What precautions should you take prior to recover refrigerant from a chiller suspected of having tube leaks?

Before recovering refrigerant from a chiller suspected of having tube leaks, ensure you wear appropriate personal protective equipment (PPE), including gloves and goggles, to safeguard against exposure. Isolate the chiller from the electrical supply and ensure proper ventilation in the area to prevent the accumulation of harmful gases. Additionally, check for any visible signs of leaks and use leak detection methods to assess the extent of the issue, and prepare a containment system to capture any refrigerant that may escape during recovery.