SystemAir VH07, Руководство по установке и обслуживанию

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English
If the water circuit is to be drained for a time exceeding one month, the circuit must be fully
charged with nitrogen to prevent any risk of corrosion by differential venting.
Caution
The manufacturer is not liable for recommendations in terms of water treatment (call a specialized
company).
However, this matter has a critical nature, and particular care must be given to ensure that the type
of treatment applied is effective.
The liability of the manufacturer or its representative will not be sought when non treated water
or non compliant quality water is used.
Caution
11 VH
7.6. WATER QUALITY
The water must be analyzed; the hydraulic network system installed must include all elements necessary
for water treatment: filters, additives, intermediate exchangers, drain valves, vents, check valves, etc.,
according to the results of the analysis.
Using improperly treated or non treated water in the VH may cause scaling, erosion, corrosion or algae
or sludge deposits in the exchangers. Refer to a specialist skilled in water treatment to determine any
treatment to apply. The manufacturer will not be held liable for damages caused when non treated or
improperly treated water, demineralized water, salty water or sea water are used.
Apply the following guidelines :
²
No NH
4
+
ammonium ions in the water, highly detrimental to copper. <10mg/l
²
Cl
-
chloride ions are detrimental to copper with a risk of puncture by picking corrosion. <10mg/l.
²
SO
4
2-
sulphate ions may cause perforating corrosion. < 30mg/l.
²
No fluoride ions (<0.1 mg/l)
²
No Fe
2+
and Fe
3+
ions, particularly in case of dissolved oxygen. Fe< 5mg/l with dissolved oxygen <
5mg/l. The presence of these ions with dissolved oxygen indicates corrosion of steel parts, likely
to generate corrosion of copper parts under Fe deposits, particularly in the case of multitubular
exchangers.
²
Dissolved silica: silica is an acid element of water and may also cause corrosion. Content < 1mg/l.
²
Water hardness: TH > 2.8K. Values between 10 and 25 may be recommended. This facilitates scaling
deposits likely to limit copper corrosion. Excess TH values may lead to clogging the pipes.
²
TAC<100
²
Dissolved oxygen: Prevent any sudden change in the water's oxygenation conditions. Also, avoid
deoxygenating water by sparging inert gas as well as overoxygenating it by pure oxygen sparging.
Disturbing oxygenation conditions destabilizes copper hydroxides and particle salting-out.
²
Electrical Resistivity - Conductivity: The higher the resistivity, the slower the corrosion. Values above
3000 ohm/cm are preferred. A neutral environment favours maximum resistivity. For electrical
conductivity, values around 200-600 S/cm can be recommended.
²
pH: neutral pH at 20°C (7 < pH < 8)