Quote:
Originally Posted by zx10guy
My buddy did this on my new system to ensure there wasn't any leaks that needed to be tracked down. I forget how long he left the system under vacuum before charging it up with refrigerant.
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When I had my new one/first ever installed last fall, they put it under pressure for 24 hours before charging it. Might have something to do simply that my installer had other/better things to do, and our heat wave was over by then, so I didn't rush him.