What does a passive system-dependent recovery device for small appliances do?

A passive system-dependent recovery device for small appliances is designed to capture refrigerant from the appliance into a non-pressurized container. This type of recovery device relies on the pressure within the system to facilitate the transfer of refrigerant. It does not require external power to function, which makes it convenient for use with smaller appliances.

The process involves connecting the device to the appliance, allowing the refrigerant to flow into the container as the system depressurizes. This method emphasizes the importance of maintaining responsible refrigerant management by preventing any release into the atmosphere, which aligns with environmental regulations. Utilizing a non-pressurized container is significant because it ensures the storage of the recovered refrigerant without the risks associated with handling high-pressure systems.

In the context of the other options, releasing refrigerant into the atmosphere is not compliant with EPA regulations, while operating with a compressor or requiring external power would indicate a different type of recovery device, such as an active recovery system. Thus, the focus on a passive, system-dependent nature confirms that the primary function is to safely capture refrigerant without additional power sources or compressor involvement.