Range Rover. Manual - part 293

AIR CONDITIONING

ADJUSTMENT

GENERAL PRECAUTIONS

The refrigerant used in the air conditioning system is
HFC (Hydrofluorocarbon) R134a.

WARNING: R134a is a hazardous liquid
and when handled incorrectly can cause
serious injury. Suitable protective clothing

must be worn when carrying out servicing
operations on the air conditioning system.

WARNING: R134a is odourless and
colourless. Do not handle or discharge in
an enclosed area, or in any area where the

vapour or liquid can come in contact with naked
flame or hot metal. R134a is not flammable but
can form a highly toxic gas.

WARNING: Do not smoke or weld in areas
where R134a is in use. Inhalation of
concentrations of the vapour can cause

dizziness, disorientation. uncoordination,
narcosis, nausea or vomiting.

WARNING: Do not allow fluids other than
R134a or compressor lubricant to enter the
air conditioning system. Spontaneous

combustion may occur.

WARNING: R134a splashed on any part of
the body will cause immediate freezing of
that area. Also refrigerant cylinders and

replenishment trolleys when discharging will
freeze skin to them if contact is made.

WARNING: The refrigerant used in an air
conditioning system must be reclaimed in
accordance with the recommendations

given with a Refrigerant Recovery Recycling
Recharging Station.

NOTE: Suitable protective clothing
comprises: Wrap around safety glasses or
helmet, heatproof gloves, rubber apron or

waterproof overalls and rubber boots.

REMEDIAL ACTIONS

1. If liquid R134a strikes the eye, do not rub it.

Gently run large quantities of eyewash over the
eye to raise the temperature. If eyewash is not
available cool, clean water may be used. Cover
eye with clean pad and seek immediate medical
attention.

2. If liquid R134a is splashed on the skin run large

quantities of water over the area as soon as
possible to raise the temperature. Carry out the
same actions if skin comes into contact with
discharging cylinders. Wrap affected parts in
blankets or similar material and seek immediate
medical attention.

3. If suspected of being overcome by inhalation of

R134a vapour seek fresh air. If unconscious
remove to fresh air. Apply artificial respiration
and/or oxygen and seek immediate medical
attention.

NOTE: Due to its low evaporating
temperature of -30

C, R134a should be

handled with care.

WARNING: Do not allow a refrigerant
container to be heated by a direct flame or
to be placed near any heating appliance. A

refrigerant container must not be heated above
50

WARNING: Do not leave a container of
refrigerant without its cap fitted. Do not
transport a container of refrigerant that is

unrestrained, especially in the boot of a car.

AIR CONDITIONING

NEW RANGE ROVER

ADJUSTMENT

SERVICING PRECAUTIONS

Care must be taken when handling refrigeration
system components. Units must not be lifted by their
hoses, pipes or capillary lines. Hoses and lines must
not be subjected to any twist or stress. Ensure that
hoses are positioned in their correct run before fully
tightening the couplings, and ensure that all clips and
supports are used. Torque wrenches of the correct
type must be used when tightening refrigerant
connections to the stated value. An additional spanner
must be used to hold the union to prevent twisting of
the pipe.
Before connecting any hose or pipe ensure that
refrigerant oil is applied to the seat of the new ’0’ ring
but not to the threads.
Check the oil trap for the amount of oil lost.
All protective plugs on components must be left in
place until immediately prior to connection.
The receiver/drier contains desiccant which absorbs
moisture. It must be positively sealed at all times.

CAUTION: Whenever the refrigerant
system is opened, the receiver/drier must
be renewed immediately before evacuating

and recharging the system.

Use alcohol and a clean cloth to clean dirty
connections.
Ensure that all new parts fitted are marked for use
with R134a.

Refrigerant oil

Use the approved refrigerant lubricating oil:
V8 models up to 99MY: Sanden SP10
V8 models from 99MY and diesel models: Nippon
Denso ND-OIL 8

CAUTION: Do not use any other type of
refrigerant oil.

Refrigerant oil easily absorbs water and must not be
stored for long periods. Do not pour unused oil back
into the container.
When renewing system components, add the
following quantities of refrigerant oil:

Condenser

40 cm

.......................................................

Evaporator

80 cm

.......................................................

Pipe or hose

20 cm

.....................................................

Receiver/drier

20 cm

...................................................

A new compressor is sealed and pressurised with
Nitrogen gas, slowly release the sealing cap, gas
pressure should be heard to release as the seal is
broken.

