Q What is the Charging Pressure for R290 Heat Pump?
A Typically, when charging our R290 refrigerant heat pump, the approach is to raise the low side pressure to a level approximately 10 pounds below the outside air temperature. For instance, at 80 degrees Fahrenheit, the pressure should be brought up to around 70 lbs. This method yields satisfactory results, especially in temperatures up to approximately 85 degrees.