Nibe SMO 20 User manual

NIBE™ SMO 20
CONTROL MODULE
BE IN CONTROL.
NIBE SMO 20
SMO 20 is a modern, simple control module that, together
with a NIBE air/water heat pump, a water heater and an ex-
tra step-controlled addition, creates a complete installation.
Outdoor sensor, room sensor and three temperature sensors
are included. F2040/F2300 works with floating condensing
against the heating system and prioritises hot water charging
via the reversing valve.
• Simple installation.
• Enables optimised control of the climate unit.
• Control the climate unit using degree minute calculation.
• Clear display of the heat pump’s and heating system’s es-
sential temperatures.
• SMO 20 has automatic legionella control.
• With a height of only 1500 mm, VPB 200/70, together
with SMO 20 and any NIBE outdoor air heat pump F2030
or F2040, makes an excellent combination in the event of
low ceilings.
• NIBE UplinkTM in combination with the internet gives a
quick overview and the present status of the installation
and comfort in the home regardless of the location of the
user.

-FL2
-CM1
-EB101
-QM1
-BT3
-BT12 -QM31
-QM32 -QM43
-GP12
-EB101
-HQ1
-BT1
-AA25
-AA25
-BT63
-KA1
-EB1
-FL10
-RN10
-CP10
-AA25-QN10
-AA25-BT7
-AA25-BT6
-EB1
2 NIBE SMO 20
GOOD TO KNOW ABOUT NIBE™ SMO 20
System diagram for a compatible air/water heat pump
together with SMO 20 and electric heater before reversing
valve for hot water (floating condensing)
This installation alternative is suitable for simpler installations
with a focus on low installation costs. SMO 20 (AA25) starts
and stops the heat pump (EB101) to meet the heat and hot
water demand of the installation. At simultaneous heating and
hot water demand the reversing valve switches (AA25-QN10)
periodically between the climate system and the water heater/
accumulator tank (CP10).
When the water heater/accumulator tank (CP10) are fully
charged the reversing valve (AA25- QN10) switches to the
climate system. Additional heat (EB1) is connected automatically
when the energy demand for the installation exceeds the heat
pump capacity. This is used for both heating and charging hot
water. The additional heat can also be used if a higher tempera-
ture of hot water is required than the heat pump can produce.
Principle of operation
SMO 20 can be connected together with other products from
NIBE in several different ways, some of which are shown below
(accessories may be required). Further option information is
available at www.nibe.se/docking and in the respective assembly
instructions for the accessories used. See the last page of this
product sheet for the list of the accessories that can be used with
SMO 20.
Installations with SMO 20 can produce heating and hot water.
On cold days of the year when the access to energy from the
air is reduced the additional heating can compensate and help
to produce heat. The additional heating is also good to have as
assistance if the heat pump ends up outside its working range or
if it has been blocked for any reason.

-EB20
-KA1
-FL2
-CM1
-EB101
-QM1
-BT3
-BT12 -QM31
-QM32 -QM43
-GP12
-EB101
-HQ1
-BT1
-AA25
-AA25 -AA25
-FL10
-RN10
-CP10
-AA25-QN10
-AA25-BT7
-AA25-BT6
-BT25
-EB1
-CP5
-GP10
-KA1
-BT71
-EB1
-AA25
-BT50
NIBE SMO 20 3
GOOD TO KNOW ABOUT NIBE™ SMO 20
List of components,
system diagram
EB101 Heat pump system
BT3 Temperature sensor, return line
BT12 Temperature sensor, condenser supply line
EB101 Heat pump
FL10 Safety valve
GP12 Charge pump
HQ1 Particle filter
QM1 Drain valve, Heating medium
QM31 Shut-off valve, Heating medium, Supply
QM32 Shut off valve, Heating medium, Return
QM43 Shut-off valve
Other information
CM1 Expansion vessel closed, Hot water
CP5 Buffer vessel (UKV)
CP10 Accumulator tank with hot water heating
EB20 Immersion heater
FL2 Safety valve, Heating medium
KA1 Auxiliary relay/Contactor
RN10 Control valve
AA25 SMO 20
BT1 Outdoor sensor
BT6 Temperature sensor, hot water charging
BT7 Temperature sensor, hot water top
BT25 Temperature sensor, external supply
BT50 Room sensor
BT63 Temperature sensor, external supply line
after electric heater
BT71 Temperature sensor, external return line
GP10 Circulation pump, Heating medium
QN10 Reversing valve, Hot water/Heating me-
dium
EB1 Additional heat
EB1 Immersion heater
KA1 Auxiliary relay/Contactor
System diagram for a compatible air/water heat pump to-
gether with SMO 20 and electric heater after reversing valve
for hot water (floating condensing)
This installation alternative is suitable for more complex installa-
tions with a focus on comfort. SMO 20 (AA25) starts and stops the
heat pump (EB101) to meet the heat and hot water demand of
the installation. At simultaneous heat and hot water demand the
reversing valve switches (AA25-QN10) periodically between the
climate system and the water heater/accumulator tank (CP10).
When the water heater/accumulator tank (CP10) are fully charged
the reversing valve (AA25- QN10) switches to the climate system.
Additional heat (EB1) is connected automatically when the en-
ergy demand for the installation exceeds the heat pump capacity.
Immersion heater (EB20) in the water heater/accumulator tank
(CP10) is used during the time to produce hot water if the heat
pump (EB101) is used for heating the building at the same time.
The additional heat can also be used if a higher temperature of
hot water is required than the heat pump can produce.

