Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 330 / 1956

PAGE 12
Feb 28/07
2E4
21-50-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
(2) System Servicing Precautions.
WARNING: DISCHARGE SYSTEMS SLOWLY TO PREVENT THE ESCAPE OF LIQUID
REFRIGERANT AND THE LOSS OF THE LUBRICATING OIL.
NOTE: The term “Discharge,” as used throughout this section, in no sense implies or
suggests discharging refrigerant to atmosphere. In all cases when discharging, an
environmentally approved refrigerant recovery station is to be used.
WARNING: DO NOT LEAVE SYSTEMS OPEN TO THE ATMOSPHERE WHEN
DISCHARGED. MOISTURE AND OTHER CONTAMINATION MAY ENTER AND
DAMAGE OPEN SYSTEMS.
NOTE: A very strong acid (HCL) is formed when R-12 comes in contact with moisture. When
HFC-134a comes in contact with moisture it absorbs it into the system, which will lead
to system failure.
WARNING: USE ONLY APPROVED REFRIGERATION OIL IN THE COMPRESSOR:
-- MINERAL OIL FOR R12 SYSTEMS (S/N’S 4636001 THRU 4636186 ONLY) ;
AND,
-- POLYALKYLENE GLYCOL (PAG) FOR HFC-134a SYSTEMS (S/N’S 4636187
AND UP) .
IF ANY DOUBT EXISTS ABOUT THE CLEANLINESS OF THE COMPRESSOR
OIL, REPLACE IT WITH NEW OIL.
WARNING: NEVER INTRODUCE ANYTHING BUT PURE REFRIGERANT AND THE
APPROPRIATE REFRIGERANT OIL INTO A SYSTEM.
WARNING: KEEP REFRIGERANT OIL CONTAINERS TIGHTLY SEALED AND CLEAN TO
PREVENT ABSORPTION OF MOISTURE OR OTHER CONTAMINATION.
WARNING: NEVER REUSE OIL REMOVED FROM THE SYSTEM -- DISCARD IT.
CAUTION: WHEN LOCTITE 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 THE SYSTEM LINES.
CAUTION: REPLACE THE RECEIVER-DEHYDRATOR ASSEMBLY ON ANY SYSTEM
WHICH HAS BEEN OPERATING WITH A LEAK ALLOWING AIR TO ENTER
THE SYSTEM. IF A RECEIVER-DEHYDRATOR IS LEFT OPEN TO THE
ATMOSPHERE IT SHOULD BE REPLACED DUE TO THE LOSS OF
EFFECTIVENESS OF THE DRYING COMPOUND IT CONTAINS.
CAUTION: A NEW RECEIVER-DEHYDRATOR SHOULD BE OPENED AND CONNECTED
TO THE SYSTEM ONLY WHEN READY TO CHARGE THE SYSTEM WITH
REFRIGERANT.
CAUTION: RECOMMENDED TORQUE VALUES MUST BE USED ON ALL FLARE FITTING
AND O-RING JOINTS. SEE CHART 3.
CAUTION: IF AIR CONDITIONING REFRIGERANT LINES OR SYSTEM IS OPENED,
LINES AND FITTINGS MUST BE CAPPED AND SEALED IMMEDIATELY TO
PREVENT DIRT AND OTHER CONTAMINANTS FROM ENTERING THE
SYSTEM. (DO NOT PUT A PLUG INTO THE HOSES OR FITTINGS.)
CAUTION: UNITED STATES ENVIRONMENTAL REGULATIONS PROHIBIT THE RELEASE
OF REFRIGERANT INTO THE ATMOSPHERE. SPECIAL EQUIPMENT IS
REQUIRED WHEN TESTING, DISCHARGING, OR CHARGING THE SYSTEM.