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Another PI-controller (with a blue minus icon) will make sure the minimal return temperature required, 30°C in this case 30°C, is met by controlling the 3-way modulation valve.
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The user should lock the nominal thermal power and temperatures of the HP. If not, the software will calculate calculate with the propagated power and return temperature from the installation.
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There are default COP and power tables for the heat pump, but these can be changed by the user.
The user can change the design temperatures, thermal power, end units, … etc. But keep in mind that the controls have to be changed as well. This can be done by changing the setpoint values.
If the user changes the power of the end-units, the thermal capacity of the heat pump doesn’t change automatically. The user should implement a correct condenser capacity corresponded with the thermal power of the condenser.
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