Cooling circuit and coolant properties
13.2 Coolant requirements
Booksize Power Units
780 Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
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)).
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.
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.
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.
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