SYSTEM SPECIFICATIONS
System Regeneration Cycles
1. Service (Downflow) — Cycle C0:
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 water. The water is
conditioned as it passes through the resin bed.
2. 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.
3. Brine/Slow Rinse (Downflow) — Cycles C2, C3:
The control directs water through the brine injector and brine
is drawn from the regenerant 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. Brine draw is completed when the air check closes.
4. Repressurize Cycle — (Hard Water Bypass Flapper
Open), Cycle C4:
This cycle closes the flappers for a short time to allow the
air and water to hydraulically balance in the valve before
continuing the regeneration.
5. Fast Rinse (Downflow) — Cycles C5:
The control directs water down through the resin bed and
up through the riser tube to the drain. Any remaining brine
residual is rinsed from the resin bed.
6. Brine Refill — Cycle C8:
Brine refill occurs during a portion of the fast rinse cycle.
Water is directed to the regenerant tank at a controlled rate, to
create brine for the next regeneration.
SERVICE
BACKWASH
BRINE/SLOW RINSE
FAST RINSE
From Regenerant
Tank
To Regenerant
Tank
BRINE REFILL
REPRESSURIZE
C0
C1
C2 and C3
C4
C5
C8
Figure 14
Controller Location
The 700 Series controllers are designed to be mounted on
the valve or attached to a flat surface. Installations that do
not provide easy access to the valve can have the controller
mounted for remote operation.
A remote mount connection, P/N 1256257, is available for the
700 Series controller.
Valve Camshaft
The front end of the camshaft has an indicator cup. The cup
has slots in the outer periphery and numbers on the inside
face (Figure 15).
The numbers can be seen with the cover off, from the front
over the top of the controller. The number at the top indicates
which regeneration cycle is currently in progress.
Treated Water Slot
Treated Water Indicator
(normal operation)
Figure 15 Camshaft Front End for 273 and 278 valve bodies
The corresponding slot for the number is positioned at the
optical sensor which is approximately 90 degrees out of phase.
Regeneration Cycle Indicators
C0 = Treated Water - normal operation mode
C1 = Backwash Cycle
C2 = Regenerant Draw Cycle (not used in filter mode)
C3 = Slow Rinse Cycle (not used in filter mode)
C4 = System Pause
C5 = Fast Rinse Cycle
C8 = Regenerant Refill (not used in filter mode)
Valve Disc Operation
1 Regenerant
3 Inlet
4 Outlet
2 Bypass
6 Rinse Drain
7 Backwash/Drain
5 Refill
Figure 16 - Performa Valve (273, 278)
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AUTOTROL
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Logix 764 Control Performa Cv Series Valves (273, 278) Service Manual
