Cleaning your hoses with alcohol and getting out a mirror to blow against, how long does it take you to do an install. I'm all for using good practices and make a point to do them but around here my customers or boss aren't gonna let me spend 3 days on a simple changeout.
No, you only do it once with each new bottle of CO2. You don't test it every job.
CO2 is charged as a braze purge in gas state, not a liquid. Plenty of ways to take what you say on condensation.Care to expand?
On the CO2 molecular weight being lower than nitrogen...that is a plus because the CO2 will show smaller leaks than nitro will.
Quote Unless of course CO2 is indeed the refrigerant being used... Then of course the action changes. Nitrogen also does not convert as much as carbon dioxide does when brazing temperatures are realized. If you really want to get trick, use argon. End quote
Co2 is the end of the combustion process...it cant "convert" as you put it at brazing temps.
Not going to get into a pissing for distance contest with you, never said you can't use it, quite the contrary.
However, if not done properly, will chill the piping and cause a ton of condensation to from inside the pipe.
Nitrogen is pretty much idiot proof (until a better idiot shows up to the job site).
The "convert" I was referring to is the potential of flash steam when the potentially liquid Co2 hits the warm temps.. Not anything else.
If the technician were to overfeed the Co2 is when things will happen in negative manner... Stupid is as stupid does.
If a day goes by and you have learned nothing, I hope you got a lot of sleep.