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selector fan speed is moved to the 1, 2, or 3 position the electromechanical
linkage actuates the butterfly valve to the full open
position. The air is then distributed by the variable speed blower fan to
the distribution manifold mounted to the center, aft side of the firewall
Revision 01: 03-27-07
P/N 13772-127 11 of 14
Cirrus Design Section 9
SR22 Supplements
Vent Selection
Conditioned air from the distribution manifold can be proportioned and
directed to passengers and/or the windshield by manipulating the
cabin vent selector. The selector is mechanically linked to butterfly
valves at the entrances to the windshield diffuser and the cabin floor
ducting. There is continuous airflow to the panel and armrest eyeball
outlets. Each occupant can control the flow rate from 'off' to maximum
by rotating the nozzle.
When the selector is in the far left position, both butterfly valves are
closed providing maximum airflow to the panel and armrest eyeball
outlets.
Rotating the selector a quarter-turn clockwise opens the cabin floor
butterfly valve allowing airflow to the rear seat foot warmer diffusers
and the front seat outlets mounted to the underside of each kickplate.
Rotating the selector another quarter-turn clockwise opens the
windshield diffuser butterfly valve which permits shared airflow to the
defrosting mechanism and cabin floor outlets.
When the selector is in the far right position, the cabin floor butterfly
valve is closed providing maximum airflow to the windshield diffuser.
When the full/max defrost position is selected, the air-conditioner is
activated to provide conditioned, dry air to the diffuser to facilitate
windshield defogging.
Temperature Selection
The temperature selector is mechanically linked to the hot and cold air
valves. Rotating the selector simultaneously opens and closes the two
valves, permitting hot and cold air to enter the air-mixing chamber.
When the temperature selector is moved to the snowflake symbol, the
butterfly valve on the firewall completely closes and the air-conditioner
is activated. When recirculation symbol is selected, the fresh air valve
completely closes and cabin air is recirculated to provide for maximum
air-conditioning operation. The A/C ON light will illuminate when the
snowflake or recirculation symbol is selected.
Revision 01: 03-27-07
12 of 14 P/N 13772-127
Section 9 Cirrus Design
Supplements SR22
Figure - 2 (Sheet 1 of 2)
COLD
HOT
1
2
3
NOTE: Illustration depicts settings for Emergency Procedures
Smoke and Fume Elimination.
If source of smoke and fume is firewall forward, turn
Airflow Selector OFF.
Rotating the selector controls the volume
of airflow allowed into the cabin distribution
system by opening and closing a butterfly
valve in the distribution manifold.
When the selector dial exceeds the full
open position, the 3-speed blower fan is
turned on.
Shared airflow to the
defroster, cabin floor,
and panel outlets.
Maximum airflow to
the rear seat foot warmer
diffusers and the front
seat kickplate outlets.
Maximum airflow
to the panel and
armrest air gaspers.
Maximum airflow
to defroster.
Rotating the selector simultaneously
opens and closes the hot and fresh air
butterfly valves, permitting conditioned
(mixed) air to enter distribution system.
Air conditioning
mode.
AC ON illuminated.
Maximum air
conditioning
(recirculation)
mode. AC ON
illuminated.
AC
ON
SR22_FM09_2258A
AIRFLOW VENTS TEMPERATURE
Air Conditioner on.
Air Conditioning System Operation - Serials before G3 Wing
Revision 01: 03-27-07
P/N 13772-127 13 of 14
Cirrus Design Section 9
SR22 Supplements
1 2
3
OFF
COLD
HOT
NOTE: Illustration depicts settings for Emergency Procedures
Smoke and Fume Elimination.
Rotating the selector controls the volume of
airflow allowed into the cabin distribution
system through use of an electro-mechanical
linkage to a butterfly (hot air) valve in the
mixing chamber on the forward firewall.
When the airflow selector fan speed is
moved to the 1, 2, or 3 position the
electro-mechanical linkage actuates the
hot air valve to the full open position and
the 3-speed blower fan is turned on.
Shared airflow to the
defroster, cabin floor,
and panel outlets.
Maximum airflow to
the rear seat foot warmer
diffusers and the front
seat kickplate outlets.
Maximum airflow
to the panel and
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