no Connection between Demand Side and Supply Side [closed]

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hi everyone,

I'm looking to simulate refreshing an area with an IndirectResearchSpecialEvapCooler. but the problem that happens is that I have no connection between the "Demand Side" and the "Supply Side" even though I followed the step by step instructions of a similar example.

Can someone help me or direct me on how to make this connection.

thank you in advance

cordially