Nibe SMO 20 User manual

User manual
Control module
NIBE SMO 20 UK
UHB EN 2333-2
731342

Quick guide
Navigation Ok button (confirm/select)
Back button (back/undo/exit)
Control knob (move/increase/reduce)
A detailed explanation of the button functions can be found on page 7.
How to scroll through menus and make different settings is described on page 9.
temperature 1.1
Set the indoor climate
2X
INDOOR CLIMATE
HOT WATER
INFO
HEAT PUMP
The mode for setting the indoor temperature is accessed by pressing the OK button twice, when in the start mode in
the main menu. Read more about the settings on page 13.
INDOOR CLIMATE
HOT WATER
INFO
HEAT PUMP
off
temporary lux 2.1
3 hrs
6 hrs
12 hrs
one time
increase
Increase hot water volume
2X
1X
To increase the amount of hot water temporarily (if a water heater is installed for your SMO 20), first turn the control
knob to select menu 2 (water droplet) and then press the OK button twice. Read more about the settings on page
temporary lux.
In event of disturbances in comfort
If you experience any disturbance in comfort, there are some measures you can take yourself before you need to contact
your installer. See section "Disturbances in comfort" for instructions.

41 Important information
4Installation data
5Safety information
6SMO 20 – An excellent choice
7
2 The control module – the heart of the
house
7Control module's function
7Contact with SMO 20
11Maintenance of SMO 20
123 myUplink
12Specification
12Connection
12Range of services
134 SMO 20 – at your service
13Set the indoor climate
20Set the hot water capacity
22Get information
24Adjust the heat pump
325 Disturbances in comfort
32Info-menu
32Manage alarm
32
33Add. heat only
356 Technical data
367 Glossary
39Contact information
3Table of ContentsNIBE SMO 20
Table of Contents

Installation data
SMO 20Product
Serial number
Serial number, heat pump
Installation date
Installer
Type of docking
Accumulator/
water heater
Heat pump/
capacity
Add. heat type/power
SetDefaultset-
tings
NameNo.
0 / 9heating curve (offset/curve
slope)
1.9.1
Serial number must always be given.
Certification that the installation is carried out according to instructions in
the accompanying installer manual and applicable regulations.
____________________________________________________________Signed____________________________________________Date
NIBE SMO 20Chapter 1 | Important information4
Important information

Safety information
This appliance can be used by children
aged from 8 years and above and per-
sons with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning use
of the appliance in a safe way and under-
stand the hazards involved. Children shall
not play with the appliance. Cleaning and
user maintenance shall not be made by
children without supervision.
This is an original manual. It may not be
translated without the approval of NIBE.
Rights to make any design or technical
modifications are reserved.
©NIBE 2023.
SMO 20 must be installed via an isolator
switch. The cable area has to be dimen-
sioned based on the fuse rating used.
SYMBOLS
Explanation of symbols that may be present in this manual.
NOTE
This symbol indicates danger to person or machine.
Caution
This symbol indicates important information about
what you should observe when maintaining your
installation.
TIP
This symbol indicates tips on how to facilitate us-
ing the product.
SERIAL NUMBER
The serial number can be found on the top of the cover for
the control module and in the info menu (menu 3.1).
LEK
Serial number
Caution
You need the product's (14 digit) serial number for
servicing and support.
5Chapter 1 | Important informationNIBE SMO 20

