Changing The Heating Curve For Weather-Compensated Operation - Viessmann OpenTherm VITOTROL 100 OT Operating Instructions For The System User

10 Central Heating

Changing the Heating Curve for Weather-Compensated Operation

In weather-compensated operation, the room temperature is controlled according to a preset
heating curve.
If your room temperature controller acts on 2 heating circuits, a heating curve is preset for each
heating circuit.
The heating curves show the relationship between the outside temperature and the boiler water
temperature or flow temperature. The lower the outside temperature, the higher the boiler water or
flow temperature. The heating curve is limited upwards by the maximum set flow temperature. The
maximum set flow temperature can only be changed by your heating contractor
The line shows the curve for the standard room temperature. The delivered condition is shown.
The heating curve is changed with "LOW END" , "END POINT" and "SHIFT" which influences the
room temperature.
Shifting the heating curve means reducing the flow temperature for reduced mode. The value
"SHIFT" acts on both heating circuits.