Nibe ERS S40-400 User manual

Installer manual
HRV unit
NIBE ERS S40-400
UN
IHB EN 2306-1
731447

41 Important information
4Safety information
4Symbols
4Serial number
5Recovery
6Inspection of the installation
72 Delivery and handling
7Transport and storage
7Supplied components
7Compatible products
7Removing the covers
8Physical configuration
11Assembly
11Mounting
123 Design of the HRV unit
13Pipe connections
13Sensors etc.
13Electrical components
13Ventilation
13Miscellaneous
144 Ventilation connections
14General ventilation connections
14Ventilation flow
14Adjusting ventilation
14Ventilation connections
155 Electrical connection
15Overview, AJB board (AA33)
15Supply
15Connecting to main product
186 Commissioning and adjusting
18Preparations
18Start-up and inspection
197 Activating ERS S40
19Start guide
19Menu system
228 Disturbances in comfort
22Troubleshooting
239 Accessories
2410 Technical data
24Dimensions
25Technical specifications
26Energy labelling
27Electrical circuit diagram
29Item register
31Contact information
3Table of ContentsNIBE ERS S40-400
Table of Contents

Safety information
This manual describes installation and service procedures
for implementation by specialists.
The manual must be left with the customer.
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.
If the supply cable is damaged, only NIBE,
its service representative or similar author-
ised person may replace it to prevent any
danger and damage.
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 consider when installing or servi-
cing the installation.
Serial number
The serial number can be found at the bottom right, inside
the front cover.
Caution
You need the product's serial number for servicing
and support.
NIBE ERS S40-400Chapter 1 | Important information4
Important information

Recovery
Leave the disposal of the packaging to the installer
who installed the product or to special waste sta-
tions.
When disposing of the product, its constituent ma-
terials and components, e.g. compressors, fans, circulation
pumps and circuit boards, must be disposed of at a special
waste station or dealer who provides this type of service.
To access the separate components, refer to the section
that shows the construction of the product. No special tools
are required for access.
Improper disposal of the product by the user results in ad-
ministrative penalties in accordance with current legislation.
5Chapter 1 | Important informationNIBE ERS S40-400

Inspection of the installation
Current regulations require the heating installation to be inspected before it is commissioned. The inspection must be
carried out by a suitably qualified person. In addition, fill in the page for the installation data in the User Manual.
DateSignatureNotesDescription
✔
Electricity (page 15)
Connections
Main voltage
Fuses property
Earth circuit-breaker
NIBE ERS S40-400Chapter 1 | Important information6

Transport and storage
ERS S40 should be transported and stored in the dry.
Supplied components
Rail for wall mounting 4 x feet
2 x screws
Compatible products
•SMO S40•VVM S320
•VVM S325
•S1155
•S1255
Removing the covers
FRONT COVER
1. Pull the hatch towards yourself.
INNER FRONT COVER
The inner front cover must be removed to access the internal
parts.
1. Remove the air filters.
2. Loosen the screws that hold the inner front cover in
place.
3. Pull the front cover straight out.
7Chapter 2 | Delivery and handlingNIBE ERS S40-400
Delivery and handling

Physical configuration
ERS S40 is supplied with exhaust air and supply air to the
left, known as the left-handed version. The images in this
manual show ERS S40 in the left-handed version, unless
otherwise specified.
Exhaust air Extract air
Supply air Outdoor air
ERS S40 can be converted to a right-handed version if ne-
cessary, which means that exhaust air and supply air are
connected to the right.
Outdoor air Supply air
Extract air Exhaust air
CONVERSION TO RIGHT-HANDED VERSION
1. Remove the insulation located in the right-hand space.
2. Remove the humidity sensor (BM20) including the insu-
lation plug. This is located furthest in the left-hand
space.
3. Remove the extract air sensor (BT21) including the insu-
lation plug. This is located furthest in the right-hand
space.
NIBE ERS S40-400Chapter 2 | Delivery and handling8

4. Disconnect the two cables located in the re-heater.
5. Remove the re-heater (EB18).
6. Install the re-heater (EB18) furthest in the right-hand
space.
7. Refit the insulation.
8. Connect the two cables to the re-heater.
9Chapter 2 | Delivery and handlingNIBE ERS S40-400

