SECTION
7
PIPER
DESCRIPTION
& OPERATION
AIRCRAFT CORPORATION
PA-28-r81, ARCHER tl
Locared
inboard of the
temperalure control
is
rhe fan speed switch and
the airconditioning ON-OFF
switch. The
fan
can be
operaled ind€pendently
ofthe airconditioning.
However,
it mus! be on forair conditioner operation.
'lurning
eilher
swilch off will
disengage the conpressor clurch and retract
the condenser
door. Coolingairshould
befehwilhin one minute aftertheair
conditioner
is turned
on.
r"OTE
Iflhe system is not
operating in 5 minutes, lurn
lhe systern OFF
until lhe fault
rs
correcled.
The FAN switch
ällows operalion ol
the fan with the air condilioner
rurned OFF to aid
cabin air circulalion
if desired. A LOW or HIGH flow of
air can
be
selected
lotheair
conduioner outlets localed
intheoverheadducl.
lhe ourlers
can be
ad.justed or lurned off by each
occupant
to regulate
individual
cooling
eftect.
Thc "DOOR
oPEN"
indicator light is localed to the left of the radio
stack
in iron! ofthe
pilot.
The
light illurninätes $henever rhe condenser door
is
open änd remains
on unlii the door
is
closed.
A
circuit breakef
locäted on lhe circui! b.eaker
panel protects
the
ai.
conditioning electrcal
systeln.
whenever the throttLe
is in the
fullthrotlle
posrrion.
it actuales a mrcro
switch
which disengages
lhe compressor
and retracts lhe scoop.
'fhis
is done
!o
obtain lnaximum
power
and
maximum rale of climb. The fan continues
ro operateänd
the air willremain
cool forapproximat€ly one minute.
When
the throttle
is retarded approximateLy
lr,{ inch. tbe clutch \'ill engäge
and
th€ scoop
llill exlend.
ägain supplying cool.
dr' air.
7.35 PIPf,R EXTERNAL
POWERT
An optionalslarting
inslallalion
known as Piper Ex!ernal Power
{PEP)
is accessible through
a receptacle
located on the righl side o{
the iLlselage alt
of the wing. An
exlernal
battery can be connecred to
the socket. thus
allowing
the operator to
crank lhe engine
wtthout haring to
garn
access
to
the äirplane\
baltery.
*Optional
equipment
REPORT:
vB-1120
7-22
ISSUED: JULY
2, 1979
REVISEDT Jt,LY
21, 1982