Download AS20150-180 Serial No

DETERMINING FREQUENCY OF REGENERATION
After locating and installing the brine tank in the required position, it is necessary to
know whether a wet or dry salt system is to be used. This is done by calculation as
follows:NOTE:
Less salt is required to regenerate a partially exhausted bed per gram of
hardness removed, than that required for a more exhausted bed. For
economy sake regenerate before full exhaustion.
Calculate time between regenerations thus:C
-----------
=
N
HxQ
Where
C
=
maximum capacity of unit as grams of CaCO3
(Refer Table 2)
H
=
hardness of water a mg/l or ppm.
Q
=
amount of water passed through the unit in kilolitres per
day.
N
=
maximum time between regenerations in days.
The calculated value of N should be taken down to the nearest whole number. This
is the maximum number of days which can be achieved between regenerations.
The amount of salt needed per regeneration, is calculated thus:Total hardness removed (Exchange Capacity Required) = N x H x Q = A
Where A = the total hardness removed as grams of CaCO3
The salt dosage for the exchange capacity required is found in Table 2.
AS20150-180
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