COUNTRY SPECIFIC INFORMATION
United Kingdom
This installation is subject to building regulation approval,
notify the local Authority of intention to install.
Use only manufacturer’s recommended replacement parts.
For more information see nibe.co.uk.
Warranty and insurance information
Thank you for installing a new NIBE heat pump in your home.
NIBE heat pumps are manufactured in Sweden to the very
highest standard so we are pleased to offer our customers
a comprehensive guarantee.
The product is guaranteed for 24 months for parts and la-
bour from the date of installation or 33 months from the
date of manufacture, whichever is the shorter.
The NIBE guarantee is based on the unit being installed and
commissioned by a NIBE accredited installer, serviced every
year and the Benchmark documents completed. Where this
condition is not met, any chargeable spare parts or compon-
ents issued within the applicable guarantee period still be-
nefit from a 12 month warranty from the date of issue by
the manufacturer.
We recommend the installer completes and returns as soon
as possible, your guarantee registration card or completes
the guarantee form on the NIBE website, www.nibe.co.uk
Please ensure that the installer has fully completed the
Benchmark Checklist in the end of the Installation Instruc-
tions supplied with the product and that you have signed
to say that you have received a full and clear explanation of
its operation. The installer is legally required to complete a
commissioning checklist as a means of complying with the
appropriate Building Regulations (England and Wales).
All installations must be notified to Local Area Building
Control either directly or through a Competent Persons
Scheme. A Building Regulations Compliance Certificate will
then be issued to the customer who should, on receipt, write
the Notification Number on the Benchmark Checklist.
This product should be serviced regularly to optimise its
safety, efficiency and performance. The service engineer
should complete the relevant Service Record on the
Benchmark Checklist after each service.
The Benchmark Checklist may be required in the event of
any warranty work and as supporting documentation relating
to home improvements in the optional documents section
of the Home Information Pack.
SMO 20 – An excellent choice
SMO 20 is a control module, which has been introduced to
supply your home with environmentally friendly heating in
the most efficient way. Heat production is reliable and eco-
nomical with a NIBE air/water heat pump and accumulat-
or/water heater.
Additional heat (for example electric/gas boiler) can engage
automatically if something unexpected should occur or as
emergency operation.
EXCELLENT PROPERTIES FOR SMO 20:
•Easy to read display
The control module has an easy to read display with easy-
to-understand menus that facilitate setting a comfortable
indoor climate.
•Easy to install
SMO 20 is easy to install together with a compatible NIBE
air/water heat pump. When installing, the control module
is connected to the heat pump, which enables you to see
any heat pump alarms in SMO 20. The size of the control
module means that it can be installed on indoor walls for
easy access to control your installation.
NIBE SMO 20Chapter 1 | Important information6

Control module's function
SMO 20 is a simple control module, which, together with an
NIBE air/water heat pump, accumulator/water heater and
additional heating (e.g. electric/gas boiler), creates a com-
plete installation. Among other things, it controls the heat
pump, circulation pumps, reversing valves and step-con-
trolled additional heat to supply your home with environment-
ally friendly heating in the most efficient way.
Contact with SMO 20
DISPLAY UNIT
A
B
C
D
E
F
Display
Status lamp
OK button
Back button
Control knob
Switch
INDOOR CLIMATE
HOT WATER
INFO
HEAT PUMP
SMO20 GUSB port
There is a display unit on the front of the control module,
which is used to communicate with SMO 20. Here you:
•switch on, switch off or set the installation to emergency
mode.
•set the indoor climate and hot water as well as adjust the
installation to your needs.
•receive information about settings, status and events.
•see different types of alarms and receive instructions
about how they are to be rectified.
Display
Instructions, settings and operational information are
shown on the display. You can easily navigate between
the different menus and options to set the comfort or
obtain the information you require.
A
Status lamp
The status lamp indicates the status of the control
module. It:
•lights green during normal operation.
•lights yellow in emergency mode.
•lights red in the event of a deployed alarm.
B
OK button
The OK button is used to:
•confirm selections of sub menus/options/set val-
ues/page in the start guide.
C
Back button
The back button is used to:
•go back to the previous menu.
•change a setting that has not been confirmed.
D
Control knob
The control knob can be turned to the right or left. You
can:
•scroll in menus and between options.
•increase and decrease the values.
•change page in multiple page instructions (for example
help text and service info).
E
Switch
The switch assumes three positions:
•On ()
•Standby ( )
•Emergency mode ( )
The emergency mode must only be used in the event of
a fault in the control module. In this mode, the com-
pressor in the heat pump switches off and any immersion
heater engages. The control module display is not lit and
the status lamp shines yellow.
F
USB port
The USB port is hidden beneath the plastic badge with
the product name on it.
The USB port is used to update the software.
Visit myuplink.com and click the "Software" tab to
download the latest software for your installation.
G
7Chapter 2 | The control module – the heart of the houseNIBE SMO 20
The control module – the heart of the
house

