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Thread: r290 replace
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22-05-2007, 08:21 AM #1
r290 replace
I'm going to fill a 32,000 BTU window unit with r290. It's just a few years old, I don't know what kind of refrigerant was in it. One of the pipes was punctured, and I fixed it. When I refill it, do I need to create a vacuum to remove the existing air in the pipes? If so, How do I do that?
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