R and V Works FF6 Technical Information Seite 66

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Compressor Application Manual
64
VII
1 - Impacts
1.1 - Water
In a refrigeration system using a
compressor that operates with R 12
(compatible with mineral and synthetic
lube oils), a little water means an
enormous hazard to the whole system.
In a refrigeration system using a
compressor that operates with R 134a,
the negative impacts caused by water
are even greater. The lube oils for R 134a
compressors are highly hygroscopic
(water-absorbing) and unstable esters.
In addition to the damages mentioned
above, it is common for the capillary tube
to become blocked due to acid residues.
Further
information
Figure 42 - Chemical reaction between ester oil and water
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