MENU SYSTEM
INDOOR CLIMATE
HOT WATER
INFO
HEAT PUMP
Indoor
temperature - (if
room sensors are
installed)
Hot water temp.
Temporary lux (if
activated)
Outdoor
temperature
Estimated amount
of hot water
MENU 1 - INDOOR CLIMATE
Setting and scheduling the indoor climate. See page 13.
MENU 2 - HOT WATER
Setting and scheduling hot water production. See page 20.
This menu only appears if a water heater is installed in the
system.
MENU 3 - INFO
Display of temperature and other operating information and
access to the alarm log. See page 22.
MENU 4 - MY SYSTEM
Setting time, date, language, display, operating mode etc.
See page 24.
Symbols in the display
The following symbols may appear on the display during
operation.
DescriptionSymbol
This symbol appears by the information sign if
there is information in menu 3.1 that you should
note.
These two symbols indicate if the compressor in
the outdoor module or the additional heat in the
installation is blocked via SMO 20.
These can, for example, be blocked depending on
which operating mode is selected in menu 4.2, if
blocking is scheduled in menu 4.9.5 or if an alarm
has occurred that blocks one of them.
Blocking the compressor.
Blocking additional heat.
This symbol appears if periodic increase or lux
mode for the hot water is activated.
This symbol indicates whether "holiday setting" is
active in 4.7.
This symbol indicates whether SMO 20 has contact
with myUplink.
This symbol is visible in installations with active
solar accessories.
This symbol indicates whether cooling is active.
Heat pump with cooling function required.
NIBE SMO 20Chapter 2 | The control module – the heart of the house8

INDOOR CLIMATE
HOT WATER
INFO
HEAT PUMP
temperature
INDOOR CLIMATE 1
advanced
scheduling off
Marked main menu
Menu number – marked sub menu Name and menu number – main menu
Symbol – main
menu
Status information – sub
menus
Name – sub menusSymbols – sub menus
Operation
To move the cursor, turn the control knob to the
left or the right. The marked position is brighter
and/or has a light frame.
Selecting menu
To advance in the menu system select a main menu by
marking it and then pressing the OK button. A new window
then opens with sub menus.
Select one of the sub menus by marking it and then pressing
the OK button.
Selecting options
economy
comfort mode 2.2
normal
luxury
smart control
In an options menu the current selected option is indic-
ated by a green tick.
To select another option:
1. Mark the applicable option. One of the options is
pre-selected (white).
2. Press the OK button to confirm the selected option.
The selected option has a green tick.
Setting a value
time & date 4.4
time
day
year
month
24 h
12 h
date
Values to be changed
To set a value:
1. Mark the value you want to set using the control
knob.
2. Press the OK button. The background of the value
becomes green, which means that you have ac-
cessed the setting mode.
3. Turn the control knob to the right to increase the
value and to the left to reduce the value.
4. Press the OK button to confirm the value you
have set. To change and return to the original
value, press the Back button.
9Chapter 2 | The control module – the heart of the houseNIBE SMO 20

Use the virtual keyboard
Different keyboards
In some menus where text may require entering, a virtual
keyboard is available.
Depending on the menu, you can gain access to different
character sets which you can select using the control knob.
To change character table, press the Back button. If a menu
only has one character set the keyboard is displayed directly.
When you have finished writing, mark "OK” and press the OK
button.
Scroll through the windows
A menu can consist of several windows. Turn the control
knob to scroll between the windows.
Current menu
window
Number of
windows in the
menu
Scroll through the windows in the start guide
language 4.6
If the start guide is left on this page it
closes automatically in
60 min
Arrows to scroll through window in start guide
1. Turn the control knob until one of the arrows in the top
left corner (at the page number) has been marked.
2. Press the OK button to skip between the steps in the
start guide.
Help menu
In many menus there is a symbol that indicates that
extra help is available.
To access the help text:
1. Use the control knob to select the help symbol.
2. Press the OK button.
The help text often consists of several windows that you
can scroll between using the control knob.
NIBE SMO 20Chapter 2 | The control module – the heart of the house10

