Pentair Fleck 3150 NXT Installer Manual page 3

4.2 Sizing a softener (single unit) ..................................................................... 33
4.2.1 Parameters to be considered .............................................................................
4.2.2 Determining the required volume of resin .........................................................
4.2.3 Resin exchange capacity and capacity of the unit ..............................................
4.2.4 Valve configuration..............................................................................................
4.2.5 Cycle time calculation.........................................................................................
4.3 Salt amount definition................................................................................. 40
4.4 Injector flow rates ....................................................................................... 40
4.4.1 1800 Injector flow rates ......................................................................................
5 Installation ...................................................................................... 43
5.1 Warnings ..................................................................................................... 43
5.2 Safety notices for installation ..................................................................... 43
5.3 Installation environement........................................................................... 43
5.3.1 General ................................................................................................................
5.3.2 Water ...................................................................................................................
5.3.3 Electrical .............................................................................................................
5.3.4 Mechanical ..........................................................................................................
5.4 Integration constraints ............................................................................... 45
5.5 Block diagram and configuration example ................................................ 47
5.6 Valve on tank assembly .............................................................................. 48
5.7 Valve connection to piping .......................................................................... 49
5.7.1 Top-mounted valve installation ..........................................................................
5.7.2 Side-mounted valve installation .........................................................................
5.8 Regeneration flows ..................................................................................... 53
5.8.1 Single valve (System 4) .......................................................................................
5.8.2 Multiple valves, parallel interlock system (System 5) .......................................
5.8.3 Multiple valves, parallel series regeneration system (System 6)......................
5.8.4 Duplex alternating immediate system (System 7) .............................................
5.8.5 Duplex alternating delayed system (System 8) (NXT2 only)...............................
5.8.6 Multiple valves, parallel system with standby unit (System 9) ..........................
5.8.7 Multiple valves, system on-demand (System 14) ...............................................
5.9 Electrical connections ................................................................................ 61
5.9.1 NXT controller connections ................................................................................
5.9.2 NXT2 controller connections ..............................................................................
5.9.3 NXT controller connections for multiple valves .................................................
5.9.4 NXT2 controller connections for multiple valves ...............................................
5.10 Bypassing .................................................................................................... 66
5.11 Drain line connection .................................................................................. 66
5.12 Overflow line connection............................................................................. 67
5.13 Brine line connection .................................................................................. 68
6 Programming .................................................................................. 69
6.1 NXT controller............................................................................................. 69
Ref. MKT-IM-010 / F - 16.01.2023
Installer manual Fleck 3150 NXT/NXT2 - Table of Contents
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