Renault Laguna III Manual page 2564

Refrigerant circuit: Draining - Filling
AIR CONDITIONING 01 or AIR CONDITIONING 02
I - RECOVERING REFRIGERANT FLUID
a
Note:
- If the air conditioning circuit is fitted with a sin-
gle filler valve, some filling equipment only
requires the use of the high pressure pipe (refer
to the filling station instructions).
- Depending on the situation, run the system for
a few minutes before recovering the coolant to
improve drainage.
Note:
It is essential to follow these procedures to pre-
vent:
- gas escaping when the circuit is opened,
- pollution of the environment through the release
of gas into the atmosphere when the circuit is
opened or when a vacuum is created.
When draining or checking the refrigerant fill load,
three scenarios are to be taken into account:
- the engine is running and the air conditioning is in
operation (A),
- the engine is running but the air conditioning is not
in operation (B),
- the engine is not running nor is the air conditioning
in operation (C).
a Scenario A:
- Operate the air conditioning until the cooling fan
assembly is triggered twice,
- Switch off the engine,
- drain for the first time (note down the original val-
ue),
- wait 15 minutes,
- check that the relative pressure is no more than 0
bar,
- repeat the cycles until the relative pressure is equal
to or less than 0 bar,
- add together the values of the various draining op-
erations; the fill is confirmed as being correct if the
volume of refrigerant fluid is the specified fill +35g
or -100g.
Scenario B:
- run the engine until the cooling fan is triggered
twice,
- Switch off the engine,
AIR CONDITIONING
62A-8
- drain for the first time (note down the value),
- wait 15 minutes,
- run the engine until the cooling fan is triggered
twice,
- Switch off the engine,
- drain for the second time (note down the value),
- repeat the cycles until the relative pressure is equal
to or less than 0 bar,
- add together the values of the various draining op-
erations; the fill is confirmed as being correct if the
volume of refrigerant fluid is the specified fill +35g
or -100g.
Scenario C:
- drain for the first time (note down the value),
- wait 2 hours,
- repeat the cycles until the relative pressure is equal
to or less than 0 bar,
- add together the values of the various draining op-
erations; the fill is confirmed as being correct if the
volume of refrigerant fluid is the specified fill +35g
or -100g.
II - CREATING A VACUUM
a It is essential to carry out vacuum extraction correct-
ly before loading, otherwise the air conditioning will
not work properly.
There are two scenarios to consider:
- vacuum created immediately after discharge (sce-
nario A),
- vacuum created after an interval of several hours
or days (scenario B).
Scenario A:
- creation of a vacuum takes 20 minutes.
Scenario B:
- creation of a vacuum takes 45 minutes to elimi-
nate any trace of moisture.
a Test the seal once the vacuum has been created
(some stations do this automatically).
III - FILLING
a Fill up the refrigerant circuit using the refrigerant
charging station.
62A