We all have been read or been told to use some magic number like 80% of the old charge when retrofitting to a new refrigerant, but is that going to get you where you need to be? How can one number be valid for all the refrigerants that are now available and those they’re replacing? Sounds like a “Rule of Thumb” to me.
To get a much closer estimate for the required weight of the new refrigerant, you need to compare their liquid density. >>>To read this the rest of this article, you must be registered and logged in. Please return to the Home page to log in.<<<