System Operation; Cycle Water Flows - Autotrol Logix 764 Operation Manual

System Operation

Treated Water (Downflow)
Untreated water is conditioned as it flows through
the resin bed and up the riser.
Backwash (Upflow) – Cycle C1
Flow is reversed by the control valve, directed
down the riser, up through the resin bed and sent
to drain. 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.

Cycle Water Flows

Service Backwash
1. The camshaft does not change position between the C2 and C3 cycles. C3 is not displayed.
1
1
From Regenerant
Tank
Regenerant Draw/ Repressurize
Slow Rinse
13
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.
nd
2 Backwash (Upflow) - Cycle C6
Flow is identical to C1 Backwash. The resin is
reclassified.
nd
2 Rinse (Downflow) - Cycle C7
Flow is identical to C5 Fast Rinse. The resin bed is
rinsed to quality.
Regenerant Refill – Cycle C8
Water is directed to the regenerant tank to create
regenerant for the next regeneration.
Fast Rinse
To Regenerant
Tank
Refill