Pressure test minisplit ductless system

DeanV · 02-27-14, 03:31 PM

I know you have to pressure test a ductless system on install using dry nitrogen. Thing is, I have a cylinder of MIG shielding gas (Ar/CO2 mix) and was wondering if anybody used it instead of bottled nitrogen. Compressed cylinder gas spec sheets suggest that bottled N2, Ar, and CO2 all have similar moisture specs of less than 10ppm so it would seem ok. Just wondered if anybody has actually used shielding gas instead of nitrogen.
dean

02-27-14, 03:31 PM	#1
DeanV Lurking Renovator Join Date: Feb 2014 Location: texas Posts: 1 Thanks: 2 Thanked 0 Times in 0 Posts	Pressure test minisplit ductless system I know you have to pressure test a ductless system on install using dry nitrogen. Thing is, I have a cylinder of MIG shielding gas (Ar/CO2 mix) and was wondering if anybody used it instead of bottled nitrogen. Compressed cylinder gas spec sheets suggest that bottled N2, Ar, and CO2 all have similar moisture specs of less than 10ppm so it would seem ok. Just wondered if anybody has actually used shielding gas instead of nitrogen. dean