Nissan Murano. Manual - part 1430

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PRECAUTIONS

CONTAMINATED REFRIGERANT

Take the appropriate steps shown below if a refrigerant other than pure HFC-134a (R-134a) is identified
in a vehicle:
• Explain to the customer that environmental regulations prohibit the release of contaminated refrigerant into

the atmosphere.

• Explain that recovery of the contaminated refrigerant could damage service equipment and refrigerant sup-

ply.

• Suggest the customer return the vehicle to the location of previous service where the contamination may

have occurred.

• If repairing, recover the refrigerant using only dedicated equipment and containers. Never reintroduce

contaminated refrigerant into the existing service equipment. Contact a local refrigerant product retailer
for available service if the facility does not have dedicated recovery equipment. This refrigerant must be dis-
posed of in accordance with all federal and local regulations. In addition, replacement of all refrigerant sys-
tem components on the vehicle is recommended.

• The air conditioner warranty is void if the vehicle is within the warranty period. Please contact Nissan Cus-

tomer Affairs for further assistance.

General Refrigerant Precaution

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WARNING:

• Never breathe A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose or throat.

Remove HFC-134a (R-134a) from the A/C system, using certified service equipment meeting require-
ments of SAE J-2210 [HFC-134a (R-134a) recycling equipment], or J-2209 [HFC-134a (R-134a) recov-
ery equipment]. Ventilate the work area before resuming service if accidental system discharge
occurs. Additional health and safety information may be obtained from refrigerant and lubricant
manufacturers.

• Never release refrigerant into the air. Use approved recovery/recycling equipment to capture the

refrigerant each 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.

• Never store or heat refrigerant containers above 52

°

C (126

°

F).

• Never heat a refrigerant container with an open flame. Place the bottom of the container in a warm

pail of water if container warming is required.

• Never intentionally drop, puncture, or incinerate refrigerant containers.
• Keep refrigerant away from open flames. Poisonous gas is produced if refrigerant burns.
• Refrigerant displaces oxygen, therefore be certain to work in well ventilated areas to prevent suffo-

cation.

• Never pressure test or leakage test HFC-134a (R-134a) service equipment and/or vehicle air condi-

tioning systems with compressed air during repair. Some mixtures of air and HFC-134a (R-134a)
have proven 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.

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 evaporator
• Refrigerant pressure sensor to liquid tank

O-RING AND REFRIGERANT CONNECTION

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CAUTION:

The new and former refrigerant connections use different O-ring configurations. Never confuse O-
rings since they are not interchangeable. Refrigerant may leak at the connection if an incorrect O-ring
is installed.

O-Ring Part Numbers and Specifications

F.

Former type refrigerant connection

N.

New type refrigerant connection

: O-ring size

JPIIA0453ZZ

Connection type

Piping connection point

Part number

QTY

O-ring size

New

Low-pressure flexible hose to low-pressure pipe

92474 N8210

1

φ

19

High-pressure pipe to condenser pipe assembly (Outlet)

92471 N8210

1

φ

8

Condenser pipe assembly (Inlet) to high-pressure flexible 
hose (One-touch joint)

92472 N8210

1

φ

12

Condenser assembly to condenser pipe as-
sembly

Inlet

92472 N8210

1

φ

12

Outlet

92471 N8210

1

φ

8

Low-pressure pipe to expansion valve

92473 N8210

1

φ

16

High-pressure pipe to expansion valve

92471 N8210

1

φ

8

Compressor to low-pressure flexible hose

92474 N8210

1

φ

19

Compressor to high-pressure flexible hose

92472 N8210

1

φ

12

Liquid tank to condenser assembly

Inlet

92471 N8210

1

φ

8

Outlet

1

Former

Refrigerant pressure sensor to liquid tank

J2476 89956

1

φ

10

Expansion valve to evaporator pipe assembly

Inlet

92475 71L00

1

φ

12

Outlet

92475 72L00

1

φ

16

Evaporator to evaporator pipe assembly

Inlet

92475 71L00

1

φ

12

Outlet

92475 72L00

1

φ

16

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PRECAUTIONS

WARNING:

Check that all refrigerant is discharged into the recycling equipment and the pressure in the system is
less than the atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove
it.

CAUTION:

Observe the following items when replacing or cleaning refrigerant cycle components.
• Store it in the same way as it is when mounted on the car when the compressor is removed. Failure

to do so will cause lubricant to enter the low-pressure chamber.

• Always use a torque wrench and a back-up wrench when connecting tubes.
• Immediately plug all openings to prevent entry of dust and moisture after disconnecting tubes.
• Connect the pipes at the final stage of the operation when installing an air conditioner in the vehicle.

Never remove the seal caps of pipes and other components until just before they are required for
connection.

• Allow components stored in cool areas to warm to working area temperature before removing seal

caps. This prevents condensation from forming inside A/C components.

• Thoroughly remove moisture from the refrigeration system before charging the refrigerant.
• Always replace used O-rings.
• Apply lubricant to the circle of the O-rings shown in illustration when a connecting tube. Never apply

lubricant to threaded portion.

• O-ring must be closely attached to the groove portion of tube.
• Never damage O-ring and tube when replacing the O-ring.
• Connect tube until a click can be heard. Then tighten the nut or bolt by hand. Check that the O-ring is

installed to the tube correctly.

• Perform leakage test and check that there is no leakage from connections after connecting the line.

Disconnect the line and replace the O-ring when the refrigerant leakage point is found. Then tighten
the connections of seal seat to the specified torque.

Service Equipment

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RECOVERY/RECYCLING EQUIPMENT

Be certain to follow the manufacturer instructions for machine operation and machine maintenance. Never
introduce any refrigerant other than that specified into the machine.

ELECTRICAL LEAK DETECTOR

Be certain to follow the manufacturer instructions for tester operation and tester maintenance.

VACUUM PUMP

Name

: A/C System Oil Type S

RHA861F

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The lubricant contained inside the vacuum pump is not compatible
with the specified lubricant for HFC-134a (R-134a) A/C systems.
The vent side of the vacuum pump is exposed to atmospheric pres-
sure. So the vacuum pump lubricant may migrate out of the pump
into the service hose. This is possible when the pump is switched
OFF after evacuation (vacuuming) and the hose is connected to it.
To prevent this migration, use a manual valve placed near the hose-
to-pump connection, as per the following procedure.
• Vacuum pumps usually have a manual isolator valve as part of the

pump. Close this valve to isolate the service hose from the pump.

• Use a hose equipped with a manual shut-off valve near the pump

end for pumps without an isolator. Close the valve to isolate the
hose from the pump.

• Disconnect the hose from the pump if the hose has an automatic

shut-off valve. As long as the hose is connected, the valve is open
and lubricating oil may migrate.

Some one-way valves open when vacuum is applied and close
under the no vacuum condition. Such valves may restrict the ability
of the pump to create a deep vacuum and are not recommended.

MANIFOLD GAUGE SET

Be certain that the gauge face indicates HFC-134a or R-134a. Be
sure the gauge set has 1/2

″

-16 ACME threaded connections for ser-

vice hoses. Confirm the set has been used only with refrigerant
HFC-134a (R-134a) and specified lubricants.

SERVICE HOSES

Be certain that the service hoses display the markings described
(colored hose with a black stripe). All hoses must equip positive
shut-off devices (either manual or automatic) near the end of the
hoses opposite to the manifold gauge.

SERVICE COUPLERS

RHA270DA

SHA533D

RHA272D