What is the purpose of a high-pressure cut-out control on a recovery unit?

A high-pressure cut-out control plays a crucial role in ensuring the safety and proper functioning of a refrigerant recovery unit. Its primary purpose is to protect the system from excessive pressures that could potentially cause damage to the equipment or create hazardous conditions. By shutting down the compressor when the pressure exceeds a predetermined level, this control prevents any risk associated with over-pressurization, such as ruptures or leaks.

The other options may relate to relevant aspects of cooling systems or recovery units but do not describe the main function of the high-pressure cut-out control. Monitoring refrigerant levels is not the role of this control; rather, it's focused on pressure levels. While preventing compressor overheating is important, that function is typically managed through separate thermal protections. Optimizing recovery efficiency, while beneficial for system performance, is not the primary goal of a high-pressure cut-out, which is centered around safety and pressure regulation.