Answer :
Final answer:
A technician may only recover CFC refrigerant to atmospheric pressure in exceptional circumstances where recovery equipment is not available, acting in compliance with environmental regulations such as the Montreal Protocol.
Explanation:
The circumstances under which a technician may recover the CFC refrigerant in an appliance to atmospheric pressure only are extremely limited and are typically governed by environmental legislation such as the Montreal Protocol.
The recovery to just atmospheric pressure might happen in situations where the recovery equipment is malfunctioning or not available and only as a last resort under approved protocols to minimize environmental harm. Since CFCs are ozone-depleting substances, they must be handled with great care, and complete recovery and proper recycling or disposal are generally required to avoid harm to the ozone layer.
