28 Rittal air/water heat exchanger assembly instructions
11 Further technical information
EN
11.1 Hydrological data
To avoid system damage and to ensure safe
operation, Rittal GmbH & Co. KG recommends
the use of system water or an additive whose
composition does not differ from that presented
in the following summary:
Tab. 11: Hydrological data
Hydrological data Unit
Model No. Model No.
1)
–
3363.100/.500/
3364.100/.500/
3373.100/.110/.140/.500/.510/.540
3374.100/.110/.140/.500/.510/.540
3375.100/.110/.140/.500/.510/.540
3363.104/.504
3364.104/.504
3373.104/.114/.144/.504/.514/.544
3374.104/.114/.144/.504/.514/.544
3375.104/.114/.144/.504/.514/.544
pH value 7 – 8.5 6 – 9
Calcium hardness °dH > 3 < 8 1 – 12
Free carbonic acid mg/dm
3
8 – 15 1 – 100
Corresponding carbonic acid mg/dm
3
8 – 15 free
Aggressive carbonic acid mg/dm
3
free 0 – 400
Sulphides mg/dm
3
free free
Oxygen mg/dm
3
< 10 < 10
Chloride ions mg/dm
3
< 50 < 200
Sulphate ions mg/dm
3
< 250 < 500
Nitrates and nitrites mg/dm
3
< 10 < 100
COD mg/dm
3
< 7 < 40
Ammonia mg/dm
3
< 5 < 20
Iron mg/dm
3
< 0.2 free
Manganese mg/dm
3
< 0.2 free
Conductivity μS/cm < 2200 < 4000
Evaporation residue mg/dm
3
< 500 < 2000
Potassium permanganate mg/dm
3
< 25 < 40
Suspended matter
mg/dm
3
< 3
mg/dm
3
> 3 < 15; partial current purification recommended
mg/dm
3
> 15; continuous purification recommended
1)
The complete absence of corrosion under experimental conditions suggests that solutions with a significantly higher salt content
and greater corrosion potential (such as seawater) can still be tolerated.
11 Further technical information