Technical Specification
2 --- 9
Hydrogen carbonate (HCO
3
) [mg/l]
70 ---300
Sulphate (SO
4
) [mg/l]
< 70
HCO
3
/ SO
4
> 1
Electrical conductivity [ S/cm]
10 ---500
Ammonia (NH
3
) [mg/l]
< 2
Dissolved magnesium (Mn) [mg/l]
< 0,1
Dissolved aluminium (Al) [mg/l]
< 0,2
Nitrate (NO
3
), dissolved [mg/l]
< 100
Hydrogen sulphate (SO
2
) [mg/l]
< 0,05
Free aggressive carbon dioxide (CO
2
) [mg/l]
< 5
Glycol [%]
< 50
Solids (particle size) [mm]
< 0,1
Alge
not permissible
Tab. 22
Cooling Water Quality
2.10
Internal Heat Recovery (option W2 / W3)
A soldered, plate heat exchanger is installed for heat recovery.
Generally water is used as the heat transfer medium. This must conform to the specifica-
tion given below.
The manufacturer should be consulted before another type of heat transfer
medium is used.
Water Quality Specification
pH value
7.5 to 9
Hardness [ dH]
4,0 ---8,5
Chloride (Cl)* [mg/l]
< 150
Free chlorine gass (Cl
2
) [mg/l]
< 1
Sulphate (SO
3
) [mg/l]
< 1
Dissolved iron (Fe) [mg/l]
< 0.2
Hydrogen carbonate (HCO
3
) [mg/l]
70 ---300
Sulphate (SO
4
) [mg/l]
< 70
HCO
3
/ SO
4
> 1
Electrical conductivity [ S/cm]
10 ---500
Ammonia (NH
3
) [mg/l]
< 2
Dissolved magnesium (Mn) [mg/l]
< 0,1
Dissolved aluminium (Al) [mg/l]
< 0,2
Nitrate (NO
3
), dissolved [mg/l]
< 100
Hydrogen sulphate (SO
2
) [mg/l]
< 0,05
Free aggressive carbon dioxide (CO
2
) [mg/l]
< 5
Glycol [%]
< 50
Solids (particle size) [mm]
< 0,1
Alge
not permissible
Tab. 23
Water Quality Specification
If the heat transfer medium outlet temperature is to be kept constant, the
user must install an appropriate regulating device.
Summary of Contents for CSD 82
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