9. Install the humidity sensor (BM20) and the insulation
plug in the right-hand space.
There is a cable tie on the sensor, indicating how far in
the sensor has to be positioned.
10. Dismantle the grating.
11. Install the insulation plug and sensor (BT21) furthest in
the left-hand section.
12. Refit the grating.
13. Switch the filters around. Filter ePM1 55% must be
placed on the supply air side.
14. Fit the filter cassettes.
15. Mark the change to the air flows on the duct connection
plate (PZ4) on the upper side of the product.
Caution
In order to complete the conversion, changes are
required in menu 7.2.11.
NIBE ERS S40-400Chapter 2 | Delivery and handling10

Assembly
ERS S40 can be installed on a wall or placed on a horizontal
surface. For wall installation, place the enclosed rail on a
solid wall. Noise from the fans might be transferred to the
rail. When placing on a horizontal surface, fit the enclosed
feet on the underside of ERS S40. It is important for the
surface where ERS S40 is placed to be stable and to with-
stand the weight of the unit.
•Install with its back to an outside wall, ideally in a room
where noise does not matter, in order to eliminate noise
problems. If this is not possible, avoid placing it against a
wall behind a bedroom or other room where noise may be
a problem.
•Wherever the unit is located, walls to sound sensitive
rooms should be fitted with sound insulation.
•The HRV unit’s installation area always has to have a
temperature of at least -38 °C and max. 50 °C.
INSTALLATION AREA
Leave a free space of 800 mm in front of the product.
800
NOTE
Ensure that there is sufficient space (300 mm) for
connecting ventilation ducts.
Mounting
When hanging on a wooden wall, a vibration damper is re-
commended to prevent vibration being transferred.
1. Install the enclosed bracket to the wall.
2. Install ERS S40 on the brackets.
3. Screw ERS S40 firmly into place on the bracket, using
the enclosed screws.
11Chapter 2 | Delivery and handlingNIBE ERS S40-400

GQ3
XL33
XL31
XL32
XL34
AA33
GQ2
EP29
HQ10
HQ11
W500
W119
PZ1
BT21
BT23
BT22
BT20
EB18
MA3
BM20
X1
FQ10
PZ4
RF3
NIBE ERS S40-400Chapter 3 | Design of the HRV unit12
Design of the HRV unit

Pipe connections
Ventilation connection, exhaust airXL31
Ventilation connection, extract airXL32
Ventilation connection, supply airXL33
Ventilation connection, outdoor airXL34
Sensors etc.
Humidity sensor, exhaust airBM20
Temperature sensor, exhaust airBT20
Temperature sensor, extract airBT21
Temperature sensor, supply airBT22
Temperature sensor, outdoor airBT23
Electrical components
AJBboardAA33
Re-heaterEB18
Temperature limiterFQ10
Motor for the heat exchangerMA3
EMC cardRF3
Communication cableW119
Cord with connection plugW500
Terminal block, power supplyX1
Ventilation
Rotary heat exchangerEP29
Exhaust air fanGQ2
Supply air fanGQ3
Exhaust air filterHQ10
Supply air filterHQ11
Miscellaneous
Type platePZ1
Duct connection rating platePZ4
Designations according to standard EN 81346-2.
13Chapter 3 | Design of the HRV unitNIBE ERS S40-400

General ventilation connections
•Ventilation installation must be carried out in accordance
with current norms and directives.
•Provision must be made for inspection and cleaning of
the duct.
•The air duct system must be a minimum of air tightness
class B.
•To prevent fan noise being transferred to the ventilation
devices, install silencers in suitable locations in the duct
system.
•The extract air and outdoor air ducts are insulated using
diffusion-proof material along their entire lengths.
•Ensure that the condensation insulation is fully sealed at
any joints and/or at lead-in nipples, silencers, roof cowls
or similar.
•The air must be routed to the outdoor air duct through an
outer wall grille in the facade. The outer wall grille must
be installed so that it is protected from the weather and
must be designed so that no rainwater and/or snow can
penetrate the facade or follow the air into the duct.
•When positioning the outdoor air and extract air
hood/grille, bear in mind that the two air flows must not
short circuit to prevent the extract air from being drawn
into ERS S40 again.
•A duct in a masonry chimney stack must not be used for
extract air or outdoor air.
NOTE
To ensure a sealed connection to ERS S40, the
supplied hose clips must be used for connecting
the air ducts.
EXHAUST AIR DUCT /KITCHEN FAN
Exhaust air duct (kitchen fan) must not be connected to
ERS S40.
To prevent cooking odours from being led to the ERS S40,
the distance between the kitchen fan and the exhaust air
valve must be taken into consideration. The distance must
not be less than 1.5 m, but may vary between different in-
stallations.
Always use a kitchen fan when cooking.
Ventilation flow
Connect ERS S40 so that all the exhaust air, except kitchen
duct air (kitchen fan), passes through the heat exchanger
(EP29) in the product.
The ventilation flow must comply with the applicable national
standards.
The supply air flow must be lower than the exhaust air flow
to prevent over pressure in the house.
Set the ventilation capacity in the main product’s menu
system (menu 7.1.4 - "Ventilation").
Adjusting ventilation
To obtain the necessary air exchange in every room of the
building, the exhaust air valve and the supply air inlet as well
as the fans in the HRV unit must be correctly positioned and
adjusted.
Immediately after installation adjust the ventilation so that
it is set according to the projected value of the house.
Incorrect adjustment of the ventilation may lead to reduced
installation efficiency and thus poorer operating economy,
a poorer indoor climate and moisture damage in the building.
Ventilation connections
LEFT-HANDED VERSION
Exhaust air Extract air
Supply air Outdoor air
RIGHT-HAND VERSION
Outdoor air Supply air
Extract air Exhaust air
NIBE ERS S40-400Chapter 4 | Ventilation connections14
Ventilation connections

