JUDO QUICKSOFT-UNO 15
Operation
5.1.2 Setting the blending
In the factory the setting screw (10) is set to
the “Soft” position. You first have to check
what the mixed water hardness is with this
setting. The water hardness is measured us-
ing measuring equipment (see chapter on
“Accessories”).
The sample water for measurement and ad-
justment of the water hardness can be
drawn off at the bypass valve or at a water
tap downstream of the Softener (see chap-
ter on “Accessories”).
Ensure that the readjusted mixed water has
reached the drawing off point from the Sof-
tener. To correctly compare the measured
values, the samples should be taken from a
normal water flow (1 tap fully opened). Dur-
ing the drawing off no large water quantities
may be drawn off at any other point.
If the required mixed water hardness has
still not been reached, it can be achieved by
turning the blending (10). Recommended
hardness is approx. 10°e.
The setting may have to be changed and re-
measured several times before the required
value is reached.
The softening increases the sodium concen-
tration in the mixed water, depending on the
raw water hardness and the mixed water
hardness set.
In accordance with the Drinking Water Reg-
ulations of 1.1.2003 the limit value for sodi-
um in drinking water is 200 mg/l. This does
not apply to mineral and table water. Their
limit values are considerably higher, some
have values above 1000 mg of sodium per
litre.
If the calculated total sodium content ex-
ceeds the value permitted under the Drink-
ing Water Regulations of 200 mg/l, it can be
corrected by increasing the mixed water
hardness accordingly. The sodium content
must be recalculated.
Softer mixed
water
= turn in clockwise di-
rection
Harder mixed
water
= turn in anti-clock-
wise direction
Calculating the sodium content
°e Raw water hardness (ask the
waterworks or measure with a
hardness test device)
- °e Mixed water hardness (meas-
ured value)
= °e Water hardness
x
6.4 mg Na
+
/l x °e
Na-Ionen-exchange value
= mg/l Na ion exchange value Increase
in sodium content due to soften-
ing.
+ 10mg/l Sodium already in the raw water
(ask the waterworks)
= mg/l Total sodium content in mixed
water
Tab. 1: Calculating the sodium content
Example calculation of the sodium con-
tent
25 °e Raw water hardness
- 10 °e Mixed water hardness
= 15 °e Water hardness
x 6.4
= 96 mg/l Due to softening
+ 10 mg/l From waterworks
= 106 mg/l Total
Tab. 2: Example calculation of the sodium content
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