Piper CHEROKEE ARCHER II Pilot Operating Handbook page 133

PIPER AIRC RAFT
C
ORPORATION
PA.2&I8I,
CHEROKEE ARCHER
II
SECTION
7
DESC
RIPTION AND OPERATION
7.33
AIR CONDITIONING*
The
air
conditiontng system
is a
recirculating
air
system.
The major items include:
evaporator,
condenser, compressor.
blower. switches and temperature controls'
The evaporator is located behind the
left
rear side
of
the
baggage
compartment. This cools the air that
is used
for air conditioning.
The condenser is
mounted on
a
retractable scoop
located orr
the bottom of the
fuselage and
to the
rear
of
the
baggage
compartment area.
The scoop extends when the air conditioner is
"ON"
and retracts
to
a
flush position when the
system
is
"OFF."
The
compressor
is mounted on the forward right
underside
of
the
engine.
Ii
has
an electric clutch
which automatically
engages
or
disengages
the compressor to the belt drive system of the
compressor.
An
electricai blower is mounted on the
aft
side
of
the rear cabin panel.
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 in
the climate control center
panel.
The temperahrre control regulates
the
desired
temperature
of
the
cabin.
Turn the control
clockwise
for
increased
cooling, counterclockwise for
decreased cooling.
Located inboard
of
the
temperaturc
control
is
the fan
speed
switch and
the air
conditioning
"ON-OFF"
switch. The fan can be operated independenfly of the air conditioning. However,
it
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.
The
"FAN"
switch allows operation of the fan
with
the air conditioner turned
"OFF"
to aid cabin air
circulation
if
desired.
A "LOW," '.MED" or "HIGH" flow of air
can be selected
to
the air conditioner
outlets located in the
overhead
duct. The outlets can
be adjusted
or turned
off
by
each
occupant to regulate
individual cooling
e
ffect.
The "DOOR OPEN" indicator
light
is located
to
the
left of
the radio
stack
in front of the pilot.
The
light illuminates whenever the condenser
door
is
open and remains
on
until
the door is
closed.
A circuit breaker located
on the circuit breaker panel protects the air conditioning electrical
system.
Whenever
the throttle is
in
the
full
throttle position,
it
actuates a
micro switch which
disengages
the
compressor
and retracts the
scoop.
This is done
to
obtain maximum power and maximum rate
of
climb.
The fan continues
to
operate and
the air
will
remain cool
for
approximately one
minute.
When
the
throttle
is retarded approximately
ll4
inch, the clutch
will
engage
and the scoop
will
extend,
again
supplying cool,
dry
air.
rOptional equipment
REPORT: vB-790
7-23
ISSUED: JUNE 18, 1976