magnetic
®
...einfach besser
GDissolved metals
Dissolved metals, such as iron or manganese should not be present in the
water.
Dissolved gases
The content of dissolved gases, such as oxygen and carbon dioxide are
reduced through the use of an HWR. In case of the presence of circulating
bubbles, we recommend installing an additional microbubble deaerator.
TOC (organic carbon)
The TOC content is a measure for the organic contamination of the water. A
value of < 30 mg/l is deemed acceptable. In case of a copper installation,
the value should not exceed 1.5 mg/l..
Electrical conductivity
When using a Heating Water Regulator, the electrical conductivity of the
systemwater should be at 50 - 100 μS/cm.
Appearance
The filling water in the heating should be clean and clear.
4.2 Necessity for treating the filling water
In heating systems with oxygen intake due to construction features, one should always endeavour to maintain low electrical
conductivity in the heating water, as this can cut down corrosion processes. As a regulator is mostly used in systems with
high oxygen intake, we recommend a reduction of electrical conductivity to a level of 50-100 μS/cm in conjunction with the
installation. It might be necessary to treat the filling water due to requirements from other component manufacturers, as well
as if it is necessary to fulfil a directive, such as VDI 2035.
4.3 Type of filling water treatment
If it is necessary to treat the filling water, then one should exclusively use water demineralisation to treat the filling water
in conjunction with an HWR. A residual conductivity of 50 - 100 μS/cm must be retained. When using a heating water
regulator, the filling water should not be softened using ion exchange.
4.4 Use of antifreeze agents
No classic antifreeze agents should be used with heating water regulators from magnetic
®
, as these agents often contain
chemical inhibitors. These inhibitors can result in the device breaking down completely. If there is a risk that the pipes in the
heating system could freeze, ethylene glycol that is labelled chemically pure may be used as an antifreeze additive. It should
be noted that the aging of the ethylene glycol leads to the formation of acids which are bound by the HWR. In case of very
high temperatures, the acid formation may exceed the degree of buffering which may result in a temporarily lower pH value. If
you are using antifreeze agents, it is necessary to check the frost protection as well as the pH value of the water annually.
4.5 Influence of electrochemical water treatment on total hardness
In our experience, depending on the composition of the water, the overall hardness of the system water will sink if the pH
value increases, and the related precipitation of calcium carbonate shall decrease slightly.
In low temperature systems, it is possible that existing free carbon dioxide may be bound by the converted magnesium ion to
form magnesium hydrogen carbonate. You don’t need to worry about an uncontrolled increase in hardness, as there will be no
free carbon dioxide in the heating water over a pH value of 8.2. In contrast to calcium carbonate there is no additional risk of
damage due to limescale formation due to the good solubility of magnesium carbonate.