Judo QUICKSOFT MEGA, Operating Instructions Manual

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14 JUDO QUICKSOFT MEGA
Operation
5.5 Function description
5.5.1 Method of operation
The filter containers are filled with ion-ex-
change resin. This comprises small plastic
resin balls on which the calcium ions, which
make the water ‘hard’, are exchanged for
sodium ions. Consequently the water be-
comes soft. In the control head an adjusta-
ble quantity of not-softened raw water is ad-
mixed to obtain the desired mixing water
hardness downstream of the system. How-
ever the ion-exchange resin only absorbs a
limited quantity of these hardness compo-
nents. Dependent on the water hardness
and the treated water volume, sooner or lat-
er it is exhausted. The time at which it be-
comes exhausted is measured with the wa-
ter meter and regeneration automatically
triggered. To do so, diluted brine (sodium
chloride) is used to remove the hardness
components from the resin.
5.5.2 System design
The water softening system is designed as a
parallel system that is regenerated in two
stages. During regeneration, the two resin
containers are alternately responsible for
soft water provision. In this way soft water is
always available for the consumer, even
during regeneration.
5.5.3 Regeneration
With a very short regeneration period of
about 7.5 minutes per resin container (total:
15 minutes) high volume continuous draw-
ing is possible.
The soft water volume is precisely meas-
ured using a water meter in the system’s soft
water pipe and in this way triggering of re-
generation is controlled. Regeneration is
performed according to DIN EN 14743 and
DIN 19636-100 using miser salting. Disin-
fection of the system takes place at regular
intervals to prevent microbe contamination.
The small quantity of chlorine required for
this is created electrolytically during regen-
eration from the absorbed brine.
5.5.4 Control of regeneration
Regeneration is performed automatically via
wear-free ceramic disc valves. The regener-
ation sequence is fixed by the geometry of
the discs and therefore need not be re-en-
tered after a power failure.
5.5.5 Overflow valve
If because of very high drawing of water
(e.g. pressure washer) the pressure loss in
the water softening system is greater than
1.0 bar, then an overflow valve integrated in
the control head opens so that hard water
can bypass the system to limit the pressure
loss. This means that the residual hardness
temporarily increases in the pipe down-
stream of the water softening system.