What is essential to check when converting a system from R-22 to R-410A?

When converting a system from R-22 to R-410A, it is crucial to check the refrigerant type compatibility because R-410A has different properties compared to R-22, which impacts system design and operation. R-410A operates at a higher pressure than R-22, so the entire refrigeration system—including components such as the compressor, evaporator, condenser, and the piping—must be able to handle these pressures. Additionally, the lubricants used in the system need to be compatible with R-410A, which often requires the use of POE (polyolester) oils instead of the mineral oils commonly used with R-22. Ensuring compatibility is vital to prevent equipment failure, inefficiency, and safety hazards due to the high pressures and specific requirements of R-410A.

While checking the power supply voltage, thermal expansion valve type, and condenser size are important aspects of a system’s conversion or retrofit process, they are secondary to verifying refrigerant compatibility. Ensuring that the system is designed to work with R-410A is the foundational step that dictates what other modifications or checks may be necessary.