NOTE: A new compressor should always
have its sealing caps in place and must
not be removed until immediately prior to

fitting

Fitting a new compressor
A new compressor is supplied with an oil fill (Xcm

) of:

V8 up to 99MY

150 cm

.......................................

V8 from 99MY

180 cm

.......................................

Diesel

140 cm

....................................................

A calculated quantity of oil must be drained from a
new compressor before fitting.
To calculate the quantity of oil to be drained:

1. Remove sealing plugs from the OLD

compressor.

2. Invert compressor and gravity drain oil into

measuring cylinder. Rotating the compressor
clutch plate will assist complete draining.

3. Note the quantity of oil drained (Ycm

4. Calculate the quantity (Qcm

) of oil to be drained

from the NEW compressor using the following
formula:

Xcm

- (Ycm

+ 20cm

) = Qcm

AIR CONDITIONING

ADJUSTMENT

Rapid refrigerant discharge
When the air conditioning system is involved in
accident damage and the circuit is punctured, the
refrigerant is discharged rapidly. The rapid discharge
of refrigerant will also result in the loss of most of the
oil from the system. The compressor must be
removed and all the remaining oil in the compressor
drained and refilled as follows:

1. Gravity drain all the oil, assist by rotating the

clutch plate (not the pulley).

2. Refill the compressor with the following amount

of new refrigerant oil:
V8 up to 99MY

100 cm

.......................................

V8 from 99MY

130 cm

.......................................

Diesel

90 cm

......................................................

3. Plug the inlet and outlet ports.

Servicing Equipment

The following equipment is required for full servicing
of the air conditioning system.

Recovery, recycling and charging station
Leak detector
Thermometer +20

C to -60

Safety goggles and gloves

REFRIGERANT RECOVERY, RECYCLING AND
RECHARGING

Service repair no - 82.30.02

Refrigerant recovery

1. Remove dust caps from high and low pressure

connectors.

2. Connect high and low pressure hoses to

appropriate connections.

3. Open valves on connectors.
4. Turn valves on refrigerant station to correct

positions.

NOTE: Operate the refrigerant station in
accordance with the manufacturers
instructions.

5. Turn Process switch to correct position.
6. Turn Main switch to ’ON’.
7. Allow station to recover refrigerant from system.

AIR CONDITIONING

NEW RANGE ROVER

ADJUSTMENT

WARNING: Refrigerant must always be
recycled before re-use to ensure that the
purity of the refrigerant is high enough for

safe use in the air-conditioning system. Recycling
should always be carried out with equipment
which is design certified by Underwriter
Laboratory Inc. for compliance with SAE J1991.
Other equipment may not recycle refrigerant to
the required level of purity. A 134a Refrigerant
Recovery Recharging Station must not be used
with any other type of refrigerant. Refrigerant
R134a from domestic and commercial sources
must not be used in motor vehicle air conditioning
systems.

8. Close valves on refrigerant station.
9. Turn Main switch to ’OFF’.

10. Close valves on connectors.
11. Disconnect connectors high and low pressure

hoses from connectors.

12. Fit dust caps to connectors.
13. Open tap at rear of station to drain refrigerant oil.
14. Measure and record quantity of refrigerant oil

recovered from system.

15. Close tap at rear of station.

Evacuation

WARNING: Servicing must be carried out
by personnel familiar with both the vehicle
system and the charging and testing

equipment. All operations must be carried out in a
well ventilated area away from open flame and
heat sources

1. Remove dust caps from high and low pressure

connectors.

2. Connect high and low pressure hoses to

appropriate connections.

3. Open valves on connectors.
4. Turn valves on refrigerant station to correct

positions.

5. Turn Process switch to correct position.
6. Turn Main switch to ’ON’.
7. Allow station to evacuate system.

Recharging

1. Close valves on refrigerant station.
2. Close valve on oil charger.
3. Disconnect yellow hose from refrigerant station.
4. Remove lid from oil charger.
5. Pour correct quantity of refrigerant oil into oil

charger.

6. Fit lid to oil charger.
7. Connect yellow hose to refrigerant station.
8. Open valve on oil charger.
9. Move pointer on refrigerant gauge to mark

position of refrigerant drop.

10. Slowly open correct valve on refrigerant station

and allow vacuum to pull refrigerant into system.

11. Close valve on refrigerant station when correct

amount of refrigerant has been drawn into air
conditioning system.

12. Turn Main switch to ’OFF’.
13. Close valves on connectors.
14. Disconnect high and low pressure hoses from

connectors.

15. Fit dust caps to connectors.

Content .. 291 292 293 294 ..