Nissan Rogue. Manual - part 734

HA-4

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PRECAUTIONS

Procedure without Cowl Top Cover

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When performing the procedure after removing cowl top cover, cover

the lower end of windshield with urethane, etc. to prevent damage to

the windshield. 

Precautions For Refrigerant System Service

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GENERAL REFRIGERANT PRECAUTION

WARNING:

• Do not breathe A/C refrigerant and oil vapor or mist. Exposure may irritate eyes, nose and 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 work area before resuming service if accidental system discharge occurs.

Additional health and safety information may be obtained from refrigerant and oil manufacturers.

• Do not release refrigerant into the air. Use approved recovery/recycling recharging 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.

• Do not store or heat refrigerant containers above 52

°C (126°F).

• Do not 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.

• Do not intentionally drop, puncture or incinerate refrigerant containers.

• Do not 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.

• 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.

WORKING WITH HFC-134a (R-134a)

CAUTION:

• CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. Compressor mal-

function is likely to occur if the refrigerants are mixed, refer to “CONTAMINATED REFRIGERANT”

below. To determine the purity of HFC-134a (R-134a) in the vehicle and recovery tank, use Refriger-

ant recovery/recycling recharging equipment and Refrigerant Identifier.

• Use only specified oil for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) components.

Compressor malfunction is likely to occur if oil other than that specified is used.

• The specified HFC-134a (R-134a) oil rapidly absorbs moisture from the atmosphere. The following

handling precautions must be observed:

- Cap (seal) the component immediately to minimize the entry of moisture from the atmosphere when

removing refrigerant components from a vehicle.

- Do not remove the caps (unseal) until just before connecting the components when installing refrig-

erant components to a vehicle. Connect all refrigerant loop components as quickly as possible to

minimize the entry of moisture into system.

- Use only the specified oil from a sealed container. Reseal containers of oil immediately. Oil becomes

moisture saturated and should not be used without proper sealing.

- Do not allow oil to come in contact with styrene foam parts. Damage may result.

CONTAMINATED REFRIGERANT

PIIB3706J

PRECAUTIONS

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Take 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.

• In case of repairing, recover the refrigerant using only dedicated equipment and containers. Do not

recover contaminated refrigerant into the existing service equipment. Contact a local refrigerant prod-

uct retailer for available service if the facility does not have dedicated recovery equipment. This refrigerant

must be disposed of in accordance with all federal and local regulations. In addition, replacement of all

refrigerant system 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.

REFRIGERANT CONNECTION

A new type of refrigerant connection has been introduced to all refrigerant lines except the following locations:

• Expansion valve to evaporator

• Refrigerant pressure sensor to liquid tank

WARNING:

Check that all refrigerant is discharged into the recycling equipment and the pressure in the system is

less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it.

CAUTION:

Observe the following when replacing or cleaning refrigerant components.

• When the compressor is removed, store it in the same way as it is when mounted on the vehicle.

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

• Always use a torque wrench and a back-up wrench when connecting tubes.

• Plug immediately 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.

Do not remove the seal caps of pipes and other components until just before required for connec-

tion.

• 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.

• Remove moisture thoroughly from the refrigeration system before charging the refrigerant.

• Always replace used O-rings.

• Apply oil to the O-rings shown in illustrations when connecting tubes. Be careful not to apply oil to

threaded portion.

• O-ring must be closely attached to the groove portion of tube.

• Be careful not to 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 tube correctly.

HA-6

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PRECAUTIONS

• Perform leak test and make sure that there are no leaks from connections after connecting line. Dis-

connect that line and replace the O-ring when the refrigerant leaking point is found. Then tighten

connections of seal seat to the specified torque.

COMPRESSOR

CAUTION:

• Plug all openings to prevent moisture and foreign matter from entering.

• When the compressor is removed, store it in the same way as it is when mounted on the vehicle.

• Follow “Oil Adjusting Procedure for Compressor Replacement" exactly when replacing or repairing

compressor. Refer to 

HA-25, "Oil Adjusting Procedure for Compressor Replacement"

.

• Keep friction surfaces between clutch and pulley clean. Wipe them off by using a clean waste cloth

moistened with solvent if the surface is contaminated with oil.

• Turn the compressor shaft by hand more than five turns in both directions after compressor service

operation. This distributes oil equally inside the compressor. Let the engine idle and operate the

compressor for one hour after the compressor is installed.

• After replacing the compressor magnet clutch, apply voltage to the new one and check for normal

operation.

Service Equipment

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RECOVERY/RECYCLING RECHARGING EQUIPMENT

Be certain to follow the manufacturer’s instructions for machine operation and machine maintenance. Do not

introduce any refrigerant other than that specified into the machine.

ELECTRONIC LEAK DETECTOR

Be certain to follow the manufacturer’s instructions for detector operation and maintenance.

VACUUM PUMP

RHA861F

PRECAUTIONS

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The oil contained inside the vacuum pump is not compatible with the

specified oil for HFC-134a (R-134a) A/C systems. The vent side of

the vacuum pump is exposed to atmospheric pressure, so the vac-

uum pump oil may migrate out of the pump into the service hose.

This is possible when the pump is switched OFF after evacuation

(vacuuming) with 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:

• 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 no vacuum condition. Such valves may restrict the pump’s

ability to pull 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 oils.

SERVICE HOSES

Be certain that the service hoses display the markings described

(colored hose with black stripe). All hoses must be equipped with

positive shut-off devices (either manual or automatic) near the end of

the hoses opposite to the manifold gauge.

SERVICE COUPLERS

RHA270DA

SHA533D

RHA272D