How do you braise line set to ac unit?

To braze a line set to an AC unit, first ensure you have the necessary safety gear and tools, including a torch, brazing rod, and flux. Clean the copper surfaces to remove any oxidation or debris, then apply flux to the joint. Heat the joint evenly with the torch until the appropriate temperature is reached, then introduce the brazing rod to the joint, allowing it to flow and fill the gap. Once the joint is complete, allow it to cool naturally before testing for leaks.