Maintenance of SMO 20
REGULAR CHECKS
All servicing must be carried out by a person competent for
the job.
Your heat pump requires minimal maintenance after com-
missioning. On the other hand, it is recommended that you
check your installation regularly. For more information re-
garding the maintenance of heat pumps and/or accumulator
tanks/water heaters, refer to the relevant manual.
If anything unusual occurs, messages about the malfunction
appear in the display in the form of various alarm texts. See
alarm management on page 32.
SAVING TIPS
Your installation produces heat and hot water. This occurs
via the control settings you made.
Factors that affect the energy consumption are, for example,
indoor temperature, hot water consumption, the insulation
level of the house and whether the house has many large
window surfaces. The position of the house, e.g. wind expos-
ure is also an affecting factor.
Also remember:
•Open the thermostat valves completely (except in rooms
where you want it to be cooler). This is important, as fully
or partially closed thermostat valves slow the flow in the
climate system, which results in the installation working
at a higher temperature. This in turn can lead to increased
energy consumption.
•You can lower the operating cost when away from home
by scheduling selected parts of the system. This is done
in menu 4.7 "holiday setting". See page 28 for instructions.
•If you activate "economy" in menu 2.2 "comfort mode",
less energy is used.
Power consumption
Energiförbrukning fördelat över året
0%
5%
10%
15%
20%
25%
jan feb mars april maj juni juli aug sep okt nov dec
Månad
% av årsförbrukningen
Month
Jan Feb Mar April May June July Aug Sep Oct Nov Dec
% of annual
consumption
Increasing the indoor temperature by 1°C increases power
consumption by approx. 5%.
11Chapter 2 | The control module – the heart of the houseNIBE SMO 20

With myUplink you can control the installation – where and
when you want. In the event of any malfunction, you receive
an alarm directly to your e-mail or a push notification to the
myUplink app, which allows you to take prompt action.
Visit myuplink.com for more information.
Update your system to the latest software version.
Caution
Before you can start using myUplink, the product
has to be installed and set up according to the in-
structions in the Installer Manual.
Specification
You need the following in order for myUplink to be able to
communicate with your SMO 20:
•network cable
•Internet connection
•account on myuplink.com
We recommend our mobile apps for myUplink.
Connection
To connect your system to myUplink:
1. Select connection type (wifi/Ethernet) in menu 4.1.3 -
internet.
2. Mark “request new connection string" and press the OK
button.
3. When a connection string has been produced, it is shown
in this menu and is valid for 60 minutes.
4. If you do not already have an account, register in the
mobile app or on myuplink.com.
5. Use the connection string to connect your installation
to your user account on myUplink.
Range of services
myUplink gives you access to various levels of service. The
base level is included and, apart from this, you can choose
two premium services for a fixed annual fee (the fee varies
depending on the functions selected).
Premium
change set-
tings
Premium ex-
tended his-
tory
BasicService level
XXXViewer
XXXAlarm
XXXHistory
-X-Extended history
X--Manage
NIBE SMO 20Chapter 3 | myUplink12
myUplink

Set the indoor climate
OVERVIEW
Sub-menus
temperature
INDOOR CLIMATE 1
advanced
scheduling off
For the menu INDOOR CLIMATE there are several sub-
menus. Status information for the relevant menu can be
found on the display to the right of the menus.
temperature Setting the temperature for the climate sys-
tem. The status information shows the set values for the
climate system.
scheduling Scheduling heating and cooling. Status inform-
ation "set" is displayed if you set a schedule but it is not
active now, "holiday setting" is displayed if the vacation
schedule is active at the same time as the schedule (the
vacation function is prioritised), "active" displays if any part
of the schedule is active, otherwise it displays " off".
advanced Setting of heat curve, adjusting with external
contact, minimum value for supply temperature, room sensor
and cooling function.
MENU 1.1 - TEMPERATURE
temperature 1.1.1
temperature cooling 1.1.2
Accessories are required to control the climate system using
room sensors. If you choose Menu 1.1 and do not have the
cooling accessory, you come directly to Menu 1.1.1.
Choose between heating or cooling and then set the desired
temperature in the next menu "temperature heating/cooling"
in menu 1.1.
Set the temperature (with room sensor
installed and activated):
heating
Setting range: 5 – 30 °C
Default value: 20
cooling (accessory required)
Setting range: 5 – 30 °C
Default value: 25
The value in the display appears as a temperature in °C if
the climate system is controlled by a room sensor.
Caution
A slow heating system such as underfloor heating
may not be suitable for control using the control
module’s room sensors.
To change the room temperature, use the control knob to
set the desired temperature in the display. Confirm the new
setting by pressing the OK button. The new temperature is
shown on the right-hand side of the symbol in the display.
Setting the temperature (without room
sensors activated):
Setting range: -10 to +10
Default value: 0
The display shows the set values for heating (curve offset).
To raise or lower the indoor temperature, increase or reduce
the value on the display.
13Chapter 4 | SMO 20 – at your serviceNIBE SMO 20
SMO 20 – at your service

