Pentair Autotrol 255 Installer Manual page 65

• P16 = 2, immediate regeneration - fixed reserve/delayed regeneration - variable reserve:
This option uses the features of both options P16 = 0 and P16 = 3. This is the most versatile of
regeneration options. Option P16 = 2 provides all the advantages of variable reserve based on the
actual amount of water that is used each day plus the capacity to react to the excessive water usage
days that occur occasionally (see table below);
Priority
High
Average
Low
Table with P16 = 2
• P16 = 3, immediate regeneration - fixed reserve:
Regenerations are started immediately when a tank reaches zero or when the system remaining
capacity in both tanks drops below the reserve capacity programmed in P17. To prevent hard water
this reserve should be set large enough to provide conditioned water during the regeneration of the
most exhausted tank (see table below).
Priority
High
Average
Low
Table with P16 = 3
Ref. MKT-IM-021 / A - 20.02.2019
Installer Manual 255/LOGIX 742-762-764 - Operation
Flow rate Continuous soft water
x
Flow rate Continuous soft water
x
Efficiency
x
Efficiency
x
x
x
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