When testing refrigerant systems, what is the minimum test pressure requirement?

The minimum test pressure requirement for refrigerant systems is based on the design pressure of the system. This is a critical standard established to ensure the integrity and safety of refrigerant systems during testing. By applying a test pressure that aligns with the design pressure, technicians can effectively verify that the system is capable of handling its intended operational pressures without leaks or failures.

Utilizing the design pressure ensures that the system is subjected to a thorough evaluation under conditions that mimic its real-world operational metrics, thus providing a reliable assessment of the system's durability and reliability. This practice helps maintain safety standards and prevents potential failures during use.

Other options, such as the setting of the pressure relief valve, atmospheric pressure, or maximum operational pressure, do not provide an adequate benchmark for testing integrity and might lead to an underestimation of the system's capabilities or safety concerns during operation.