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Make sure that the project level is selected in the Building Structure so that the Settings button is visible.
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Click Settings.
The project level Settings opens.

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In the Material section, click on Settings....
The Settings dialog opens.

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If necessary, adjust the maximum pressure loss of the thermostatic valves and the pipe volume supplement for fittings and valves.
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Make further settings if required.
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Click Medium... to open the Medium dialog. In this dialog you can change the medium of the pipe network or, for example, adjust the viscosity of the medium.
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Click Basic conditions....
The Basic conditions dialog opens.

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If necessary, adjust the conditions for dimensioning, thermostatic and regulating valves, differential pressure closed-loop controllers and hydraulic balancing and close the dialog with OK.
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Click on Heat Interface Unit and/or Buffer Storage to make settings for heat interface units and/or the buffer storage dimensioning.
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Close the dialog Settings with OK.
You have configured the settings for the pipe network calculation of a scheme.