Pentair FLECK 3150 NXT, Installer Manual

Page: 45 / 182

Installer manual Fleck 3150 NXT/NXT2 - Installation
Ref. MKT-IM-010 / C - 18.10.2019 45 / 182
Remote regen start:
The controller initiates the regeneration when an external dry signal is acquired on the
S2 terminal (see Electrical connections [
} Page 52], signal must last at least the
programmed signal duration).
For NXT2 controller only
Day of the week
The controller initiates the regeneration at the programmed regeneration time on
preset day(s) of the week.
5.7.1 Single valve (System #4)
As named, this system works with only one valve. The regen can be initiated upon the
treated volume (delayed or immediate), time clock mode or an external remote regen
signal or day of week (NXT2 controller only).
Inlet
Meter
Valve
Outlet
Tank
5.7.2 Multiple valves, parallel interlock system (System #5)
This system type may be used to build systems from 2 to 4 valves for NXT controller,
2 to 8 valves forNXT2. Each valve must be equipped with a water meter.
All tanks in parallel are supplying treated water. Each unit in the system has its own
flow meter. The controller will delay the start of regeneration if another unit is already
regenerating. Once that unit has completed a regeneration cycle and returned to
service, the unit with longest regeneration queue time will begin regeneration. Only one
unit regenerates at the time. Automatic regeneration may be triggered by either
volumetric mean or external dry contact.