Multiple Valves, System On-Demand (System 14) - Pentair Fleck 3150 NXT Installer Manual

Inlet
Valve
Tank
Service
5.8.7

Multiple valves, system on-demand (System 14)

This system type may be used to build systems from 2 to 4 valves for NXT controller, 2 to 8 valves
for NXT2. Each valve must be equipped with a water meter.
The number of tanks in service depends on the flow rate and on programmed settings.
5.8.7.1 Examples of a four units system
1. One tank is in service at all time (the "primary tank").
Inlet
Valve
Tank
Service
Primary
tank
2. The total flow rate to the primary tank increases and exceeds the first programmed trip point.
The flow rate demand stays above the trip point for the preset delay time. The next tank (with
the least remaining volume) changes from standby into service. This then splits the total flow
between two meters.
Ref. MKT-IM-010 / F - 16.01.2023
Service Service
Stand-By Stand-By
Installer manual Fleck 3150 NXT/NXT2 - Installation
Outlet
Check valve
Stand-By
100%
Meter
Outlet
Check valve
Stand-By
Meter
57 / 190