R and V Works FF6 Informations techniques télécharger pdf (Page 76)

Compressor Application Manual

VII

• Due to problems of chemical

compatibility, the filter drier normally

used for a system that operates with

R 12, shall be substituted by one

compatible with the blend (see Chapter

VI, item 2).

• Refrigerant fluids (blend) in the system

shall only be charged at the liquid

stage, due to the aforementioned

differences in density.

4 - Alternative refrigerant R 134a

Chosen to replace the R 12 because it has

properties similar to it and does not have the power

to destroy the ozone layer (ODP = 0).

Comments:

• Leakage will cause little (R 134a has GWP)

environmental impact.

• Only recommended for use in new systems

specially designed for its use. The main

reasons are:

– It may require an alteration in the capillary tube

to maintain the system's performance, when

compared to the use of R 12.

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R and V Works FF6 Informations techniques Page 76