Up Flow Regeneration Cycle (5-Cycles Operation) - Pentair FLECK 9100 SXT Installer Manual

Installer Manual Fleck 9100 - SXT - Description

3.4.2. Up flow 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 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.
20 / 94 Ref. MKT-IM-004 / A - 27.10.2016