Cirrus Design Section 7
SR22 Systems Description
P/N 13772-002 7-65P/N 13772-002 7-65
Airflow Selection
The airflow selector on the system control panel regulates the volume
of airflow allowed into the cabin distribution system. When the airflow
selector is moved past the OFF position an electro-mechanical linkage
actuates a valve in the mixing chamber on the forward firewall to the
full open position. The air is then distributed by either ram air or
blower fan to the distribution manifold mounted to the center, aft side of
the firewall. The airflow system modes are as follows: OFF (ram air), 1
(low fan), 2 (medium fan), and 3 (high fan).
Vent Selection
Air from the distribution manifold is proportioned and directed to
passengers and/or the windshield by pressing the cabin vent selector
buttons which electrically actuate butterfly valves at the entrances to
the windshield diffuser and the cabin floor ducting.
When the Temperature Selector is in the blue “cool” zone, 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 Panel selector button is pushed, both butterfly valves are
closed providing maximum airflow to the instrument panel and armrest
eyeball outlets.
Pressing the Panel-Foot selector button 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.
Selecting Panel-Foot-Windshield button opens the windshield diffuser
butterfly valve which permits shared airflow to the defrosting
mechanism and cabin floor outlets.
When the Windshield selector button is pushed the cabin floor butterfly
valve is closed providing maximum airflow to the windshield diffuser.
Reissue A
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