Petra electric WK 140 Gebrauchsanweisung Seite 6

change the filter again.
Replacement filter cartridges can be
obtained there where you bought the
appliance or can be ordered directly
from the manufacturer www.petra-
electric.de
Important advice
• Use the water-filter-kettle with cold
tap water only.
• Do not put the water-filter-kettle in
direct sun light.
• If you do not use the kettle for a
long period of time, it is best to
store the filter cartridge packed in
a foil bag in the refrigerator. When
you put the kettle into operation
again, pour away the first filtered
water.
• Always store replacement filter
cartridges cool and dry and in the
original packing.
• The filtration raises the content of
the potassium in the drinking water.
Persons suffering from a kidney
complaint, dialysis patients or
other persons, who have to keep a
potassium diet, should ask their
doctor before drinking the filtered
water.
• The filter material in the cartridge
was treated with silver. This makes
it hygienically harmless for a longer
period of time. A small amount is
emitted in the water during the fil-
tration. This amount is far under
the target value determined in the
guidelines of the World Health
Organisation (WHO).
6
®
• Aqua Optima filter cartridges are
regularly controlled by the world
health organisation NSF.
Water level indicator
The water level indicator is valid for
the operation with the Aqua Optima
filter cartridge up to the 1.0 litre mar-
king, marked with
. If you fill the
filter container (1) up to the max mar-
king (5), the water is on the level of
approximately 1.0 litre marking after
the filtering. Please observe that the
water level does not exceed the 1.0
litre marking, marked with during
the filtering operation.
While the water runs through the fil-
ter, the kettle can immediately be
placed on its base and the operation
button on the top of the handle can
be switched to I. However, prior to
this, close the lid until it snaps – only
in this way the safety boil-dry cut-out
works reliably. The control lamp in
the operation button indicates that
the appliance is heating.
You can operate the kettle also with-
out the filter in order to quickly heat
up 1.7 litres of water at maximum.
For this, remove the filter container
(1) and fill the kettle to its full capaci-
ty up to the max marking.
For filling remove the kettle from
its base. Only fill with cold water,
never carbonated water or other
liquids like milk or similar.
During boiling a higher noise level is
to be expected due to the high vol-
tage. The water from the first boiling
is not suitable for food preparation.
Automatic boil stop
Shortly after the water has started to
boil, the appliance switches off auto-
matically and the control lamp extin-
guishes. If there is only little water in
the kettle the boiling period until
automatic switch off will be extended.
If only warm water is desired, the
heating process can be stopped at
any time by resetting the operation
switch to . If you want to boil hot
water again the appliance can be
switched on once again to I, after
some time.
Safety system
If the kettle is inadvertently switched
on without water, a thermostat pro-
tects the appliance from overheating
by switching it off.
In order to switch it on again the
kettle has to be removed from its
base so that the thermostat will reset
automatically. Before refilling with
water wait another 5 minutes until the
appliance has cooled down.
If the thermostat fails to work due to
inappropriate use, an additional tem-
perature cut-out ensures double
safety.
De-scaling
Ion exchanger in the Aqua Optima
Filter Cartridge cannot completely
remove chalk from tap water.
Therefore, by time, lime scale will
appear at the bottom of the kettle
causing loss of energy and can also
reduce the life time of the appliance.
If the lime scale is too thick, the
appliance switches off before the
water starts boiling. In this case it is
very difficult to remove the lime
scale. Therefore, the pot should be
regularly de-scaled with usual de-
scaling agents suitable for stainless
steel. Please refer to the user
instructions of the manufacturer.
Never allow the substance to boil,
otherwise it will foam over the top of
the kettle.
When de-scaling, the Aqua
®
Optima Filter Cartridge has to
be removed.
After de-scaling rinse the kettle care-
fully with clear water. The guarantee
does not cover damages resulting
from non-keeping to the manufactu-
rer's instructions.
Cleaning and maintenance
Before cleaning unplug the appliance.
Never immerse the kettle or the
base into water.
Rinse the inside of the kettle regularly
and clean the filter container and sieve
in mild dishwater.
Clean the outside with a damp cloth
only. Do not use any caustic or scou-
ring cleaning agents. The pot is made
from rust-resistant stainless steel. Any
®
iron moulds are only residues which
stick on the surface. They can be remo-
ved with a special cleansing agent for
stainless steel.