NOTE
All electrical connections must be carried out by
an authorised electrician.
Electrical installation and wiring must be carried
out in accordance with national provisions.
ERS S40 must not be powered during installation.
NOTE
If the supply cable is damaged, only NIBE, its ser-
vice representative or similar authorised person
may replace it to prevent any danger and damage.
•To prevent interference, sensor cables to external connec-
tions must not be laid close to high voltage cables.
•The minimum area of communication and sensor cables
to external connections must be 0.5 mm² up to 50 m, for
example EKKX, LiYY or equivalent.
For electrical wiring diagram, see page 27.
Overview, AJB board (AA33)
AA33-S3 AA33-X24
Supply
ERS S40 is connected to a earthed single-phase wall socket
or a permanent installation. For permanent installations,
ERS S40 must be preceded by a circuit breaker with at least
a 3 mm breaking gap.
Connecting to main product
CONNECTING TO THE HEAT PUMP
ERS S40 contains an accessory board (AA33) that connects
directly to the main product’s input board (terminal block
AA2-X30).
The communication cable (W119) is connected to the AJB
board (AA33) from the factory.
If several accessories are to be connected, or are already
installed, the boards are connected in series.
B A GND
+12V
AA2-X30
1234
AA33-X24
AA33-X24
1
2
3
4
5
6
7
8
ISO_12v
A
B
B
ISO_GND
ISO_GND
ISO_12V
A
ISO_12v
A
B
B
ISO_GND
ISO_GND
ISO_12V
A
1
2
3
4
5
6
7
8
ERSS40 1
Main product
ERSS40 2
15Chapter 5 | Electrical connectionNIBE ERS S40-400
Electrical connection

ERS S40 and another accessory from NIBE
Because there can be different connections for accessories
with accessory board (AA5), you should always read the in-
structions in the manual for the accessory that is to be in-
stalled.
B A GND
+12V
AA2-X30
1 2 3 4
AA33-X24
1
2
3
4
5
6
7
8
ISO_12v
A
B
B
ISO_GND
ISO_GND
ISO_12V
A
A
B
GND
A
B
GND
1
2
3
4
5
6
7
8
AA5-X4
ERSS40
Main product
Other accessory from NIBE
CONNECTING TO CONTROL MODULE
ERS S40 contains an accessory board (AA33) that connects
directly to the main product’s input board (terminal block
AA100-X9).
The communication cable (W119) is connected to the AJB
board (AA33) from the factory.
If several accessories are to be connected, or are already
installed, the boards are connected in series.
AA33-X24
AA33-X24
+12V
GND
B
A
AA100-X9
7
8
9
10
11
12
1
2
3
4
5
6
7
8
ISO_12v
A
B
B
ISO_GND
ISO_GND
ISO_12V
A
ISO_12v
A
B
B
ISO_GND
ISO_GND
ISO_12V
A
1
2
3
4
5
6
7
8
ERSS40 1
Control module
ERSS40 2
NIBE ERS S40-400Chapter 5 | Electrical connection16

