Immergas MAGIS COMBO 4 V2 Instructions And Recommendations page 35

1.28 WATER TREATMENT PLANT FILLING
As already mentioned in the previous paragraphs, a treatment of
the thermal and domestic system water is required, in compliance
with the local standards in force.
The parameters that influence the duration and proper operation
of the heat exchanger are the water's PH, total hardness, conducti-
vity, and oxygen, together with the system's processing residues
(any welding residues), any oil present and corrosion products
that can, in turn, cause damage to the heat exchanger.
In order to prevent this from happening, you are recommended
to:
- clean the system with clean water to eliminate solid residues
before installation on new and old systems;
- clean the system with a chemical treatment:
• clean the new system with a suitable cleaning device (for
example Sentinel X300, Fernox Cleaner F3 or Jenaqua 300)
combined with thorough washing;
• clean the old system with a suitable cleaning device (for
example Sentinel X400 or X800, Fernox Cleaner F3 or Jena-
qua 400) combined with thorough washing;
- Check the maximum total hardness and quantity of filling wa-
ter referring to the graphics (Fig. 37); if the contents and hard-
ness of the water are below the indicated curve, no specific treat-
ment is required; otherwise, to limit the content of calcium
carbonate, you must provide for water-filling treatment.
- If it is necessary to provide for water treatment, it should be done
through complete desalination of the filling water. As opposed
to the complete softening process, desalinating the water com-
pletely not only removes hardening agents (Ca, Mg), but also
eliminates all other minerals to reduce water-filling conductivi-
ty up to 10 microsiemens/cm. Given its low conductivity, desali-
nated water does not only prevent the formation of lime scale,
but also serves as protection against corrosion.
- Insert a suitable inhibitor / passivator (for example Sentinel
X100, Fernox Protector F1, or Jenaqua 100); if required, also in-
sert appropriate antifreeze (such as for example Sentinel X500,
Fernox Alphi 11 or Jenaqua 500).
- Check electrical conduction of the water, which should be hi-
gher than 2000 μs/cm in the case of treated water and lower than
600 μs/cm in the case of non-treated water.
- To prevent corrosion, the water system's PH should be between
7.5 and 9.5.
- Check the maximum content of chlorides, which should be less
than 250 mg/l.
For quantities and methods of use of water-treatment
products, refer to the instructions provided by their ma-
nufacturer.
Y
Key (Fig. 37):
X - Total water hardness °F
Y - Litres of system water
The graph refers to the entire life cycle of the system. The-
refore, also consider scheduled and unscheduled main-
tenance, which involves emptying and filling the said
system.
X
37
35