When using recovery or recycling equipment manufactured after November 15, 1993, technicians must evacuate low pressure appliances to which level before disposal?

For low-pressure appliances, the requirement is to evacuate them to a level that ensures the removal of any refrigerant or moisture prior to disposal. Specifically, the evacuation must be to a level of 25 mm of Hg absolute pressure. This standard is set to ensure that the system is effectively cleared of refrigerant, which can be harmful to the environment.

Evacuating to 25 mm of Hg absolute is equivalent to achieving a vacuum level that is safe for disposal and complies with regulations on refrigerant handling. Understanding this specification is crucial for technicians to guarantee they are adhering to environmental guidelines and ensuring the safety of disposal procedures.

Achieving a vacuum equivalent to 25 mm of Hg absolute implies that there is minimal pressure remaining in the appliance, thus reducing the risk of refrigerant release during the disposal process.