ERS S40 and another accessory from NIBE
Because there can be different connections for accessories
with accessory board (AA5), you should always read the in-
structions in the manual for the accessory that is to be in-
stalled.
AA33-X24
+12V
GND
B
A
AA100-X9
7
8
9
10
11
12
1
2
3
4
5
6
7
8
ISO_12v
A
B
B
ISO_GND
ISO_GND
ISO_12V
A
A
B
GND
A
B
GND
1
2
3
4
5
6
7
8
AA5-X4
ERSS40
Control module
Other accessory from NIBE
DIP SWITCH
The DIP switch (S3) on the AJB board (AA33) must be set
as follows.
You can have up to 4 ERS S40 in the same installation, each
ERS S40 is given a unique setting.
NO
1 2 3 4
ERS S40 no. 2
NO
1 2 3 4
ERS S40 no. 1
NO
1 2 3 4
ERS S40 no. 4
NO
1 2 3 4
ERS S40 no. 3
17Chapter 5 | Electrical connectionNIBE ERS S40-400

Preparations
•Check that the air filters are clean, they can become dirty
after installation.
Caution
ERS S40 must not be started if the temperature
is below -25 °C in the installation area.
Start-up and inspection
SETTING THE VENTILATION
The ventilation must be set according to applicable stand-
ards. Adjust the supply air flow to guarantee a negative
pressure.
The settings are made in menu 7.1.4.
Even if ventilation is roughly set at installation it is important
that a ventilation adjustment is ordered and permitted.
Caution
An incorrectly set ventilation flow can damage the
house and may also increase energy consumption.
NOTE
Order a ventilation adjustment to complete the
setting.
Ventilation capacity
00 10 20 30 40 50 60 80 10070 90 110 120 130 140
100
200
300
400
500
600
700
800
Tillgängligt tryck
(Pa)
Luftflöde
(l/s)
30%
100%
80%
60%
40%
50%
70%
90%
Available pressure
Airflow
Fan rating1
00 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
10
20
30
40
60
50
80
90
70
100
Effekt
(W)
Luftflöde
(l/s)
20%
90%
70%
50%
30%
40%
60%
80%
100%
Output
Airflow
1The diagram shows the power consumption per fan.
HUMIDITY
ERS S40 has a built-in humidity sensor (BM20) that is used
when demand-controlled ventilation is required.
The speed of the rotor is regulated with respect to a set
value depending on the humidity measured in the exhaust
air, as well as the calculated humidity outdoors, to achieve
the desired relative humidity in the home. The speed of the
fans is also regulated, if necessary.
The settings for demand-controlled ventilation are made in
menu 7.1.4.4.
NIBE ERS S40-400Chapter 6 | Commissioning and adjusting18
Commissioning and adjusting

Activating ERS S40 can be performed via the start guide or
directly in the menu system.
The main product’s software must be the latest version.
Caution
Also see the Installer Manual for the main product.
Start guide
The start guide appears upon first start-up after heat pump
installation, but is also found in menu 7.7.
Menu system
If you do not make all settings via the start guide or need to
change any of the settings, this can be done in the menu
system.
MENU 7.2.1 -ADD/REMOVE ACCESSORIES
Activating/deactivating of accessories.
Select "ERS S40".
MENU 7.2.11 - VENT. HEAT EXCHANGER (ERS)
Physical configuration
Setting range: Left, Right
Allow re-heater
Setting range: on/off
Offset re-heater
Setting range: 0.0 – 5.0 °C
Desired supply air temp.
Setting range: 16.5 – 25 °C
Time between defrosts
Setting range: 1 – 8 h
Max. defrosting time
Setting range: 5 – 120 min
Temp. for end of defrosting
Setting range: -10.0 – 10.0 °C
Physical configuration: "Left" means that exhaust air and
supply air are connected to the left in the product. Changing
the configuration requires the conversion of ERS S40.
Allow re-heater: Here, you activate the inbuilt re-heater
(EB18).
Offset re-heater: Here, you set the number of degrees the
supply temperature must drop below "Desired supply air
temp." before the re-heater is permitted to start.
Desired supply air temp.: Here, you set the temperature you
want for the supply air when the re-heater is running When
the re-heater is not running, the supply air temperature and
the exhaust air temperature will be close to each other.
Time between defrosts, Max. defrosting time, Temp. for end
of defrosting: Here, you make settings for defrosting.
MENU 1.2.1 - FAN SPEED
Alternatives: normal and speed 1 – speed 4
The ventilation in the accommodation can be temporarily
increased or reduced here.
When you have selected a new speed a clock starts a count
down. When the time has counted down the ventilation
speed returns to the normal setting.
If necessary, the different return times can be changed in
menu 1.2.5.
The fan speed is shown in brackets (in percent) after each
speed alternative.
MENU 1.2.2 - NIGHT COOLING
Night cooling
Setting range: on/off
Start temp exhaust air
Setting range: 20 – 30 °C
Min. diff. ind. temp. - outd. temp.
Setting range: 3 – 10 °C
Night cooling during heating
Setting range: on/off
Here, you can activate night cooling. When the temperature
in the house is high, and the outdoor temperature is lower,
a cooling effect can be obtained by forcing the ventilation.
When night cooling is activated, the fans run at the speed
4. In this mode, ventilation recovery is stopped.
Start temp exhaust air: Here, you set the exhaust air tem-
perature at which night cooling will start.
Min. diff. ind. temp. - outd. temp.: If the temperature differ-
ence is greater than the set value for "Min. diff. ind. temp. -
outd. temp.", and the exhaust air temperature is higher than
the set value for "Start temp exhaust air", the ventilation
operates at speed 4 until one of these conditions is no longer
valid.
Night cooling during heating: It is possible to have night
cooling during the time heating is permitted.
19Chapter 7 | Activating ERS S40NIBE ERS S40-400
Activating ERS S40