Use the control knob to set a new value. Confirm the new
setting by pressing the OK button.
The number of steps the value has to be changed to achieve
a degree change of the indoor temperature depends on the
heating installation. One step is usually enough but in some
cases several steps may be required.
Setting the desired value. The new value is shown on the
right-hand side of the symbol in the display.
Caution
An increase in the room temperature can be
slowed by the thermostats for the radiators or
under floor heating. Therefore, open the thermo-
stats fully, except in those rooms where a cooler
temperature is required, e.g. bedrooms.
TIP
Wait 24 hours before making a new setting, so that
the room temperature has time to stabilise.
If it is cold outdoors and the room temperature is
too low, increase the curve slope in menu 1.9.1.1
by one increment.
If it is cold outdoors and the room temperature is
too high, reduce the curve slope in menu 1.9.1.1 by
one increment.
If it is warm outdoors and the room temperature
is too low, increase the value in menu 1.1.1 by one
increment.
If it is warm outdoors and the room temperature
is too high, reduce the value in menu 1.1.1 by one
increment.
MENU 1.3 - SCHEDULING
scheduling 1.3
cooling off
heating off
In the menu scheduling indoor climate (heating/cooling)
is scheduled for each weekday.
You can also schedule a longer time during a selected period
(holiday) in menu 4.7.
MENU 1.3.1 - HEATING
Increases or decreases in the accommodation temperature
can be scheduled here for up to three time periods per day.
One step is usually enough to change the room temperature
by one degree, but in some cases several steps may be re-
quired.
If a room sensor is installed and activated, the desired room
temperature (°C) is set during the time periods.
SCHEDULING HEATING 1.3.1
activated
schedule 2 schedule 3schedule 1
all
mon
tues
wed
thur
fri
sat
sun
21:30 -
06:00 20.5°
Time period AdjustingDay
Activated Schedule
Conflict
Schedule: The schedule to be changed is selected here.
Activated: Scheduling for the selected period is activated
here. Set times are not affected at deactivation.
Day: Select which day or days of the week the scheduling
is to apply to here. To remove the scheduling for a particular
day, the time for that day must be reset by setting the start
time to the same as the stop time. If the row "all" is used, all
days in the period are set according to that row.
Time period: The start and stop time for the selected day
for scheduling are selected here.
Adjustment: How much the heating curve is to be offset in
relation to menu 1.1 during scheduling is set here. If a room
sensor is installed, the desired room temperature is set in
°C.
Conflict: If two settings conflict with each other, a red ex-
clamation mark is displayed.
TIP
If you wish to set similar scheduling for every day
of the week start by filling in “all” and then chan-
ging the desired days.
TIP
Set the stop time earlier than the start time so that
the period extends beyond midnight. Scheduling
then stops at the set stop time the day after.
Scheduling always starts on the date that the start
time is set for.
NIBE SMO 20Chapter 4 | SMO 20 – at your service14

