Pentair SIATA V132-SFE-EV-VIRIDION, Installer Manual

Page: 20 / 110

Installer Manual Siata V132-SFE-EV-VIRIDION - Description
20 / 110 Ref. MKT-IM-009 / C - 08.06.2018
3.5. 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 raw water being exchanged on the resin
beads against sodium ions. The water is conditioned as it passes through the resin bed.
Backwash — cycle C1
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.
Brine draw— cycle C2
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 displaced 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 — cycle C3
The slow rinse cycle allows the brine to be slowly pushed into the resin bed, enabling regeneration of
the resin.
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 recompacted.
Tank refill — cycle C5
The SFE-EV-VIRIDION timer automatically calculate the refill cycle duration. Water is directed to the
brine tank, though the 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.
Note

Depending on controller programming (see 6.4.3. Advanced programming, variables:
Variable brining function & “BLFC size”, page 62), the refill cycle is performed before the
regeneration start, in this case refill is indicated as cycle 1B or after the cycle 4C, in this case
is indicated as cycle 5C.

In case refill is performed before the regeneration, after the 1B cycle is completed, the
controller & the valve will be still in service for a relative short time in order to wait the
necessary time to dissolve the salt in the refilled water.