How to add Freon to a Air Conditioner or Refrigeration System
I disagree with your stament "Heat Pumps are very sensitive to either under or over charging. The only correct way to charge a heat pump is to evacuate the system and weigh in the correct charge." weighing it in is not the best way to make it perfect on a heat pump system (weighing in method is for sealed small refrigeration), superheat and subcooling with a manufacturers charging chart displaying wetbulb or drybulb relationship to charge, some manufactures even specify the use of the approach method. Charging should always be done in cooling and line sets must be dead on right size and never exceed 50 ft in length. Charging mainly just needs to be done by a professional never ever anyone without experience or knowledge, its a dangerous chemical (any of them) that can cause injury, also important is making sure you have the correct metering device and that all heat pump systems are an ahri match.
Aug 18, 2010 |