Piper SENECA III - Page 258

SECTION
9
PIPER AIRCRAFT CORPORATION
SUPPLEMENT 3
PA-34-220T,
SENECA IH
The
air
conditioning
system
is
a
recirculating
air
system.
The
major
components
include
an
evaporator,
condenser,
compressor,
blower,
switches
and
temperature
controls.
The
evaporator
is located behind the
rear
baggage
compartment.
This
cools the
air
used
for
the
air conditioning
system.
The
condenser
is
mounted
aft of
the
fire
wall
on
the
left
engine.
A
retractable condenser
scoop
extends
when
the
air conditioner is ON and
retracts to
a
flush
position
when
the
air
conditioner is OFF.
If
the
air
conditioner
is
operated
on
the
ground, the
condenser
scoop
operates
to
a
ground
opening
position
which
is
larger than the
in-flight
opening.
A
circuit
through
the
squat
switch
on
the
right
main
gear
prevents
the
scoop
from
operating
to
the
ground
opening
when
the aircraft is
in flight.
The
compressor
is mounted
on
the
rear
outboard
side of
the
left
engine.
It
has
an
electric
clutch
which
automatically
engages
or
disengages the
compressor.
Air
from
the
baggage
area
is
drawn through the
evaporator
by
the
blower
and
distributed through
an
overhead
duct
to
individual
outlets
located
adjacent
to
each
occupant.
The
switches and
temperature
control
are
located
on
the lower
right
side
of
the
instrument
panel. The
temperature
control
regulates
the
temperature
of
the
cabin.
Turning the
control
clockwise increases
cooling;
counterclock-
wise
decreases
cooling.
The
fan
speed
switch
and
the
air
conditioning
ON-OFF
switch.are
above
the
temperature
controL The
fan
can
be
operated
independently
of
the
air
conditioning: however,
the
fan
must
be
ON
for air
conditioner
operation.
Turning
either
switch
OFF
will
disengage the
compressor
clutch and
retract
the condenser
door.
Cooling
air
should
be
felt
within
one
minute after
the
air
conditioner
is
turned
on.
NOTE
If
the
system
is
not
operating
in 5
minutes,
turn
the
system
OFF
until
the
fault is corrected.
REPORT:
VB-1110
ISSUED:JANUARY 8,
1981
9-K
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