CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
ENVIRONMENTAL SYSTEMS
1. GENERAL
This section covers those systems and components used to furnish a means of heating, cooling, and treating the air used to ventilate the areas of the fuselage within the pressure seals. Includes equipment cooling, heater, valves, and ducts.
EFFECTIVITY:
All
21-00
Page 1
15 Jun 2010
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
A. Cabin Air System - Serials 22-0002 thru 22-1601, 22-1603 thru 22-1820, 22-1822 thru 22-1839, 221841 thru 22-1862 (See Figure 21-001)
The cabin air distribution system consists of fresh air inlets in each wing, a heat exchanger around the
RH engine exhaust muffler, an air mixing chamber, air ducting for distribution, a windshield diffuser,
and crew and passenger air vents.
Fresh air enters the cabin air distribution system through inlets located in each wing leading edge and
is ducted to the crew and passenger air vents. Screens in the wing inlet ducts prevents large objects
from entering the cabin air system. Fresh air also enters the upper RH cowl inlet, flows through the
upper cowl, and is ducted to a heat exchanger surrounding the RH engine exhaust muffler. The heated
air is then routed to the hot air valve, mounted to the forward side of the firewall, that allows the heated
air to enter the cabin air distribution system.
The heated air from the hot air valve and the fresh air from the wing inlets are allowed to mix in the air
mixing chamber mounted to the rear side of the firewall behind the instrument panel. The mixed air is
then distributed by ram air to the passenger outlets and/or to the windshield diffuser. Airflow is ducted
directly to all panel air vents.
The crew panel air vents are chest high outlets mounted in the RH and LH bolster panels. The crew
floor air vents are mounted to the bottom of each kick plate. The passenger panel air vents are chest
high outlets mounted in the armrests integral to the LH and RH cabin wall trim panels. The passenger
floor air vents are mounted to the bottom portion of the LH and RH cabin wall trim panels. The windshield diffuser, located in the glareshield assembly, directs conditioned air to the base of the windshield.
Temperature, volume, and flow selection are regulated by manipulation of the cabin temperature and
cabin air selector knobs on the lower RH side of the instrument panel.
21-00
Page 2
15 Jun 2010
EFFECTIVITY:
Serials 22-0002 thru 22-1601, 22-1603 thru 22-1820,
22-1822 thru 22-1839, 22-1841 thru 22-1862
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
RAM AIR
HEAT EXCHANGER
AIR MIXING
CHAMBER
CABIN HEAT/
DEFROST
SELECT
HOT AIR
VALVE
HEAT
OFF
TEMP.
CONTROL
COLD
WINDSHIELD
DEFROST
DIFFUSER
AIR GASPER
FRESH AIR
INTAKE
FRESH AIR
INTAKE
FOOT-WARMER
DIFFUSER
CONDITIONED
AIR
FRESH AIR
MECHANICAL
CONNECTION
Serials 22-0002 thru 22-1601, 22-1603 thru 22-1820,
22-1822 thru 22-1839, 22-1841 thru 22-1862.
SR22_MM21_1969C
Figure 21-001
Heating and Ventilation System - Serials 22-0002 thru 22-1862
EFFECTIVITY:
Serials 22-0002 thru 22-1862
21-00
Page 3
15 Jun 2010
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
B. Cabin Air System - Serials 22-1602, 22-1821, 22-1840, 22-1863 thru 22-2437 (See Figure 21-002)
The cabin air distribution system consists of a fresh air inlet in the RH wing, a heat exchanger around
the RH engine exhaust muffler, an air mixing chamber, air ducting for distribution, a distribution manifold, a windshield diffuser, and crew and passenger air vents. An optional blower fan may also be
installed.
Fresh air enters the cabin air distribution system through an inlet on the inboard, leading edge of the
RH wing and is ducted to the air mixing chamber. A screen in the wing inlet duct prevents large objects
from entering the cabin air system. Fresh air also enters the upper RH cowl inlet, flows through the
upper cowl, and is ducted to a heat exchanger surrounding the RH engine exhaust muffler. The heated
air is then routed to the hot air valve, mounted to the forward side of the firewall, that allows the heated
air to enter the cabin air distribution system.
