What is the required setting for an automatic relief valve installed with a fire pump?

The required setting for an automatic relief valve installed with a fire pump is to be adjusted to a shutoff minimum pressure. This setting ensures that the valve will relieve pressure automatically when the pump reaches a predetermined shutoff pressure, which is crucial for preventing overpressure conditions that could damage the system.

In fire protection systems, maintaining appropriate pressure levels is vital for both the safety and effectiveness of the fire pump operation. The shutoff minimum setting allows the system to respond appropriately when the pump is not engaged in producing flow, ensuring that excessive pressure does not build up in the system. By doing so, it helps maintain operational integrity and prevents potential failures that could affect fire suppression capabilities.

Other settings, such as flow minimum or net minimum, pertain to different operational contexts and do not specifically address the shutoff conditions necessary for the fire pump and its associated relief valve. Thus, the shutoff minimum setting is the correct choice for ensuring safety and functionality in a fire protection system.