NISSAN TEANA 2014 Service Manual

PRECAUTIONSHA-5
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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 chance 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 contacti ng surface of the mating part to improve sealing charac-
teristics.
• The reaction force of the O-ring will not occur in the dire ction that causes the joint to pull out, thereby facili-
tating piping connections.
O-RING AND REFRIGERANT CONNECTION
CAUTION:
SHA815E
1. Low-pressure pipe 2. High-pressure pipe 3. High-pressure flexible hose
4. Condenser assembly 5. Compressor 6. Low-pressure flexible hose
7. Heating and cooling unit assembly Front
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HA-6
< PRECAUTION >
PRECAUTIONS
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 Specifications*
*: Always check with the Parts Department for the latest parts information.
WARNING:
Make sure all refrigerant is discharged into the recycling equipment and the pressure in the system is
less than atmospheric pressure. Then gradually loo sen the discharge side hose fitting and remove it.
CAUTION:
When replacing or cleaning refrigeran t cycle components, observe the following.
• When the compressor is removed, store it in the same position as it is when mounted on the car.
Failure to do so will cause oil to enter the low pressure chamber.
• When connecting tubes, always use a torque wrench and a back-up wrench.
• After disconnecting tubes, immedi ately plug all openings to prevent entry of dirt and moisture.
• When installing an air conditioner in the vehicle, connect the pipes as the final stage of the opera-
tion. Do not remove the seal caps of pipes and othe r components until just before required for con-
nection.
• 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 refrigerat ion system before charging the refrigerant.
• Do not reuse the O-rings.
• Apply A/C compressor oil to th e new O-rings for installation.
Oil name: NISSAN A/C System Oil Type S or equivalent
• O-ring must be closely attached to dented portion of tube.
• When replacing the O-ring, be careful not to damage O-ring and tube.
• Connect tube until you hear it cl ick, then tighten the nut or bolt by hand until snug. Make sure that
the O-ring is installed to tube correctly.
Connection
type O-ring
size D mm (in) W mm (in)
New 8 6.8 (0.268) 1.85 (0.0728)
Former 10 9.25 (0.3642) 1.78 (0.0701) New 1210.9 (0.429) 2.43 (0.0957)
Former 11.0 (0.433) 2.4 (0.094) New 1613.6 (0.535) 2.43 (0.0957)
Former 14.3 (0.563) 2.3 (0.091) New 1916.5 (0.650) 2.43 (0.0957)
Former 17.12 (0.6740) 1.78 (0.0701) New 24 21.8 (0.858) 2.4 (0.094)
SHA814E
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PRECAUTIONSHA-7
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• After connecting line, conduct leak test and make sure that there is no leakage from connections.
When the gas leaking point is f ound, disconnect that line and replace the O-ring. Then tighten con-
nections of seal seat to the specified torque.
Precaution for Service EquipmentINFOID:0000000009463914
RECOVERY/RECYCLING EQUIPMENT
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
Follow the manufacturer's instructions fo r tester operation and tester maintenance.
VACUUM PUMP
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 (vac-
uuming) and hose is connected to it.
To prevent this migration, use a manual valve situated near the
hose-to-pump connection, as follows.
• Usually vacuum pumps have a manual isolator valve as part of the
pump. Close this valve to isolate the service hose from the pump.
• For pumps without an isolator, use a hose equipped with a manual shut-off valve near the pump end. Close the valve to isolate the
hose from the pump.
• If the hose has an automatic shut off valve, disconnect the hose from the pump: as long as the hos e is connected, the valve is open
and oil may migrate.
Some one-way valves open when vacuum is applied and close
under a no vacuum condition. Such valves may restrict the pump's
ability to pull a deep vacuum and are not recommended.
MANIFOLD GAUGE SET
RHA861F
RHA270D
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HA-8
< PRECAUTION >
PRECAUTIONS
Be certain that the gauge face indicates R-134a or 134a. Make sure
the gauge set has 1/2 ″-16 ACME threaded connections for service
hoses. Confirm the set has been used only with refrigerant HFC-
134a (R-134a) along with specified oil.
SERVICE HOSES
Be certain that the service hoses display the markings described
(colored hose with black stripe). All hoses must include positive shut-
off devices (either manual or aut omatic) near the end of the hoses
opposite the manifold gauge.
SERVICE COUPLERS
Do not attempt to connect HFC-134a (R-134a) service couplers to a
CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will
not properly connect to the CFC-12 (R-12) system. However, if an
improper connection is attempted, discharging and contamination
may occur.
REFRIGERANT WEIGHT SCALE
Verify that no refrigerant other than HFC134a (R-134a) and specified
oils have been used with the scale. If the scale controls refrigerant
flow electronically, the hose fitting must be 1/2”-16 ACME.
CHARGING CYLINDER
Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder's top valve
when filling the cylinder with refrigerant. Also, the accu racy of the cylinder is generally less than that of an
electronic scale or of quality recycle/recharge equipment.
SHA533D
RHA272D
Shut-off valve rotati on A/C service valve
Clockwise Open
Counterclockwise Close
RHA273D
RHA274D
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PREPARATIONHA-9
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000009463915
The actual shapes of the tools may differ from those illustrated here.
HFC-134a (R-134a) Servic e Tool and EquipmentINFOID:0000000009463916
Do not mix HFC-134a (R-134a) refrigerant and/or its specif ied oil with CFC-12 (R-12) refrigerant and/or its oil.
Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/oil.
Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles
refrigerant and/or oil) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid mixed
use of the refrigerants/oil.
