Special Servicing Procedures; System Servicing Precautions - Piper Dakota Maintenance Manual

SPECIAL SERVlCING PROCEDURES
Only trained personnel may service the air conditioning system.
All work must be done in a shop equipped for such work.
Wear eye protection when handling R-12 (Freon). If liquid Freon
contacts the eyes. DO NOT RUB THE EYES; splash cool water
into eyes; cover eye or eyes with clean patch; and seek medical
help at once.
If Freon contacts human skin, frostbite is possible. Seek medical
help at once.
Freon should not contact open flame or a hot surface, nor should
it be released into open air within a closed room.

SYSTEM SERVICING PRECAUTIONS

Discharge system slowly to prevent escape of liquid refrigerant
and loss of lubricating oil.
Do not leave system open to atmosphere when discharged or
introduce anything but pure refrigerant into system.
Keep refrigerant oil containers tightly sealed and clean to prevent
absorption of moisture or other contaminants.
Use only approved refrigeration oil in compressor. If any doubt
exists about cleanliness of oil, replace it with new oil. Never reuse
oil removed from system. Discard it.
When Locktite Refrigerant Sealant has been used on a joint, it
must be heated to 400° F prior to disassembly. Loctite must be
used to seal any pipe threads in system lines.
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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Reissued: August 1, 1986