Table of Contents
MAINTENANCE
Descaling
In time, the substances which the appliance removes from
your drinking water tend to clog the membrane and will
eventually reduce the flow of pure water from the tap. To
prolong the service life of the membrane, it has to be
descaled periodically.
When you notice that the flow rate from the tap has
decreased, you need to follow the descaling procedure
below. The time schedule for how often you will need to
do this will depend on your particular water supply,
especially on its levels of calcium ("hardness", see table,
right), iron, manganese and possibly silicon, as well as of
microorganisms.
Even with regular descaling, the maximum flow of
purified water from the appliance will decrease gradually
on account of the normal properties of the membrane.
When you notice that the flow is about half of what it was
when the membrane was new, contact your dealer to have
the membrane replaced.
You can descale the appliance yourself. It takes about ten
hours, during which time you will not be able to use the
appliance.
You should descale your RO 400:
• when the flow of water from the tap has decreased
• at the intervals recommended in the table (right)
The correct descaling product for this appliance can be
ordered from your dealer. Please quote the part number
listed under "Optional accessories and consumables".
The descaling product must be kept out of the reach
of children.
Wash your hands after using it.
1 Disconnect the electrical plug, then plug it back in
again to make the appliance switch to flushing mode.
2 Make sure that the tap for purified water is turned off
and that the appliance has finished flushing. Leave the
electrical supply to the appliance on.
3 Undo filter container
the filters", steps 3–7.
4 Measure 250 ml (corresponds to 200 grams) of the
descaling agent into the container. Fill the container
almost to the top with lukewarm water (20 – 40 °C).
Stir until the powder has dissolved, see Fig. A.
5 Screw the container (containing the descaling solution)
back onto the appliance with the aid of the filter
spanner.
6 Turn on the tap for purified water and let the RO 400
operate for 45 seconds.
16
as described under "Replacing
FREQUENCY OF DESCALING
Calcium Ca 2+ &
Hardness
°d
magnesium Mg 2+
mg/l
- 7
- 50
- 14
50 - 100
- 20
100 - 140
Conversion to hardness degrees
Hardness
1 grain (CaCO 3 ) per U.S. gallon
1 grain (CaCO 3 ) per U.K. gallon
1 °d (german)
1 °fr (french)
1 °r (russian)
A
Frequency of
descaling
every 6 months
every 3 months
every month
Calcium: Ca 2+
mg/l
6,82
5,72
7,14
4,00
1,00
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