Antifreeze + Biocide - Siemens SINAMICS S120 Manual

Commissioning the cooling circuit
5.2 Coolant for the internal deionized water circuit
Table 5- 4
Coolant property or limit-
Sea water
Water compliant with limit
values
Chloride
Sulfate
Dissolved solids (e.g. sand)
Total hardness
Electrical conductivity
Biological contamination
Oil residue
Mechanical contamination
Inadequate equipotential
bonding
5.2.2

Antifreeze + biocide

Table 5- 5 Overview and application of coolant additives
Antifreeze
Biocide*
Antifreeze + biocide*
* Effectiveness regarding the growth of microorganisms
118
Substances which can cause irreparable heat sink damage
value violation
Used for SINAMICS S120 Cabinet Modules
liquid cooled
Antifrogen N 20% < X ≤ 45%
Antifrogen L 25% < X ≤ 48%
Varidos FSK 25% < X ≤ 45%
Yes
Antifrogen N, minimum quantity 20%
Antifrogen L, minimum quantity 30%
Varidos FSK, minimum quantity 30%
An Antifrogen N antifreeze content of >20%
provides an adequate biocidal effect.
With Antifrogen L and Varidos FSK, 30% is
required in order to achieve the same effect.
Do not use sea water!
Use the appropriate concentration of antifreeze.
Use the appropriate concentration of antifreeze.
Dilute with de-ionized water until the sulfate content is within toler-
ance.
Rinse cooling circuit without SINAMICS devices.
Use the appropriate concentration of antifreeze.
Equipotential bonding of all circuit components.
Use of biocides, dirt traps (e.g. strainers, fine filters).
Use the appropriate concentration of antifreeze, flush cooling circuit
without SINAMICS.
Rinse cooling circuit without SINAMICS devices. Install dirt trap (e.g.
strainers, fine filters).
Connect all components to equipotential bonding system.
For Antifrogen L and Varidos FSK, for the same
antifreeze protection, a higher concentration is
required than for Antifrogen N
Countermeasure
Please note the following in particular
Cabinet Modules liquid cooled
Manual, 10/2015, A5E37067587A