System Operation; Cycle Water Flows - Pentair Pro Elite Professional Series Operation Manual

System Operation

Treated Water (Downflow)
Untreated water is conditioned as it flows through the
resin bed and up the riser.
If the model selected at first start-up was 268r, this
is a system that will refill the salt tank at the start of a
regeneration cycle. When a regeneration cycle begins,
the salt tank is filled and brine is allowed to develop
before Cycle 1 starts.
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
14 • PENTAIR Pro Elite Professional Series Pro Elite Demand Instruction Manual
Regenerant Tank
Regenerant Draw/
Backwash
Slow Rinse
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
Refill last only occurs if the model selected at first power
up was 268.
Water is directed to the regenerant tank to create
regenerant for the next regeneration.
From
Repressurize
Refill
Fast Rinse
To Regenerant
Tank