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Installer manual Fleck 3150 NXT/NXT2 - Description
3.5.2
Upflow regeneration cycle (5-cycles operation)
Service — normal use
Untreated water is directed down through the resin bed and up through the riser tube. The
hardness ions attach themselves to the resin and are removed from the raw water being
exchanged on the resin beads by sodium ions. The water is conditioned as it passes through the
resin bed.
Pause & Delay — cycle C1
The valve is in stand-by until the end of the cycle. In multiplex, if the brine tank is shared, allows to
leave a brine preparation time.
Info
The cycle Pause & Delay is optional with NXT controller. The factory value is set to
0 minute.
Brine draw & slow rinse — cycles C2
The valve directs water through the brine injector and brine is drawn from the brine tank. The
brine is then directed down through the riser tube and up through the resin bed to the drain. The
hardness ions are replaced by sodium ions and are sent to the drain. The resin is regenerated
during the brine cycle. Then the slow rinse phase starts.
Backwash — cycle C3
The flow of water is reversed by the valve and directed down the riser tube and up through the
resin bed. During the backwash cycle, the bed is expanded and debris is flushed to the drain, while
the media bed is remixed.
Rapid rinse — cycle C4
The valve directs water down through the resin bed and up through the riser tube to the drain. Any
residual brine is rinsed from the resin bed, while the media bed is re-compacted.
Brine tank refill — cycle C5
Water is directed to the brine tank, at a rate controlled by the refill controller, to create brine for
the next regeneration. During brine refill, treated water is already available at the valve outlet.
Info
For illustration purpose only.
Always verify inlet and outlet marking on the valve.
28 / 190
Ref. MKT-IM-010 / F - 16.01.2023
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