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SR22 Supplements
System Operation
Serials before G3 Wing; Upon activation, a two-speed metering pump
supplies fluid pressure to the system. Low pump speed provides the
required flow during NORMAL operation and high pump speed during
MAXIMUM operation.
Serials with G3 Wing; Upon activation, the metering pump and a
priming pump, mounted below the LH passenger seat, energize
simultaneously. The priming pump pulls de-icing fluid from the tank,
through a series of strainers, through the metering pump, check valve
and back to the de-icing fluid tank. Within 10 seconds the metering
pump primes, begins circulating de-icing fluid through the system, and
the priming pump shuts off. Low pump speed provides the required
flow during NORMAL operation and high pump speed during
MAXIMUM operation.
All Serials; From the metering pump, mounted below the LH
passenger seat, de-icing fluid is pushed through a filter, mounted
adjacent to the pump, and then carried to the proportioning units
located in the wing (Serials before G3 Wing only), empennage, and
cabin-floor forward through plastic tubing. Proportioning units regulate
flow to the porous panels attached to the leading edges of the wing
and horizontal stabilizer and to the propeller slinger ring.
De-icing fluid is carried from the proportioning units to the porous
panels where the fluid is discharged at a low, steady flow rate through
fine, laser-drilled holes. De-icing fluid protects the propeller by a
slinger ring mounted to the spinner backing plate where the fluid is
distributed by centrifugal action onto grooved rubber boots fitted to the
root end of the propeller blades.
If icing is inadvertently encountered, the pilot switches the Ice
Protection switch to NORMAL or MAXIMUM to initiate de-icing fluid
flow along the protected surfaces. Pitot heat is turned ON and the time
is noted to aid in estimating de-icing fluid reserve. The pilot then
maneuvers to exit the icing conditions, turns cabin heat to maximum,
and windshield defrost and alternate induction air ON. Upon exiting
the icing conditions, the system is turned OFF.
Revision 07: 05-13-08
12 of 16 P/N 13772-115
Section 9 Cirrus Design
Supplements SR22
Figure - 2(Sheet 1 of 2)
SR22_FM09_1527
FINGER
STRAINER
FLUID
TANK
VENT DRAIN
POROUS PANEL
POROUS PANELS
PROPORTIONING
PROPORTIONING UNIT
UNIT
PROPORTIONING
UNIT
POROUS PANEL
POROUS PANELS
PROPORTIONING
UNIT
VENT
FITTING
METERING
PUMP
FILTER
SLINGER RING
System Schematic - Serials before G3 Wing
Revision 07: 05-13-08
P/N 13772-115 13 of 16
Cirrus Design Section 9
SR22 Supplements
PROPORTIONING
UNIT
STRAINER
TUBE
FILLER
NECK
FILTER
TEST
PORT
SLINGER
FLUID RING
TANK
OUTLET
STRAINER
VENT
POROUS
PANELS
PROPORTIONING
UNIT
POROUS PANELS
POROUS
PANELS
CHECK VALVE
DRAIN
VALVE
METERING
PUMP
PRIMING
PUMP
SR22_FM09_2591
Figure - 2(Sheet 1 of 2)
System Schematic - Serials with G3 Wing
Revision 07: 05-13-08
14 of 16 P/N 13772-115
Section 9 Cirrus Design
Supplements SR22
Section 8 – Handling, Service, & Maintenance
Storage
• Note •
During long periods of non-use, the porous panel membranes
may dry out which could cause uneven fluid flow during
subsequent operation. Perform the Pre-Flight Inspection every
30 days to keep porous panel membranes wetted.
To prepare the Ice Protection System for flyable storage, fill the deicing
fluid tank and operate the system on MAXIMUM to ensure all air
is completely purged from components and plumbing. Re-fill the deicing
fluid tank after purging.
Servicing
De-Icing Fluid Tank
• Caution •
Use only approved de-icing fluid. See Section 2, Limitations
The de-icing fluid tank is serviced through a filler located on the LH
side of the fuselage, just forward of the baggage door or Serials with
G3 Wing on the upper LH wing. To prevent de-icing fluid
contamination, maintain a clean, dedicated measuring container and
ensure mouth of fluid container is clean before dispensing. Secure the
filler cap immediately after filling.
Porous Panels
• Caution •
Certain solvents may damage the panel membrane. Use only
isopropyl alcohol, ethyl alcohol, or industrial methylated spirit
to clean panels.
Do not wax leading edge porous panels.
Periodically clean the porous panels with soap and water using a
　
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