What is the requirement for recovery devices manufactured before November 15, 1993?

For recovery devices manufactured before November 15, 1993, the requirement is that they must be capable of recovering 80% of the refrigerant. This standard was established to ensure that older equipment still met certain efficiency criteria in refrigerant recovery, even if it had been manufactured prior to more stringent regulations. The purpose of this requirement is to promote environmental protection by ensuring that a significant portion of refrigerants, which are often harmful to the ozone layer and contribute to global warming when released into the atmosphere, are properly recovered during servicing or disposal of refrigeration systems.

The other options present various levels of recovery or operational standards, but the specific requirement set for equipment prior to the specified date is indeed the ability to recover 80% of refrigerant. Thus, the answer highlights the importance of this minimum recovery threshold for older recovery devices in the context of environmental regulations.