HVAC Basics: How to Check R22, R410a Subcooling when you don't know the Rating or Refrigerant!

In this HVAC Video, I go over what Subcooling to set an Air Conditioning System to if the rating plate is worn off. I also go over how to figure out what refrigerant is in the unit in order to accurately check the refrigerant charge. Subcooling is used to check the refrigerant charge on every unit that has a txv metering device at the indoor coil. This is because the TXV is able to make the most out of the evaporator coil by controlling the superheat at all times. I explain why I set the subcooling at a certain spot when I can't find a target subcooling rating from the manufacturer.