What precaution should be used prior to recovering refrigerant from a chiller suspected of having tube leaks?

Before recovering refrigerant from a chiller suspected of having tube leaks, it is essential to conduct a thorough leak inspection to confirm the presence of leaks and assess their severity. Ensure that all safety protocols are followed, including wearing appropriate personal protective equipment (PPE) and ensuring proper ventilation. Additionally, it is advisable to isolate the chiller from the system, and, if possible, to use a recovery machine designed for the specific refrigerant type to manage any potential contaminants. Lastly, consider using a refrigerant identifier to ensure that the recovered refrigerant is properly classified.