Manufacturers recommend pressurizing VRF piping to what pressure for leak testing?

For leak testing VRF (Variable Refrigerant Flow) piping, manufacturers typically recommend a pressure range that ensures the integrity of the system while minimizing the risk of damage. The correct pressure for testing, which is commonly set between 500 to 600 psig, is considered adequate to detect any potential leaks that might occur in the piping.

Pressurizing the system within this range allows for a thorough evaluation of the joints and connections without exceeding limits that might lead to structural risks or compromise the system's components. It is important that the pressure is sufficiently high to reveal any weak points that may not be detectable at lower pressures, thus safeguarding the operational reliability of the VRF system before it is put into service.

In contrast, pressures outside this specified range, such as those suggested in the other options, may either be too high, risking damage to the piping, or too low, failing to sufficiently test for leaks. Always refer to manufacturer recommendations to ensure compliance with safety standards and effective leak detection during the installation process.