What should be done before transferring refrigerant to an empty cylinder?

Before transferring refrigerant to an empty cylinder, it is essential to evacuate the cylinder. This process involves removing any air, moisture, or contaminants, which is vital because the introduction of refrigerant into a cylinder that contains impurities can lead to chemical reactions or reduced efficiency of the refrigerant. Evacuation ensures that the cylinder is ready to safely hold the refrigerant and prevents potential hazards or damage when the refrigerant is introduced.

Ensuring that the cylinder is evacuated enhances the purity of the refrigerant and promotes system efficiency. It also minimizes the risk of contamination that could lead to corrosion or operational issues for the refrigerant system. Proper handling and preparation of the cylinder are fundamental practices in maintaining safety and performance standards in HVAC operations.