Aerus Origins WC300, Operation Manual

Page: 15 / 68

15
System Operation
Service (Downflow)
Untreated water is directed down through the resin bed and up
through the riser tube. The water is conditioned as it passes
through the resin bed.
Backwash (Upflow) – Cycle C1
The flow of water is reversed by the control 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.
Regenerant Draw (Downflow) – Cycle C2*
Water passes through the injector and regenerant is drawn from
the regenerant tank. The regenerant is directed to the resin bed.
The hardness ions are displaced by sodium ions. Regenerant draw
is completed when the air check closes.
Slow Rinse (Downflow) – Cycle C3*
Water flow moves the regenerant through the resin at a specific
rate and rinses to the drain. The resin is regenerated.
Repressurization – Cycle C4
Pressure is balanced in the valve before continuing the
regeneration.
Fast Rinse (Downflow) – Cycle C5
Water passes through the resin bed and up through the riser to
drain. All remaining regenerant residual is rinsed from the resin
bed.
2nd Backwash (Upflow) – Cycle C6
Flow is identical to C1 Backwash. The resin is reclassified.
2nd Rinse (Downflow) – Cycle C7
Flow is identical to C5 Fast Rinse. The resin bed is rinsed to
quality.
Regenerant Refill Last – Cycle C8
Water is directed to the regenerant tank to create regenerant for
the next regeneration.
Cycle Water Flows
Backwash Fast Rinse Service
Regenerant Draw/
Slow Rinse
From
Regenerant Tank
Repressurize
To Regenerant
Tank
Refill
Figure 16
* The camshaft does not change position between the C2 and C3
cycles. C2 is only momentarily displayed.