4 NIBE SMO 20
GOOD TO KNOW ABOUT NIBE™ SMO 20
Equipment SMO 20
LEK
LN 110234PE
21 20 19 18 17 16 15 14 13 12 11 10 9876 54 321
LEK
LN 110234PE
PF3
AA4
X2
AA7
UB2
UB1
AA2
FA1
X1
AA2
AA7
X1
SF1

NIBE SMO 20 5
GOOD TO KNOW ABOUT NIBE™ SMO 20
List of components
Electrical components
AA 2 Base card
AA 4 Display unit
AA 7 Extra relay circuit board
FA 1 Miniature circuit-breaker
X 1 Terminal block, incoming electrical supply
X 2 Terminal block, control signal circulation pump,
sensors AUX inputs and heat pump
SF 1 Switch
PF 3 Serial number plate
UB 1 Cable grommet, incoming supply electricity,
power for accessories
UB 2 Cable gland, signal
Designations in component locations according to standard
IEC 81346-1 and 81346-2.

110
410
360
110
10
310
215
70
35
LEK
LEK
6 NIBE SMO 20
Dimensions SMO 20
GOOD TO KNOW ABOUT NIBE™ SMO 20
Supplied components
Heating pipe pasteOutdoor sensor
Aluminium tape
Cable tie Insulation tape
Temperature sensor

NIBE SMO 20 7
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
SYSTEM SOLUTIONS
The following combinations of products are recommended for control with SMO 20.
Control
module
Air/water heat
pump
Accumulator
with hot water
heater
Circ. pump Water heater HW Control Addi-
tion
Volume
vessel
SMO 20
F2030 – 7 kW
VPA 300/200
VPA 450/300
VPAS 300/450
CPD 10-25/55
CPD 10-25/60
VPB 200
VPB 300
VPBS 300
VPB 500
VPB 750-2
VPB 1000
VS T 11
ELK 15
ELK 26
UKV 100
UKV 200
UKV 300
UKV 500
F2030 – 9 kW
F2040 – 8 kW
F2040 – 12 kW
F2040 – 16 kW VPB 500
VPB 750-2
VPB 1000 VST 20
F2300 – 14 kW
F2300 – 20 kW VPA 450/300
VPAS 300/450
VPB 750-2
VPB 1000

