[EnergyPlus_Support] SetpointManager: which node is controlled?

["ale_airone" <alessandro.venturini@xxxxxxxxxxxxxxxxxxxxxx>]

Hello,
 I am trying to simulate the simplest plant, a hot water boiler + bypass pipe attached to a load profile.

I set the water flow to split in two halves, 0.5 kg/s through the boiler, 0.5 kg/s through the bypass (have a look at the SVG).
Then I asked SetpointManager to keep the water in the Supply Outlet Node @ 60°C. I expected then that the boiler should heat the water up to about 80°C, in order to reach 60°C after mixing with the cold bypass flow.
What I find, instead, is that the node kept at 60°C is the Boiler Outlet, so that after the mixer the water gets too cold. How this? Where is the mistake?
Please find the idf input file here:

http://f1.grp.yahoofs.com/v1/oA5gS4k7UXMGATeBTsQfbIFe9MCow521F-gzv1KhCTViz8_oSLHLwJwvrTnTkOMMbCzW5-kzZ2X-LIKs74Pl5FJY53xpK7fU/_Problem_Submittals/profilo_caldaia%2Btubo.idf

many thanks

alessandro



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