What refers to the process of removing unwanted gases from the system and capturing it in a recovery cylinder?

The process of removing unwanted gases from a system and capturing it in a recovery cylinder is known as recovery. This procedure is an essential practice in maintaining HVAC systems and refrigeration units, ensuring that refrigerants and other gases are properly managed to prevent environmental harm. Recovery involves using specialized equipment to extract the gas from the system and store it safely for later recycling or disposal.

In contrast, disposal refers to the final disposal of waste materials, which is not about the capturing process. Charging involves adding refrigerant into the system, which is the opposite of what recovery does. Recycling typically involves processing refrigerants so they can be reused, but it assumes that the refrigerant has already been recovered, thus distinguishing recovery as the first critical step in handling unwanted gases. This makes recovery the correct term for the process described in the question.