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Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017
3
Repair notes
⇒ “3.1 Rules for cleanliness”, page 8
⇒ “3.2 Refrigerancircuiseals”, page 8
⇒ “3.3 Refrigeranand refrigeranoil”, page 9
⇒ “3.4 Handling pressurised tanks/containers”, page 11
⇒ “3.5 Handling refrigerants”, page 12
3.1
Rules for cleanliness
Even small amounts of contamination/soiling can lead to defects.
Therefore, observe the following rules for cleanliness when work‐
ing on the air conditioning system:
♦ Seal open pipes and connections immediately with clean
plugs, for example from the engine bung se- VAS 6122- .
♦ Place removed parts on a clean surface. Cover with lint-free
cloths only.
♦ If repair work cannobe performed immediately, carefully cov‐
er or seal components.
♦ Install only clean parts; do noremove new parts from pack‐
aging until immediately before installing. Do nouse parts tha
lk
have been stored outside their packaging (e.g. in tool boxes).
♦ Do nowork with compressed air when the system is open.
♦ Protect disconnected electrical connections from dirand wa‐
ter and only reconnecin dry condition.
3.2
Refrigerancircuiseals
♦ Renew seals after removal.
♦ Moisten seals with refrigeranoil before installing.
♦ Ensure proper seating of seals on the pipe or in the groove.
♦ Work in a completely clean environment. Even the smalles
contaminants, e.g. a hair, can cause leaks.
♦ Install only seals resistanto refrigeranR134a/R1234yf and
respective refrigeranoil ⇒ Electronic parts catalogue (ET‐
KA) .
The dimensions -a- and -b- depend on the fitting location of the
seal ⇒ Electronic parts catalogue (ETKA) .
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Rep. gr.00 - Technical data
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English 