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4. Installation
4.12 Filling the system
Degree of acidity (water
non-treated)
Degree of acidity (water
treated)
Conductivity at 25°C
Chlorides
Other components
(1)
Total water hardness
(1) For installations that are heated at constant high temperatures with a total installed heat output; up to 200 kW a maximum total water hardness
of 8,4 °dH (1,5 mmol/l, 15 °f) applies and for above 200 kW a maximum total water hardness of 2,8 °dH (0,5 mmol/l, 5 °f) applies
54
4.12.1.
In most cases, the boiler and the central heating installation can be
filled with normal tap water and no water treatment will be necessary.
For an optimum functioning of the boiler, the water of the installation
must comply with following characteristics:
Total installed heat output (kW)
≤ 70
pH
7 - 9
pH
7 - 8,5
µS/cm
≤ 800
mg/l
≤ 150
mg/l
< 1
°f
1 - 35
°dH
0,5 - 20,0
mmol/l
0,1 - 3,5
Water treatment
WARNING
Do not add chemical products to the central heating water
without first consulting a water treatment professional. For
example: antifreeze, water softeners, products to increase
or reduce the pH value, chemical additives and/or
inhibitors. These may cause faults in the boiler and
damage the heat exchanger.
Rinse the central heating installation with at least 3x
4
the volume of the central heating installation. Flush
the DHW pipes with at least 20 times the volume of
the pipes.
70 - 200
200 - 550
7 - 9
7 - 9
7 - 8,5
7 - 8,5
≤ 800
≤ 800
≤ 150
≤ 150
< 1
< 1
1 - 20
1 - 15
0,5 - 11,2
0,5 - 8,4
0,1 - 2,0
0,1 - 1,5
If a water treatment is necessary, De Dietrich
Thermique recommends the following manufacturers:
Cillit
4
Climalife
4
Fernox
4
Permo
4
Sentinel
4
MCA 35
> 550
7 - 9
7 - 8,5
≤ 800
≤ 150
< 1
1 - 5
0,5 - 2,8
0,1 - 0,5
15/06/12 - 300022160-001-01
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