Conel CLEAR Serie Montage- Und Betriebsanleitung Seite 71

Press <OK> and then
Press <OK>. The display will show the following:

By pressing the residual hardness is decreased and by pressing
The increment is 1 °dH.
The set value of the residual hardness is saved by pressing <OK>.
The adjustment of the newly set residual hardness is automatically performed during system operation.
For this purpose, approx. 10 litres of water must pass through the water softener (with approx. 500 l/h
flow rate).
Residual hardness can be checked using a hardness measuring equipment (included in delivery). The test
water for checking water hardness may be taken from the bypass valve or from any water tap downstream
of the water softener.
Ensure that the readjusted mixed water is supplied from the water softener to the tapping point. For a cor-
rect comparison of measured values, the samples should be taken at normal flow rate (when the tap is fully
open). During sampling, no larger amount of water may be taken from another tapping point.
6.3.2
LIMITATIONS FOR RESIDUAL HARDNESS
SETTINGS
The water softener control unit checks reliability of the residual hardness settings.
1. Restriction through control range of the blending valve
At a maximum, residual hardness must be about half the value of raw water hardness. Higher residual
hardness can not be achieved using the blending valve.
When setting the residual hardness in the menu, the value can be increased only up to the value which was
calculated by the control. Higher values are not offered.
2. Restriction through limit value for sodium in drinking water
The softening increases the sodium concentration in the mixed water, depending on the raw water hard-
ness and the mixed water hardness set.
In Germany in accordance with the current drinking water regulations the limit value for sodium in drink-
ing 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. Values may vary in other countries, please
consult your local regulations.

. The display will show the following:
Setting
· Res. hard.
Res. hard.
8 °dH

increased.
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