Nibe S735 - Page 32

20
0 10 0 -10 -20 -30 -40
30
40
50
60
70
80
Framledningstempereratur
(°C)
Utetemperatur
(°C)
Steeper curve slope
Supply temperature
Outdoor temperature
The optimum curve slope depends on the climate conditions
in your location, whether the house has radiators, fan coils
or underfloor heating and how well insulated the house is.
The heating curve is set when the heating installation is in-
stalled, but may need adjusting later. Normally, the curve
will not need further adjustment.
CURVE OFFSET
An offset of the heating curve means that the supply tem-
perature changes by the same amount for all outdoor tem-
peratures, e.g. a curve offset of +2 steps increases the
supply temperature by 5 °C at all outdoor temperatures.
20
0 10 0 -10 -20 -30 -40
30
40
50
60
70
80
Framledningstempereratur
(°C)
Utetemperatur
(°C)
Offset heating curve
Supply temperature
Outdoor temperature
SUPPLY 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.
20
0 10 0 -10 -20 -30 -40
30
40
50
60
70
80
Framledningstempereratur
(°C)
Utetemperatur
(°C)
Maximum value
Supply temperature
Outdoor temperature
Minimum value
Caution
With underfloor heating systems, the maximum
supply temperature is normally set between 35
and 45 °C.
ADJUSTMENT OF CURVE
Curve offset
Curve coefficient
Climate system
Supply temp. °C
Outdoor temp. °C
Curve
Offset
Climate system 1
1. Select the climate system (if more than one) for which
the curve is to be changed.
2. Select curve and offset.
3. Select max and min supply temperature.
Caution
Curve 0 means that "Own curve" is used.
Settings for "Own curve" are made in menu 1.30.7.
TO READ OFF A HEATING CURVE
1. Drag in the circle on the axis with outdoor temperature.
2. Read off the value for supply temperature in the circle
on the other axis.
NIBE S735Chapter 6 | Commissioning and adjusting32