WMF Cromargan BUENO Gebrauchsanweisung Seite 13

Calcification
Calcium deposits lead to a longer brewing time and a lower quality of your coffee. In addition, calcium
deposits lead to energy losses and affect the service life of the device.
It switches off prematurely if the limescale layer is too thick. It is then only possible to remove
with great difficulty. You should therefore descale regularly, at the latest however in the event of
significantly longer brewing times or increased noise.
The following data are guide values that refer to a daily use in the household.
Hardness range
1 soft
2 medium
3 hard
4 very hard
1° dH corresponds to approximately 0.18 mmol/l Ca and Mg ions
You can inquire at your local water company or government to find out the hardness range in your
neighbourhood.
Descaling agent
We recommend using Cromargol®. This is highly effective and gentle on
materials without additional reaction time.
You can also use a commercially available descaling agent that is suitable for filter
coffee machines.
The Cromargol® decalcifier is only available in Germany and Austria.
Do not use vinegar or vinegar concentrate, as this can damage materials in the
appliance.
When using descalers based on citric acids, precipitates could form during
descaling that seal the limescale layer or clog the lines in the device. In addition,
descaling with citric acid takes too long – a complete descaling can therefore not be
ensured.
Damage caused by the use of an unsuitable descaling agent or through non-
compliance with the descaling instructions is not covered by our warranty claim.
Handle the descaling agent carefully to ensure that no furniture or clothing is
damaged.
Hardness Descaling intervals
0 - 7° dH Every 6 months
>7- 14° dH Every 3 months
>14 - 21° dH Every 6 weeks
>21° dH Monthly
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