I don't know. Is the process you're referring to supposed to remove all of the impurities in the line after brazing? Isn't there some kind of filter built in to the system that does this?
Originally posted by frigetater
Hi. I have been following this since you first posted. Glad the obvious problems, mostly cosmetic, have been taken care of. But like what was said earlier...was there a nitrogen purge during brazing and a 500 micron vac done after brazing? This will really come back to haunt you in the future. You have put out a lot of money on this system and I hope the installers did the purge and vac.