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83000102.Ko
2.17.
Water quality
The following limit values must be adhered to to ensure the safe operation of the devices:
Table 6: Water quality
Property /
Constituents
Unit
Value range
Standard model
Value range
Non-ferrous metal version
pH-value (20°C)
-
7,5 - 9
6 - 10
Saturation index
-
-0,2 < 0 < 0,2
-
Conductivity
µS/cm
30 - 500
3 - 2000
Water hardness
°dH
4,5 - 8,5
< 8,5
Total germ count
K/ml
<10,000
<10,000
Grain size
µm
< 250
< 250
Glycole fraction (AFN)
Vol%
0, 20 - 40
0, 20 - 40
Oil fraction
Vol%
0
0
Chloride (Cl-)
mg/l
< 200
< 200
Sulphate
mg/l
< 70
< 300
Nitrate
mg/l
<100
<100
Copper
mg/l
<0.1
<0.1
Iron
mg/l
<0.2
<0.2
Free carbonic acid
mg/l
< 5
<20
Manganese
mg/l
<0.1
<0.1
Ammonia
mg/l
< 0,5
< 20
Free chloride
mg/l
<0.5
< 1
Sulphide
mg/l
< 1
< 1
Hydrogen carbonate
mg/l
70 - 200
-
Hydrogen sulphide
mg/l
< 0,05
< 0,05
Filterable substances
mg/l
< 30
< 30
To prevent clogging of the plate heat exchangers, the prescribed limit values must be observed.
Furthermore, any occurrence of mucilage bacteria in the cooling water must be ruled out. If this is not
possible, KKT chillers can suggest or provide a suitable inhibitor on the basis of a biological water analysis to
remove the mucilage agents.
