What must a technician do before working on an MVAC system?

Before working on an MVAC system, a technician must recover the refrigerant from the system. This step is crucial because refrigerants can be harmful to the environment, particularly those that contribute to ozone depletion and global warming. By recovering the refrigerant, the technician ensures that it is safely contained and can be recycled or disposed of properly, aligning with environmental regulations and safety protocols.

Recovering the refrigerant also protects the technician and the general public from potential health hazards associated with refrigerant exposure. Furthermore, it allows the technician to work effectively on the system without the risk of contaminating the new refrigerant or affecting the performance of the system. Overall, recovering the refrigerant is an essential practice that upholds environmental responsibility and safety standards in the industry.