Caution
Changes of temperature in accommodation take
time. For example, short time periods in combina-
tion with underfloor heating will not give a notice-
able difference in room temperature.
MENU 1.3.2 - COOLING
Here you can schedule when cooling is permitted in the ac-
commodation for up to two different time periods per day.
SCHEDULING COOLING 1.3.2
activated
schedule 2schedule 1
all
mon
tues
wed
thur
fri
sat
sun
21:30 -
06:00 on
Activated Schedule
Time period AdjustingDay Conflict
Schedule: The schedule to be changed is selected here.
Activated: Scheduling for the selected period is activated
here. Set times are not affected at deactivation.
Day: Select which day or days of the week the scheduling
is to apply to here. To remove the scheduling for a particular
day, the time for that day must be reset by setting the start
time to the same as the stop time. If the row "all" is used, all
days in the period are set according to that row.
Time period: The start and stop time for the selected day
for scheduling are selected here.
Adjustment: Here, you schedule when cooling will not be
permitted.
Conflict: If two settings conflict with each other, a red ex-
clamation mark is displayed.
TIP
If you wish to set similar scheduling for every day
of the week start by filling in “all” and then chan-
ging the desired days.
TIP
Set the stop time earlier than the start time so that
the period extends beyond midnight. Scheduling
then stops at the set stop time the day after.
Scheduling always starts on the date that the start
time is set for.
MENU 1.9 - ADVANCED
advanced 1.9
curve
external adjustment
min. flow line temp.
room sensor settings
cooling settings
own curve
Menu advanced is intended for the advanced user. This
menu has several sub-menus.
curve Setting the curve slope for heating and cooling.
external adjustment Setting the heat curve offset when
the external contact is connected.
min. flow line temp. Setting minimum permitted flow line
temperature.
room sensor settings Settings regarding the room sensor.
cooling settings Settings for cooling.
own curve Setting own curve for heating and cooling.
point offset Setting the offset of the heating curve or
cooling curve at a specific outdoor temperature.
MENU 1.9.1 - CURVE
heating curve
Setting range: 0 – 15
Default value: 9
cooling curve (accessory required)
Setting range: 0 – 9
Default value: 0
15Chapter 4 | SMO 20 – at your serviceNIBE SMO 20

heating curve 1.9.1.1
outdoor temp. °C
flow temperature °C
cooling curve 1.9.1.2
outdoor temp. °C
flow temperature °C
The prescribed heating curve for your house can be viewed
in the menu heating curve . The task of the heating curve
is to give an even indoor temperature, regardless of the
outdoor temperature, and thereby energy efficient operation.
It is from this heating curve that the control module's control
computer determines the temperature of the water to the
heating system, supply temperature, and therefore the in-
door temperature. Select the heating curve and read off
how the supply temperature changes at different outdoor
temperatures here. If there is access to cooling the same
settings can be made for the cooling curve.
Caution
With underfloor heating systems, max flow line
temperature should normally be set to between
35 and 45 °C.
With underfloor cooling, "min. flow line temp." must
be restricted to prevent condensation.
Check the max temperature for your floor with
your installer/floor supplier.
TIP
Wait 24 hours before making a new setting, so that
the room temperature has time to stabilise.
If it is cold outdoors and the room temperature is
too low, increase the curve slope by one incre-
ment.
If it is cold outdoors and the room temperature is
too high, lower the curve slope by one increment.
If it is warm outdoors and the room temperature
is too low, increase the curve offset by one incre-
ment.
If it is warm outdoors and the room temperature
is too high, lower the curve offset by one incre-
ment.
Cooling in 2-pipe system
SMO 20 contains a built-in function for operating cooling in
a 2-pipe system down to 7 °C, factory setting 18 °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 20.
In order for operating mode “cooling” to be permitted, the
average temperature must be above the setting value for
“start cooling” in menu 4.9.2
The cooling settings for the climate system are adjusted in
the indoor climate menu, menu 1.
MENU 1.9.2 - EXTERNAL ADJUSTMENT
Set the temperature (with room sensor
installed and activated):
Setting range: 5 – 30 °C
Default value: 20
Setting the temperature (without room
sensors activated):
Setting range: -10 to +10.
Default value: 0
climate system 1
external adjustment 1.9.2
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 while heating. When
NIBE SMO 20Chapter 4 | SMO 20 – at your service16

