Piper Lance II User Manual

LANCE
II SERVICE
MANUAL
14-17. ADDITION OF PARTIAL CHARGE
TO SYSTEM. It is possible to
top off this
system with refrigerant
by the following
method.
a. Remove
the access panel
at the rear of the cabin.
b. Connect
a charging hose to a refrigerant cylinder
and also to the Schrader valve
fitting on the suction
line. (Refer to
Figure 14-8.)
c. Purge the charging hose
by allowing a small amount of refrigerant
gas to escape at
the Schrader valve fitting.
d.
Start the engine and operate at 1000
RPM and turn the air conditioner on
maximum
cool.
e. Remove the plastic
plug from the sight glass in the
top of the receiver-dehydrator.
f. With a low refrigerant charge
in the system, bubbles will be seen
passing thru the
sight glass when
the system is operating.
g. Open the valve
on the refrigerant
cylinder.
h. Allow refrigerant
to flow into the system until
the bubbles disappear from the sight
glass.
i. Close the refrigerant valve and check to see that the sight glass remains clear during
system operation.
j. When the sight glass
stays clear of bubbles, add an
additional 1/4 pound of
refrigerant to the system.
(Engine should be operating
at 1000 RPM.)
NOTE
This should be done
with OAT at 70
°
F, or
higher, with the
air conditioner operating.
k. Shut off the air conditioner and engine. Remove the charging hose from the
Schrader valve with care due to refrigerant remaining in the line.
I. Replace
the access
panels.
14-18. COMPRESSOR SERVICE. It is not advisable to service the compressor in the field.
It should be done by a qualified shop which has the special equipment and trained personnel
required to properly
service the
unit.
Maintenance to this unit and its related components is limited to the replacement of
worn
drive belt and magnetic clutch. Any
other service requires removal of the
compressor
from the system.
NOTE
An important
factor in air
conditioning servicing
is
cleanliness and care should
be exercised to prevent
dirt or
foreign material from entering the system. All hose and
tubing ends should be capped immediately. Any lubrication
required in the assembly
of the components
should be
refrigerant oil of the type used in the compressor.

Piper Lance II Specifications

General

Manufacturer	Piper Aircraft
Max Takeoff Weight	3, 600 lb (1, 633 kg)
Crew	1
Horsepower	300 hp
Seats	6
Length	27 ft 7 in (8.41 m)
Capacity	5 passengers