15
System regeneration cycle (5-cycle 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 untreated water being
exchanged on the resin beds by sodium ions. The water is conditioned as it passes through the
resin bed.
Backwash
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.
Brine draw
The controller directs water through the brine injector and brine is drawn from the brine tank. The
brine is then directed down through the resin bed and up through the riser tube 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.
Slow rinse
The slow rinse cycle allows the brine to be slowly pushed into the resin bed, enabling regeneration
of the resin.
Rapid rinse
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.
Tank refill
The ECO GREEN controller automatically calculates the duration of the refill cycle. Water is
directed to the brine tank, through the brine valve [BV], at a flow 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.
In ECO FVT models, refilling is manually set during the programming phase.