8 NIBE SMO 20
Alarm indications
The status lamp lights red in the event of an alarm and the display
shows detailed information depending on the fault. An alarm log
is created with each alarm containing a number of temperatures,
times and the status of outputs.
Own curve
F1255 has pre-programmed non linear heating curves. It is also
possible to create an own defined curve. This is an individual
linear curve with one break point. You select a break point and
the associated temperatures.
INSTALLATION
Hot water production
when there is a demand for hot water, the heat pump gives this
priority and devotes its entire output to water heating. No room
heat is produced in this mode. Maximum time for hot water
charging can be adjusted in the menu system. After this, heating
is produced for the remaining period of time before further water
heating can take place.
Hot water charging starts when the hot water sensor has fallen
to the set start temperature. Hot water charging stops when
the hot water temperature on the hot water sensor (BT6) has
been reached. For occasional higher demand for hot water, the
“temporary lux” can be used to raise the temperature for 3 – 12
hours (selected in the menu system).
Control, general
The indoor temperature depends on several factors. Sunlight and
heat emissions from people and household machines are nor-
mally sufficient to keep the house warm during the warmer parts
of the year. When it gets colder outside, the climate system must
be started. The colder it is outside, the warmer radiators and floor
heating system must be.
Control of the heat production is performed based on the "float-
ing condensing"principle, i.e. the temperature level needed for
heating at a specific outdoor temperature is produced guided by
collected values from the outdoor and supply temperature sen-
sors. The room temperature sensor can also be used to compen-
sate the deviation in room temperature.
Control and scheduling heat production
The heat supply to the building is controlled in accordance with
the selected control curve (curve slope and offset) in menu 1.9.1.
After adjustment, the correct amount of heat for the current out-
door temperature is supplied. The supply temperature of the heat
pump will hunt around the theoretically required value. For sub-
normal temperatures the control system calculates a heating defi-
cit in the form of "degree-minutes", which means that heating
production is accelerated. The larger the subnormal temperature,
the greater the heat production.
Room sensor
A room temperature sensor can be connected to SMO 20. The
room temperature sensor has up to three functions:
1. Show current room temperature in the control module display.
2. Option of changing the room temperature in °C.
3. Makes it possible to change/stabilise the room temperature.
The control module operates without the sensor, but the sen-
sor must be installed if one wishes to readout the accommoda-
tion's indoor temperature in SMO 20's display. The sensor must
be activated in menu 1.9.4 if the sensor is to be used to change
the room temperature in °C and/or to change/stabilise the room
temperature.
Relay output for emergency mode
The emergency mode relay can be used to activate external ad-
ditional heat, an external thermostat must then be connected
to the control circuit to control the temperature. Ensure that the
heating medium circulates through the external additional heat-
ing. No hot water is produced when emergency mode is acti-
vated.
External circulation pump
Heat production is controlled by the outdoor temperature and a
theoretical desired value of the indoor temperature. This occurs
in accordance with a chosen setting of the regulating curve (curve
slope and offset) in menu 1.9.1.
To reach a high level of heating comfort during the heating phase,
the external circulation pump circulates the hot water in the heat-
ing system even when the domestic hot water output is high.

NIBE SMO 20 9
INSTALLATION
LEK
Compatible NIBE air/water heat pumps
Product Program version
F2025 55
F2026 55
F2030 All versions
F2040 All versions
F2300 55
Compatible NIBE air/water heat pumps must be equipped with
a control card that has at least the software version given in the
following list. The control card version is displayed in the heat
pump's display (if applicable) upon start-up.
USB service outlet
SMO 20 is equipped with a USB socket in the display unit. This
USB socket can be used to connect a USB memory to update
the software, save logged information and handle the settings
in SMO 20.
External connection options
SMO 20 has software controlled inputs and outputs for connec-
tion of sensors and external switch function. This means that a
sensor or an external switch function can be connected to one
of six special connections where the function for connection is
decided in the control module software.
If an external switch function is connected to SMO 20 the func-
tion for used input or output must be selected in menu 5.4.
Possible selection for AUX inputs
Following functions can be connected to the AUX inputs. Some
of the functions can also be activated and scheduled via menu
settings.
• Temperature sensor, external return line
• Switch for external blocking of addition
• Contact for external blocking of compressor in the heat
pump
• Contact for external tariff blocking
• Switch for external blocking of heating
• Contact for activation of “temporary lux"
• Contact for activation of “external adjustment”
Possible selection for AUX outputs
It is possible to have an external connection through the relay
function via a potential free variable relay (max 2 A) on the termi-
nal block X4 on the base card (AA2).
Optional functions for external connection:
- Indication of buzzer alarm.
- Control of circulation pump for hot water circulation.
If any of the above is installed to terminal block X4 on the base
card the function must be selected in menu 5.4. The common
alarm is preselected at the factory.

