Boost-a-Main - How it works
- Mains water enters via the combined inlet valve & 400micron strainer (a) and passes in two directions to the double check non return valves (b).
- Some of the water passes valve (b1) in the direction of the pump (d). The pump raises the pressure of the water from the available inlet pressure to 8 Bar and fills the accumulator (h).
- The pressure sensor (e) switches the pump on whenever water pressure in the high pressure section of the equipment ( between (b1) (b2) and (i)) falls close to or below the desired service pressure (normally 3.8 Bar).
- The Pressure sensor (e) switches the pump off when the pressure in the high pressure section reaches the desired maximum pressure (normally 8 Bar to optimise the accumulator (h) capacity).
- Mains water also passes the double check valve (b2) and assists in filling the accumulator (h) up to the maximum mains feed pressure available, this minimises the pump workload and provides an automatic fail safe situation in the event that either the pump or the accumulator fails.
- Water is then provided to service the demands of the dwelling via the pressure limiting valve (i) set at a suitable pressure for the required usage usually 3.5 Bar
- The control box (g) controls the pump using the pressure information from the pressure sensor (e) Additionally the control box measures feed line pressure via low pressure sensor (c) and switches the pump off if the feed line pressure drops below a pre-set minimum (usually .25 bar) providing run dry protection and preventing any possible vacuum in the mains water feed line. A low pressure failure will automatically re-set when pressure is restored.
- Additionally the control box will shut down the pump system & require a manual reset if water pressure exceeds safety upper limits (normally 9 bar). This is measured independently using the high limit sensor (f ) pressure in the high pressure part of the system is displayed on control box display (g).
- Valve (j) is the outlet isolation valve.