The heated air from the hot air valve and the fresh air from the wing inlet are allowed to mix in the air
mixing chamber located under the RH crew seat. The mixed air is then distributed by either ram air or
by optional blower fan to the distribution manifold mounted to the center, aft side of the firewall. The
distribution manifold uses butterfly valves to control airflow to the floor and defrost vents. Airflow is
ducted directly to all panel air vents.
The crew panel air vents are chest high outlets mounted in the RH and LH bolster panels. The crew
floor air vents are mounted to the bottom of each kick plate. The passenger panel air vents are chest
high outlets mounted in the armrests integral to the LH and RH cabin wall trim panels. The passenger
floor air vents are mounted to the bottom portion of the LH and RH cabin wall trim panels. The windshield diffuser, located in the glareshield assembly, directs conditioned air to the base of the windshield.
Temperature, volume, and flow selection are regulated by manipulation of the cabin airflow, cabin
vents, and cabin temperature selector knobs on the lower RH side of the instrument panel.
An optional air conditioning system is available on these airplanes. Refer to the Air Condition section
below for additional information on this system. (Refer to 21-00)
21-00
Page 4
15 Jun 2010
EFFECTIVITY:
Serials 22-1602, 22-1821, 22-1840, 22-1863 thru 222437
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
VENTS
RAM AIR
HEAT EXCHANGER
TEMPERATURE
COLD
AIRFLOW
WINDSHIELD
DIFFUSER
HOT AIR
VALVE
HOT
OFF
FLOOR AIRFLOW
PANEL AIRFLOW
DISTRIBUTION
MANIFOLD
AIR GASPER
RAM AIR
VENT
ASSEMBLY
FRESH AIR
VALVE
FOOT-WARMER
DIFFUSER
NOTE: Illustration depicts maximum
cabin cooling airflows and
selector settings.
Serials 22-1863 thru 22-2333, 22-2335 thru 22-2419,
22-2421 thru 22-2437 w/o Fan.
SR22_MM21_2340B
Figure 21-002
Heating and Ventilation System - Serials 22-1863 thru 22-2437 w/o Fan (Sheet 1 of 3)
EFFECTIVITY:
Serials 22-1863 thru 22-2437 w/o Fan
21-00
Page 5
15 Jun 2010
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
VENTS
RAM AIR
HEAT EXCHANGER
TEMPERATURE
COLD
AIRFLOW
1
WINDSHIELD
DIFFUSER
HOT AIR
VALVE
2
HOT
OFF
FLOOR AIRFLOW
PANEL AIRFLOW
DISTRIBUTION
MANIFOLD
AIR MIXING
CHAMBER
AIR GASPER
RAM AIR
FRESH AIR
VALVE
FOOT-WARMER
DIFFUSER
NOTE: Illustration depicts maximum
cabin cooling airflows and
selector settings.
FAN
ASSEMBLY
Serials 22-1821, 22-1863 thru 22-2333, 22-2335 thru 22-2419,
22-2421 thru 22-2437 w/ Fan.
SR22_MM21_2325B
Figure 21-002
Heating and Ventilation System - Serials 22-1863 thru 22-2437 w/ Fan (Sheet 2 of 3)
21-00
Page 6
15 Jun 2010
EFFECTIVITY:
Serials 22-1863 thru 22-2437 w/ Fan
CIRRUS
AIRPLANE MAINTENANCE MANUAL
VENTS
MODELS SR22 AND SR22T
COMPRESSOR
S
RAM AIR
P
HEAT EXCHANGER
TEMPERATURE
1
COLD
HOT AIR
VALVE
WINDSHIELD
DIFFUSER
AIRFLOW
AC
ON
2
3
HOT
OFF
FLOOR AIRFLOW
PANEL AIRFLOW
DISTRIBUTION
MANIFOLD
AIR MIXING
CHAMBER
AIR GASPER
RAM AIR
S
P
FOOT-WARMER
DIFFUSER
FRESH AIR
VALVE
EVAPORATOR
ASSEMBLY
RECIRCULATION
CHECK VALVE
NOTE: Illustration depicts maximum
cabin cooling airflows and
selector settings.
CONDENSER
ASSEMBLY
Serials 22-1602, 22-1840, 22-1863 thru 22-2333,
22-2335 thru 22-2419, 22-2421 thru 22-2437 w/ Air Conditioning.
