4.1 Water quality for operating the HWR 50/100 plus
In general, a regulator is installed in heating systems where, due to the system design, increased oxygenation is likely or where
a constant low pH value is measured in the heating water.
In order to protect the heating system against corrosion and silt build-up, the general water quality is of extraordinary impor-
tance and should not be neglected when installing the Heating Water Regulator.
In conjunction with installing an HWR, the water quality should be according to the following guide values, however with re-
gards to the fulfilment of any guarantee conditions, please take note of the respective component manufacturer’s provisions in
the first place.
Treatment of filling and make-up water
It is necessary to treat filling and make-up water if damages due to limes-
cale formation or corrosion due to the water quality. are likely. Only use
completely demineralised water for the magnetic
®
Heating Water Regulator.
Addition of chemicals
When using the HWR, do not add any additional chemicals to the system,
such as inhibitors, for example.
Chemical residue
Strongly contaminated old systems, in particular those which have been
pretreated using chemicals, must be rinsed completely prior to installing an
HWR. For this purpose, we recommend using our cleaning and dispersing
agent (magnetic
®
water demineralisation cleaner for heating systems).
Silt build-up
In our experience, using the HWR reduces existing silt build-up over a
longer period. However, in order to remove existing hydraulic problems the
system should be rinsed using the magnetic
®
water demineralisation clea-
ner for heating systems.
pH-value
The function of the regulators automatically sets the pH value of the heating
water to >8.3. This mechanism can be disturbed due to atypical acid reac-
tions, e.g. due to chemicals, which requires a case-by-case assessment.
Sodium
We recommend that the sodium value should be as low as possible (<20
mg/l). Sodium has a negative impact on water conductivity and, in combi-
nation with hydroxide ions (OH-), can lead to undesirable high pH values.
Chlorides
Chlorides increase conductivity and can result in corrosion, even on stain-
less steel. A value of <30 mg/l is recommended.
Sulphate / nitrate
Sulphates and nitrates increase water conductivity and can contribute to
pitting corrosion to copper. A value of <50 mg/l should be maintained.
4 - Filling water quality