TIP
It is also possible to create your own curve.
This is done in menu 1.30.7.
Caution
With underfloor heating systems, the maxim-
um supply temperature is normally set
between 35 and 45 °C.
Check the max floor temperature with your
floor supplier.
TIP
Wait 24 hours before making a new setting,
so that the room temperature has time to sta-
bilise.
If it is cold outdoors and the room temperature
is too low, increase the curve slope by one in-
crement.
If it is cold outdoors and the room temperature
is too high, lower the curve slope by one incre-
ment.
If it is warm outdoors and the room temperat-
ure is too low, increase the curve offset by one
increment.
If it is warm outdoors and the room temperat-
ure is too high, lower the curve offset by one
increment.
MENU 1.30.2 - CURVE, COOLING
(ACCESSORY REQUIRED)
Curve, cooling
Setting range: 0 – 9
In the "Curve, cooling" menu you can view the cooling
curve for your house. The task of the cooling curve is,
together with the heating curve, to provide a uniform
indoor temperature, regardless of the outdoor temper-
ature, and thereby energy-efficient operation. It is from
these curves that SMO S40 determines the temperature
of the water to the heating system, the supply temper-
ature, and consequently the indoor temperature. Here,
you can select the curve and read how the supply tem-
perature changes at different outdoor temperatures.
The number to the right of "system" shows the system
for which you have selected the curve.
Caution
Must be restricted with underfloor cooling min.
flow line temp. to prevent condensation.
Cooling in 2-pipe system
SMO S40 contains a built-in function for operating
cooling in a 2-pipe system down to 7 °C. This requires
that the outdoor module can perform cooling. (See the
Installer Manual for your air/water heat pump.) If the
outdoor module is permitted to run cooling, the cooling
menus are activated in the display on SMO S40.
For operating mode “cooling” to be permitted, the aver-
age temperature must be above the set value for “start
cooling” in menu 7.1.10.2 "Auto mode setting". The al-
ternative is to activate cooling by selecting "manual"
operating mode in menu 4.1 "Operating mode".
The cooling settings for the climate system are adjusted
in the indoor climate menu, menu 1.
MENU 1.30.3 - EXTERNAL ADJUSTMENT
Climate system
Setting range: -10 – 10
Setting range (if room sensor is installed): 5 – 30 °C
Connecting an external contact, for example, a room
thermostat or a timer allows you to temporarily or peri-
odically raise or lower the room temperature. When the
contact is on, the heat curve offset is changed by the
number of steps selected in the menu. If a room sensor
is installed and activated the desired room temperature
(°C) is set.
MENU 1.30.4 - LOWEST SUPPLY HEATING
heating
Setting range: 5 – 80 °C
Set the minimum temperature on the supply temperat-
ure to the climate system. This means that SMO S40
never calculates a temperature lower than that set here.
MENU 1.30.5 - LOWEST SUPPLY COOLING
cooling (heat pump with cooling function
required)
Depending on which cooling accessory is used, the
setting range can vary.
Setting range 7 – 30 °C
Alarm, room sensor during cooling operation
Setting range: on/off
Set the minimum temperature on the supply temperat-
ure to the climate system. This means that SMO S40
never calculates a temperature lower than that set here.
Here, you can receive alarms during cooling operation,
for example if a room sensor malfunctions.
NIBE SMO S40Chapter 9 | Control – Menus40
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