I started installing HVAC units in 1993 and I have installed quite a few systems and made a bunch of repairs over the years. I have only purged nitrogen once or twice while brazing. I have worked with a lot of different techs over the years. I have never seen or heard of anyone actually brazing during a residential install or repair. (Other than guys online that I don't actually know.)
But, It seems everyone on forums seems to "always" purge with nitro during there installs and repairs. I think a lot of people claim to purge during brazing but, I think very very few actually do.
Anyway, I really think this whole purging during brazing is not needed. I sure don't seem to have any problems. I pull good vacuums, back sure I have good duct work, airflow, get sub-cooling and super heat dead on and I seem to have zero problems..
I am sure I will get attacked by all the online super techs.. Which is fine..
But, It seems everyone on forums seems to "always" purge with nitro during there installs and repairs. I think a lot of people claim to purge during brazing but, I think very very few actually do.
Anyway, I really think this whole purging during brazing is not needed. I sure don't seem to have any problems. I pull good vacuums, back sure I have good duct work, airflow, get sub-cooling and super heat dead on and I seem to have zero problems..
I am sure I will get attacked by all the online super techs.. Which is fine..
