Quote:
Originally Posted by BWhitmore
The AC system can be given an initial charge without the compressor being engaged. This is a common procedure especially if the system has a low pressure (binary) switch. The low pressure switch will not allow the compressor to engage unless there is some refrigerant pressure in the system.
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I don't do A/C everyday. It is not my trade but I have done enough to know what I am talking. I would doubt any professionals would charge the system to the 'correct' pressure, as per the OP, without the compressor running/engaging.