MENU 1.2.5 - FAN RETURN TIME
speed 1 – speed 4
Setting range: 1 – 24 h
Here, you select the return time for the temporary change
of ventilation speed (speed 1 – speed 4), regardless of
whether the speed has been changed in menu 1.2.1 - "Fan
speed", via the home screen or via myUplink.
Return time is the time it takes before the temporary ventil-
ation speed returns to normal speed.
MENU 1.2.6 - FILTER CLEANING INTERVAL
Months between filter cleaning
Setting range: 1 – 24 months
The filters in ERS S40 are of a type that should not be
cleaned; they have to be replaced instead. These must be
replaced regularly, although how often depends of factors
such as the amount of particles in the ventilation air. Test
to find out what is most appropriate for your installation.
Set the interval for the reminder in this menu.
The menu shows the time remaining until the next reminder,
and you can also reset active reminders.
MENU 1.2.7 - VENTILATION RECOVERY
Temp stop of heat recovery
Setting range: 5 – 30 °C
Min. diff. ind. temp. - outd. temp.
Setting range: 2 – 10 °C
Recovery stop during heating
Setting range: on/off
Cooling recovery
Setting range: on/off
St temp sup air cooled by exh air
Setting range: -20.0 – 41.0 °C
Min diff outd and exhaust air
Setting range: 3.0 – 10.0 °C
When there is no heating demand, and the outdoor temper-
ature is approaching the indoor temperature, heat recovery
is stopped to prevent the house from being heated further.
Caution
Only the heat recovery is stopped, not the ventila-
tion.
Temp stop of heat recovery: Here, you set the outside tem-
perature at which ventilation recovery is to stop.
Min. diff. ind. temp. - outd. temp.: Here, you set the temper-
ature difference between the indoor air and the outdoor air
that is required in order for ventilation recovery to start.
Recovery stop during heating: Stopping ventilation recovery
during the time heating is permitted is possible.
Cooling recovery: When there is no heating demand, ventil-
ation recovery is stopped to prevent the house from being
heated further. When it is warm indoors and even warmer
outdoors, ERS S40 can be used to prevent the house from
heating up more than necessary. During cooling recovery,
the cooler air from the house is used to cool the incoming
air.
"Cooling recovery" is started when the exhaust air temper-
ature is a certain number of degrees below the outdoor
temperature and it is warm outside.
St temp sup air cooled by exh air: Here, you set the outdoor
temperature at which cooling recovery will start.
Caution
"St temp sup air cooled by exh air" cannot be lower
than "Stop heating" in menu 7.1.10.2 – "Auto mode
setting".
Min diff outd and exhaust air: Here, you set the temperature
difference between outdoor air and exhaust air that is re-
quired in order for cooling recovery to start.
MENU 7.1.4.1 - FAN SPEED, EXHAUST AIR
Fan speed
"Normal" and "Fan speed 1" – "Fan speed 4"
Setting range: 0 – 100%
Set the speed for the five different selectable speeds for
the fan here.
MENU 7.1.4.2 - FAN SPEED, SUPPLY AIR
Fan speed
"Normal" and "Fan speed 1" – "Fan speed 4"
Setting range: 0 – 100%
Set the speed for the five different selectable speeds for
the fan here.
MENU 7.1.4.4 - DEMAND CONTR. VENTILATION
Humidity controlled ventilation
Alternative: on/off
Highest fan speed
Setting range: 1 – 100%
Lowest fan speed
Setting range: 1 – 100%
Time interv. change of fan speed
Setting range: 1 – 60 minutes
Controlling zones
Activate zones for demand-controlled ventilation.
NIBE ERS S40-400Chapter 7 | Activating ERS S4020