5.2
Heating settings
5.2.1
Heating settings, general
The indoor temperature is adjusted by changing the heat pump’s heat curve and room settings. The heat curve
is used for the controller to calculate and make sure that the heat pump supply heating, based on the outdoor
temperature. A colder outdoor temperature results in more heat being supplied to the heating system to ob-
tain a pleasant indoor temperature in any weather condition. A correctly set heat curve reduces maintenance
and saves energy.
To insure a long lifetime and avoid operational disturbances, avoid regulating heating with thermostats and
adjust the temperature on the heat pump instead. (Applies especially for system without volume or buffer
tank. )
A typical heat curve "40" is shown below, as an example. At an outdoor temperature of 0°C the target average
supply temperature will be 40 degrees with heat curve 40 (at room setting 20).
Curve adjustment curve 40 example (at room setting 20)
2 0 °
0 °
- 1 0 °
1 0 °
- 2 0 °
2 0 °
3 0 °
4 0 °
5 0 °
5 5 °
6 0 °
4 0
max 55
min 20
The illustration for heat curve 40 (red line) shows that at outdoor temperatures colder than 0°C, supply water
hotter than 40°C is sent out to the radiators. At outdoor temperatures greater than 0°C, supply water cooler
than 40°C is sent out. When the CURVE value is increased, the heat curve will become steeper and when the
value is reduced, it will become flatter. If the heat curve is set correct (normally to provide 20 degrees indoor
temperature), the room setting (at the start screen) can be used to easily adjust indoor temperature up or
down approx 1 degree / step. (For floor heating systems, heat curve 30 (black line in picture above) is shown as
example.)
User Guide
Thermia Legend
Thermia AB
BWLE01UG0102
11
