Opel Frontera UBS. Manual - part 1854

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)

1B – 18 AIR CONDITIONING

CHARGING THE REFRIGERANT SYSTEM

There are various methods of charging refrigerant into the
air conditioning system.
These include using ACR

4

(HFC-134a Refrigerant

Recovery/ Recycling/ Recharging/ System) or equivalent
and direct charging with a manifold gauge charging
station.

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)

Charging procedure

•

ACR

4

(or equivalent) method

For the charging of refrigerant recovery by ACR

4

, follow

the manufacture’s instruction.

ACR

4

(Low side)

(High side)

HFC 134a

AIR CONDITIONING  1B – 19

•

Direct charging with a manifold gauge charging station
method

Handling the charging valve handle when installing
refrigerant container.
1)

Before attaching the charge valve to the refrigerant
container, turn the charge valve handle
counterclockwise until the needle is fully retracted.

2)

Turn the plate nut counterclockwise until it reaches its
highest position relative to the charge valve.

3)

Install the charge valve onto the refrigerant container.

4)

Turn the plate nut clockwise and connect the center
hose of the manifold gauge to the charge valve.

5)

Tighten the plate nut sufficiently by hand. Then turn
the charge valve handle clockwise to lower the needle
and bore a hole in the refrigerant container.

6)

Turn the charge valve handle counterclockwise to
raise the needle. The refrigerant in the refrigerant
container is charged into the air conditioning system
by the operation of the manifold gauge.

•

Be absolutely sure not to reuse the emptied
refrigerant container.

Charge valve handle

Plate nut

Needle

Connection

<Charge valve>

Refrigerant container

Charging hose

Manifold gauge

Vacuum pump

Refrigerant container

Charge valve handle

(Low side)

(High side)

1B – 20 AIR CONDITIONING

1)

Make sure the evacuation process is correctly
completed.

2)

Connect the center-hose of the manifold gauge to the
refrigerant container.

•

Turn the charge valve handle counterclockwise to
purge the charging line and purge any air existing
in the center-hose of the manifold gauge.

3)

Open the low-pressure hand valve and charge the
refrigerant about 200 g(0.44 lbs.).

•

Make sure the high-pressure hand valve is closed.

•

Avoid charging the refrigerant by turning the
refrigerant container upside down.

4)

Close the low-pressure hand valve of the manifold
gauge.

•

Check to ensure that the degree of  pressure does
not charge.

5)

Check the refrigerant leaks by using a HFC-134a leak
detector.

•

If a leak occurs, repair the leak connection, and
start all over again from the first step of
evacuation.

6)

If no leaks are found, open the low-pressure hand
valve of the manifold gauge.Then continue charging
refrigerant to the system.

•

When charging the system becomes difficult:
(1) Run the engine at Idling and close the all

vehicle doors.

(2) A/C switch is “ON”.
(3) Set the fan control knob (fan switch) to its

highest position.

WARNING

BE ABSOLUTELY SURE NOT TO OPEN THE HIGH-
PRESSURE HAND VALVE. SHOULD THE HIGH-
PRESSURE HAND VALVE BE OPENED, THE HIGH-
PRESSURE REFRIGERANT GAS WOULD FLOW
BACKWARD, AND THIS MAY CAUSE THE
REFRIGERANT CONTAINER TO BURST.

7)

When the refrigerant container is emptied, use the
following procedure to replace it with a new
refrigerant container.
(1) Close the low pressure hand valve.
(2) Raise the needle upward and remove the charge

valve.

(3) Reinstall the charge valve to the new refrigerant

container.

(4) Purge any air existing in the center hose of the

manifold gauge.