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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017
3.3
Refrigerant and refrigerant oil
⇒ “3.3.1 Important repair instructions for refrigerant and refriger‐
ant oil”, page 9
⇒ “3.3.2 Refrigerant oil”, page 9
3.3.1
Important repair instructions for refriger‐
ant and refrigerant oil
•
•
•
An air conditioner designed for R1234yf refrigerant must never
be charged with R134a refrigerant.
An air conditioner designed for R134a refrigerant must never
be charged with R1234yf refrigerant.
The refrigerant oils especially developed for refrigerant circuits
with R1234yf and R134a refrigerant may not be used in a re‐
frigerant circuit charged with a different refrigerant unless the
relevant permissions have been granted ⇒ Electronic parts
catalogue and ⇒ Heating, air conditioning system; Rep. gr.
lk
00 ; Technical data; refrigerant oil .
•
•
Air conditioner service stations which come in contact with re‐
frigerant may only be used for the target refrigerant.
A label -A- is attached in the engine compartment to the lock
carrier or the plenum chamber to provide information on the
refrigerant used.
•
•
Different refrigerants must never be mixed.
Depending on the type and production period, it may also in‐
dicate the GWP for the refrigerant used.
•
To ensure that only R1234yf refrigerant with a certain purity
level is drawn into the air conditioner service station (R1234yf),
a gas analysis must be performed before the refrigerant circuit
is emptied
⇒ “2.3 Performing gas analysis of refrigerant”, page 134 .
Note
If, during the gas analysis, it is found that the R1234yf refrigerant
is contaminated with a different gas, it must be extracted from the
refrigerant circuit and analysed, processed or disposed of as gas
of unknown composition in accordance with the legal require‐
ments ⇒ VW / Audi ServiceNet ,
⇒ “2.3 Performing gas analysis of refrigerant”, page 134 and
⇒ “6.2.17 Returning contaminated R1234yf refrigerant for analy‐
sis, processing or disposal”, page 25 .
3.3.2
Refrigerant oil
CAUTION
Risk of chemical burns from atomised refrigerant oil. Eyes and
other parts of the body could be injured.
– Wear protective gloves.
– Wear protective goggles.
– Never inhale atomised refrigerant oil.
♦ Refrigerant oil mixes with the refrigerant (about 10 to 40%,
depending on compressor type and amount of refrigerant) and
circulates constantly in the system, lubricating the moving
parts.
3. Repair notes
9
GETth
English 