SOLARFOCUS vampair K 08, Руководство по установке

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6 Hydraulic connection
Resistance of materials to water constituents
Irrespective of legal requirements, the following limit
values ​​in the heating water used for different materials
may not be exceeded or fallen below in order to ensure
safe operation of the heat pump. For this, an analysis
of the water must be carried out before com-
missioning.
If the pre-commissioning water analysis for one indi-
cator shows a "-" or an "o" for two indicators, treatment
of fill and make-up water is required.
Limits for the quality of the heating water:
Substance in
water
Concentration
mg/l or ppm Stainless
steel
Copper
Alkalinity
(HCO
3
-
)
<70 + o
70-300 + +
>300 + o / +
Sulphate (SO
4
2-
) <70 + +
70-300 + o / -
>300 o -
HCO
3
-
/ SO
4
-
>1.0 + +
<1.0 + o / -
Electrical con-
ductivity
<10 μS/cm + o
10-500 μS/cm + +
>500 μS/cm + o
pH value] <6.0 o o
6.0-7.5 o / + o
7.5-9.0 + +
>9.0 + o
Ammonia
(NH
4
+
)
<2 + +
2-20 + o
>20 + -
Chloride (Cl
-
) <300 + +
>300 o o / +
Free chlorine
(Cl
2
)
<1 + +
1-5 + o
>5 o / + o / -
Hydrogen sul-
phide (H
2
S)
<0.05 + +
>0.05 + o / -
CO
2
<5 + +
5-20 + o
>20 + -
Total hardness
(°dH)
4.0-8.5 + +
Nitrate (NO
3
) <100 + +
>100 + o
Iron (Fe) <0.2 + +
>0.2 + o
Aluminium (Al) <0.2 + +
>0.2 + o
Manganese (Mn) <0.1 + +
>0.1 + o
The water quality should be rechecked after 4 to 6
weeks as it may change due to chemical reactions
during the first few weeks of operation.
Electrical conductivity
The probability of corrosion usually decreases with
decreasing electrical conductivity of the heating water.
Recommendation: Low salt driving - filling with
demineralised water
, see VDI 2035 sheet 2.
Low salt
Electrical conductivity at 25°C < 100 µS/cm
Installation manual vampair 21