Requirements For The Water Quality - nVent SCHROFF LHX+ User Manual

3.4.2 Requirements for the water quality

Risk of corrosion!

If aluminum is used in the external water circuit, there is a risk of corrosion.

To avoid electrochemical corrosion, the compatibility of the materials used in the
cooling module with those of the external cooling circuit must be observed.

The type and dosage of a suitable anticorrosive or antifreeze agent depends on the
structural environment and the external recooling system and must be determined
individually by the plant planner.
The following materials are used in the cooling module:




To ensure trouble-free operation of the cooling module, the following water quality
requirements must be met.
(see also VDI 3803 / ASHRAE: Liquid cooling guidelines for Datacom equipment centers,
second edition).
Electrical conductivity:
Hydrogen concentration:
Chloride:
Total Hardness:
Colony-forming units:
Appearance:
Colour:
ATTENTION
Aluminum
Brass
Copper
Stainless steel
25 mS/m - 100 mS/m at 25 °C /77 °F
7,5 - 8,5 (ph-value) at 20 °C /68 °F
< 50 mg/l / 50 ppm
> 3 °dH < 8 °dH
< 1000 CFU/ml
clear
colourless
Date: 2021/04/07 Page
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