Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 715

CESSNA SECTION 9 - SUPPLEMENTS
MODEL 208B 867 SHP SUPPLEMENT 1
GARMIN G1000
AIRPLANE SYSTEMS AND DESCRIPTIONS
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TKS ICE PROTECTION SYSTEM OPERATION,
INDICATION AND MESSAGING
The TKS Ice Protection system is operated with three toggle switches.
These switches are located in the ANTI-ICE section of the lower left
pilot's instrument panel, refer to Figure S1-7. Control of the TKS Ice
Protection System, ice detection light, pitot/static, Low Airspeed
Awareness, and stall vane heat are included in this row of switches.
Primary control of the system is accomplished through three switches
labeled PRIMARY, MAX FLOW, and BACKUP. These switches activate
the primary modes of ice protection, including Normal (NORM) and
HIGH, Maximum (MAX FLOW AIRFRAME) and WINDSHIELD, and
BACKUP, refer to Detail A of Figure S1-7.
Normal mode is activated by selecting the NORM position (center) on
the PRIMARY mode switch. NORM mode is the lowest fluid flow rate of
the system. The flow rate is achieved by running both metering pumps
of the system on a continuous repeat cycle of operation. The two
pumps will run for approximately 20 seconds, then deactivate. After 100
seconds of inactivity, the pumps will again activate for the 20 second
operation period. This on-off cycle of operation will continue until OFF
is selected on the PRIMARY mode switch.
HIGH mode is activated by selecting HIGH (up) on the PRIMARY mode
switch. HIGH mode is achieved by running one metering pump
continuously. Like NORM mode, the HIGH mode may be terminated by
selecting OFF on the PRIMARY mode switch.
Maximum flow (MAX FLOW) mode is provided for combating heavy or
extreme icing conditions. For MAX FLOW mode to operate, the
PRIMARY switch must be in either NORM or HIGH. With either of these
modes operating, MAX FLOW mode may be activated by selecting the
AIRFRAME position (spring-loaded up) on the MAX FLOW switch. The
MAX FLOW switch is spring-loaded and will immediately return to the
center position.
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FAA APPROVED
208BPHCUS-S1-00 S1-63
U.S.