Nibe F370 Installer Manual page 43

Curve coefficient
The slope of the heating curve indicates how many
degrees the supply temperature is to be increased/re-
duced when the outdoor temperature drops/increases.
A steeper slope means a higher supply temperature at
a certain outdoor temperature.
Supply temperature
°C
70
Brantare kurvlutning Steeper curve slope
60
50
40
30
- 10 - 20
10 0
Outdoor temperature
The optimum slope depends on the climate conditions
in your location, if the house has radiators or under
floor heating and how well insulated the house is.
The heating curve is set when the heating installation
is installed, but may need adjusting later. Thereafter
the heating curve should not need further adjustment.
Caution
In the event of making fine adjustments for
the indoor temperature, the heat curve must
be offset up or down instead, this is done in
menu 1.1 temperature
Curve offset
An offset of the heating curve means that the supply
temperature changes as much for all the outdoor
temperatures, e.g. that a curve offset of +2 steps in-
creases the supply temperature by 5 C at all outdoor
temperatures.
Flow line temperature– maximum and minimum
values
Because the flow line temperature cannot be calculated
higher than the set maximum value or lower than the
set minimum value the heating curve flattens out at
these temperatures.
Caution
Underfloor heating systems are normally
flow line temperature
°C.
Check the max temperature for your floor with
your installer/floor supplier.
The figure at the end of the curve indicates the curve
slope. The figure beside the thermometer gives the
curve offset. Use the control knob to set a new value.
Confirm the new setting by pressing the OK button.
Curve 0 is an own heating curve created in menu 1.9.7.
NIBE™ F370
- 30 - 40°C
UTETEMPERATUR
.
max
set between 35 and 45
To select another heat curve (slope):
NOTE
If you only have one heating system, the
number of the curve is already marked when
the menu window opens.
1. Select the system (if more than one) for which the
heat curve is to be changed.
2. When the system selection has been confirmed
the heat curve number is marked.
3. Press the OK button to access the setting mode
4. Select a new heating curve. The heating curves are
numbered from 0 to 15, the greater the number,
the steeper the slope and the greater the supply
temperature. Heating curve 0 means that
curve (menu 1.9.7) is used.
5. Press the OK button to exit the setting.
To read off a heating curve:
1. Turn the control knob so that the ring on the shaft
with the outdoor temperature is marked.
2. Press the OK button.
3. Follow the grey line up to the heat curve and out
to the left to read off the value for the supply
temperature at the selected outdoor temperature.
4. You can now select to take read outs for different
outdoor temperatures by turning the control knob
to the right or left and read off the corresponding
flow temperature.
5. Press the OK or Back button to exit read off mode.
TIP
Wait 24 hours before making a new setting,
so that the room temperature has time to
stabilise.
If it is cold outdoors and the room temperature
is too low, increase the curve slope by one in-
crement.
If it is cold outdoors and the room temperature
is too high, lower the curve slope by one incre-
ment.
If it is warm outdoors and the room temperat-
ure is too low, increase the curve offset by one
increment.
If it is warm outdoors and the room temperat-
ure is too high, lower the curve offset by one
increment.
own
Chapter 8 | Control - Menus 41