16 Further technical information
EN
74 Rittal Liquid Cooling Package
16 Further technical information
16.1 Hydrological information
To avoid system damage and to ensure safe opera-
tion, Rittal GmbH & Co KG recommends the use of
system water or an additive whose composition does
not differ from the hydrological data presented below:
Tab. 41: Hydrological data
pH value 7 – 8.5
Carbonate hardness > 3 < 8 °dH
Free carbonic acid 8 – 15 mg/dm
3
Accompanying
carbonic acid
8 – 15 mg/dm
3
Corrosive carbonic
acid
0 mg/dm
3
Sulphides Free
Oxygen < 10 mg/dm
3
Chloride ions < 50 mg/dm
3
Sulphate ions < 250 mg/dm
3
Nitrates and nitrites < 10 mg/dm
3
COD < 7 mg/dm
3
Ammonia < 5 mg/dm
3
Iron < 0.2 mg/dm
3
Manganese < 0.2 mg/dm
3
Conductivity < 2200 μS/cm
Evaporation residue < 500 mg/dm
3
Potassium perman-
ganate consumption
< 25 mg/dm
3
Suspended matter < 3 mg/dm
3
> 3 < 15 mg/dm
3
, partial flow pu-
rification recommended
> 15 mg/dm
3
, continuous purifi-
cation recommended