Hoval 2-Max-3 condens, Руководство по сборке

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4 215 983 / 01 19
COMMISSIOnInG
5. Commissioning
5.1 Water quality
• Hoval boilers and calorifiers are suitable for heating sys-
tems without significant oxygen intake (system type I in
accordance with EN 14868).
• Systems with
­ continuous oxygen intake (e.g. underfloor heating
sys tems without diffusion-proof plastic piping) or
­ intermittent oxygen intake (e.g. requiring frequent top­
ping­up) must be equipped with a system separation.
• Treated heating water must be tested at least 1x per
year, or more frequently if specified by the manufacturer
of the inhibitor.
• On existing systems (for example if the boiler is re­
placed), where the quality of the existing heating water
meets the requirements of VDI 2035, re-filling of the
sys tem is not recommended. The requirements of VDI
2035 also apply to replacement water.
• Before filling new systems and, where necessary, ex ist-
ing systems, the heating system must be professionally
cleaned and flushed. The boiler must not be filled until
the heating system has been flushed.
• All parts of the boiler/calorifier which come into contact
with water are made of ferrous materials and stainless
steel.
• Due to the danger of stress corrosion, the sum of the
chlo ride, nitrate and sulphate contents of the heating wa­
ter must not exceed a total of 200 mg/l (ÖNORM H5195
stipulates that the limit value for chlorides is 30 mg/l).
• The pH­value of the heating water should be between
8.3 and 9.5 after 6 ­ 12 weeks of heating operation.
Filling and replacement water:
• As a rule, untreated domestic water is best suited as
fil ling and replacement water for a system with Hoval
boil ers. However, the quality of the untreated mains
wa ter must still meet the requirements of VDI 2035 or
be demineralised and/or treated with inhibitors. The re­
quirements of EN 14868 must be met in this context.
• To maintain high boiler efficiency and prevent over-
heating of the heating surfaces, the values in table 1
must be up held.
• The total quantity of filling and replacement water added
to the boiler over its service life must not be higher than
three times the system water content.
Table 1: Standard values for boiler and circuit water for circulation boiler (shell boiler)
Max. allowable operating pressure bar > 0.5 <= 25
General requirements colourless, free of undissolved substances
and foaming agents
pH value at 25 °C 8.2­11.5
Conductivity at 25 °C µS/cm < 1500
Total alkaline earths (Ca + Mg)
1)
mmol/l < 0.02
°dH < 0.112
°fH < 0.19
Silica acidic capacity 8.2
2)
(p­value) mmol/l 1­5
Silica (SiO
2
) mg/l < 100
Phosphate (P
2
O
4
)
3)
mg/l 5­10
Sodium sulphite (Na
2
SO
3
)
3)
mg/l 5­10
Iron mg/l < 0.2
Copper mg/l < 0.1
1)
Previously specified in °dH, conversion: 1 mmol/l = 5.6 °dH (German hardness)
2)
Previously specified as p-value, silica conversion 8.2 1 = p-value 1
3)
Proof only required if respective dosing chemicals are used.
The following value does not have to be verified constantly during plant operation: silica (SiO
2
)