Evacuating / Pulling vacuum
When you pull down an AC system for recharge....
My vacuum pump pulls the pressure down to about -30 on the low-side gauge in just a few minutes. But I've always heard you should let the pump run for quite some time. If the pump has pulled the system to as low a vacuum as it can, what is the point of continuing to let it run? Or is there one? |
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I agree. But once the pressures equalize and the pump has lowered the pressure as far as it is able, can any more moisture be removed?
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I'm not sure...I have always let my pump run for 20 to 30 minutes and then charge the system. Never had a problem with this method and I always replace the drier/receiver when I open the system.
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Let Her Run
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Bruno |
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