Description
3.3 Accessories
Installation and Operating Instructions SINAMICS G180
Operating Instructions, 02/2019, 4BS0751-007
69
3.3.16.5
Decommissioning and shutdown
Procedure
●
In the case of long shutdown or decommissioning of the inverter, drain the water cooling.
You can find further information in the documentation 4BS0698.
●
Note that putrefaction products are produced if the cooling water does not flow and that
damage due to frost occurs if the unit is stored at temperatures below 0 °C.
NOTICE
Frost damage
Material damage can occur if the water cooling is exposed to frost without being
drained.
Drain the system in order to avoid damage. Disconnect the hoses from the connection
points. Proceed as described for the venting. For complete purging, blow compressed
air into the supply hose while the venting valve is closed until no more water exits.
The water cooling system is drained before the inverters are shipped by the manufacturer.
3.3.16.6
Cooling water additives for the closed inverter cooling with cooling unit (optional)
Use a cooling water additive for the closed cooling system of the inverter.
Siemens recommends the agent "Antifrogen N" made by Clariant as a cooling water
additive. The concentration of this additive can be adjusted to provide the required level of
frost protection.
A minimum concentration of 20 % by volume provides anti-freeze protection down to -10 °C.
An Antifrogen / water mixture of 1:2 provides anti-freeze protection down to -20 °C.
Unpolluted water mixed with a minimum concentration of 20 % by volume Antifrogen N
prevents the growth of microorganisms and the formation of algae.
If you need more detailed information and recommendations regarding cooling water
additives, please refer to your order-specific inverter documentation. For further information,
please refer to document 4BS0698.
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