Opel Frontera UBS. Manual - part 905

 

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Opel Frontera UBS. Manual - part 905

 

 

1B – 14 AIR CONDITIONING

REPAIR OF REFRIGERANT LEAKS

Refrigerant Line Connections
Install new O-rings, if required. When disconnecting or
connecting lines, use two wrenches to prevent the
connecting portion from twisting or becoming damaged.

When connecting the refrigerant line at the block joint,
securely insert the projecting portion of the joint portion
into the connecting hole on the unit side and secure with a
bolt.

O-ring

Block joint

Apply specified compressor oil to the O-rings prior to
connecting.

CAUTION:

Compressor (PAG) oil to be used varies according to
compressor model. Be sure to apply oil specified for the
model of compressor.

O-rings must be closely aligned with raised portion of
refrigerant line.

Correct

Incorrect

Incorrect

×

×

1

Insert nut into union. First tighten nut by hand as much as
possible. Then, tighten nut to specified torque.

(Refer to “SERVICE INFORMATION” for Fixing Torque in
section 00)

1

2

852RY00014

852RY00015

852RY00016

AIR CONDITIONING  1B – 15

COMPRESSOR LEAKS

If leaks are located around the compressor shaft seal or
shell, replace or repair the compressor.

RECOVERY, RECYCLING, EVACUATION AND
CHARGING

Handling Refrigerant-134a (HFC-134a)
Air conditioning systems contain HFC-134a.
This is a chemical  mixture which requires special
handling procedures to avoid personal injury.

Always wear safety goggles and protective gloves.

Always work in a well-ventilated area. Do not weld or
steam clean on or near any vehicle-installed air
conditioning lines or components.

If HFC-134a should come in contact with any part of
the body, flush the exposed area with cold water and
immediately seek medical help.

If it is necessary to transport or carry any container of
HFC-134a in a vehicle, do not carry it in the passenger
compartment.

If it is necessary to fill a small HFC-134a container
from a large one, never fill the container completely.
Space should always be allowed above the liquid for
expansion.

Keep HFC-134a containers stored below 40 °C (104°F).

LEAK AT REFRIGERANT LINE CONNECTIONS

1)

Check the torque on the refrigerant line fitting and, if
too loose, tighten to the specified torque.

Use two wrenches to prevent twisting and damage
to the Line.

Do not over tighten.

2)

Perform a leak test on the refrigerant line fitting.

3)

If the leak is still present, discharge and recover the
refrigerant from the system.

4)

Replace the O-rings.

O-rings cannot be reused.  Always replace with
new ones.

Be sure to apply specified compressor oil to the
new O-rings.

5)

Retighten the refrigerant line fitting to the specified
torque.

Use two wrenches to prevent twisting and damage
to the line.

6)

Evacuate, charge and retest the system.

LEAK IN THE HOSE
If the compressor inlet or outlet hose is leaking, the entire
hose must be replaced. Refrigerant hose must not be cut
or spliced for repair.
1)

Locate the leak.

2)

Discharge and recover the refrigerant.

3)

Remove the hose assembly.

Cap the open connections at once.

4)

Connect the new hose assembly.

Use two wrenches to prevent twisting or damage
to the hose fitting.

Tighten the hose fitting to the specified torque.

5)

Evacuate, charge and test the system.

1B – 16 AIR CONDITIONING

WARNING

SHOULD HFC-134a CONTACT YOUR EYE(S),
CONSULT A DOCTOR IMMEDIATELY.

DO NOT RUB THE AFFECTED EYE(S). INSTEAD,
SPLASH QUANTITIES OF FRESH COLD WATER
OVER THE AFFECTED AREA TO GRADUALLY
RAISE THE TEMPERATURE OF THE
REFRIGERANT ABOVE THE FREEZING POINT.

OBTAIN PROPER MEDICAL TREATMENT AS
SOON AS POSSIBLE. SHOULD THE HFC-134a
TOUCH THE SKIN, THE INJURY MUST BE
TREATED THE SAME AS SKIN WHICH HAS
BEEN FROSTBITTEN OR FROZEN.

REFRIGERANT RECOVERY

The refrigerant must be discharged and recovered by
using ACR

4

(HFC-134a Refrigerant Recovery/ Recycling/

Recharging/ System) or equivalent before removing or
mounting air conditioning parts.

ACR

4

(115V  60Hz) : 5-8840-0629-0 (J-39500-A)

ACR

4

(220-240V  50/60Hz) 

: 5-8840-0630-0 (J-39500-220A)

ACR

4

(220-240V  50/60Hz Australian model) 

: 5-8840-0631-0 (J-39500-220ANZ)

1)

Connect the high and low charging hoses of the ACR

4

(or equivalent) as shown

2)

Recover the refrigerant by following the ACR

4

Manufacture’s Instructions.

3)

When a part is removed, put a cap or a plug on the
connecting portion so that dust, dirt or moisture
cannot get into it.

ACR

4

(Low side)

(High side)

HFC 134a

REFRIGERANT RECYCLING
Recycle the refrigerant recovered by ACR

4

or equivalent.

For the details of the actual operation, follow the steps in
the ACR

4

Manufacture’s Instructions.

ACR

4

(115V  60Hz) : 5-8840-0629-0 (J-39500-A)

ACR

4

(220-240V  50/60Hz) 

: 5-8840-0630-0 (J-39500-220A)

ACR

4

(220-240V  50/60Hz Australian model) 

: 5-8840-0631-0 (J-39500-220ANZ)

AIR CONDITIONING  1B – 17

7)

Check to ensure that the pressure does not change
after 10 minutes or more.

If the pressure changes, check the system for leaks.

If leaks occur, retighten the refrigerant line
connections and repeat the evacuation steps.

8)

If no leaks are found, again operate the vacuum
pump for 20 minutes or more, After confirming that
the gauge manifold pressure is at 750 mmHg(30
inHg), close both hand valves.

9)

Close positive shutoff valve.
Stop the vacuum pump and disconnect the center
hose from the vacuum pump.

Air and moisture in the refrigerant will cause problems in
the air conditioning system.
Therefore, before charging the refrigerant, be sure to
evacuate air and moisture thoroughly from the system.
1)

Connect the gauge manifold.

High-pressure valve (HI) – Discharge-side

Low-pressure valve (LOW) – Suction-side

2)

Discharge and recover the refrigerant.

3)

Connect the center hose of the gauge manifold set to
the vacuum pump inlet.

4)

Operate the vacuum pump, open shutoff valve and
then open both hand valves.

5)

When the low-pressure gauge indicates approx. 750
mmHg (30 inHg), continue the evacuation for 5
minutes or more.

6)

Close both hand valves and stop the vacuum pump.

EVACUATION OF THE REFRIGERANT SYSTEM

NOTE:
Explained below is a method using a vacuum pump. Refer
to ACR

4

(or equivalent) manufacture’s instructions when

evacuating the system with ACR

4

(or equivalent)

(Low side)

(High side)

 

 

 

 

 

 

 

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