I did a leak check with a co-worker on a goodman 3 ton heat pump today. The heat pump is using R 22 not 410a
we used CO2 and blue bubble to check all of the welded joints. When i am about to shoot 350 psi on the high side.
my co-worker said it is not high enough, then we shoot 400 psi to it.
I did use 400 psi for leak check on a coil and i busted the coil once, then i don't use any high psi since then.
What is the right psi or the right way for leak check ? Is it ok to use 400 psi for leak check?
any suggestion or anyone busted coil like i did before??