16
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, 0.5-1.0 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 hea-
ting.
4-6,5 Normal setting for radiators.
7-10 Abnormal high setting.
From the heat curve we see that cur-
ve slope 4 gives a return temperature
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 temperature of approxima-
tely -30ºC we see the curve slope has
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.
At outdoor temperatures around 0ºC
you should “adapt the heat curve” to
obtain the desired indoor tempera-
ture. Read how to “adapt the curve” in
the section
Extra functions - Customer
level 2 / Temperature settings / Adap-
ting the heat curve.
Note
Change the cur ve slope
The heat pump’s production of heat is adjusted by increasing or decreasing
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 Save
