WMF STELIO Mode D'emploi page 11

Decalcifying
Limescale and calcium deposits result in a loss of energy and impair
the service life of the appliance. The appliance will switch off prema-
turely 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 signifi-
cantly 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 Hardness
1 soft 0 - 7° dH
2 medium >7- 14° dH
3 hard >14 - 21° dH
4 very hard >21° dH
1° dH corresponds to approximately 0.18 mmol/l Ca and Mg ions
You can obtain details of the water hardness range in your residential
area from your water works or community offices.
We recommend using durgol® universal. This decalcifier is highly
effective, protects the material and does not require any additional
exposure time.
You can obtain this decalcifier where you bought the appliance or
from select dealers, or you can order it directly from wmf consumer
electric.
Insert the paper filter and place the pot into the automatic coffee
maker. Fill 1-2 cups of durgol® universal into the water reservoir, fill
up the reservoir with tap water to the 9 cups mark and switch on the
appliance. During the decalcifying process repeatidly switch off the
machine for a few minutes. This will ensure an optimal decalcifying
effect.
Then let a reservoir full of tap water run through to rinse the appli-
ance.
On no account use vinegar or vinegar essence, as the materials in the
appliance could be damaged.
When using decalcifiers based on citric acid. precipitates may form
during decalcification and seal the calcium deposits or block the pipe-
lines in the appliance. Furthermore, decalcification with citric acid is
too slow and therefore complete decalcification cannot be guaranteed.
Important. Warranty compensation does not cover damage that
occurs due to non-compliance with the decalcification instructions.
Decalcification
every 6 months
every 3 months
every 6 weeks
every 4 weeks
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