Hi,

I'm currently involved in the installation of 38AP Carrier units that utilizes R410A.

Question:

Is there any pertinent document that can be used to "justify" the use of 600 and 300 psig on the test (beyond that of the manufacturers documentation)? A code perhaps? A recent ruling?


I've been using pressure test of 600psig (hi-side) and 300psig (lo-side) for the piping system for most of my R410A installations (in particular for VRF multi system - TOSHIBA SMMSi if you may) - which, is as recommended by TOSHIBA themselves.
Im being chased for such documents that was raised recently by our principals.

If anyone here knows of any, please let me know, It'll be a great help.

Thanks