Opel Frontera UBS. Manual - part 34

AIR CONDITIONING  1B – 21

8)

Charge the system to the specified amount and then
close the low-pressure hand valve.

Refrigerant Amount

g(lbs.)

750 (1.65)

DELPH1HD6/HT6

g(lbs.)

600 (1.32)

•

A fully charged system is indicated by the sight
glass on the receiver/driver being free of any.
bubbles(Refer to “Reading Sight Glass”).

•

Check the high and low pressure value of the
manifold gauge.

•

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

Immediately after charging refrigerant, both high and low
pressures are slightly high and to the left of the gauge, but
they settle down to the guide pressure valves as shown
below:

•

Ambient temperature; 25 

∼

30°C (77 

∼

86°F)

•

Guide pressure
High-pressure side;
Approx. 1373 – 1863 kPa (14 – 19 kg·cm

2

/ 199 – 270 PSI)

Low-pressure side;
Approx. 147 – 294 kPa (1.4 – 3.0 kg·cm

2

/ 21 – 43 PSI)

9)

Close the low pressure hand valve and charge valve
of the refrigerant container.

10) Stop the air conditioning and the engine.
11) Disconnect the high and low pressure hoses from the

manifold gauge fittings.

1B – 22 AIR CONDITIONING

Almost transparent.
A flow of bubbles
can be seen, but
they disappear
when the throttle is
opened.

The sight glass provides accurate diagnosis only under the following conditions.
If the vehicle can be tested under these conditions, check the sight glass appearance and compare to the
chart.
*

Engine speed Idling

*

A/C switch “ON”

*

Blower fan operating at highest speed

*

Air source selector lever at “RECIRC”

*

Temperature control knob at coldest position

*

Ambient temperature below 30°C (86°F) and humidity below 70% (See NOTE 1)

*

High side pressure less than 1863 kPa (19 kg·cm

2

/ 270 PSI) (See NOTE 2)

NOTE 1

If the vehicle cannot be moved to a testing location that meets these specifications, then the sight glass
cannot be used for diagnosis. You must discharge and recover the refrigerant, then recharge the system
with the specified amount of refrigerant. Then continue checking the system performance.

NOTE 2

If the high side pressure is greater than stated, the sight glass cannot be used for diagnosis. You must
discharge and recover the refrigerant, then recharge the system with the specified amount of refrigerant.
Then continue checking system performance.

Reading Sight Glass

High and low
pressure pipe
temperature

Sight glass
condition

Air condi-
tioner cycle
condition

The high pressure
pipe is hot and the
low pressure pipe is
cold. There is a dis-
tinct difference in
temperature bet-
ween them.

OK

The high pressure
pipe is warm and
the low pressure
pipe is cool. There
is no great dif-
ference in tempera-
ture between them.

A flow of bubbles
always can be seen.
It appears some-
times transparent,
and sometimes
frothy.

NG

(Not enough

refrigerant)

There is little dif-
ference in tempera-
ture between the
high pressure pipe
and the low press-
ure pipe.

Something like fog
faintly can be seen.

NG

(Almost no

refrigerant)

The high pressure
pipe is hot and the
low pressure pipe is
slightly warm.
There is a difference
in temperature bet-
ween them.

Even at idle with the
fan at “HI” (with the
window fully open),
the bubbles cannot
be seen.

NG

(Too much

refrigerant)

AIR CONDITIONING  1B – 23

Legend

1. Compressor Bracket
2. Seal Washer
3. Refrigerant Line Connector
4. Compressor
5. Serpentine Belt

Removal

1. Disconnect the battery ground cable.
2. Discharge and recover refrigerant

• Refer to Refrigerant Recovery in this

section.

3. Disconnect magnetic clutch harness

connector.

Compressor Assembly and Associated Parts

6VD1/6VE1 (LHD)

1

5

2

3

4

1

852RW010

1B – 24 AIR CONDITIONING

3

4

2

7

8

6

1

5

4. Remove serpentine belt.

•

Move serpentine belt tensioner to loose side using
wrench then remove serpentine belt.

5. Disconnect refrigerant line connector.

•

When removing the line connector, the connecting
part should immediately be plugged or capped to
prevent foreign matter from being mixed into the
line

6. Remove compressor.

Installation

1) Install compressor.

•

Tighten the compressor fixing bolts to the specified
torque.

Compressor Fixing Torque

N·m (kg·m / lb·ft)

19 (1.9 / 14)

2) Connect refrigerant line connector.

•

Tighten the refrigerant line connector fixing bolts
to the specified torque

Refrigerant Line Bolt Torque

N·m (kg·m / lb·ft)

15 (1.5 / 11)

•

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

•

Be sure to apply new compressor oil to the O-rings
when connecting refrigerant lines.

3) Install serpentine belt.

•

Move serpentine belt tensioner to loose side using
wrench, then install serpentine belt to normal
position.

850RY00001

Legend

(1)

Tensioner

(2)

Idle Pulley

(3)

Cooling Fun Pulley

(4)

Serpentine Belt

(5)

Power Steering Oil Pump

(6)

Air Conditioner Compressor

(7)

Crankshaft Pulley

(8)

Generator