R and V Works FF6 Informations techniques télécharger pdf (Page 70)

Compressor Application Manual

VII

1.6 - Chemical Compatibility

1.6.1 - Non-miscible Residue

Non-miscible residues are those

that remain dissolved in the ester

oil blend and R 134a at

temperatures above -35

C (-31

F).

The main potentially non-miscible

products belong to the families of:

Wax, Grease and Oils

Silicone and paraffin are the most

undesirable components in the

composition of the

aforementioned products.

These products dissolve in ester

oil at high temperatures (as in the

compressor and condenser), and

can be drawn by R 134a through

the refrigeration circuit. In low

temperature regions (such as in

the evaporator and at the capillary

outlet), these non-miscible

products separate and solidify,

then becoming elements of risk,

principally in terms of "blockage".

1.6.2 - Incompatible residues

Incompatible residues are those

that may act on the ester oil to

reverse the reaction of forming

ester oil.

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R and V Works FF6 Informations techniques Page 70