SR22_MM21_2236B
Figure 21-002
Heating and Ventilation System - Serials 22-1863 thru 22-2437 w/ Air Conditioning (Sheet 3 of 3)
EFFECTIVITY:
Serials 22-1863 thru 22-2437 w/ Air Conditioning
21-00
Page 7
15 Jun 2010
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
C. Cabin Air System - Serials 22-2438 & subs (See Figure 21-003)
The cabin air distribution system consists of a fresh air inlet in the lower RH cowl, a heat exchanger
around the RH engine exhaust muffler, an air mixing chamber, air ducting for distribution, a distribution
manifold, a windshield diffuser, and crew and passenger air vents. An optional blower fan may also be
installed.
Fresh air enters the cabin air distribution system through a NACA vent on the RH lower cowl and is
ducted to the air mixing chamber mounted to the forward side of the firewall. Fresh air also enters the
upper RH cowl inlet, flows through the upper cowl, and is ducted to a heat exchanger surrounding the
RH engine exhaust muffler. The heated air is routed to the air mixing chamber to be mixed with the
fresh air. The mixed air is then distributed by either ram air or by optional blower fan to the distribution
manifold mounted to the center, aft side of the firewall. The distribution manifold uses butterfly valves
to control airflow to the floor and defrost vents. Airflow is ducted directly to all panel air vents.
The crew panel air vents are chest high outlets mounted in the RH and LH bolster panels. The crew
floor air vents are mounted to the bottom of each kick plate. The passenger panel air vents are chest
high outlets mounted in the armrests integral to the LH and RH cabin wall trim panels. The passenger
floor air vents are mounted to the bottom portion of the LH and RH cabin wall trim panels. The windshield diffuser, located in the glareshield assembly, directs conditioned air to the base of the windshield.
Serials w/ Perspective Avionics: Additional crew vents are located at LH and RH display panels.
Temperature, volume, and flow selection are regulated by manipulation of the cabin airflow, cabin
vents, and cabin temperature selector controls on the lower RH side of the instrument panel.
An optional air conditioning system is available on these airplanes. Refer to the Air Condition section
below for additional information on this system. (Refer to 21-00)
21-00
Page 8
15 Jun 2010
EFFECTIVITY:
Serials 22-2438 & subs
CIRRUS
AIRPLANE MAINTENANCE MANUAL
RAM AIR
RAM AIR
AIRFLOW
OFF
MODELS SR22 AND SR22T
ON
HOT AIR
VALVE
HEAT
EXCHANGER
AIR MIXING
CHAMBER
FRESH AIR
VALVE
TEMPERATURE
AIR FLOW VALVE
VENTS
COLD
SERVO MOTOR
HOT
WINDSHIELD
DIFFUSER
FLOOR AIRFLOW
DISTRIBUTION
MANIFOLD
PANEL AIRFLOW
AIR GASPER
FOOT-WARMER
DIFFUSER
NOTE: Illustration depicts maximum
cabin cooling airflows and
selector settings.
VENT
ASSEMBLY
Serials 22-2334, 22-2420, 22-2438 thru 22-3025,
22-3026 & subs w/o Fan & w/o Perspective Avionics.
SR22_MM21_2506B
Figure 21-003
Heating and Ventilation System - Serials 22-2438 & subs w/o Fan, w/o Perspective Avionics (Sheet 1 of 3)
EFFECTIVITY:
Serials 22-2438 & subs w/o Fan, w/o Perspective Avionics
21-00
Page 9
31 May 2011
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
RAM AIR
RAM AIR
HOT AIR
VALVE
HEAT
EXCHANGER
AIRFLOW
OFF
1
AIR MIXING
CHAMBER
2
3
FRESH AIR
VALVE
TEMPERATURE
AIR FLOW VALVE
COLD
SERVO MOTOR
VENTS
HOT
WINDSHIELD
DIFFUSER
FLOOR AIRFLOW
PANEL AIRFLOW
DISTRIBUTION
MANIFOLD
AIR GASPER
FAN
ASSEMBLY
FOOT-WARMER
DIFFUSER
NOTE: Illustration depicts maximum
cabin cooling airflows and
selector settings.
Serials 22-2334, 22-2420, 22-2438 thru 22-3025,
22-3026 & subs w/ Fan & w/o Perspective Avionics.
