Miele DGC7440W, Operating And Installation Instructions

Page: 43 / 172

Settings
43
Water hardness
To ensure that the steam oven works
correctly and to ensure that descaling is
carried out at the correct interval, it
must be set to the local water hardness
level. The harder the water is, the more
frequently the steam oven needs to be
descaled.
Contact your local water supplier to find
out your local water hardness range if
necessary.
If you are using bottled drinking water,
e.g. mineral water, use non-carbonated
water. Select settings according to the
calcium content. The calcium content is
given on the label of the bottle in mg/l
Ca
2+
or ppm (mg Ca
2+
/l).
The degree of hardness can be set
between
0.2 mmol/l (1° dH) and
12.5 mmol/l (70° dH) . The hardness level
is set to 2.7 mmol/l (15 °dH) at the
factory.

Set the water hardness level for your
area.
 Confirm with OK .
Water hardness Calcium content
mg/l Ca
2+
or
ppm (mg Ca
2+
/l)
Setting
°dH mmol/l
1 0.2 7 1
2 0.4 14 2
3 0.5 21 3
4 0.7 29 4
5 0.9 36 5
6 1.1 43 6
7 1.3 50 7
8 1.4 57 8
9 1.6 64 9
Water hardness Calcium content
mg/l Ca
2+
or
ppm (mg Ca
2+
/l)
Setting
°dH mmol/l
10 1.9 71 10
11 2.0 79 11
12 2.2 86 12
13 2.3 93 13
14 2.5 100 14
15 2.7 107 15
16 2.9 114 16
17 3.1 121 17
18 3.2 129 18
19 3.4 136 19
20 3.6 143 20
21 3.8 150 21
22 4.0 157 22
23 4.1 164 23
24 4.3 171 24
25 4.5 179 25
26 4.7 186 26
27 4.9 193 27
28 5.0 200 28
29 5.2 207 29
30 5.4 214 30
31 5.6 221 31
32 5.8 229 32
33 5.9 236 33
34 6.1 243 34
35 6.3 250 35
36 6.5 257 36
37-45 6.6-8.0 258–321 37-45
46-60 8.2-10.7 322–429 46-60
61-70 10.9-12.5 430-500 61-70