Setting The Cooling/Heating Curve - Nibe F1255PC BE Installer Manual

Setting the
cooling/heating curve
heating curve 1.9.1.1
system
flow temperature °C
outdoor temp. °C
cooling curve 1.9.1.2
system
flow temperature °C
outdoor temp. °C
HEATING CURVE
Setting range: 0 – 15
Default value: 9
COOLING CURVE
Setting range: 0 – 9
Default value: 0
You can select heating or cooling in the
The next menu (heating curve/cooling curve) shows the
heating and cooling curves for your house. The task of
the curve is to give an even indoor temperature, regard-
less of the outdoor temperature, and thereby energy
efficient operation. It is from these heat curves that the
heat pump's control computer determines the temper-
ature of the water to the system, the supply temperat-
ure, and therefore the indoor temperature. Select the
curve and read off how the supply temperature changes
at different outdoor temperatures here. The number to
the far right of "system" displays which system you have
selected the heating curve/cooling curve for.
CURVE COEFFICIENT
The slopes of the heating /cooling curves indicate how
many degrees the supply temperature is to be in-
creased/reduced when the outdoor temperature
drops/increases. A steeper slope means a higher supply
temperature for heating or a lower supply temperature
for cooling at a certain outdoor temperature.
34 Chapter 6 | Commissioning and adjusting
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 curve is set when the heating installation is installed,
but may need adjusting later. Normally, the curve will
not need further adjustment.
Caution
When making fine adjustments of the indoor
temperature, the curve must be offset up or
down instead, this is done in menu 1.1
ature
CURVE OFFSET
An offset of the curve means that the supply temperat-
ure changes as much for all the outdoor temperatures,
e.g. that a curve offset of +2 steps increases 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
curve menu.
these temperatures.
Caution
With underfloor heating systems,
line temperature
between 35 and 45 °C.
Must be restricted with underfloor cooling min.
flow line temp. to prevent condensation.
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 curve created in menu 1.9.7.
Supply temperature Framledningstempereratur
(°C)
80
70
Steeper curve slope
60
50
40
30
20
0 10 0 -10 -20
Outdoor temperature
.
should normally be set to
-30 -40
Utetemperatur
(°C)
temper-
max flow
NIBE F1255PC BE