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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