HVAC - EPA Certification Practice Exam

The proper procedure for recovering refrigerants when using multiple types is to recover them in separate tanks. This ensures that different refrigerants, which can have varying chemical properties, do not mix. Mixing them can lead to complications such as incompatibility, chemical reactions, or even creation of toxic substances, which poses a significant risk to safety and the environment.

Additionally, certain refrigerants have specific disposal or recycling requirements, and mixing them could prevent proper handling in accordance with those regulations. Using separate recovery tanks allows for proper identification and management of each type of refrigerant, which is essential for compliance with environmental and safety standards. Overall, maintaining the integrity of each refrigerant type during the recovery process is crucial for responsible HVAC practices.