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Lubrication and
1.2
Leak Detection
>
FUNCTION
The A/C loop’s performance and longevity
depends on the refrigerant oil as:
•
It helps cooling down the compressor
and removing impurities from the
system
•
It also keeps the A/C loop sealed by
reinforcing each component’s
•
It prevents damages to the compressor
by lubricating moving parts
Each oil is specific to the compressor
type and car application
>
REPLACEMENT
Refrigerant oil has to be reinjected
every time there is a maintenance or
repair operation on the A/C loop.
Below are some typical problems due
to refrigerant oil:
•
Use of inappropriate type of refrigerant
oil
•
Lack / excess of refrigerant oil Internal
corrosion due to the presence of
humidity in the A/C loop
•
A/C loop blocked (filter drier and
expansion valve blocked)
>
RECOMMENDATIONS
•
Choose the compatible refrigerant
oil (type, quantity and viscosity) with
the compressor type, refrigerant fluid
and car application:
•
Never expose refrigerant oil to
ambient air
•
It is essential to add oil when:
>
Refilling the A/C loop with
refrigerant 10 ml
>
Replacing the condenser - 20 ml
>
Replacing the compressor - check
quantity in catalogue
>
Replacing the receiver drier and
hoses 15 ml
>
Replacing the accumulator - 50 ml
>
Replacing the evaporator - 30 ml
•
Appropriate protection should be
worn: working clothes, safety gloves
and goggles
Refrigerant oil
Find at
www.valeo-techassist.coma cross list with compressor
section and refrigerant
data listed by car manufacturer
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AIR CONDITIONING