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Navigation Lights
The airplane is equipped with standard wing tip navigation lights. The
lights are controlled through the NAV light switch on the instrument
panel bolster. 28 VDC for navigation light operation is supplied through
the 5-amp NAV LIGHTS circuit breaker on Non-Essential Bus.
Strobe Light
Anti-collision strobe lights are installed integral with the standard
navigation lights. Each strobe is flashed by a separate power supply.
The strobe power supplies are controlled through the STROBE light
switch on the instrument panel bolster. 28 VDC for strobe light and
control circuits is supplied through the 5-amp STROBE LIGHTS circuit
breaker on Non-Essential Bus.
Landing Light
A High Intensity Discharge (HID) landing light is mounted in the lower
engine cowl. The landing light is controlled through the LAND light
switch on the instrument panel bolster.
Setting the LAND light switch 'ON' energizes the landing light control
relay in the Master Control Unit (MCU) completing a 28 VDC circuit
from the airplane Main Distribution Bus to the light's ballast located on
the firewall. The ballast provides boosted voltage to illuminate the HID
lamp. A 15-amp breaker on the Main Distribution Bus in the MCU
protects the circuit.
Interior Lighting
Interior lighting for the airplane consists of separately controlled
incandescent overhead lights for general cabin lighting, individual
lights for the pilots and passengers, and dimmable panel floodlights.
The flight instrumentation and avionics equipment lights are dimmable.
Revision A7
P/N 13772-001 7-75
Cirrus Design Section 7
SR22 Airplane Description
Instrument Lights
Instrument lighting for the airplane consists of dimmable incandescent
lights in the instrument bezels. The lights are controlled through the
INST lights control on the instrument panel bolster. Rotating the knob
clockwise energizes the lights and increases brightness. The
instrument light circuits operate on 28 VDC supplied through the 2-
amp INST LIGHTS circuit breaker on Main Bus 1.
Panel Flood Lights
A string of red LEDs mounted under the instrument panel glareshield
provide flood lighting for the instrument panel. The lights are controlled
through the PANEL lights control on the instrument panel bolster.
Rotating the knob clockwise energizes the lights and increases
brightness. The panel lights operate on 28 VDC supplied through the
3-amp CABIN LIGHTS circuit breaker on Main Bus 2.
Reading Lights
Individual eyeball-type reading lights are installed in the headliner
above each passenger position. Each light is aimed by positioning the
lens in the socket and is controlled by a push-button switch located
next to the light. The pilot and copilot reading lights are also dimmable
through the PANEL lights control on the instrument panel bolster. The
lights are powered by 28 VDC supplied through the 3-amp CABIN
LIGHTS circuit breaker on Main Bus 2.
Overhead Dome Light
General cabin lighting is provided by a dome light located in the
headliner at the approximate center of the cabin. The dome light is
controlled through the OVERHEAD light control on the instrument
panel bolster. Rotating the knob clockwise from the off position will
illuminate the light and control its intensity. The lights are powered by
28 VDC supplied through the 3-amp CABIN LIGHTS circuit breaker on
Main Bus 2.
Revision A7
7-76 P/N 13772-001
Section 7 Cirrus Design
Airplane Description SR22
Environmental System
Cabin heating and ventilation is accomplished by supplying
conditioned air for heating and windshield defrost and fresh air for
ventilation. The environmental system consists of a heater muff (heat
exchanger) around the right engine exhaust muffler, fresh air inlets(s),
hot air valve, distribution manifold, air ducting for distribution
windshield diffuser, vent outlets, and required actuators for selecting
temperature and flow. Serials 1602, 1821, 1840, 1863 & subsequent;
An optional 2-speed blower fan is available to supplement airflow when
ram air may be inadequate such as during ground operation.
Serials 1602, 1821, 1840, 1863 & subsequent; For the optional air
conditioning system, refer to the Air Conditioning System Pilot's
Operating Handbook Supplement, P/N 13772-127 original release or
later, for a complete description of the system, its operating modes,
and additional detailed operating procedures.
Description and Operation - Serials 0002 thru 1601,
1603 thru 1820, 1822 thru 1839, 1841 thru 1862*
Ventilation air is provided by ducting fresh air from air inlets, located in
　
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