SR22_MM21_2508B
Figure 21-003
Heating and Ventilation System - Serials 22-2438 & subs w/ Fan, w/o Perspective Avionics (Sheet 2 of 3)
21-00
Page 10
31 May 2011
EFFECTIVITY:
Serials 22-2438 & subs w/ Fan, w/o Perspective Avionics
CIRRUS
AIRPLANE MAINTENANCE MANUAL
1
RAM AIR
RAM AIR
AIRFLOW
OFF
MODELS SR22 AND SR22T
S
2
P
HOT AIR
VALVE
3
HEAT
EXCHANGER
AIR MIXING
CHAMBER
COMPRESSOR
FRESH AIR
VALVE
TEMPERATURE
AIR FLOW VALVE
VENTS
COLD
SERVO MOTOR
HOT
WINDSHIELD
DIFFUSER
FLOOR AIRFLOW
PANEL AIRFLOW
DISTRIBUTION
MANIFOLD
AIR GASPER
S
P
FOOT-WARMER
DIFFUSER
EVAPORATOR
ASSEMBLY
RECIRCULATION
CHECK VALVE
NOTE: Illustration depicts maximum
cabin cooling airflows and
selector settings.
CONDENSER
ASSEMBLY
Serials 22-2334, 22-2420, 22-2438 thru 22-3025,
22-3026 & subs w/ Air Conditioning & w/o Perspective Avionics.
SR22_MM21_2509B
Figure 21-003
Heating and Ventilation System - Serials 22-2438 & subs w/ Air Conditioning, w/o Perspective Avionics (Sheet 3 of 3)
EFFECTIVITY:
Serials 22-2438 & subs w/ Air Conditioning, w/o Perspective Avionics
21-00
Page 11
31 May 2011
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
D. Cabin Air System - Serials 22-3026 & subs (See Figure 21-004)
An optional air conditioning system is available on these airplanes. Refer to the Air Condition section
below for additional information on this system. (Refer to 21-00)
21-00
Page 12
31 May 2011
EFFECTIVITY:
Serials 22-3026 & subs
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
RAM AIR
RAM AIR
HOT AIR
VALVE
HEAT
EXCHANGER
AIR MIXING
CHAMBER
FRESH AIR
VALVE
AIR FLOW VALVE
CONTROL PANEL
SERVO MOTOR
WINDSHIELD
DIFFUSER
FLOOR AIRFLOW
DISTRIBUTION
MANIFOLD
PANEL AIRFLOW
AIR GASPER
FOOT-WARMER
DIFFUSER
VENT
ASSEMBLY
NOTE: Illustration depicts maximum
cabin cooling airflows and
selector settings.
Serials 22-3026 & subs w/o Fan & w/ Perspective Avionics.
SR22_MM21_2879
Figure 21-004
Heating and Ventilation System - Serials 22-3026 & subs w/o Fan, w/ Perspective Avionics (Sheet 1 of 3)
EFFECTIVITY:
Serials 22-3026 & subs w/o Fan, w/ Perspective Avionics
21-00
Page 13
31 May 2011
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
RAM AIR
RAM AIR
HOT AIR
VALVE
HEAT
EXCHANGER
AIR MIXING
CHAMBER
FRESH AIR
VALVE
AIR FLOW VALVE
CONTROL PANEL
SERVO MOTOR
WINDSHIELD
DIFFUSER
FLOOR AIRFLOW
DISTRIBUTION
MANIFOLD
PANEL AIRFLOW
AIR GASPER
FAN
ASSEMBLY
FOOT-WARMER
DIFFUSER
NOTE: Illustration depicts maximum
cabin cooling airflows and
selector settings.
Serials 22-3026 & subs w/ Fan & w/ Perspective Avionics.
SR22_MM21_2877
Figure 21-004
Heating and Ventilation System - Serials 22-3026 & subs w/ Fan & Perspective Avionics (Sheet 2 of 3)
21-00
Page 14
31 May 2011
EFFECTIVITY:
Serials 22-3026 & subs w/ Fan & Perspective Avionics
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
RAM AIR
RAM AIR
S
P
HOT AIR
VALVE
HEAT
EXCHANGER
AIR MIXING
CHAMBER
COMPRESSOR
WINDSHIELD
DIFFUSER
FRESH AIR
VALVE
AIR FLOW VALVE
SERVO MOTOR
PANEL AIRFLOW
AIR GASPER
CONTROL PANEL
FLOOR AIRFLOW
DISTRIBUTION
MANIFOLD
S
P
FOOT-WARMER
DIFFUSER
EVAPORATOR
ASSEMBLY
RECIRCULATION
CHECK VALVE
NOTE: llustration depicts maximum cabin
cooling airflows and selector settings.
