Pentair FLECK 3900 NXT - Page 49

Installer Manual Fleck 3900 - NXT - Installation
Ref. MKT-IM-015 / B - 08.06.2018 49 / 126
4. Total flow rate demand increased past a second trip point programmed rate. The second and
third tank (least volume remaining) changes from standby to service. The total flow is split
between three meters.
5. The third tank returns to standby as demand decreases past the second trip point.
Flow split between three meters
Valve
Tank
Inlet
Outlet
Stand-By
Meter
Check valve
ServiceService Service
Flow split between
two meters
Valve
Tank
Inlet
Outlet
Stand-By
Meter
Check valve
Stand-ByServiceFirst trip
point
(primary
tank)