Setting The Cooling/Heating Curve - Nibe SMO 20 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 (accessory required)
Setting range: 0 – 9
Default value: 0
The prescribed heating curve for your house can be
viewed in the menu heating curve
heating curve is to give an even indoor temperature, re-
gardless of the outdoor temperature, and thereby energy
efficient operation. It is from this heating curve that the
control module's control computer determines the
temperature of the water to the heating system, supply
temperature, and therefore the indoor temperature.
Select the heating curve and read off how the supply
temperature changes at different outdoor temperatures
here. If there is access to cooling the same settings can
be made for the cooling curve.
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.
SMO 20
. The task of the
Supply temperature
°C
70
Brantare kurvlutning Steeper curve slope
60
50
40
30
10 0 - 10 - 20
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 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 temperature
changes by the same amount for all the outdoor temper-
atures, 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
these temperatures.
Caution
Under floor heating systems are normally
flow line temperature
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.
To select another curve (slope):
1. Press the OK button to access the setting mode
2. Select a new curve. The curves are numbered from
0 to 15, the greater the number, the steeper the
slope and the greater the supply temperature. Curve
0 means that own curve
3. Press the OK button to exit the setting.
Chapter 6 |
- 30 - 40°C
UTETEMPERATUR
temper-
set to between 35 and
(menu 1.9.7) is used.
Commissioning and adjusting
max
27