Conversion of Portuguese centrifugal chiller from R-12 to ISCEON ® 39TC ® Application Profile Application Although the use of CFCs has been banned in the EU for several years now, there are many large chiller systems still operating with R-12. This is still legal until the chiller requires mainte- nance which would involve the handling of re- frigerant: once removed from the system the CFC refrigerant cannot be replaced (neither can the charge be

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