5.10 Filling The System; Water Treatment - DeDietrich MODULENS O AFC 18 Installation And Service Manual

AFC 18 - AFC 24 - AFC 30

5.10 Filling the system

Degree of acidity (water non-treated) pH
Degree of acidity (water treated)
Conductivity at 25°C
Chlorides
Other components
Total water hardness
(1) Flow temperature lower than 90°C - Maximum hardness: 1,50 mmol/l
09/07/2015 - 300026439-07
Safety solenoid valve
Y2
Variable-voltage solenoid
Y3
Safety thermostat
STB
5.10.1.
In most cases, the boiler and the central heating installation can be
filled with normal tap water and no water treatment will be necessary.
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.
4
For an optimum functioning of the boiler, the water of the installation
must comply with following characteristics:
Total installed heat output (kW)
≤ 70
6,5 - 8,5
pH 7 - 9
µS/cm ≤ 500
mg/l ≤ 50
mg/l < 1
°f 5- 35
°dH 2,8 - 20,0
0,5 - 3,5
(1)
mmol/l
If a water treatment is necessary, De Dietrich
Thermique recommends the following manufacturers:
4
4
4
4
4

Water treatment

Flush the central heating installation with at least 3x
the volume of the central heating installation. Flush
the DHW pipes with at least 20 times the volume of
the pipes.
Cillit
Climalife
Fernox
Permo
Sentinel
5. Installation
89