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1. Recovery phase started
with cold car
Where the car is cold or the A/C
system has not been recently
activated, the refrigerant in the
car will be mostly in liquid state.
This will slow down the recovery
phase and some small quantities
of the R134a refrigerant might
get stuck in the curved parts of
the system where evaporation is
slower. These will hence not be
recovered. Such small quantities
of gas will be expelled from
the circuit only during the
subsequent vacuum phase, as
they need the time physically
required to expand and to move
from liquid to gaseous state.
Easy fix, start the recovery
phase after the A/C system
has been turned on for some
minutes.
2. Leakages in the car system
If during the vacuum phase
the car circuit is not tight, air
can get into it and get mixed
with the pump oil thus easing
atomisation. Just check at the
system has been correctly
tightened before starting.
3. Pump oil needs to be
replaced
Polluted oil can no longer
perform to its desired level.
Periodically replace the pump
oil. The vacuum pump needs
to be adequately lubricated.
Oil needs to be replaced
every 60 hours of operation,
as indicated by Brain Bee
stations.
WHAT ARE THE FUNCTIONS
AND THE CHARACTERISTICS
OF THE VACUUM PUMP?
In Brain Bee Machines, the
Vacuum Pump is a centrifugal
vane pump, the aim of which is
to extract the R134a residues
and every other gas present in
the car system before
re-injecting new refrigerant.
Oil replacement is extremely
important to ensure the ideal
vacuum level is achieved and
to keep the pump in perfect
working conditions.
We hope we have provided
you with key information on
this issue, and we are sure this
will help you provide future
explanations to customers and
to increase knowledge on the
A/C sector.
As always, if you need any help
our Air Con team is on hand to
answer any questions:
Aaron McFarlane
aaron.macfarlane@eurocarparts.comCisco: 7001 - 595