PIPER
SENECA
II
SERVICE
MANUAL
NOTE
A very strong acid (HCL)
is
formed when R-12 comes in contact
with moisture.
A new receiver-dehydrator should be opened and connected to the
system only when ready
to
charge the system with refrigerant.
9. Recommended torque values must be used on
all
flare fitting and 0-ring joints. See
Table
XIV-XI.
TABLE
XIV-XI.
ALUMINUM
TUBING
TORQUE
Metal Tube
Thread and Fitting
Alum. Tubing
O.D.
Size
Torque
1/4
7/16
5-7
ft.-lbs.
3/8
5/8 11-13 ft.-lbs.
1/2
3/4
15-20 ft.-lbs.
5/8
7/8
21-27 ft.-lbs.
3/4
1-1/16
28-33 ft.-lbs.
14.98. SERVICE VAL YES. The purpose
of
the service valve
is
to service the air conditioning system.
(Testing, Bleeding, Evacuating and Charging). This aircraft
is
equipped with service valves mounted in the
suction and discharge lines
of
the evaporator assembly. These valves are the
"2"
position type Schrader
valves.
All
normal air conditioning service should be performed at the evaporator assembly mounted valves.
Reissued:
10/11/79
NOTE
Service valves are also located on the compressor. However, use
of
these valves in servicing is
not
recommended.
NOTE
If
a Schrader service valve
is
not
serviceable, the core assembly
must be replaced.
ACCESSORIES
AND UTILITIES
3D4
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