Here you can set the max permitted number of addition-
al heat steps and binary or linear stepping. When binary
stepping is deactivated (off), the settings refer to linear
stepping.
If accessory hot water is available and additional heat
location is selected to "after QN10" the number of steps
are restricted to 2 steps linear or 3 steps binary. Output
AA7-X2:6 is reserved in this mode for additional heat in
the hot water tank.
You can also set the fuse size.
TIP
See the accessory installation instructions for
function description.
MENU 5.1.14 - FLOW SET. CLIMATE SYSTEM
presettings
Setting range: radiator, floor heat., rad. + floor heat.,
DOT °C
Default value: radiator
Setting range DOT: -40.0 – 20.0 °C
The factory setting of DOT value depends on the
country that has been given for the product's location.
The example below refers to Sweden.
Factory setting DOT: -20.0 °C
own setting
Setting range dT at DOT: 0.0 – 25.0
Factory setting dT at DOT: 10.0
Setting range DOT: -40.0 – 20.0 °C
Factory setting DOT: -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 flow
and return temperatures at dimensioned outdoor tem-
perature.
MENU 5.1.22 - HEAT PUMP TESTING
NOTE
This menu is intended for testing SMO 20 ac-
cording to different standards.
Use of this menu for other reasons may result
in your installation not functioning as intended.
This menu contains several sub-menus, one for each
standard.
MENU 5.1.23 - COMPRESSOR CURVE
Caution
This menu is only displayed if SMO 20 is con-
nected to a heat pump with inverter controlled
compressor.
Set whether the compressor in the heat pump should
work to a particular curve under specific requirements
or if it should work to predefined curves.
You set a curve for a demand (heat, hot water, cooling
etc.) by unticking "auto", turning the control knob until a
temperature is marked and pressing OK. You can now
set at what temperature max- respectively min frequen-
cies will occur.
This menu can consist of several windows (one for each
available demand), use the navigation arrows in the top
left corner to change between the windows.
MENU 5.2 - SYSTEM SETTINGS
Make different system settings for your installation here,
e.g. activate the connected heat pump and which ac-
cessories are installed.
MENU 5.2.2 - INSTALLED HEAT PUMP
If an air/water heat pump is connected to the control
module, you set it here.
MENU 5.2.4 - ACCESSORIES
Set which accessories are installed on the installation
here.
If the water heater is connected to SMO 20 hot water
charging must be activated here.
MENU 5.4 - SOFT IN/OUTPUTS
Here you can select which in/output on the terminal
block (X2) external switch function (page 25)
Selectable inputs on terminal blocks AUX 1-6 (X2:11-18
and output AA2-X4.
MENU 5.5 - FACTORY SETTING SERVICE
All settings can be reset (including settings available to
the user) to default values here.
Caution
When resetting, the start guide is displayed
the next time the control module is restarted.
MENU 5.6 - FORCED CONTROL
You can force control the different components in the
control module and any connected accessories here.
NIBE SMO 20Chapter 8 | Control40
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