Setting The Heating Curve - Nibe S1155 Installer Manual

S1155 12 kW
Available pressure
(kPa)
80
70
60
50
40
30
20
10
P40%
40%
0
0,0 0,1 0,2
Readjusting, venting, heat medium side
Air is initially released from the hot water and venting
may be necessary. If gurgling sounds can be heard from
the heat pump or climate system, the entire system
requires additional venting. Check the pressure in the
pressure expansion vessel (CM1) with the pressure
gauge (BP5). If the pressure drops, the system should
be replenished.
Readjusting, venting, collector side
Expansion vessel
Check the pressure in the pressure expan-
sion vessel (CM3) with the pressure gauge
(BP6). If the pressure drops, the system
should be replenished.
Setting the heating
curve
In menu Curve, heating
for your house. The task of the curve is to give an even
indoor temperature, regardless of the outdoor temper-
ature, and thereby energy efficient operation. It is from
this curve that the S1155 determines the temperature
of the water to the climate system (the supply temper-
ature) and thus the indoor temperature.
CURVE COEFFICIENT
The slope of the heating curve indicates how many de-
grees the supply temperature is to be increased/reduced
when the outdoor temperature drops/increases. A
steeper slope means a higher supply temperature at a
certain outdoor temperature.
NIBE S1155
Output
(W)
P100%
P80%
100%
80%
P60%
60%
0,3 0,4 0,5 0,6
Flow
Flöde
(l/s)
you can view the heating curve
Supply temperature Framledningstempereratur
(°C)
80
80 70
70
60
60
50
50
40
40
30
30
20
20
10 0 10
0
The optimum curve slope depends on the climate con-
ditions 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 installed, 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
temperature is changed by the same amount for all
outdoor temperatures, e.g. a curve offset of +2 steps
increases the supply temperature by 5 °C at all outdoor
temperatures.
Supply temperature Framledningstempereratur
(°C)
80
70
60
50
40
30
20
0 10
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.
Chapter 6 | Commissioning and adjusting
Steeper curve slope
0 -10 -20 -30
Outdoor temperature
Utetemperatur
Offset heating curve
0 -10 -20 -30
Outdoor temperature
Utetemperatur
-40
(°C)
-40
(°C)
31