Cessna 172P - Page 235

PILOT'S
OPERATING HANDBOOK
SUPPLEMENT
4
CIR,CULATION
¡.AN
SYgTEM
MODEL
172P
SUPPLEMENT
CIRCULATION
FAN
SYSTEM
sEcTroN
I
GENERAL
The circulation
fan
system
provides
cabin
ventilation
during
ground
during
tal,
and
control
d Low,
MED, and HI,
providing
three
blower speeds.
System
electrical
protection
is
provided
by a õ-amp circuit
breaker,
labeled CIR FAN,
on the left
side
of
the
switch
and
control
panel.
Additional system components
(see
figure 1)
incLude
a circulation
fan
and motor located above the extended
baggage
compartment,
system
ducting,
and four futly
adjustable
outlets above
the cabin
side windows.
The circulation fan and motor includes an
electric
motor,
equipped
with
an
output shaft on each end, attached to squirrel-cage
type blowers
within
blower housings which
provide
airflow
through the
ducts
to the
cabin
outlets.
The volume of
airflow through the cabin outlets
is controlled
by
the
rotary knob
on
the control
pedestal;
adjustable louvers
on
each
outlet
control the direction
of airflow.
sEcfloN
2
LIMITATIONS
There is no
change to the
airplane
limitations
when
the circulation
fan
system is installed.
80 May 1980
lof.4