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Old 02-10-12, 08:48 AM   #1
TomWS
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Join Date: Feb 2012
Location: Triangle, NC
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Default Pressure Test Mini Split with air instead of Nitrogen?

I'm going to be installing two mini split heat pumps for my workshop and wonder if air can be used to pressure test instead of nitrogen?

My reasoning is that the line sets are open to the air during installation and then all of the gas is purged during vacuum pumping anyway, what's the risk of using compressed air pressure instead of Nitrogen for leak testing?

Tom

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