Infiniti FX35 / FX45. Manual - part 102

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PRECAUTIONS

Precaution for 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.

Precaution for Working with HFC-134a (R-134a)

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CAUTION:

• CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are not compatible. If the refrigerants

are mixed and compressor malfunction is likely to occur, 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 lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) compo-

nents. If lubricant other than that specified is used, compressor malfunction is likely to occur.

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

lowing handling precautions must be observed:

- When removing refrigerant components from a vehicle, immediately cap (seal) the component to

minimize the entry of moisture from the atmosphere.

- When installing refrigerant components to a vehicle, never remove the caps (unseal) until just before

connecting the components. Connect all refrigerant loop components as quickly as possible to min-
imize the entry of moisture into system.

- Only use the specified lubricant from a sealed container. Immediately reseal containers of lubricant.

Without proper sealing, lubricant will become moisture saturated and should not be used.

- Never allow lubricant (Nissan A/C System Oil Type S) to come in contact with styrene foam parts.

Damage may result.

CONTAMINATED REFRIGERANT

If a refrigerant other than pure HFC-134a (R-134a) is identified in a vehicle, take appropriate steps
shown below:
• 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. Never

recover contaminated refrigerant into the existing service equipment.   If the facility does not have ded-
icated recovery equipment, contact a local refrigerant product retailer for available service. 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.

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

tomer Affairs for further assistance.

General Refrigerant Precaution

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WARNING:

• Avoid breathing A/C refrigerant and lubricant 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
requirements of SAE J-2210 [HFC-134a (R-134a) recycling equipment], or J-2209 [HFC-134a (R-134a)
recovery equipment]. If accidental system discharge occurs, ventilate work area before resuming
service. Additional health and safety information may be obtained from refrigerant and lubricant
manufacturers.

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• Never 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.

• Never store or heat refrigerant containers above 52

°

C (126

°

F).

• Never 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.

• Never 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.

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

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 prop-
erty damage. Additional health and safety information may be obtained from refrigerant manufactur-
ers.

Precaution for Refrigerant Connection

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A new type refrigerant connection has been introduced to all refrigerant lines except the following location.
• Expansion valve to evaporator
• Refrigerant pressure sensor to condenser

ABOUT ONE-TOUCH JOINT

Description

• One-touch joints are pipe joints which do not require tools during piping connection.
• Unlike conventional connection methods using union nuts and flanges, controlling tightening torque at con-

nection point is not necessary.

• When removing a pipe joint, use a disconnector.
COMPONENT PARTS

FUNCTIONS OF COMPONENT PARTS

NOTE:

1

Pipe (Male-side)

• Retains O-rings.
• Retains garter spring in cage (A).

2

Garter spring

Anchors female-side piping.

3

Indicator ring

When connection is made properly, this is ejected from male-side piping. (This part is no longer nec-
essary after connection.)

4

O-ring

Seals connection point. (Not reusable)

5

Pipe (Female-side)

• Seals connection by compressing O-rings.
• Anchors piping connection using flare (B) and garter spring.

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PRECAUTIONS

• Garter spring cannot be removed from cage of male-side piping.
• Indicator ring remains near piping connection point, however, this is not a malfunction. (This is to check pip-

ing connection during factory assembly.)

REMOVAL

1.

Clean piping connection point, and set a disconnector.

2.

Slide disconnector in axial direction of piping, and stretch garter spring with tapered point of disconnector.

3.

Slide disconnector farther so that inside diameter of garter spring becomes larger than outside diameter of
female-side piping flare. Then male-side piping can be disconnected.

INSTALLATION

1.

Clean piping connection points, and insert male-side piping into female-side piping.

2.

Push inserted male-side piping harder so that female-side piping flare stretches garter spring.

3.

If inside diameter of garter spring becomes larger than outside diameter of female-side piping flare, garter
spring seats on flare. Then, it fits in between male-side piping cage and female-side piping flare to anchor
piping connection point.
NOTE:
When garter spring seats on flare, and fits in between male-side piping cage and female-side piping flare,
it clicks.

CAUTION:

• Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping

straight in axial direction.

• Insert piping securely until a click is heard.
• After piping connection is completed, pull male-side piping by hand to make sure that connec-

tion does not come loose.

NOTE:

One-touch joint connection is used in points below.

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• Low-pressure pipe 1 to low-pressure pipe 2 (O-ring size: 16)
• High-pressure pipe 1 to high-pressure pipe 2 (O-ring size: 8)
• High-pressure pipe 2 to high-pressure pipe 3 (O-ring size: 8)
• Low-pressure flexible hose to low-pressure pipe 1 (O-ring size: 16)
• Condenser to high-pressure flexible hose (O-ring size: 12)
• Condenser to high-pressure pipe 1 (O-ring size: 8)

FEATURES OF NEW TYPE REFRIGERANT CONNECTION

• The O-ring has been relocated. It has also been provided with a groove for proper installation. This elimi-

nates 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
characteristics.

• 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

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