10 NIBE SMO 20
THE DISPLAY
Display unit
Display, A
Instructions, settings and operational information are shown on
the display. The easy-to-read display and menu system, facilitates
navigation between the different menus and options to set the
comfort or obtain the information you require.
Status lamp, B
The status lamp indicates the status of the heat pump. It:
• lights green during normal operation.
• lights yellow in emergency mode.
• lights red in the event of a deployed alarm.
OK button, C
The OK button is used to:
• confirm selections of sub menus/options/set values/page in
the start guide.
Back button, D
The back button is used to:
• go back to the previous menu.
• change a setting that has not been confirmed. BStatus lamp
ADisplay
COK button
DBack button
EControl knob
FSwitch
SMO 20
Control knob, E
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).
Switch, F
The switch assumes three positions:
• On ()
• Standby ( )
• Emergency mode ( )
A large, easy to rad multicoulour display gives everyone the chance to
maximize the energy saving potential of this exciting green technology!
INDOOR CLIMATE
HOT WATER
MY SYSTEM

Indoor temperature
–(if room sensors are
installed)
Outdoor
temperature
Hot water temp.
Estimated
amount of
hot water
NIBE SMO 20 11
THE DISPLAY
Menu system
When the door to the heat pump is opened, the menu system’s
four main menus are shown in the display as well as certain basic
information.
Menu 1 – Indoor climate
Setting and scheduling the indoor climate.
Menu 2 – Hot water
Setting and scheduling hot water production.
This menu only appears if a water heater is docked to the heat
pump.
Menu 3 - Info
Display of temperature and other operating information and
access to the alarm log.
Menu 4 – My system
Setting time, date, language, display, operating mode etc.
Menu 5 - Service
Advanced settings. These settings are not available to the user.
The menu is visible by pressing the Back button for 7 seconds.
Start guide
The first time the heat pump is started a start guide is started.
The start guide instructions state what needs to carried out at the
first start together with a run through of the heat pump’s basic
settings.
The start guide ensures that the start-up is carried out correctly
and cannot be bypassed. The start guide can be started later in
menu 5.7.
If the start guide is left on this page it closes
automatically in 58 min
INDOOR CLIMATE
HOT WATER
MY SYSTEM

TECHNICAL SPECIFICATIONS
IP 24
SMO 20
Width (mm) 360
Height (mm) 410
Depth (mm) 110
Weight, (without packaging and enclosed components) (kg) 4,3
Enclosure class IP21
Max number air/water heat pumps 1
Max number of sensors 7
Max number of charge pumps 1
Max number of circulation pumps/climate systems 1
Mains voltage 230 V 2~ 50 Hz
Max. current (A) 2
Max number of additional steps 3
Operation mode (EN60730) Type 1
Electrical contamination 2
Area of operation (°C) -25 – 70
Ambient temperature (°C) 5 – 35
Program cycles Hours: 1, 24
Days: 1, 2, 5, 7
Resolution, program (min) 1
Rated value for impulse voltage (kV) 4

LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
LEK
K13
K11
K10
LEK
Rumsgivare RTS 40
Room sensor used to obtain a
more even indoor temperature.
LEK
LEK
LEK
NIBE SMO 20 13
ACCESSORIES
VPA
Double-jacketed hot water cylinder
VPA 300/200
VPA 450/300
VPAS 300/450
VPB
Water heater with charge coil
VPB 500
VPB 750-2
VPB 1000
VPB 200
VPB 300
Water heater with charge coil
Hot water control
VST11
Reversing valve, Ø 28 mm, com-
pression ring
Max recommended charge
power, 17 kW
VST20
Reversing valve, Ø 35 mm, com-
pression ring
Max recommended charge
power, 40 kW
Charge pump CPD 10
Charge pump for heat pump
CPD 10-25/55
CPD 10-25/60
Immersion heater IU
3 kW
6 kW
9 kW
External electrical addition
ELK
ELK 15
Immersion heater
15 kW, 3 x 400 V
ELK 26
Immersion heater
26 kW, 3 x 400 V
Auxiliary relay HR 10
Auxiliary relay for control of
external 1 to 3 phase loads.
Junction box K11
Junction box with thermostat
and overheating protection.
Heat pump
F2030
7 kW / 9 kW
F2040
8 kW / 12 kW / 16 kW
F2300
14 kW / 20 kW

NIBE Energy Systems AB
Box 14
285 21 Markaryd
SWEDEN
Tel. +46 433 - 73 000
www.nibe.eu
639590 Technical PBD GB NIBE SMO 20 1433-1
M
I
L
J
Ö
M
Ä
R
K
T
3
0
7
–
0
0
5
This brochure is a publication from NIBE. All product illustrations, facts and specifications are
based on current information at the time of the publication’s approval. NIBE makes reservations
for any factual or printing errors in this brochure.
Photos: www.benfoto.se. ©NIBE 2013.
NIBE is ISO-certified:
SS-EN ISO 9001:2000
SS-EN ISO 14001:2004