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Charging an R-410A AC Unit that is Very Low on Refrigerant with the Subcooling Method!

In this HVAC Training Video, I show How to Add R-410A into a Running Air Conditioner that is Very Low on Refrigerant. I Show the Step by Step Procedure for Connecting the Hoses and Manifold Gauges, Air Purging, Charging Process, Digital Scale Use, the Subcooling Method, Total Superheat Method, What Happens to the Pressures and Temperatures as Refrigerant is Added, How to Charge the Refrigerant from the Hoses Back into the System, and How to Disconnect the Gauge Set!

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