Select this option if shunt controlled additional heat is
connected.
Here, you set when the additional heat is to start, the
minimum operating time and the minimum temperature
for external additional heat with shunt. External addition-
al heat with shunt is, for example, a log or pellet boiler.
You can set shunt valve amplification and shunt valve
waiting time.
If you select "Prioritised additional heat", the heat from
the external additional heat is used instead of the heat
pump. The shunt adjusts for as long as heat is available,
otherwise the shunt is closed.
MENU 7.1.6 - HEATING
This menu contains sub-menus where you can make
advanced settings for heating operation.
MENU 7.1.6.1 - MAX DIFFERENCE SUPPLY
TEMPERATURE
Max difference compressor
Setting range: 1 – 25 °C
Max difference additional heat
Setting range: 1 – 24 °C
BT12 offset heat pump 1 – 8
Setting range: -5 – 5°C
Here you set the maximum permitted difference
between the calculated and actual supply temperature
in the event of compressor or additional heat mode re-
spectively. Max difference additional heat can never
exceed max difference compressor
Max. difference, compressor: If the current supply
temperature exceeds the calculated supply by the set
value, the degree minute value is set to +1. The com-
pressor in the heat pump stops if there is only a heating
demand.
Max difference additional heat: If "Additional heat" is
selected and activated in menu 4.1 and the current
supply temperature exceeds the calculated temperature
by the set value, the additional heat is forced to stop.
BT12 offset: If there is a difference between temperat-
ure sensor, heating medium supply (BT25), and temper-
ature sensor, condenser supply (BT12), you can set a
fixed offset here to compensate for the difference.
MENU 7.1.6.2 - FLOW SETTING, CLIMATE
SYSTEM
Setting
Alternative: radiator, floor heat., rad. + floor heat.,
Own setting
Setting range DOT: -40.0 – 20.0 °C
Own setting
Setting range dT at DOT 0.0 – 25.0
Setting range DOT: -40.0 – 20.0°C
The type of heating distribution system the heating
medium pump works towards is set here.
dT at DOT is the difference in degrees between supply
and return temperatures at design outdoor temperature.
MENU 7.1.6.3 - POWER AT DOT
Alternative: Manually selected power at DOT, Power
at DOT
Manually selected power at DOT
Setting range: on/off
Power at DOT
Setting range: 1 – 1,000 kW
Here, you set the power the property requires at DOT
(dimensioned outdoor temperature).
If you choose not to activate "Manually selected power
at DOT", the setting is made automatically, i.e. SMO S40
selects suitable power at DOT.
MENU 7.1.6.4 - HUMIDITY CONTROL
Here you can activate Humidity control, controlled by
the relative humidity (RH) of the air, during heating oper-
ation. Only shown if a moisture sensor is installed
MENU 7.1.7 - COOLING (HEAT PUMP WITH
COOLING FUNCTION REQUIRED)
This menu contains sub-menus where you can make
advanced settings for cooling operation.
MENU 7.1.7.1 - COOLING SETTINGS
Max. compressors in active cooling
Setting range: 1 – max number
Super cooling
Setting range: on/off
Max. compressors in active cooling
Set the max number of compressors that may be used
for cooling in those cases where several compressors
are available here.
NIBE SMO S40Chapter 9 | Control – Menus54
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