Operating principle

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Note that when the primary pump is not removed the pump and valve optimization is no longer supported, it is still possible to simulate the system as a reference case but the user needs to fill in the parameters.

Related models:

•  TOKEN  - NjIyfDdQUG5RWHU0 - Active mixing circuit with primary pump (demonstrates the distorted control behavior due to the primary pump)  

Design flow and temperature regime propagation

By running the action "compute design flows" all the design flows are calculated based on the power and temperature regime of the end units. In case where there are multiple types of end units (radiators, floor heating, ...) the supply temperature in regime may be different. In order to guarantee the maximum supply temperature of the floor heating the 3-way mixing valve needs to be limited in full load valve position. In the example below the 3-way mixing valve is limited to 60% valve position. 

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