Operator responsibility – Safety instructions
12
2.3.
Cooling water connection
Only for water cooled models - FCW:
Cooling water pressure (IN / OUT )
max.
6 bar
Difference pressure (IN - OUT )
3.5 to 6 bar
Cooling water temperature
<20 °C
Recommended quality of cooling water:
pH – value
7,5 to 9,0
Sulfate [SO4 2- ]
< 100 ppm
Hydrocarbonate [HCO3- ] / Sulphate [SO4 2-] > 1 ppm
Hardness [Ca2+, Mg2+] / [HCO3-]
> 0,5 dH
Alkalinity
60 ppm < [HCO3-] < 300 ppm
Conductivity
< 500
μ
s / cm
Chloride (CL-)
< 50 ppm
Phosphate (PO43-)
< 2 ppm
Ammonia (NH3)
< 0,5 ppm
Free Chlorine
< 0,5 ppm
Ferri Ions (Fe3+ )
< 0,5 ppm
Mangano Ions (Mn2+)
< 0,05 ppm
Carbon dioxide (CO2)
< 10 ppm
Hydrosulfide (H2S)
< 50 ppm
Content of oxygen
< 0,1 ppm
Algae growth
impermissible
Suspended solids
impermissible
Notice:
Danger of corrosion of heat exchanger due to unsuitable quality of
cooling water.
•
Due to its high content of lime hart water is not suitable for cooling
and causes calcination of the heat exchanger.
•
Ferrous water or water containing ferrous particles will cause
formation of rust even in heat exchangers made of stainless steel.
•
Chlorous water will cause pitting corrosion in heat exchangers made
of stainless steel.
•
Due to its corrosive characteristics distilled and deionized water is
unsuitable and will cause corrosion of the bath. .
•
Due to its corrosive characteristics sea water is not suitable.
•
Due to its microbiological (bacteria) components which settle in the
heat exchanger untreated and unpurified river water and water from
cooling towers is unsuitable.
•
Avoid particulate matter in cooling water.
•
Avoid putrid water.
