Pentair SFE Manual Del Usuario página 34

S F E
Note 1: calculation of number of regenerations before a salt alarm is generated.
The following formula is used to calculate the number of regenerations before a salt alarm is generated:
SA = (M.xxx) * 1000
where:
M.xxx: amount (in kg) of salt found in the brine tank;
L.xxx: volume of resin, expressed in litres (l);
G.xxx: amount of salt (in grams) required to regenerate 1 litre of resin, (g/l).
The result of the formula gives the number of regenerations before generating a salt alarm and must be
typed, rounded down to the closest integer (for example 15.4 must be rounded to 15), in the advanced
menu.
Note 2: calculation of the volume of treatable water between two
regenerations.
The following formula is used to calculate the volume of treatable water (in litres) between two subsequent
regenerations:
where:
d.xxx: incoming water hardness, in French degrees (°f);
do.xx: desired outgoing water hardness, in French degrees (°f);
C:xx: exchange capacity of the regenerating resin used (expressed in °f x m3/l or in grams of CaCO3);
L.xxx: volume of resin, expressed in litres (l).
The result of the formula gives the volume of treatable water (in litres) between two regenerations and
must be typed, rounded down to the closest integer (for example 34.6 litres must be rounded to 34 litres),
in the advanced menu.
Note that the desired outgoing water hardness value must be compatible with the
provisions of the regulations in force where the controller is used.
SA = (M.xxx) * 1000
(L.xxx) x (G.xxx)
= (L.xxx) x (C.xx) x 1000
V
treatable-water
(d.xxx - do.xx)
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