Nibe SMO S40 Installer Manual page 41

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 temper-
ature, regardless of the outdoor temperature, 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 temperature, and consequently
the indoor temperature. Here, you can select the curve and
read how the supply temperature changes at different out-
door 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 out-
door unit can perform cooling. (See the Installer Manual for
your air/water heat pump.) If the outdoor module is permit-
ted to run cooling, the cooling menus are activated in the
display on SMO S40.
For operating mode "cooling" to be permitted, the average
temperature must be above the set value for "start cooling"
in menu 7.1.10.2 "Auto mode setting". The alternative 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 ther-
mostat or a timer allows you to temporarily or periodically
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 activ-
ated the desired room temperature (°C) is set.
If there is more than one climate system, the setting can be
made separately for each system 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 SMO S40 never cal-
culates a temperature lower than that set here.
If there is more than one climate system the setting can be
made separately for each system.
NIBE SMO S40
MENU 1.30.5 - LOWEST SUPPLY COOLING
cooling (heat pump with cooling function
required)
Setting range 7 – 30 °C
Alarm, room sensor during cooling
operation
Setting range: on/off
Set the minimum temperature on the supply temperature
to the climate system. This means that SMO S40 never cal-
culates a temperature lower than that set here.
If there is more than one climate system the setting can be
made separately for each system.
Here, you can receive alarms during cooling operation, for
example if a room sensor malfunctions.
NOTE
Cooling flow line must be set with regard to which
climate system is connected. For example, floor
cooling with too low cooling flow line can cause
condensation precipitation, which in the worst in-
stance could lead to moisture damage.
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 SMO S40 never calculates a tem-
perature 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.
Chapter 9 | Control – Menus 41