14.02.2016 Views

Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

General information for A/C system<br />

Página 8 de 19<br />

refrigerant circuit under pressure at high temperatures or<br />

breakdown of the lubricating film in the compressor. The<br />

use of non-approved oils can lead to the failure of the air<br />

conditioning system and exclusive use is therefore to be<br />

made of authorized oils.<br />

Parts Catalog<br />

Type of oil for R134a in motor vehicles: PAG<br />

Note:<br />

- Do not store refrigerant oils in open containers as they are<br />

extremely hygroscopic (water-absorbing).<br />

- Always keep oil containers sealed.<br />

- Do not re-use old refrigerant oil. Dispose of as used oil of<br />

unknown origin (refer to Disposal/Environmental Protection,<br />

Vol. 2-2. 43.1).<br />

- Ester-based oils are only intended for use with large<br />

systems (not for motor vehicle air conditioners).<br />

Characteristics of refrigerant oil<br />

The most important properties are a high degree of<br />

solubility with refrigerant, good lubricity, absence of acid<br />

and minimal water content. It is therefore only permissible<br />

to use certain specified oils. For list of approved refrigerant<br />

oils and capacities, refer to<br />

<strong>Repair</strong> Manual, Heating & Air Conditioning, <strong>Repair</strong><br />

Group 87 ,<br />

.<br />

PAG oils, which are appropriate for refrigerant R134a, are<br />

highly hygroscopic and do not mix with other oils. Opened<br />

containers should therefore be closed again immediately to<br />

prevent ingress of moisture. Moisture and acids promote<br />

ageing of refrigerant oil, causing it to become dark and<br />

viscous as well as corrosive towards metals.<br />

Note:<br />

- For refrigerant circuits with refrigerant R134a, only the oil<br />

approved for the A/C compressor may be used. (Capacities<br />

<strong>Repair</strong> Manual, Heating & Air Conditioning, <strong>Repair</strong><br />

http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=...<br />

13/2/<strong>2005</strong>

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!