CONDENSER
ASSEMBLY
Serials 22-3026 & subs w/ Air Conditioning & w/ Perspective Avionics.
SR22_MM21_2875
Figure 21-004
Heating and Ventilation System - Serials 22-3026 & subs w/ Air Conditioning & Perspective Avionics (Sheet 3 of 3)
EFFECTIVITY:
Serials 22-3026 & subs w/ Air Conditioning & Perspective Avionics
21-00
Page 15
31 May 2011
CIRRUS
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
E. Cabin Air System - Serials 22T-0001 & subs (See Figure 21-005)
The cabin air distribution system consists of a fresh air inlet in the lower RH cowl, a heat exchanger
around the crossover exhaust pipe, an air mixing chamber, air ducting for distribution, a distribution
manifold, a windshield diffuser, and crew and passenger air vents. An optional blower fan may also be
installed.
Fresh air enters the cabin air distribution system through a NACA vent on the RH lower cowl and is
ducted to the air mixing chamber mounted to the forward side of the firewall. Fresh air also enters the
cabin air distribution system through a NACA vent on the LH lower cowl and a second NACA vent on
the RH lower cowl. This air is ducted through the turbochargers to the intercoolers. Ducts on the rear
port of the intercoolers direct the air to a heat exchanger on the crossover exhaust pipe. The heated air
is routed to the air mixing chamber to be mixed with the fresh air. A temperature sensor, located in the
cabin air coupler duct, prevents system overheating by monitoring duct temperature. If the temperature becomes too hot, the sensor sends a signal to the actuator to adjust the amount of cold air entering the system. The mixed air is then distributed by either ram air or by optional blower fan to the
distribution manifold mounted to the center, aft side of the firewall. The distribution manifold uses butterfly valves to control airflow to the floor and defrost vents. Airflow is ducted directly to all panel air
vents.
For over-temperature protection (the turbocharger bleed air is further heated, under some conditions
the hot air source temperature may be in excess of 300°F), the controller monitors mixed air temperature through a sensor downstream of the mixing chamber. If mixed air temperature exceeds duct temperature limit, the hot air flow is reduced and fresh airflow increased until temperature is reduced.
Valves are automatically cycled to ensure supply temperature is maintained below duct temperature
limits. The crew panel air vents are chest high outlets mounted in the RH and LH bolster panels. The
crew floor air vents are mounted to the bottom of each kick plate. The passenger panel air vents are
chest high outlets mounted in the armrests integral to the LH and RH cabin wall trim panels. The passenger floor air vents are mounted to the bottom portion of the LH and RH cabin wall trim panels. The
windshield diffuser, located in the glareshield assembly, directs conditioned air to the base of the windshield. Additional crew vents are located at LH and RH display panels.
Temperature, volume, and flow selection are regulated by manipulation of the cabin airflow, cabin
vents, and cabin temperature selector controls on the lower RH side of the instrument panel.
21-00
Page 16
15 Dec 2014
EFFECTIVITY:
Serials 22T-0001 & subs
CIRRUS
F.
AIRPLANE MAINTENANCE MANUAL
MODELS SR22 AND SR22T
Air Conditioning System - Serials 22-1602, 22-1821, 22-1840, 22-1863 & subs, 22T-0001 & subs
(See Figure 21-002), (See Figure 21-003), (See Figure 21-004), (See Figure 21-005)
The air conditioning system consists of an engine driven compressor, condenser assembly with integral blower fan and receiver-drier, evaporator assembly with integral expansion valve assembly, and
all associated plumbing and control mechanisms.
