weight indicated on the vessel is not exceeded. To determine
possible overfilling, the filled containers are to be checked
gravimetrically on a calibrated scale or – provided that the
pressurized gases are not highly toxic – volumetrically. Volu‐
metric checking requires the use of appropriate equipment.
The charging and checking devices must be independent of
each other.
♦ Charging and check measurements are to be performed by
different people. Check measurements must be performed
immediately upon completion of the filling process.
♦ Overfilled vessels must be drained immediately and in a safe
manner until the permissible fill is attained. The compressed-
gas fill is then to be determined again.
♦ Items 4 to 7 do not apply to vessels for liquefied, extremely
low-temperature compressed gases which are neither flam‐
mable nor toxic; this does not affect the provisions of road
traffic legislation.
♦ 10. When filling compressed gas vessels with liquefied gases
at charging temperatures less than or equal to -20° C, the
compressed gas vessel (if the vessel material has not been
tested for temperatures less than or equal to -20° C) is not to
be released from the charging system for transportation until
the vessel wall temperature is greater than or equal to +20° C.
Recycling and Disposal Regulations
♦ Specifications and rules for handling and disposing of refrig‐
erants and refrigerant oils can be found in the chemical-
climate protection provision and recycling and disposal
regulations. These are valid in Germany. Different specifica‐
tions and rules may apply in other countries.
Disposal of Refrigerant
Refrigerants intended for disposal are to be transferred to marked
recycling containers, observing the permissible filling quantity.
Refer to the chemical-climate protection provision and the recy‐
cling and disposal regulations in Germany. Different specifica‐
tions and rules may apply in other countries.
Disposal of refrigerant oil
Used refrigerant oils from systems employing halogenated hy‐
drocarbons are to be disposed of as waste subject to special
supervision. They are not to be mixed with other oils or substan‐
ces. Proper storage and disposal must be ensured in line with
local regulations. Refer to the chemical-climate protection provi‐
sion and the recycling and disposal regulations in Germany.
Different specifications and rules may apply in other countries.
Refer to Audi ServiceNet, HSO Environment.
1.2.2 Charging Systems Not Requiring a Per‐
mit
WARNING
When performing work on refrigerant circuit or when handling
refrigerant observe all generally applicable safety precautions
and pressure vessel regulations.
Charging systems not requiring a permit are ones used for trans‐
ferring compressed gases to mobile compressed-gas vessels for
internal use only.
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
1. General Information 15
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