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Old 01-02-2010, 03:34 PM
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The new compressor should come with some literature about how much oil should be added prior to running it. If not I would add at least a couple of ounces and add that amount to the total the system requires. The switch on the back of the R4 is a high pressure switch and since you are using the trinary switch from Vintage Air you can ignore it.

Vince
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