Which piece of equipment is essential for the recovery of refrigerants?

• A. Compressor
• B. Recovery machine
• C. Expansion valve
• D. Filter drier

Answer: (B)

The recovery machine is essential for the recovery of refrigerants because it is specifically designed to extract refrigerants from air conditioning and refrigeration systems. Recovery machines operate by using a compressor to draw refrigerant out of the system, collect it in a storage tank, and ensure that the refrigerant is recovered safely and efficiently without releasing it into the atmosphere. This is critical for environmental protection and compliance with regulations, as improper handling of refrigerants can contribute to ozone depletion and global warming.

While other equipment, like compressors, expansion valves, and filter driers, play important roles in the operation of HVAC systems, they do not serve the primary purpose of recovering refrigerants. Compressors are used to circulate refrigerant through the system, expansion valves control the flow of refrigerant, and filter driers remove moisture and contaminants from the refrigerant. However, they are not used for the process of recovering refrigerants, making the recovery machine a specific and necessary tool for this task.