Heating curve (with displacement)
Symbol
Parameterisation & usage
Both are defined through a heating curve, which are defined through points you can select. The points are defined in a standard X/Y-axis arrangement. The X-axis being the outside air temperature and the Y-axis being the water temperature.
You can use the '+' button to add points and the trashcan button to remove points where needed.
For the heating curve with displacement, there is an extra parameter added, which accounts for the feedback from the rooms (the input for the curve). Depending on the temperature needed in the room, the water temperature of the curve will be adjusted up or down based on the needs of the room. The higher the value, the harsher this effect will be.
Examples:
In the example below you see 3 zones with different displacements. In the graph the setpoint water temperature is shown. The variation is clearly seen where the needed setpoint temperature goes significantly down when heat is not needed (during the night), peaks up at start-up (about 8h) and then lower down again. The orange curve, which has no displacement, follows the external temperature without accounting for the indoor temperature.