What is the primary concern regarding the installation of the safety valve in relation to the boiler?

The primary concern regarding the installation of the safety valve in relation to the boiler is to minimize the length of piping. This is crucial because excessive lengths of piping can introduce potential issues such as increased pressure drops and the possibility of the safety valve being less responsive. The safety valve needs to operate effectively and quickly to relieve pressure in case of overpressure conditions within the boiler. A shorter piping distance ensures that the valve can respond swiftly to changes in pressure without being impeded by long runs, which could delay its operation.

Accessibility for maintenance is important, but it does not directly relate to the immediate operational efficiency of the safety valve. While having a manual override or a digital readout can enhance the system's usability or monitoring capabilities, the most critical factor for the safety valve's performance is ensuring it can function optimally in emergency situations, which is best achieved by minimizing the length of piping.