Basic Small Building with hot water radiators in open studio?

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Hello, Im a software developer and new to open studio and energy plus. I need either a guide to build a heating circuit with a boiler, a pump, maybe a valve and hot water radiators that are usually mounted to the wall. Is there a way to do this in open studio? If yes please provide an example or link.

Is there a way to output the setpoint flow temperature for each timestep?

Thanks in advance