What evacuation level must technicians achieve for low-pressure appliances before disposal, according to regulations for recovery and recycling equipment manufactured after November 15, 1993?

Technicians must achieve an evacuation level of 25 mm of Hg absolute for low-pressure appliances before disposal, as specified by EPA regulations. This requirement is part of the mandate to ensure that refrigerants are properly removed from appliances to prevent environmental damage.

Evacuating to 25 mm Hg absolute helps ensure that most of the refrigerant is removed from the system, minimizing the risk of releasing harmful substances into the atmosphere. Low-pressure appliances, such as chillers and certain types of commercial refrigeration units, often contain refrigerants that, if released, can contribute to ozone depletion and global warming. Therefore, achieving this specific evacuation level aligns with both safety and environmental protection standards.

This standard applies to recovery and recycling equipment manufactured after November 15, 1993, and the specified evacuation level is supported by testing and industry practices to ensure the effectiveness of refrigerant recovery.