TIP
It is also possible to create your own curve. This
is done in menu 1.30.7.
Caution
With underfloor heating systems, the maximum
supply temperature is normally set between 35
and 45 °C.
TIP
If the room temperature is constantly too low/high,
you increase/decrease the curve offset by one
step.
If the room temperature changes when the out-
door temperature changes, you increase/decrease
the curve slope by one step.
Wait 24 hours before making a new setting, so that
the room temperature has time to stabilise.
MENU 1.30.3 - EXTERNAL ADJUSTMENT
External adjustment
Setting range: -10 – 10
Setting range (if room sensor is installed): 5 – 30 °C
Connecting an external switch, for example a room thermo-
stat or a timer, allows you to raise or lower the room temper-
ature temporarily or periodically. When the switch is on, the
heating curve offset is changed by the number of steps se-
lected in the menu. If a room sensor is installed and activ-
ated, the desired room temperature (°C) is set.
If there is more than one climate system and/or more than
one zone, the setting can be made separately for each sys-
tem and zone.
MENU 1.30.4 - LOWEST SUPPLY HEATING
Heating
Setting range: 5 – 80 °C
Set the minimum temperature on the supply temperature
to the climate system. This means that S1256 never calcu-
lates a temperature lower than that set here.
If there is more than one climate system the setting can be
made separately for each system.
MENU 1.30.6 - HIGHEST SUPPLY HEAT
Climate system
Setting range: 5 – 80 °C
Here, you set the highest supply temperature for the climate
system. This means that S1256 never calculates a temper-
ature higher than the one set here.
If there is more than one climate system the setting can be
made separately for each system. Climate systems 2 – 8
cannot be set to a higher max supply temperature than cli-
mate system 1.
Caution
With underfloor heating systems, "Maximum supply
temperature for heating" should normally be set
between 35 and 45°C.
MENU 1.30.7 - OWN CURVE
Own curve, heat
Supply temp
Setting range: 5 – 80 °C
Caution
Curve 0 must be selected for own curve to apply.
You can create your own heating curve here, if there are
special requirements, by setting the desired supply temper-
atures for different outdoor temperatures.
MENU 1.30.8 - POINT OFFSET
Outdoor temp. point
Setting range: -40 – 30 °C
Change in curve
Setting range: -10 – 10 °C
Select a change in the heating curve at a certain outdoor
temperature here. One step is usually enough to change the
room temperature by one degree, but in some cases several
steps may be required.
The heating curve is affected at ± 5°C from set outdoor
temp. point.
It is important that the correct heating curve is selected so
that the room temperature is experienced as even.
TIP
If it feels cold in the house at e.g. -2°C, "outdoor
temp. point" is set to "-2" and "change in curve" is
increased until the desired room temperature is
maintained.
Caution
Wait 24 hours before making a new setting, so that
the room temperature has time to stabilise.
43Chapter 9 | Control - MenusNIBE S1256
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