WMF BUENO Série Mode D'emploi page 11

The unit can be shut off early by pressing the ON/OFF key
if you have accidentally turned it on without adding water. It is vital to let the
coffeemaker cool for a few minutes before adding water to the hot unit.
Cleaning
Disconnect the power plug and leave the appliance to cool down.
Never immerse the appliance in water; simply wipe the exterior using a damp cloth
with a drop of washing-up.
Do not use harsh or abrasive cleaning agents.
Clean the filter and thermo pot under running water.
Decalcifying
Limescale and calcium deposits result in a loss of energy and impair the service life
of the appliance. The appliance will switch off prematurely if the deposit is too
excessive. It is then very difficult to remove the deposit. We therefore recommend
you to decalcify the appliance regularly, but at the latest when the brewing time
increases significantly or there is more noise during the brewing process.
The following values are offered for guidance and are based on daily use in a
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 ask the responsible waterworks or community administration about how
hard the water is in the region where you live. We recommend using durgol® uni-
versal. It is highly effective and gentle on material with no additional acting time.
You can find it where you purchased the unit, in select specialist trade, or order it
directly from wmf consumer electric.
To remove lime, place a paper filter in the unit and set the pitcher into the unit. Any
more substantial amounts of limescale residue collect on the filter paper and thus
prevent the spout becoming clogged. Pour 1-2 cups of durgol® universal into the
water tank and fill up with tap water to the 7-cup mark. Press the Start/Stop key
to remove lime.
Then rinse by running through a full tank of tap water.
Absolutely do not use vinegar or vinegar essence, since this may damage materials in
the unit.
When using citric acid based lime removers, lime removal may lead to the formation
of deposits which seal the lime coating or plug the lines in the unit. Lime removal
with citric acid is also too slow – complete lime removal can therefore not be
guaranteed.
Attention, there are no guarantee claims for damage caused by non-compliance
with the lime removal instructions.
Hardness Decalcification
0 - 7° dH every 6 months
>7- 14° dH every 3 months
>14 - 21° dH every 6 weeks
>21° dH every 4 weeks
. This may be necessary
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