The R134A refrigerant enters the engine mounted compressor as a vapor and is pressurized until the
heat-laden vapor reaches a point much hotter than the outside air. The compressor then pumps the
vapor to the condenser where it cools, changes to a liquid, and passes to the receiver-drier. The
receiver-drier’s function is to filter, remove moisture, and ensure a steady flow of liquid refrigerant into
the evaporator through the expansion valve - a temperature controlled metering valve which regulates
the flow of liquid refrigerant to the evaporator. Inside the evaporator, the liquid refrigerant changes
state to a gas and in doing so, absorbs heat. The evaporator then absorbs the heat from the air passing over the coils and the moisture from the air condenses and is drained overboard through the belly
of the aircraft. From the evaporator, the refrigerant vapor returns to the compressor where the cycle is
repeated. During normal air-conditioning operation, ram air from the fresh air intake flows into the
evaporator assembly, is cooled as it passes through the evaporator coils, and is then ducted forward to
the distribution manifold. During maximum air-conditioning operation - or recirculation mode - the fresh
air valve closes and valves in the evaporator assembly open allowing cabin air to be recirculated and
further cooled as the air passes through the evaporator coils and ducted forward to the distribution
manifold. Conditioned air is circulated through the system by ram air or by the blower fan mounted
adjacent to the evaporator.
EFFECTIVITY:
Serials 22-1602, 22-1821, 22-1840, 22-1863 & subs,
22T-0001 & subs
21-00
Page 17
15 Dec 2014
CIRRUS
AIRPLANE MAINTENANCE MANUAL
RAM AIR
MODELS SR22 AND SR22T
RAM AIR
RAM AIR
CROSSOVER TUBE
HOT AIR
VALVE
MIXING
CHAMBER
FRESH AIR
VALVE
AIR FLOW VALVE
CONTROL PANEL
SERVO MOTOR
WINDSHIELD
DIFFUSER
FLOOR AIRFLOW
DISTRIBUTION
MANIFOLD
PANEL AIRFLOW
AIR GASPER
FOOT-WARMER
DIFFUSER
VENT
ASSEMBLY
NOTE: Illustration depicts maximum
cabin cooling airflows and
selector settings.
Serials 22T-0001 & subs w/o Fan.
SR22_MM21_3260
Figure 21-005
Heating and Ventilation System - Serials 22T-0001 & subs w/o Fan (Sheet 1 of 3)
21-00
Page 18
15 Dec 2014
EFFECTIVITY:
Serials 22T-0001 & subs w/o Fan
CIRRUS
AIRPLANE MAINTENANCE MANUAL
RAM AIR
MODELS SR22 AND SR22T
RAM AIR
CROSSOVER TUBE
RAM AIR
HOT AIR
VALVE
MIXING
CHAMBER
FRESH AIR
VALVE
AIR FLOW VALVE
CONTROL PANEL
SERVO MOTOR
WINDSHIELD
DIFFUSER
FLOOR AIRFLOW
DISTRIBUTION
MANIFOLD
PANEL AIRFLOW
AIR GASPER
FAN
ASSEMBLY
FOOT-WARMER
DIFFUSER
NOTE: Illustration depicts maximum
cabin cooling airflows and
selector settings.
Serials 22T-0001 & subs w/ Fan.
SR22_MM21_3248
Figure 21-005
Heating and Ventilation System - Serials 22T-0001 & subs w/ Fan (Sheet 2 of 3)
EFFECTIVITY:
Serials 22T-0001 & subs w/ Fan
21-00
Page 19
15 Dec 2014
CIRRUS
AIRPLANE MAINTENANCE MANUAL
RAM AIR
S
P
MODELS SR22 AND SR22T
RAM AIR
RAM AIR
CROSSOVER TUBE
HOT AIR
VALVE
MIXING
CHAMBER
COMPRESSOR
WINDSHIELD
DIFFUSER
FRESH AIR
VALVE
AIR FLOW VALVE
SERVO MOTOR
PANEL AIRFLOW
AIR GASPER
CONTROL PANEL
FLOOR AIRFLOW
DISTRIBUTION
MANIFOLD
S
P
FOOT-WARMER
DIFFUSER
EVAPORATOR
ASSEMBLY
RECIRCULATION
CHECK VALVE
NOTE: llustration depicts maximum cabin
cooling airflows and selector settings.
CONDENSER
ASSEMBLY
Serials 22T-0001 & subs w/ Air Conditioning.
SR22_MM21_3249
Figure 21-005
Heating and Ventilation System - Serials 22T-0001 & subs w/ Air Conditioning (Sheet 3 of 3)
21-00
Page 20
15 Dec 2014
EFFECTIVITY:
Serials 22T-0001 & subs w/ Air Conditioning