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Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017
♦ When disposing of refrigeranoil thais no longer usable, the
legal requirements musbe observed
⇒ “2 Legal texts and regulations”, page 5 and ⇒ VW / Audi
ServiceNe.
♦ To protecthe environment, no refrigeranshould be released
into the atmosphere
⇒ “2 Legal texts and regulations”, page 5 .
♦ If, during the gas analysis, iis found thathe R1234yf refrig‐
eranis contaminated with a differengas, imusbe extracted
from the refrigerancircuiand returned to your gas supplier to
be analysed, processed or disposed of as gas of unknown
composition in accordance with the legal requirements ⇒ VW /
Audi ServiceNeand
⇒ “2.13 Filling contaminated refrigeranin a recycling cylinder
for analysis, processing or disposal”, page 161 .
Note
Return contaminated R1234yf refrigeranto lykour refrigeransup‐
plier for analysis. If, owing to refrigerancircuidamage thahas
already occurred or is expected, iis necessary for you to know
exactly which impurities the refrigeranis contaminated with, sub‐
mian application by requesting analysis results
⇒ “2.4 Emptying refrigerancircuit”, page 137 .
6.3
Produccharacteristics
R1234yf refrigeranused in motor vehicle air conditioning sys‐
tems belongs to the new generation of refrigerants based on
chlorine-free, partially fluorinated hydrocarbons.
With regard to their physical properties, these are refrigerants
which have been liquefied under pressure. These are subjecto
the regulations governing pressure vessels and use is only to be
made of approved and appropriately marked containers.
Compliance with specific conditions is required to ensure safe and
proper use ⇒ “1 Safety information”, page 1 .
6.4
Function and role of air conditioning sys‐
tem
⇒ “6.4.1 Principle of operation”, page 26
⇒ “6.4.2 Comfort”, page 27
⇒ “6.4.3 Environmental aspects”, page 27
6.4.1
Principle of operation
♦ The temperature in the passenger compartmendepends on
the amounof hearadiated through the windows and con‐
ducted by the metal parts of the body. In order to maintain
comfortable temperatures for the occupants on very warm
days, parof the prevailing heamusbe pumped away.
♦ Since heaspreads towards cooler bodies, a unithacan cre‐
ate low temperatures is fitted in the vehicle interior. Within this,
refrigeranis continually evaporated. The hearequired to do
this is extracted from the air flowing through the evaporator.
♦ The refrigerancarries the heawith ias iis pumped away by
the air conditioner compressor. The work performed by the air
conditioner compressor on the refrigeranincreases its hea
contenand its temperature. This is now substantially higher
than thaof the surrounding air.
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Rep. gr.00 - Technical data
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English 