5
Do not fill with more than 1.7 litres of water (up
to "MAX" indication).
Avoid overfilling to prevent boiling water being
ejected from around the top of the kettle.
Switching on
- (Fig. 3) Place the kettle on the base unit, which
is connected to a wall socket. (You can keep
the base unit connected.)
- (Fig. 4) The appliance is switched on by setting
the on/off switch into the "up" position. The pilot
light will come on.
Switching off
- (Fig. 5a) When the water has boiled the
appliance switches off automatically.
- (Fig. 5b) At any time you can switch the kettle
off manually by setting the on/off switch into the
"down" position.
Switching on again?
- If switched off automatically, first allow the built-
in thermal safety switch 15-20 seconds to cool
down.
Then you may switch on again.
During the cooling down time do not force
the on/off switch into the "up" ("ON")
position as this can damage the operating
mechanism.
Cleaning
• Do not immerse in water.
• The kettle may be cleaned with a damp cloth.
First remove the kettle from the base unit.
The base unit can be cleaned in the same
manner. First remove the mains plug from the
wall socket.
• Soap or detergent can be used to remove
troublesome stains. Do not use aggressive and
abrasive cleaning agents.
Filterline scale filter (with type HD 4391 only)
To prevent loose particles of limescale being
poured out into your beverage, your kettle is fitted
with a scale filter.
The filter is removable to enable cleaning and
replacement.
Limescale deposits
Limescale is a harmless deposit which is naturally
formed when (more or less) hard water is heated.
It can be found mostly adhered to the heating
element.
The amount of limescale deposited (and
subsequently the need to clean or descale) largely
depends on the water hardness in your area and
the frequency with which the kettle is used.
Limescale is not harmful to your health. But if
poured into your beverage it can give a powdery
taste to your drink.
The scale filter is designed to prevent these scale
particles from being poured out by trapping them
within the kettle.
Cleaning the scale filter
To avoid an excessive amount of limescale
building up inside your kettle, it is important that
both the kettle and filter are cleaned on a regular
basis.
Scale can be removed from the filter by
- running it under a tap, whilst gently brushing
with a soft nylon brush (fig. 6);
- or by soaking the filter in vinegar or a
proprietary descaling agent.
• Before removing the filter (for replacement or
cleaning):
- Ensure that the kettle is unplugged from the
mains.
- Do not attempt to remove the filter when hot or
when the kettle contains hot water.
• Never leave the filter loose inside the kettle.
Ensure that the filter is always correctly
placed between the two ribs.
- Slide the filter downwards until it clicks into
position (fig. 7).
Periodically: descaling
In the course of time, a build-up of limescale may
occur on the filter gauze, reducing the filling (via
the spout) and pouring performance of the kettle.
Limescale adhered to the heating element will
reduce the heating capacity.
Therefore, the kettle with the filter in place, should
be descaled periodically as indicated in section
"Descaling".
Replacement filters
Replacement filters can be obtained under type
nr. HD 4961 from your Philips dealer.
Scale filters can also be applied with kettles type
HD 4390 if provided with locating ribs (see fig. 7).
Descaling
Descale the kettle regularly. With normal use:
at least twice a year.
- Boil 700 ml of water in the kettle.
- Switch off and unplug from the electrical
supply.
- Add 300 ml of ordinary vinegar to the water in
