Variable Brining Option; Number Of People" Setting; Holiday Function - Pentair Water SFE-EV Manual De Uso Y Mantenimiento

S F E - E V
4.4.3

Variable brining option

The variable brining function is designed to save water and salt by optimising the brine to be used for resin
regeneration when the controller is set up for a volumetric delayed mode (see section 5.3 for more information
on programming of this option).
This function requires that the brine for regeneration is prepared just before the regeneration cycle so that the
controller takes into account the effective water volume that has been treated compared to the total volume
capacity, and based on this value, it calculates the percentage of exhaustion of the resin bed before starting
the regeneration.
As a result the regeneration will in that case always start by the refill cycle. The quantity of water to refill will
be automatically calculated by the controller and adjusted by the percentage of exhaustion of the resin bed so
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that only the required volume of brine is prepared. As an example we can assume that the controller has
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exhausted 70 % of the resin bed before starting the regeneration, in that case it calculates the theoretical
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amount of water needed to prepare brine for a complete regeneration and multiply this value by 0.7. As a
L result the 30% of brine can be saved.
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The percentage of brine saved for each regeneration can be displayed in the diagnostic mode of the controller.
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See section 6 for more information.
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Using this feature with volumetric immediate mode for regeneration will not allow to save water and salt since
the regeneration will be done only when 100% of the resin is exhausted.
4.4.4

"Number of people" setting:

When programming the SFE EV controller for a volumetric control mode, then in addition to the calendar
override function (See section 5.3 for more information), it is also possible to set up a maximum interval
between 2 regenerations by taking into account the number of users and the daily water requirement
associated with each user. This maximum interval between 2 regeneraton is then calculated by the controller
based upon the number of people, the daily water consumption per person and the total treatable volume that
is calculated by the controller based upon the programmed system parameters.
4.4.5

Holiday function

When programming the SFE EV for a volumetric control mode, then you can also activate the "Holiday
function". This feature will place the system in a hibernation state after a predetermined number of day
without any water consumption that you program in the advanced menu (See section 5.3 for more
information). This means that no regeneration based upon calendar override or external signal can be started.
When the feature is activated in the advance programming menu (see section 5.3), then when there is no water
consumption during the programmed number of day, the controller will perfom a complete regeneration cycle
and will place the system in stand by. The controller will then alternatively display "HOL" and the treatable
volume of water.
As soon as water consumption is detected by the controller (pulses from the meter), then the SFE-EV will
perform a fast rinse of the resin bed and will schedule a complete regeneration cycle at the next regeneration
time. If the variable brining option is activated, the brine tank will be filled 3 hrs before the regeneration as
usual.
ATTENTION. Pentair Water nevertheless recommends fixing the day override parameter in
accordance with the local standards.
The number of users can only be programmed when regenerating by volume.
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