We have been queried on the pressure testing we do on R410a AC.

Any feed back appreciated on this one please 😃

We strength test at 43 bar (1.3 x MWP) for 15 minutes and leak test at 37 bar (1.1 x MWP), always have done. This is ok isn’t it? Its never been a problem before.

There’s been a couple of coils leak when we’ve tested AHU coils once installation has been completed but I’m sure the coils are at fault as the pressure was dropping at 20 bar.