Corrosion Inhibitor Additive (Inhibiting) - Siemens Sinamics S120 Manual

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Cooling circuit and coolant properties

13.2 Coolant requirements

Cooling circuit damage caused by seawater

The heat sink material is damaged by seawater.

• Do not use seawater as coolant.

As a general rule, tap water is not suitable for use in the cooling circuit,

although it can be mixed with de-ionized water. Losses must always be replenished with de-

ionized water.

The flow created when the heat sinks are filled results in automatic ventilation, so there is no

need for the devices to be ventilated separately.

The coolant should be checked 3 months after the cooling circuit is filled for the first time

and, subsequently, once a year. If the cooling water becomes cloudy, is colored, or becomes

contaminated by mould spores, the cooling circuit must be cleaned and refilled.

An inspection glass should be provided in the cooling circuit to make it easier to check the

cooling water.

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 803), or the water

used must be de-ionized.

Corrosion inhibitor does not need to be added if the anti-freeze Antifrogen N is used in the

right concentration (refer to Chapter Anti-Freeze Additive (Page 805))

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Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6