The MPE 322 is designed to control water circulation in primary hot water and central heating circuits, by diverting flow to either circuit or to both simultaneously using a single valve.
For convenience the two neon indicator lights illuminate indicating which port is open.
When the manual lever is moved to the right, ports A and B are open, this is used when filling, venting or draining the system. The spring return, Mid-Position actuator – valve rests in the hot water only position.