Antifreeze, Biocides, Inhibitors - Siemens Sinamics S120 Manual

9.2.2

Antifreeze, biocides, inhibitors

Table 9- 6 Overview and application of approved coolant additives
Application with SINAMICS
S120, liquid-cooled, with alumi-
Antifreeze/ Antifrogen N, 25 % < X ≤ 45 %
inhibitor
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 %
Antifreeze + Antifreeze already has a biocidal
biocide* effect in the minimum concentra-
tion specified above.
Inhibitor Required
Fuchs Anticorit S 2000 A
ratio of 4 ... 5 %
* Effectiveness regarding the growth of microorganisms
Note
Combination of different heat sinks in one common cooling circuit
For a combination of liquid-cooled devices with aluminum heat sinks and stainless steel heat
sinks, then the specifications for the aluminum heat sinks always apply.
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.
Liquid-cooled chassis power units
Manual, (GH7), 11/2016, 6SL3097-4AM00-0BP7
Cooling circuit, coolant properties and protection against condensation
num heat sink
Application with SINAMICS
S120, liquid-cooled, with stain-
less steel heat sink
Antifrogen N, 25 % < X ≤ 45 %
Antifrogen L, 25 % < X ≤ 48 %
Dowcal 100, 25 % < X ≤ 45 %
Yes
Antifrogen N, minimum quantity
25%
Antifrogen L, minimum quantity
25 %
Dowcal 100, minimum quantity
25 %
Antifreeze already has a biocidal
effect in the minimum concentra-
tion specified above.
Not required
9.2 Coolant definition
Please note the following in
particular
For Antifrogen L, for the same
antifreeze protection, a higher
concentration is required than for
Antifrogen N
Cooling circuit with open pres-
surizer
335