Water Hardness - Miele DGC 7440 HCX Pro Operating And Installation Instructions

Combination steam oven
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Water hardness

The combination steam oven must be
adjusted to the local water hardness
level to ensure that it works correctly
and to ensure that descaling is carried
out at the correct interval. The harder
the water is, the more frequently the
combination steam oven needs to be
descaled.
Contact your local water supplier to find
out the hardness of the water in your
area.
If you use bottled water, such as min-
eral water, make sure it is not carbon-
ated. Adjust this setting depending on
the calcium content. The calcium con-
tent is specified on the label of the
bottle in mg/l Ca
You can set the hardness level between
and
1 °dH
70 °dH
set to
by default.
15 °dH
Water hardness
°dH
mmol/l
1
0.2
2
0.4
3
0.5
4
0.7
5
0.9
6
1.1
7
1.3
8
1.4
9
1.6
10
1.9
11
2.0
42
2+
or ppm (mg Ca
. The hardness level is
Calcium con-
tent
2+
mg/l Ca
or
2+
ppm (mg Ca
/l)
7
14
21
29
36
43
50
57
64
71
79
Water hardness
°dH
12
13
14
15
16
17
18
19
20
21
2+
22
/l).
23
24
25
26
Setting
27
28
29
1
30
2
31
3
32
4
33
5
34
6
35
7
36
8
37–45
9
46–60
10
61–70
11
Calcium con-
tent
mmol/l
2+
mg/l Ca
ppm (mg Ca
2.2
86
2.3
93
2.5
100
2.7
107
2.9
114
3.1
121
3.2
129
3.4
136
3.6
143
3.8
150
4.0
157
4.1
164
4.3
171
4.5
179
4.7
186
4.9
193
5.0
200
5.2
207
5.4
214
5.6
221
5.8
229
5.9
236
6.1
243
6.3
250
6.5
257
6.6–8.0
258–321
8.2–10.7
322–429
10.9–12.5
430–500
Setting
or
2+
/l)
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37–45
46–60
61–70

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