What vacuum level must technicians achieve in low pressure appliances before disposal as of regulations after November 15, 1993?

Technicians must achieve a vacuum level of 29 inches of mercury (Hg) for low-pressure appliances prior to disposal. This requirement is established to ensure that all refrigerants are properly removed from equipment, minimizing environmental impact and adhering to regulations that aim to control the release of harmful substances. Achieving a vacuum of 29 inches of mercury indicates that the refrigerant has been effectively evacuated, reducing the risk of any potential leaks or emissions during the disposal process. This standard reflects the commitment to environmental safety and proper handling of substances that can harm the ozone layer or contribute to climate change. Maintaining adherence to this vacuum level is essential for compliance with regulations established after November 15, 1993, ensuring that technicians are properly trained and equipped to handle these responsibilities.