Adapters that convert one size fitting to another must not be used refrigerant/oil contamination will occur and
compressor failure will result.
Tool number
(TechMate No.)
Tool name Description
—
(J-41425-NIS)
Aluminum tube repair kit Repairing leaks in A/C tubes
—
(J-38873-A)
Drive plate installer Installing pulley
—
(J-46534)
Trim Tool Set Removing trim components
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WJIA0367E
AWJIA0483ZZ
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HA-10
< PREPARATION >
PREPARATION
Tool number
(TechMate No.)
Tool name Description
—
(—)
HFC-134a (R-134a) Refrigerant Container color: Light blue
Container marking: HFC-134a (R-
134a)
Fitting size: Thread size
• large container 1/2”-16 ACME
—
(—)
NISSAN A/C System Oil Type R Type: Poly alkylene glycol oil (PAG),
type R
Application: HFC-134a (R-134a) vane
rotary compressors (NISSAN only)
Lubricity: 40 m (1.4 US fl oz, 1.4 Imp
fl oz)
—
(J-48710)
NISSAN ACR2009 RRR Unit Refrigerant recovery, recycling and re-
charging
—
(J-41995)
Electronic refrigerant leak detector Power supply:
• DC 12V (batte ry terminal)
—
(J-43926)
Refrigerant dye leak detection kit
Kit includes:
(J-42220)
UV lamp and UV safety goggles
(J-41459)
Refrigerant dye injector
(J-41447)
Fluorescent leak detection dye
(box of 24, 1/4 ounce bottles)
(J-43872)
Refrigerant dye cleaner Power supply:
• DC 12V (batte ry terminal)
S-NT196
S-NT197
WJIA0293E
AHA281A
ZHA200H
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PREPARATIONHA-11
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Commercial Service ToolINFOID:0000000009463917
—
(J-39183-C)
Manifold gauge set (with hoses
and couplers) Identification:
• The gauge face indicates R-134a. Fitting size-Thread size
• 1/2”-16 ACME
Service hoses:
• High side hose (J-39500-72B)
• Low side hose (J-39500-72R)
• Utility hose
(J-39500-72Y) Hose color:
• Low side hose: Blue with black stripe
• High side hose: Red with black stripe
• Utility hose: Yellow with black stripe or green with black stripe
Hose fitting to gauge:
• 1/2”-16 ACME
Service couplers
• High side coupler (J-39500-20A)
• Low side coupler
(J-39500-24A) Hose fitting to service hose:
• M14 x 1.5 fitting is optional or perma- nently attached.
—
(J-39699)
Refrigerant weight scale For measuring of refrigerant
Fitting size-Thread size
• 1/2”-16 ACME
—
(J-39649)
Va c u u m p u m p
(Including the isolator valve) Capacity:
• Air displacement: 4 CFM
• Micron rating: 20 microns
• Oil capacity: 482 g (17 oz)
Fitting size-Thread size
• 1/2”-16 ACME
Tool number
(TechMate No.)
Tool name Description
RJIA0196E
S-NT201
S-NT202
S-NT200
S-NT203
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HA-12
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PREPARATION
(TechMate No.)
Tool name Description
(J-41810-NI)
Refrigerant identifier equipment (R-
134a) For checking refrigerant purity and
system contamination
(—)
Power tool Loosening nuts, screws and bolts
RJIA0197E
PIIB1407E
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REFRIGERATION SYSTEMHA-13
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SYSTEM DESCRIPTION
REFRIGERATION SYSTEM
Refrigerant CycleINFOID:0000000009463918
Refrigerant flow
Refrigerant Flow
The refrigerant from the compressor flows though the c ondenser with liquid tank, evaporator, and return to the
compressor. The refrigerant evaporation in the evaporator is controlled by an expansion valve.
Freeze Protection
To prevent evaporator from freezing up, the evaporator air temperature is monitored and the voltage signal to
the A/C auto amp. makes the A/C relay go OFF and stop the compressor.
Refrigerant System ProtectionINFOID:0000000009463919
Refrigerant pressure sensor
The refrigerant system is protected against excessively hi gh or low pressures by the refrigerant pressure sen-
sor, located on the condenser. If the system pressure rise s above or falls below the specifications, the refriger-
ant pressure sensor detects the pressure inside the refrigerant line and sends the voltage signal to the ECM.
The ECM then ceases to supply power to the A/C relay which disengages and stops the compressor when
pressure on the high pressure side (as detected by refr igerant pressure sensor) is over approximately 2,746
kPa (28 kg/cm
2, 398 psi), or below approximately 120 kPa (1.22 kg/cm2, 17.4 psi).
Pressure Relief Valve
1. Electric compressor 2. Pressure relief valve 3. Liquid tank
4. Refrigerant pressure sensor 5. Condenser 6. Expansion valve
7. Evaporator 8. Blower motor A. High-pressure gas
B. High-pressure liquid C. Low-pressure liquid D. Low-pressure gas
E. Suction port F. Discharge port G Outside air
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HA-14
< SYSTEM DESCRIPTION >
REFRIGERATION SYSTEM
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
When the pressure of refrigerant in the system increases to an abnormal level [more than 3,727 kPa (38 kg/
cm
2, 540 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into
the atmosphere.
Component Part LocationINFOID:0000000009463920
1. Low-pressure pipe 2. High-pressure pipe 3. High-pressure flexible hose
4. Condenser assembly 5. Compressor 6. Low-pressure flexible hose
7. Heating and cooling unit assembly Front
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