Cirrus SR22 Pilot Operating Handbook page 263

Cirrus Design
SR22
Maximum airflow to
the rear seat foot warmer
diffusers and the front
seat kickplate outlets.
OFF
AIRFLOW
Maximum airflow
to the panel and
armrest air gaspers.
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.
NOTE: Illustration depicts settings for Emergency Procedures
Smoke and Fume Elimination.
If source of smoke and fume is firewall forward, turn
Airflow Selector OFF.
Environmental System Operation - Serials 2438 and subs*
P/N 13772-001
Revision A10
Shared airflow to the
defroster, cabin floor,
and panel outlets.
VENTS
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.
Figure 7-20
Airplane Description
Air conditioning
mode.
AC ON illuminated.
Maximum air
conditioning
(recirculation)
mode. AC ON
illuminated.
TEMPERATURE
Air Conditioner on.
SR22_FM09_2606A
Section 7
7-89