Corrosion Inhibitor Additive (Inhibiting); Anti-Freeze Additive - Siemens SINAMICS S120 Manual

Cooling circuit and coolant properties
13.2 Coolant requirements
13.2.2

Corrosion Inhibitor Additive (Inhibiting)

Nalco 00GE056 (Nalco company) is recommended as anti-corrosion agent. The
concentration of anti-corrosion agent in the cooling water must be at least 2500 ppm (250
ml/100 liters cooling water).
The water quality must correspond to Chapter Coolant properties (Page 778), or the water
used must be de-ionized.
Note
Corrosion inhibitor does not need to be added if the anti-freeze Antifrogen N is used in the
right concentration (see Chapter Anti-Freeze Additive (Page 780)).
13.2.3

Anti-Freeze Additive

Antifrogen N (the Clariant company) is recommended as antifreeze. The percentage of
antifreeze must be between 20% and 30%. This ensures frost protection down to a
temperature of at least -10 °C.
NOTICE
Damage caused by overheating when using antifreeze
The cooling system no longer functions if an excessively high percentage of antifreeze is
used.
• The maximum percentage of antifreeze must not exceed 30 %.
Danger to life through electric shock caused by a cooling system leak
Cooling water mixtures with Antifrogen N are highly conductive. If the insulation does not
function, this will result in death or severe injury if you come into contact with it.
• After a coolant leak, clean the insulation system.
NOTICE
Damage to EPDM hoses as a result of additives containing oil
EPDM is destroyed by anticorrosion agents.
• When using EPDM hoses, do not use oily anticorrosion agents.
Note
Adapting the pump power
The kinematic viscosity of the cooling water is changed when adding antifreeze.
• Correspondingly adapt the pump power.
780
WARNING
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8