What are the steps for adding refrigerant?

[VonKayden]

Steps for adding refrigerant: 1. Close the high and low pressure manual valves on the manifold pressure gauge; 2. Connect one end of the middle hose to the refrigerant tank injection valve fitting; 3. Open the high-pressure side manual valve to the fully open position and invert the refrigerant tank; 4. Inject the specified amount of liquid refrigerant from the high-pressure side. Refrigerant is the medium substance used in various heat engines to complete energy conversion, typically utilizing reversible phase changes to increase power. In general steam engines, the thermal energy of steam is released and converted into mechanical energy to generate motive power, while the refrigerant in refrigeration machines is used to transfer heat from low-temperature areas to high-temperature areas.