The heat pump is automatically calculating how much heat it has to produce to keep a comfortable indoor
climate based on the measured outdoor temperature and the settings made on the so called "heat curve" in
the heat pump display.
The temperature of the water supplied from the heat pump to the heating system is called "supply line temper-
ature" as it is the temperature that is supplied from the heat pump to the heating system.
The supply line temperature needs to be increased when the outdoor temperatures gets lower because more
heat is required from the heating system when it gets colder outside to keep the same indoor temperature.
This is what the "heat curve" makes sure.
The heat curve settings are normally adjusted by the heat pump installer, but fine tuning to the specific house
conditions and individual preferences may be required after some time to obtain desired indoor climate in all
weather conditions.
A correctly set heat curve saves energy, gives a very good indoor climate and often also reduces the need of
maintenance.
Note! It is important to regulate the indoor temperature by adjusting the temperature in the heat pump dis-
play instead of turning of the radiators by using e.g. thermostats. This way you extend the lifespan of the heat
pump and you save more money as the heat pump will run more efficient.
General guidance:
In order to increase the indoor temperature with 1 degree, the supply line temperature should often be in-
creased by 2-3°C.
(To decrease indoor temperatures, lower the temperature settings correspondingly.)
When the heat curve is set properly, the ROOM value adjustment will work as a easy adjustment to increase/
decrease the indoor temperature, affecting the indoor temperature with approx 1°C / step by changing the
supply line temperature with 3° (regardless of outdoor temperature).
For further information. See heat settings.
User Guide
Thermia Legend
Thermia AB
BWLE01UG0102
9
