flight
Level
180 200 220 240 260 280 290 310 330
Target Cabin
Altitude
600 800 1000 1200 1400 1700 1900 2200 2400
Target Δ P 7.05 7.55 8.00 8.40 8.75 9.05 9.20 9.40 9.65
Cruise Flight
Level
350 370 390 410 430 450 470 490 510
Target Cabin
Altitude
2700 2900 3300 3700 4100 4500 4900 5300 5700
Target Δ P 9.90 10.05 10.20 10.25 10.30 10.30 10.30 10.30 10.30
AIR CONDITIONING AND PRESSURIZATION
Flight Crew Operating Manual REV 51, Aug 14, 2006
CSP 700−6
Volume 2
02−10−58
MODES OF OPERATION (CONT'D)
Manual Mode Operation (Cont’d)
Effectivity:
• Airplanes 9002 thru 9158 not incorporating Service Bulletin:
• SB 700−21−034, Modification − Pressurization Control − Cabin Altitude Reduction During
Flight for Improved Passenger Comfort.
Cruise Flight
Level
180 200 220 240 260 280 290 310 330
Target Cabin
Altitude
1100 1400 1600 1900 2200 2600 2800 3100 3400
Target Δ P 6.75 7.20 7.65 8.00 8.35 8.60 8.70 8.95 9.15
Cruise Flight
Level
350 370 390 410 430 450 470 490 510
Target Cabin
Altitude
3800 4100 4500 5000 5500 6000 6400 6900 7200
Target Δ P 9.35 9.50 9.60 9.60 9.60 9.60 9.60 9.60 9.60
• During descent, select MAN/ALT toggle switch adjust Up or DN to attain landing elevation.
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