Piper Cherokee Six - Page 664

PIPER
CHEROKEE SIX
SERVICE MANUAL
SECTION
XII
CABIN
HEATER
AND
VENTILATOR
SYSTEM
12-1. GENERAL.
12-2.
DESCRIPTION.
Heat
for
the cabin
of
the Cherokee
Six
is provided
by a
hot air
heater
installed
on
the
exhaust
manifold.
Fresh
air
enters
the
engine
compartment
through
the
nose
cowling.
passes
to
the heater
muff
through
a flexible
hose
located
on the
left
front
of the
engine.
The
air is
then
heated
and vented
into the
cabin
area
through
a valve
which
can
be controlled
from
the
instrument
panel.
When
the valve
is
completely
closed
off,
the
heated
air
is vented
back
into the
engine
compartment.
The
heater
outlets
in the
cabin
are
located
between
each
set
of seats.
Control
for
the
heater
system
is
located
on
the
right
panel,
below
the
instruments.
The
windshield
is
kept
clear
of frost,
ice,
etc.,
by
a defroster
system
which
operates
from
the
heater
muff,
but has
an
individual
control.
Fresh
air
for
the
cabin
interior
is
picked
up
from
air
inlets
in the
leading
edge
of each
wing
at
the
intersection
of the
tapered
and
straight
section
and passed
to outlets
located
beside
the
front
and
center
set of
seats.
In addition,
an
air scoop
located
on
top
of the
fuselage
or
in the
leading
edge
of
the
fin on
1971
Models
directs
air to
individual
overhead
vents.
12-3.
HEATER
MAINTENANCE.
If the
exhaust
manifold
should
become
defective.
carbon
monoxide
fumes
may
be discharged
into
the cabin
area,
therefore,
it is
imperative
that
the
exhaust
manifold
be
inspected
regularly.
The
heater
muff
must
be removed
in order
to
inspect
the
manifold
assembly.
Check
the
operation
of the
push-pull
controls
to insure
the
valve
doors
function
properly.
When
the
controls
are
pulled
out,
the door
should
be
completely
open
to
permit
full
airflow.
When
the
controls
are
pushed
in,
the
valves
should
close
off
all
air passage
and
vent
the air
into
the
engine
compartment.
Refer
to Figure
12-1
or
12-2
for an
illustration
of
the
heater
system.
CABIN HEATER AND VENTILATOR SYSTEM
Revised:
8/14/73
3F22