Infiniti QX56 (JA60). Manual — part 575
PRECAUTIONS
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General Refrigerant Precaution
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WARNING:
• Do not release refrigerant into the air. Use approved recovery/recycling equipment to capture the
refrigerant every time an air conditioning system is discharged.
• Always wear eye and hand protection (goggles and gloves) when working with any refrigerant or air
conditioning system.
• Do not store or heat refrigerant containers above 52
°C (125°F).
• Do not heat a refrigerant container with an open flame; if container warming is required, place the
bottom of the container in a warm pail of water.
• Do not intentionally drop, puncture, or incinerate refrigerant containers.
• Keep refrigerant away from open flames: poisonous gas will be produced if refrigerant burns.
• Refrigerant will displace oxygen, therefore be certain to work in well ventilated areas to prevent suf-
focation.
• Do not pressure test or leak test HFC-134a (R-134a) service equipment and/or vehicle air condition-
ing systems with compressed air during repair. Some mixtures of air and HFC-134a (R-134a) have
been shown to be combustible at elevated pressures. These mixtures, if ignited, may cause injury or
property damage. Additional health and safety information may be obtained from refrigerant manu-
facturers.
Precaution for Leak Detection Dye
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• The A/C system contains a fluorescent leak detection dye used for locating refrigerant leaks. An ultraviolet
(UV) lamp is required to illuminate the dye when inspecting for leaks.
• Always wear fluorescence enhancing UV safety goggles to protect your eyes and enhance the visibility of
the fluorescent dye.
• The fluorescent dye leak detector is not a replacement for an electronic refrigerant leak detector. The fluo-
rescent dye leak detector should be used in conjunction with an electronic refrigerant leak detector (J-
41995).
• For your safety and the customer's satisfaction, read and follow all manufacturer's operating instructions and
precautions prior to performing work.
• A compressor shaft seal should not be repaired because of dye seepage. The compressor shaft seal should
only be repaired after confirming the leak with an electronic refrigerant leak detector (J-41995).
• Always remove any dye from the leak area after repairs are complete to avoid a misdiagnosis during a future
service.
• Do not allow dye to come into contact with painted body panels or interior components. If dye is spilled,
clean immediately with the approved dye cleaner. Fluorescent dye left on a surface for an extended period of
time cannot be removed.
• Do not spray the fluorescent dye cleaning agent on hot surfaces (engine exhaust manifold, etc.).
• Do not use more than one refrigerant dye bottle (1/4 ounce / 7.4 cc) per A/C system.
• Leak detection dyes for HFC-134a (R-134a) and CFC-12 (R-12) A/C systems are different. Do not use HFC-
134a (R-134a) leak detection dye in CFC-12 (R-12) A/C systems or CFC-12 (R-12) leak detection dye in
HFC-134a (R-134a) A/C systems or A/C system damage may result.
• The fluorescent properties of the dye will remain for over three (3) years unless a compressor failure occurs.
A/C Identification Label
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Vehicles with factory installed fluorescent dye have this identification label on the underside of hood.
Precaution for Refrigerant Connection
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A new type refrigerant connection has been introduced to all refrigerant lines except the following locations.
• Expansion valve to cooling unit
• Evaporator pipes to evaporator (inside cooling unit)
• Refrigerant pressure sensor
FEATURES OF NEW TYPE REFRIGERANT CONNECTION
• The O-ring has been relocated. It has also been provided with a groove for proper installation. This reduces
the possibility of the O-ring being caught in, or damaged by, the mating part. The sealing direction of the O-
ring is now set vertically in relation to the contacting surface of the mating part to improve sealing character-
istics.
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PRECAUTIONS
• The reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby facili-
tating piping connections.
O-RING AND REFRIGERANT CONNECTION
SHA815E
PRECAUTIONS
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Front A/C
WJIA1578E
1.
High-pressure service valve
2.
Grommet
3.
High-pressure pipe
4.
Refrigerant pressure sensor
5.
Condenser
6.
Compressor shaft seal
7.
High-pressure flexible hose
8.
Low-pressure flexible hose
9.
Low-pressure service valve
10. Low-pressure pipe
11. Expansion valve (front)
12. Drain hose
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PRECAUTIONS
Rear A/C
CAUTION:
The new and former refrigerant connections use different O-ring configurations. Do not confuse O-
rings since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at or
around the connection.
O-Ring Part Numbers and Specifications
AWIIA0134GB
1.
Rear heater and cooling unit assembly 2.
Rear A/C pipes
3.
Rear A/C heater core pipes
4.
Rear heater core hose
5.
Rear blower motor
6.
Underfloor rear A/C pipes
7.
Underfloor rear heater core pipes
A.
Bolt torque specification
B.
Leak checking order (l - r)
C.
Tightening torque
D.
Wrench size
E.
O-ring size
Front
NOTE: The O-ring size 8 is the high-side and the O-ring size 16 is the low-side.
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