S
ECTION
7: A
IRPLANE
AND
S
YSTEMS
C
IRRUS
D
ESIGN
E
NVIRONMENTAL
S
YSTEM
SR20
7-64
P/N 11934-005
When the Windshield selector button is pushed, the cabin floor butterfly
valve is closed providing maximum airflow to the windshield diffuser.
Temperature Selection
The temperature selector is electrically linked to the hot and cold air valves.
Rotating the selector simultaneously opens and closes the two valves,
permitting hot and cold air to mix and enter the distribution system.
Rotating the selector clockwise, permits warmer air to enter the system -
counterclockwise, cooler air.
On airplane with the optional Air Conditioning System installed, when the
air conditioning button (snowflake) is pushed, the valve on the firewall
completely closes and the air conditioner is activated. When recirculation
button is pushed, the fresh air valve completely closes and cabin air is recir-
culated to provide for maximum air conditioning operation. When the air
conditioning system is on and the temperature selector is rotated to the full
cool position, recirculating mode can be activated to provide maximum
cabin cooling. Air conditioning or recirculating mode is not available when
the airflow fan selector is in the “0” position. Recirculating mode is not
available unless the air conditioning system is operating.
Reissue A