EcoRenovator  

Go Back   EcoRenovator > Improvements > Geothermal & Heat Pumps
Advanced Search
 


Blog 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 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
Default 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

DeanV is offline   Reply With Quote
Old 02-27-14, 06:36 PM   #2
jeff5may
Supreme EcoRenovator
 
Join Date: Jan 2010
Location: elizabethtown, ky, USA
Posts: 2,428
Thanks: 431
Thanked 619 Times in 517 Posts
Send a message via Yahoo to jeff5may
Default

Yes, that's exactly what I use when purging and leak checking units. I have a bottle of C25 gas that has found a second purpose in life besides mig welding. Works just fine. I pressurize to around 200 psi and let the rig sit for an hour after curing obvious leaks.

Just remember to draw a deep vacuum on your system afterwards. The deeper, the better. Especially if you're using R410a. It and the oil it uses both hate water. In fact, the mfr's recommend replacing the oil if it ever contacts the atmosphere. The oil absorbs water and doesn't let it go, like brake fluid.
jeff5may is offline   Reply With Quote
The Following User Says Thank You to jeff5may For This Useful Post:
DeanV (02-28-14)
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 05:08 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design