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FOR THE USER
In cold weather (below -5ºC):
If you are not satisfi ed with the indoor temperature when it is colder than +5ºC
outdoors, you need to change the slope of the heat curve. This is what to do:
1. Press the Heat button in the initial menu.
2. Press the Adjust button.
3. Turn the menu dial clockwise to increase the heating.
Turn the menu dial anti-clockwise to lower the heating.
(Adjust in small increments, 0.2-0.6 units, is usually enough.)
4. Save the new value by pressing the Save button.
Basic functions - Customer level 1
Dashed line:
If the return temperature exceeds 57ºC an alarm is given and the compres-
sor switches off. The heat pump starts automatically when the return
temperature drops.
Cur ve slope:
2-4
Normal setting for fl oor heating.
4-6,5 Normal setting for radiators.
7-10 Abnormal high setting.
From the heat curve we see that
curve slope 4 gives a return tempera-
ture of +35ºC when it is 0ºC outdoors.
If the outdoor temperature drops we
can see that the return temperature
increases. The colder the outdoor
temperature the higher the return
temperature. At an outdoor tempera-
ture of approximately -30ºC we see
the curve slope has nearly reached
the limit value (+57ºC) for the return
temperature.
You should wait at least two days
when increasing or decreasing the
heating before making a new adjust-
ment.
If it is still diffi cult to get a comfort-
able indoor temperature at an outdoor
temperature around 0ºC, despite
several attempts, you should adapt the
heat curve. Read about how to “adapt
the curve” in the section
Extra func-
tions – Customer level 2 / Temperature
settings / Adapting the heat curve.
Note
Change the cur ve slope
The heat pump’s production of heating is adjusted by increasing or de-
creasing the curve slope in the Temp. incr. / decr. menu. This is especially
effective in cold weather conditions.
Return temperature (ºC)
Curve slope (0-10)
Outdoor temperature (ºC)
Temp. incr. / decr.
0 4,0 10
Return Adjust
Temp. incr. / decr.
0 5,0 10
Return Adjust
