Water Hardness - Miele CM 5310 Series Operating Instructions Manual

Water hardness is an indication of the
amount of minerals dissolved in water.
The more minerals in the water, the
higher the water hardness. The harder
the water is, the more frequently the
coffee machine needs to be descaled.
The coffee machine measures the
amount of water used and steam made.
Depending on the level of water
hardness set, more or fewer drinks can
be dispensed before the appliance
needs to be descaled.
Set the water hardness level on the
coffee machine to the water hardness
level for the local area to ensure that the
appliance functions correctly and is not
damaged. A prompt to descale the
coffee machine will then appear in the
display at the correct time.
Contact your local water supplier to find
out the water hardness in your area.
The machine is programmed ex-works
to hardness level 3.
The appliance has 4 programmable
hardness levels:
°dH mmol/l
0–8.4 0–1.5
8.4–14 1.5–2.5
14–21 2.5–3.8
> 21 > 3.8
* The hardness level shown in the display may
differ from the hardness level in your area. You
must follow the values in the chart to set your
coffee machine to your local water hardness level.
ppm Set-
(mg/l CaCO ) ting*
3
0–150 Soft 1
150–250 Medium 2
250–375 Hard 3
> 375 Very hard
4

Water hardness

Setting the water hardness
 Touch the  sensor control.
 Select
Settings 
confirm with OK.
 Select the hardness level and confirm
with OK.
The setting is now saved.
| Water hardness and
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