Vaillant MultiMatic 700/2 - Heating Curve

multiMATIC 700/2
Notes
10/2015 69 Training 0020228700_00
Heating curve
The heating curve and the outside temperature are used as starting points for the basic
control function. Both values ensure the flow temperature necessary for the comforta-
ble heating of the area. The time programme can be adjusted to ensure that heat is
provided at the correct time.
The heat demand in a flat or house is in a certain ratio to the temperature difference
between the outside temperature and target room value. Therefore, the flow tempera-
ture required to cover the heat demand (reaching the required room temperature) can
be assigned to each outside temperature value.
This allocation, shown graphically, gives rise to the heating curve. It can vary according
to the climate zone, building type, heating system and individual customer require-
ments.
An optimum heating curve setting may require several corrections in the course of be-
ing determined, if the desired room temperature is not achieved as the outside temper-
atures vary. To this end the gradient of the heating curve can be adjusted (0.1 to 4.0)
and shifted in parallel.
The modifiable heating curves are shown below:
Recommendation: The heating curve should be selected on the basis of the system
temperature of the heating circuit and the normal outside temperature.
Example: System temperature of the heating circuit: 55/45 °C
Normal outside temperature: 0 °C
Heating curve: 1.5
Flow temperature: 55 °C
Flow temperature
In °C
Outside temperature in
°C
Heating
curves