REGENERATION MODES FOR PARALLEL
SYSTEMS
Parameter P16 is used to determine the method for demand
initiated regeneration. Four regeneration modes are possible.
•
P16 = 0: Delayed Regeneration with a Smart Reserve
Regenerations will start only at the time of regeneration
entered in P2. A tank is regenerated if the capacity
remaining in that tank is below the minimum required
capacity needed to meet the next day's calculated
water usage requirement. The next day's water usage
number is based on the daily average water usage held
in memory plus a 20% reserve. If necessary, both tanks
will be regenerated sequentially, beginning with the
most exhausted tank.
This option allows the control to vary the reserve, and
therefore the decision to regenerate, based on the
actual daily water usage pattern for the location at
which it is installed. See Table 7.
•
P16 = 1: Delayed Regeneration with a Fixed Reserve
Regenerations will start only at the time of regeneration
entered in P2. A tank is regenerated if the capacity
remaining in that tank is below the percentage entered
in P17.
If either tank's capacity is overrun by 50% a
regeneration will take place. The control will also cause
both tanks to be regenerated sequentially, the next
time of regeneration regardless of how much water is
used during that 24 hour period. This feature is to help
recover a severely exhausted bed. See Table 8.
•
P16 = 2: Immediate Regeneration - Fixed Reserve /
Delayed Regeneration - Smart Reserve
This option uses the features of both option 0 and
option 3. This is the most versatile of regeneration
options. Option number 2 provides all the advantages of
variable reserve based on the actual amount of water
that is used each day plus the capability to react to the
excessive water usage days that occur occasionally. See
Table 9.
•
P16 = 3: Immediate Regeneration - Fixed Reserve
Regenerations are started immediately when a tank
reaches zero or when the system capacity remaining
(capacity remaining 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 10.
Table 6 P16 = 0
Priority
Flow Rate
Continuous
Soft Water
Efficiency
High
•
Average
•
•
Low
Table 7 P16 = 1
Priority
Flow Rate
Continuous
Soft Water
Efficiency
High
•
Average
•
Low
•
Table 8 P16 = 2
Priority
Flow Rate
Continuous
Soft Water
Efficiency
High
•
Average
•
•
Low
Table 9 P16 = 3
Priority
Flow Rate
Continuous
Soft Water
Efficiency
High
•
•
Average
Low
•
22
•
AUTOTROL
®
Logix 764 Control Performa Cv Series Valves (273, 278) Service Manual
