Pressure testing for leaks on split a/c systems

[capthummel]

Hi, yes you can do it connected to the outdoor unit, make sure the flare nuts are not overtightened, use a torque wrench to manufacturers spec, its in the manual, the copper pipe will burst before the flare connection will. Make sure you only preesure test for a few minutes at that pressure then do a standing leak test around 140 psi for as long as you like!

cheers

I have had many leaks from screwed up threads on the nut side that have passed leak testing and vacuum that leak after releasing refrigerant. The problem is usually a half thread at the very bottom of the nut now I re flare as a standard good flare from the factory or not it is the easiest way to relieve what has become a standard head ache at least from fujitsu. Also I think fujitsu's toque values are BS.