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Pentair Autotrol 255 - Regeneration Sequence for Twin and Lockout Systems; Twin alternating systems

Pentair Autotrol 255
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Installer Manual 255/LOGIX 742-762-764 - Description
Ref. MKT-IM-021 / A - 20.02.2019 21 / 92
3.6. Regeneration Sequence for Twin and Lockout Systems
Note
Perform a first regeneration for each tank, it will synchronize the camshafts if not already
synchronized.
Note
When you fill water in the system, repeat operations described on chapter 7.1. Water filling,
draining and watertightness inspection, page 58, for each tank.
3.6.1. Twin alternating systems
In this example, tank 1 is in stand-by position whereas tank 2 is in service position.
When an immediate regeneration is initiated, tank 2 stay in service whereas tank 1 moves to C5, C6,
C7, C8 and to the service position.
Once tank 1 reaches the service position, tank 2 moves to C1, C2, C3, C4 and to stand-by position.
Cycles repeat themselves so on.
Stand-by
Tank 1 Tank 2
C5
C6
C7
C8
C1
C2
C3
C4
When an immediate regeneration is initiated,
Tank 2 stay in service whereas tank 1 moves to:
Once Tank 1 has reached the service position,
Tank 2 moves to:
Service

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