Piper Cherokee Archer II Pilot Operating Handbook page 141

PIPER AIRCRAFT CORPORATION
PA-28-18I, CHEROKEE ARCHER 11
7.33 AIR CONDITIONING*
SECTION 7
DESCRIPTION AND OPERATION
The air conditioning system is a recirculating air system. The major items include: evaporat%,
condenser, compressor, blower, switches and temperature controls.
TI,e 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 on the bottom of the fuselage and to the rear
of the baggage compartment area. The scoop ex tends 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. It has an electric clutch
which automatically engages or disengages the compressor to the belt drive system of the compressor.
An electrical 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.
r
The switches and temperature control are located on the lower right side of the instrument panel in
the climate control center panel. The temperature control regulates the desired temperature of the cabin.
Tum the control clockwise for increased cooling, counterclockwise for decreased cooling.
Located inboard of the temperature control is the fan speed switch and the air conditioning
"ON-OFF" switch. The fan can be operated independently 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, tum 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 effect.'
( 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 tluottle is in the full bu,ottle 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 1/4 inch, the clutch will engage and the scoop will extend, again supplying cool,
dry air.
'Optional equipment
(
ISSUED: JUNE 18, 1976
REPORT: VB-790
7-23