Pentair FLECK 9000 SXT, Installer Manual, Page: 24 / 118

Installer manual Fleck 9000 SXT - Description
24 / 118 Ref. MKT-IM-020 / C - 21.11.2019
3.6.2 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 against sodium ions. The water is conditioned as it passes through
the resin bed.
Brine draw & slow rinse — cycle C1
The controller 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 C2
The flow of water is reversed by the valve and directed down through 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 C3
The controller 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 recompacted.
Brine tank refill — cycle C4
Water is directed to the brine tank, at a rate controlled by the refill controller [BLFC], 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.