the contact is on, the heating 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 1.9.3 - MIN. FLOW LINE TEMP.
heating
Setting range: 5-70 °C
Default value: 20 °C
cooling (heat pump with cooling function
required)
Depending on which cooling function (in 2-pipe system
or 4-pipe system) is used, the lower limit of the setting
range can vary from 7 to 18 °C.
Setting range: 7-30 °C
Factory setting: 18 °C
climate system 1 °C
min. flow line temp. heating 1.9.3.1
In menu 1.9.3 you select heating or cooling, in the next menu
(min. supply temp.heating/cooling) set the minimum tem-
perature on the supply temperature to the climate system.
This means that SMO 20 never calculates a temperature
lower than that set here.
If there is more than one climate system the setting can be
made separately for each system.
TIP
The value can be increased if you have, for ex-
ample, a cellar that you always want to heat, even
in summer.
You may also need to increase the value in "stop
heating" menu 4.9.2 "auto mode setting".
MENU 1.9.4 - ROOM SENSOR SETTINGS
factor system
heating
Setting range: 0.0 - 6.0
Factory setting heating: 1.0
cooling (accessory required)
Setting range: 0.0 - 6.0
Factory setting cooling: 1.0
room sensor settings1.9.4
control room sensor syst
room sensor settings 1.9.4
Room sensors to control the room temperature can be activ-
ated here.
Caution
A slow heating system such as underfloor heating
may not be suitable for control using the installa-
tion’s room sensors.
Here you can set a factor (a numerical value) that determines
how much an over or sub normal temperature (the difference
between the desired and actual room temperature) in the
room is to affect the supply temperature to the climate
system. A higher value gives a greater and faster change of
the heating curve's set offset.
NOTE
Too high a set value for "factor system" can (de-
pending on your climate system) produce an un-
stable room temperature.
If several climate systems are installed the above settings
can be made for the relevant systems.
MENU 1.9.5 - COOLING SETTINGS
delta at +20 °C
Setting range: 3 – 10 °C
Factory setting: 3
delta at +40 °C
Setting range: 3 – 20 °C
Factory setting: 6
17Chapter 4 | SMO 20 – at your serviceNIBE SMO 20

cooling 1.9.5
set pt value cool/heat sensor
heat at room under temp.
cool at room over temp.
use room sensor
°C
°C
°C
cool/heat sensor
Setting range: BT74 (BT50)
Factory setting: BT74
set pt value cool/heat sensor
Setting range: 5 – 40 °C
Factory setting: 21
heat at room under temp.
Setting range: 0.5 – 10.0 °C
Default value: 1.0
cool at room over temp.
Setting range: 0.5 – 10.0 °C
Default value: 3.0
start active cooling
Setting range: 10 – 300 DM
Factory setting: 30 DM
time betw. switch heat/cool (Displayed if
cooling in 2-pipe system is activated.)
Setting range: 0 – 48 h
Factory setting: 2
You can use SMO 20 to control the cooling in your house
during hot periods of the year.
Caution
Certain setting options only appear if their function
is installed and activated in SMO 20.
delta at +20 °C
Set the desired temperature on the temperature difference
between supply and return lines to the climate system during
cooling operation when the outdoor temperature is +20 °C.
SMO 20 then attempts to get as close to the set temperature
as possible.
delta at +40 °C
Set the desired temperature on the temperature difference
between supply and return lines to the climate system during
cooling operation when the outdoor temperature is +40 °C.
SMO 20 then attempts to get as close to the set temperature
as possible.
cool/heat sensor
If a single room will determine how the whole installation
will work, a cooling/heating sensor (BT74) is connected to
SMO 20. This sensor determines when it is time to switch
between cooling and heating operation for the whole install-
ation.
Caution
When the heating/cooling sensors (BT74) have
been connected and activated in menu 5.4, no
other sensor can be selected in menu 1.9.5.
set pt value cool/heat sensor
Here you can set at which indoor temperature SMO 20 is to
shift between heating respectively cooling operation.
heat at room under temp.
Here you can set how far the room temperature can drop
below the desired temperature before SMO 20 switches to
heating operation.
cool at room over temp.
Here you can set how high the room temperature can in-
crease above the desired temperature before SMO 20
switches to cooling operation.
larm rumsgivare kyla
This is where you set whether SMO 20 is to initiate an alarm
if the room sensor is disconnected or breaks during cooling
operation.
start active cooling
Here you can set when active cooling is to start.
Degree minutes are a measurement of the current heating
demand in the house and determine when the compressor,
cooling operation respectively additional heat will start/stop.
time betw. switch heat/cool
This selection is only available when cooling in 2-pipe sys-
tems.
Here you can set how long SMO 20 is to wait before it returns
to heating mode when the cooling demand has ceased or
vice versa.
NIBE SMO 20Chapter 4 | SMO 20 – at your service18

