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What is R-134a Refrigerant Charging Guide about?

This document describes the steps taken to recharge R-134a refrigerant in a refrigeration bank. First, the gauges were connected and a vacuum was performed for 20 minutes to remove air and moisture from the circuit. Then, the gas bottle was connected and the valve was opened to charge the refrigerant. Finally, it is emphasized that before any recharge, it is necessary to locate and repair leaks; otherwise, the gas will be lost again.

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