Nibe ERS S40-350 User guide

IHB EN 2143-3
531854
INSTALLER MANUAL
HRV unit
NIBE ERS S40-350
UN

41 Important information
4Safety information
4Serial number
5Recovery
6Inspection of the installation
72 Delivery and handling
7Transport and storage
7Supplied components
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
15Dimensions and ventilation connections
165 Electrical connection
16Supply
16Connecting to main product
186 Commissioning and adjusting
18Preparations
18Start-up and inspection
197 Program settings
19Start guide
19Menu system
228 Disturbances in comfort
22Troubleshooting
239 Accessories
23Top cabinet TOC 30
2410 Technical data
24Dimensions
25Technical specifications
26Energy labelling
27Electrical circuit diagram
28Item register
31Contact information
3Table of ContentsNIBE ERS S40-350
Table of Contents

Safety information
This manual describes installation and service proced-
ures 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 persons
with reduced physical, sensory or mental
capabilities or lack of experience and
knowledge if they have been given super-
vision or instruction concerning use of the
appliance in a safe way and understand
the hazards involved. Children shall not
play with the appliance. Cleaning and user
maintenance shall not be made by children
without supervision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2020.
SYMBOLS
NOTE
This symbol indicates danger to person or ma-
chine .
Caution
This symbol indicates important information
about what you should consider when installing
or servicing the installation.
MARKING
The CE mark is obligatory for most products sold
in the EU, regardless of where they are made.
CE
Classification of enclosure of electro-technical
equipment.
IPX1B
Serial number
The serial number can be found at the bottom right, in-
side the front cover.
Caution
You need the product's serial number for servi-
cing and support.
NIBE ERS S40-350Chapter 1 | Important information4
1 Important information

Recovery
Leave the disposal of the packaging to the in-
staller who installed the product or to special
waste stations.
When disposing of the product, its constituent
materials and components, e.g. compressors,
fans, circulation pumps and circuit boards, must be dis-
posed 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
administrative penalties in accordance with current le-
gislation.
5Chapter 1 | Important informationNIBE ERS S40-350

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.
DateSigna-
ture
NotesDescription
✔
Electricity (page 16)
Connections
Main voltage
Fuses property
Earth circuit-breaker
NIBE ERS S40-350Chapter 1 | Important information6

Transport and storage
ERS S40 should be transported and stored in the dry.
Supplied components
4 x feetRail for wall mounting
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 S40-350
2 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.
Supply air
Exhaust air Extract air
Outdoor
air
ERS S40 can be converted to a right-handed version if
necessary, which means that exhaust air and supply air
are connected to the right.
Extract air
Outdoor air Supply 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
insulation plug. This is located furthest in the left-
hand space.
3. Remove the extract air sensor (BT21) including the
insulation plug. This is located furthest in the right-
hand space.
NIBE ERS S40-350Chapter 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 S40-350

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 connec-
tion 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 S40-350Chapter 2 | Delivery and handling10

Assembly
ERS S40 can be installed on a wall or placed on a hori-
zontal surface. For wall installation, place the enclosed
rail on a solid wall. Noise from the fans might be trans-
ferred 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 withstand 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)
above the HRV unit for installing ventilation
hoses.
Mounting
When hanging on a wooden wall, a vibration damper is
recommended 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.
11Chapter 2 | Delivery and handlingNIBE ERS S40-350

GQ3
XL33
XL31
XL32
XL34
AA33
GQ2
EP29
HQ10
HQ11
W500
W119
PZ1
BT21
BT23
BT22
BT20
EB18
MA3
BM20
X1
FQ10
PZ4
NIBE ERS S40-350Chapter 3 | Design of the HRV unit12
3 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
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 S40-350

General ventilation
connections
• Ventilation installation must be carried out in accord-
ance 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 tight-
ness class B.
• To prevent fan noise being transferred to the ventila-
tion devices, silencers should be installed in the duct
system. In the event of ventilation devices in noise-
sensitive rooms, silencers must be installed.
• The extract air and outdoor air ducts are insulated us-
ing diffusion-proof material (at least PE30 or equival-
ent) 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 connect-
ing the air ducts.
EXHAUST AIR DUCT /KITCHEN FAN
Exhaust air duct (kitchen fan) must not be connected to
ERS S40.
To prevent food vapour being transferred to ERS S40
the distance between the kitchen fan and the exhaust
air device must be considered. The distance should not
be less than 1.5 m, but this can vary between different
installations.
Always use a kitchen fan when cooking.
Ventilation flow
Connect ERS S40 so that all the exhaust air, except kit-
chen duct air (kitchen fan), passes through the heat ex-
changer (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).
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 re-
duced installation efficiency and thus poorer operating
economy, a poorer indoor climate and moisture damage
in the building.
NIBE ERS S40-350Chapter 4 | Ventilation connections14
4 Ventilation connections

Dimensions and
ventilation
connections
LEFT-HANDED VERSION
600 35
600
4 x Ø200
4 x Ø160
130 130
280200 145
625
340
Supply air
Exhaust air Extract air
Outdoor
air
RIGHT-HAND VERSION
600 35
600
4 x Ø200
4 x Ø160
130 130
280200 145
625
340
Extract air
Outdoor air Supply air
Exhaust
air
15Chapter 4 | Ventilation connectionsNIBE ERS S40-350