MENU 1.9.7 - OWN CURVE
supply temperature
heating
Setting range: 5 – 80 °C
cooling (accessory required)
Depending on which accessory is used the setting range
can vary.
Setting range: 7 – 40 °C
own heating curve 1.9.7.1
flow line temp. at -20 °C
flow line temp. at -10 °C
flow line temp. at 0 °C
flow line temp. at 10 °C
flow line temp. at -30 °C
flow line temp. at 20 °C
°C
°C
°C
°C
°C
°C
When required, create your own heating or cooling curve
here, by setting the desired supply temperatures for differ-
ent outdoor temperatures.
Caution
Curve 0 in menu 1.9.1 must be selected for own
curve to apply.
MENU 1.9.8 - POINT OFFSET
outdoor temp. point
Setting range: -40 – 30 °C
Default value: 0 °C
change in curve
Setting range: -10 – 10 °C
Default value: 0 °C
point offset 1.9.8
change in curve
outdoor temp. point
°C
°C
outdoor temp. °C
flow temperature °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 heat 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 is cold in the house, at, for example -2 °C,
"outdoor temp. point" is set to "-2" and "change in
curve" is increased until the desired room temper-
ature is maintained.
Caution
Wait 24 hours before making a new setting, so that
the room temperature has time to stabilise.
19Chapter 4 | SMO 20 – at your serviceNIBE SMO 20

Set the hot water capacity
OVERVIEW
Sub-menus
temporary lux
HOT WATER 2
comfort mode
scheduling
advanced
active
economy
off
This menu only appears if a water heater is docked to the
heat pump.
For the menu HOT WATER there are several sub-menus.
Status information for the relevant menu can be found on
the display to the right of the menus.
temporary lux Activation of temporary increase in the hot
water temperature. Status information displays “off" or what
length of time of the temporary temperature increase re-
mains.
comfort mode Setting hot water comfort. The status inform-
ation displays what mode is selected, "economy", "normal"
or "luxury".
scheduling Scheduling hot water comfort. The status in-
formation "set" appears if you have set scheduling but it is
not currently active, "holiday setting" appears if holiday
setting is active at the same time as scheduling (when the
holiday function is prioritised), "active" appears if any part
of scheduling is active, otherwise "off" appears.
advanced Setting periodic increase in the hot water tem-
perature.
MENU 2.1 - TEMPORARY LUX
Setting range: 3, 6 and 12 hours and mode "off" and "one
time increase"
Default value: "off"
off
temporary lux 2.1
3 hrs
6 hrs
12 hrs
one time
increase
When hot water requirement has temporarily increased this
menu can be used to select an increase in the hot water
temperature to lux mode for a selectable time.
Caution
If comfort mode "luxury" is selected in menu 2.2
no further increase can be carried out.
The function is activated immediately when a time period
is selected and confirmed using the OK button. The remain-
ing time for the selected setting is shown to the right.
When the time has run out SMO 20 returns to the mode set
in menu 2.2.
Select “off" to switch off temporary lux .
MENU 2.2 - COMFORT MODE
Setting range: smart control, economy, normal, luxury
Default value: normal
economy
comfort mode 2.2
normal
luxury
smart control
The difference between the selectable modes is the temper-
ature of the hot tap water. Higher temperature means that
the hot water lasts longer.
smart control: In this menu, you activate the Smart Control
function. The function learns the previous week’s hot water
consumption and adapts the temperature in the water
heater for the coming week to ensure minimal energy con-
sumption.
If the hot water demand is greater, there is a certain addi-
tional amount of hot water available.
When the Smart Control function is activated, the water
heater delivers the reported performance according to the
energy decal.
economy: This mode produces less hot water than the oth-
ers, but is more economical. This mode can be used in
smaller households with a small hot water requirement.
normal: Normal mode gives a larger amount of hot water
and is suitable for most households.
luxury: Lux mode gives the greatest possible amount of hot
water. In this mode, the immersion heater is used to heat
hot water as well as the compressor, which increases oper-
ating costs.
NIBE SMO 20Chapter 4 | SMO 20 – at your service20