Water component for corrosion limit on Copper
PH 7,5 ÷ 9,0
SO
4
--
< 100
HCO
3
-
/ SO
4
--
> 1
Total Hardness 8 ÷ 15 °f
Cl- < 50 ppm
PO
4
3-
< 2,0 ppm
NH
3
< 0,5 ppm
Free Chlorine < 0,5 ppm
Fe
3
+
< 0,5 ppm
Mn
++
< 0,05 ppm
CO
2
< 50 ppm
H
2
S < 50 ppb
Temperature < 65 °C
Oxygen content < 0,1 ppm
Sand
10 mg/L
0.1 to 0.7mm max diameter
Ferrite hydroxide
Fe3O4 (black)
Dose < 7.5 mg/L 50% of mass
with diameter < 10 µm
Iron oxide Fe2O3
(red)
Dose < 7.5mg/L
confirming to local regulations
Langelier (IL) index between 0 and +0.4
within the limits indicated by table
The water quality must be checked by qualified personnel.
CAUTION
Circulators operate best with clean, good quality tap water.
The most frequently occurring factors which may have a
negative effect on heating water can be oxygen, lime,
sludge, acidity level and other substances (including
chlorides and minerals).
In addition to the heating water quality, the installation also
plays a significant part.
If the water hardness is high install a system suitable to
preserve the unit from harmful deposits and limestone
formations.
If necessary, fit a water softener to reduce water hardness.
Before making the water connections to unit clean carefully the
system with specific and effective products for removing
residues or impurities that could affect the operation. The
existing systems must be free from sludgs, contaminants and
protected against foulings.
In the case of new installations, it is first of all crucial to flush
the entire installation thoroughly (without the circulator
mounted) before the central installation is commissioned. This
will remove residues from the installation process (weld, slag,
fitting products…) and preservatives (including mineral oil).
The system shall then be filled with clean, good quality tap
water.
If a new boiler or heat pump is being installed in an existing
heating system, the system must be flushed to avoid particles
presence, sludge and other problems in the installation. Where
applicable, flushing shall be done before the new application is
installed. Loose dirt can only be removed where there is
sufficient flow. Flushing will therefore take place section by
section. Special attention must also be paid to “blind spots”,
where there is only a small amount of flow and where a lot of
dirt can be accumulated. The system shall then be filled with
clean, good quality tap water. If after the flushing the quality of
the water in an existing installation still proves to be
inadequate, certain measures must be taken to avoid
circulator problems. One option for removing pollution is to
install a filter. Various kinds of filters are available for this. A
screen filter is designed to trap large dirt particles. This filter is
usually placed in the full flow part of the system. A fabric filter
on the other hand, is designed to trap finer particles.
The warranty does not cover damages caused by limestone
formations, deposits and impurities from the water supply and /
or failure from failed system clearing to clean system.
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