5
Filterline scale filter (type HD 4621)
Limescale deposit
Limescale is a harmless deposit which is naturally
formed when hard water is heated.
The amount of scale deposit (and thus the need to
descale your kettle) largely depends on the
hardness of the tapwater in your area and the
frequency with which you use your kettle.
Limescale is not harmful to your health, but it
gives a powdery taste to your beverage.
The “Filterline” scale filter (F) is designed to
prevent scale particles from being poured into
your beverage by trapping them within the kettle.
The scale filter is removable to enable cleaning
and replacement.
Cleaning the scale filter
As the scale filter traps the scale particles it needs
regular cleaning to maintain easy filling and
pouring of the kettle.
The scale filter can be cleaned by
- removing it from the kettle (make sure no hot
water is in the kettle)
- and running it under the tap while gently
brushing with a soft nylon brush (fig. 6)
- and/or by soaking the filter in vinegar or a
proprietary descaling agent overnight.
You can also clean the scale filter by leaving it in
the kettle during descaling of the whole appliance.
See under “Descaling your Kettle”.
After the scale filter is cleaned, simply replace it in
the kettle (fig. 7).
Make sure never to leave the scale filter loose
inside the kettle.
Replacement scale filter
Replacement scale filters for types HD 4620-27
can be obtained from your Philips dealer under
type n° HD 4966.
Descaling your kettle
Excessive limescale shortens the element life and
may result in the kettle not operating properly.
To ensure continued performance, descale your
kettle regularly.
The frequency depends on on water conditions
and amount of use.
Descale using a proprietary descaling agent and
follow the manufacturer’s instructions.
Alternatively, proceed as follows:
- Boil 700 ml of water in your kettle.
- After switch-off, add 300 ml of normal (8%)
vinegar to the water in the kettle.
- Leave the solution to stand in the kettle
overnight.
- Empty the solution out and rinse the inside of
the kettle thoroughly with clean water.
- Fill the kettle with clean water up to “MAX” and
bring to the boil.
- Empty the kettle and rinse again with clean
water.
If scale remains, repeat the procedure.