NOTE
All electrical connections must be carried out
by an authorised electrician.
Electrical installation and wiring must be carried
out in accordance with the stipulations in force.
ERS S40 must not be powered during installa-
tion.
NOTE
If the supply cable is damaged, only NIBE, its
service representative or similar authorised
person may replace it to prevent any danger
and damage.
• To prevent interference, sensor cables to external
connections 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.
AA33-S3 AA33-X24
Supply
ERS S40 is connected to a earthed single-phase wall
socket or a permanent installation. For permanent install-
ations, ERS S40 must be preceded by a circuit breaker
with at least a 3 mm breaking gap.
Connecting to main
product
COMPATIBLE PRODUCTS
• SMO S40• VVM S320
• VVM S325
• S1155
• S1255
CONNECTING COMMUNICATION
ERS S40 contains an accessory board (AA33) that con-
nects 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.
B A GND +12V
AA2-X30
1234
AA33-X24
1
2
3
4
5
6
7
8
ISO_12v
A
B
B
ISO_GND
ISO_GND
ISO_12V
A
Main product
ERSS40
NIBE ERS S40-350Chapter 5 | Electrical connection16
5 Electrical connection

If more accessories are to be connected, or are already
installed, the boards are connected in series.
Multiple ERS S40
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
ERS S40 and another accessory from NIBE
B A GND
+12V
AA2-X30
1234
AA33-X24
AA5-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
ERSS40
Main product
Other accessory from NIBE
Dip switch
The DIP switch (AA33-S3) has to be set as follows. You
can have up to 4 ERS S40 in the same installation, with
each ERS S40 having 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 S40-350

Preparations
• Check that the air filters are clean, they can become
dirty after installation.
Caution
ERS S40 must not be started if the temperat-
ure is below -25 °C in the installation area.
Start-up and
inspection
SETTING THE VENTILATION
The ventilation must be set according to applicable
standards. 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 im-
portant that a ventilation adjustment is ordered and
permitted.
Caution
An incorrectly set ventilation flow can damage
the house and may also increase energy con-
sumption.
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
Tillg ngligt 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
10
20
30
40
60
50
80
90
70
100
Driveffekt
(W)
Luftfl de
(l/s)
30%
100%
80%
60%
40%
50%
70%
90%
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 ex-
haust 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 S40-350Chapter 6 | Commissioning and adjusting18
6 Commissioning and adjusting

Program setting of ERS S40 can be performed via the
start guide or directly in the menu system in the main
product.
The main product’s software must be the latest version.
Caution
See the documentation 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 tem-
perature 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 de-
frosting.
Menu 1.2.7 - Ventilation recovery
Temp stop of heat recovery
Setting range: 5 – 30 °C
Min diff ind and outd air
Setting range: 2 – 10 °C
Recovery stop during heating
Setting range: on/off
19Chapter 7 | Program settingsNIBE ERS S40-350
7 Program settings

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 you do not have a heating demand and it is
warmer outside than inside, ventilation recovery is
stopped to prevent the building from being heated fur-
ther.
Caution
Only ventilation recovery is stopped, not the
ventilation.
Temp stop of heat recovery: Here, you set the outside
temperature at which ventilation recovery is to stop.
Min diff ind and outd air: Here, you set the temperature
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 re-
covery during the time heating is permitted is possible.
Cooling recovery: When you do not have a heating de-
mand, ventilation recovery is stopped to prevent the
building from being heated further. When it is warm in-
doors and even warmer outdoors, ERS S40 can be used
to prevent the building from being heated further with
the "Cooling recovery" function. "Cooling recovery"
means that the cool temperature in the building can also
be retained when ventilation recovery is running. When
"Cooling recovery" is activated, the exhaust air is used
to cool the supply air, which causes the temperature in
the building to drop slightly.
"Cooling recovery" is started when the exhaust air tem-
perature is a certain number of degrees below the out-
door 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 temper-
ature difference between outdoor air and exhaust air
that is required in order for cooling recovery to start.
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 and outd air
Setting range: 3 – 10 °C
Night cooling during heating
Setting range: on/off
Activate night cooling here. When the temperature in
the building is high and the outdoor temperature is low,
a cooling effect can be obtained by forcing the ventila-
tion. When night cooling is activated, the fan operates
at speed 4. In this mode, ventilation recovery is stopped.
Start temp exhaust air: Here, you set the exhaust air
temperature at which night cooling will start.
Min diff ind and outd air: If the temperature difference
is greater than the set value for "Min diff ind and outd
air", 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.
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 speed
change (speed 1 – speed 4) of the ventilation in menu
1.2.1.
Return time is the time taken before the ventilation
speed returns to normal speed.
Menu 1.2.6 - Filter cleaning interval
Months between filter cleaning
Setting range: 1 – 24 months
Clean the filter in ERS S40 regularly; how often depends
on the amount of dust in the ventilation air.
Set the interval for the reminder to clean the filter in this
menu.
NIBE ERS S40-350Chapter 7 | Program settings20