Antifreeze + Biocide - Siemens SINAMICS S120 Equipment Manual

Cooling circuit, coolant properties and protection against condensation
9.2 Coolant definition
9.2.2

Antifreeze + biocide

Table 9- 4 Overview and application of coolant additives
Antifreeze Antifrogen N, 25 % < X ≤ 45 %
Antifrogen L, 25 % < X ≤ 48 %
Dowcal 100, 25 % < X ≤ 45 %
Biocide* Yes
Antifrogen N, minimum quantity 25%
Antifrogen L, minimum quantity 25 %
Dowcal 100, minimum quantity 25 %
Biocide ACTIDE MBS (0.2 - 0.4 by vol %) is recommended
as inhibitor.
Antifreeze + Antifreeze already has a biocidal effect in the minimum
biocide* concentration specified above.
* Effectiveness regarding the growth of microorganisms
Antifreeze
Only the following agents can be used as antifreeze:
● Antifrogen N (manufacturer: Clariant) with a percentage X of 25% < X ≤ 45% is the anti-
freeze used. Coolants containing 45% Antifrogen N provide protection down to -30° C.
● Antifrogen L (manufacturer: Clariant) with a percentage X of 25% < X ≤ 48% is the anti-
freeze used. Coolants containing 48% Antifrogen L provide protection down to -30° C.
● Dowcal 100 (manufacturer: DOW) used with a percentage X of 25 % < X ≤ 45 %. A
Dowcal 100 percentage of 45 % provides frost protection down to -30 °C.
All agents contain anti-corrosion inhibitors which permanently protect the metal in the cooling
system against corrosion.
It is particularly important to ensure that the percentage of antifreeze when topping up the
cooling system always corresponds to the minimum quantity, otherwise the mixture becomes
corrosive.
NOTICE
Material damage caused by incorrectly adding antifreeze
Incorrectly adding antifreeze to the cooling circuit can result in material damage caused by
corrosion and cooling circuit leaks.
• Always mix the coolant outside the cooling circuit before filling it.
• Do not add the individual cooling components one after the other.
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Used with SINAMICS S120 water cooled Please note the following in particular
For Antifrogen L, for the same antifreeze
protection, a higher concentration is re-
quired than for Antifrogen N
Cooling circuit with open pressurizer
Water-cooled chassis power units for common cooling circuits
Manual, 08/2017, 6SL3097-4AM10-0BP0