Miele DA 420V-6, Operating Instructions Manual

Page: 51 / 448

Using for the first time
23
Water softener
In order to achieve good cleaning
results, the dishwasher needs to
operate with soft (low limescale) water.
Hard water results in the build-up of
calcium deposits on crockery and in the
appliance.
Water with a hardness level higher than
0.9 mmol/l (5 °dH – German scale) must
be softened. This occurs automatically
in the integrated water softener. The
water softener is suitable for a water
hardness level of up to 12.5 mmol/l
(70 °dH - German scale).
In order to be reactivated, the water
softener requires dishwasher salt.
Depending on the water hardness level
(< 3.8 mmol/l, or < 21 °dH – German
scale), dishwasher salt is not required if
combination detergents are being used
(see “Detergents - Types of
detergents”).
- The dishwasher needs to be
programmed to the correct water
hardness for your area.
- Your local water authority will be able
to advise you of the water hardness
level in your area.
- Where the water hardness fluctuates,
e.g. between 1.8 and 2.7 mmol/l (10 -
15 °dH - German scale), always
programme the dishwasher to the
higher value (2.7 mmol/l or 15 °dH in
this example).
If the water hardness in your area is
available in a unit other than °dH, you
can convert the values as follows:
1 °dH = 0.18 mmol/l = 1.78°fH
The dishwasher is programmed at the
factory for a water hardness level of
0.36 mmol/l (2 °dH - German scale).
If your water hardness level
corresponds to this setting, you can
skip to the next section.
However, if you have a different water
hardness level, you must adjust the
water softener to match your water
hardness.