Where must an operating pressure control be connected in a boiler system?

The operating pressure control in a boiler system is typically connected to the highest part of the steam side. This is crucial because the pressure in a steam system varies with elevation; the higher the steam, the more accurate the pressure readout will be. By connecting the control to this location, the instrumentation can measure the steam pressure at its peak, ensuring that the system operates within the intended safety and performance parameters.

Additionally, having the pressure control connected to the highest point prevents the possibility of condensation or water carryover affecting the pressure readings. This connection allows for effective monitoring and control of the steam pressure, facilitating better management of the boiler’s efficiency and safety.

Connecting the pressure control to the lowest part of the steam side, the feedwater inlet, or the combustion chamber would not yield accurate or reliable measurements necessary for effective boiler operation and could lead to poor performance or safety issues.