What must not be mixed in a refrigerant system?

In a refrigerant system, it is crucial that refrigerants with different designations are not mixed. Each refrigerant type is designed with specific thermodynamic properties, pressures, and chemical characteristics that allow it to function effectively within a system. Mixing refrigerants of different designations can lead to unpredictable behaviors, inefficiencies, and potential system damage due to incompatible properties.

When refrigerants are mixed, it can result in altered pressure levels, reduced effectiveness in heat transfer, and difficulties in service and recovery, which may pose safety hazards. For instance, mixing different refrigerants could also violate applicable regulations and affect system warranties or lead to non-compliance with environmental standards.

Choosing refrigerants with compatible properties is essential for ensuring optimal performance and longevity of the refrigeration system. Therefore, the integrity of the refrigerant system relies on using a single type of refrigerant with the same designation to maintain its designed efficiency and operational safety.