Swegon CASA W3 XS Smart Guide

W3W4_XS_c_EN-t
Installation, commissioning and maintenance instructions
CASA®W3 | W4 xs Smart

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W3/W4.170420
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NOTE! The manual’s original language is
English.
Contents
Technical Guide
for design engineers, installation engineers and service personnel
The section 1 describes the high lights of the unit.
All information for mechanical installation is found from section 2.
Instructions for basic commissioning is found from section 3.
Units external connections to the systems or devices like Modbus, DI, DO, AI, etc. is found from section 4.
Units functions description and usage is found from section 5.
Units periodically maintenance and service is described in section 6.
If a malfunction or alarm occurs the instructions are found from section 7.
All technical data is found from section 8.
Important information ............................................. 3
1. General Description .............................................. 4
1.1 Enclosure .........................................................................4
1.2 Fans.................................................................................4
1.3 Demand ventilation control..............................................5
1.4 Filter ................................................................................5
1.5 Heat exchanger................................................................5
1.6 Temperature ....................................................................5
1.7 External connections........................................................5
1.8 Protective functions .........................................................5
2. Installation............................................................. 6
2.1 Unboxing ........................................................................6
2.2 Lifting the ventilation unit ...............................................6
2.3 Ventilation unit’s installation site ......................................6
2.3.1 Wall mounting..............................................................6
2.3.2 Ceiling mounting..........................................................7
2.4 Condensate discharge......................................................7
2.5 Ducts...............................................................................8
2.5.1 Enabling kitchen bypass................................................8
2.6 Electric and control cables................................................9
2.7 Installation of the Smart control panel..............................9
2.8 Smart automation packages...........................................10
2.9 Accessories ....................................................................10
3. Commissioning.................................................... 12
3.1 Air flows........................................................................12
3.1.1 Setting the basic airflows ............................................12
3.1.2 Travelling ....................................................................12
3.1.3 Maximum automatic boost .........................................12
3.1.4 General notifications...................................................12
3.2 Cooker hood function....................................................13
4. Units external connections................................. 14
4.1 Modbus.........................................................................14
4.2 Switch inputs (DI)...........................................................15
4.3 Voltage inputs (AI) .........................................................15
4.4 Relay outputs.................................................................16
4.5 Voltage outputs (AO) .....................................................16
4.6 Smart Access .................................................................16
5. Functions and use ............................................... 18
5.1 Functions.......................................................................18
5.1.1 Shortcuts ....................................................................18
5.1.2 Summer night cooling.................................................18
5.1.3 Cooker hood function.................................................19
5.1.4 Central vacuum function.............................................19
5.1.5 Fireplace function .......................................................19
5.1.6 Automatic Home/Away/Boost function .......................19
5.1.7 Automatic humidity control ........................................20
5.1.8 Automatic air quality control.......................................20
5.1.9 Weekly program .........................................................20
5.2 Supply air temperature control.......................................21
5.2.1 Temperature control settings ......................................21
5.2.2 Temperature measurement..........................................21
5.2.3 External heating and cooling units ..............................22
5.3 Defrosting......................................................................22
5.4 Restoring factory settings...............................................22
5.6 Changing settings password ..........................................22
5.7 Use................................................................................22
6. Service.................................................................. 23
6.1 Service reminder ............................................................23
6.2 Opening the ventilation unit ..........................................23
6.3 Filters.............................................................................23
6.4 Heat exchanger..............................................................23
6.5 Fans...............................................................................23
6.6 Other servicing...............................................................23
6.7 Diagnostics ....................................................................25
7. Alarms and Troubleshooting.............................. 26
7.1 Alarm indication, cooker hood.......................................26
7.2 Alarm indication, control panel ......................................26
7.3 Troubleshooting.............................................................26
7.4 Alarm descriptions .........................................................27
8. Technical data...................................................... 28
8.1 List of components ........................................................28
8.2 Air flows (EN 13141-4)...................................................29
8.2.1 W3 .............................................................................29
8.2.2 W4 .............................................................................29
8.3 Connection outputs.......................................................30
8.4 Acoustic data.................................................................30
8.5 Electrical wiring diagram................................................30
8.6 Control diagram and description of functions ................31
8.7 Measurements ...............................................................32
8.8 Ventilation unit codes ....................................................33
8.9 Accessories for controlling .............................................33
Commissioning form............................................... 34

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Important information
Installation and commissioning
Only qualified personnel should carry out installation,
configuration and commissioning. Only a qualified
electrician is allowed to make electrical installations
in accordance with national regulations.
The national standards and regulations dealing with
unit installation, configuration and commissioning
must be followed.
Do not use the ventilation unit until all work that
produces large quantities of dust or other impurities
has been completed.
The duct connections of the ventilation unit must be
covered by lids until it is mounted at its final location.
Make sure that the ventilation unit, filters and ducts
are clean and that there are no loose objects in them
before you commission the ventilation system.
Electrical work and connections
If you carry out voltage tests, measure the electrical
insulation resistance at various points or perform
other remedial measures that could damage sensitive
electronic equipment, you must first isolate the venti-
lation unit from the electrical supply grid.
It is recommended that all Smart ventilation units
should be equipped with a surge protection device
and a residual current circuit breaker. Comply with
local electrical safety regulations.
If the supply cord is damaged, it must be replaced by
the manufacturer or its service agent or a similarly
qualified person in order to avoid a hazard.
Drying laundry
A tumbler dryer of extract air type or a drying cabinet
must not be connected to the system due to the high
moisture content in the air it discharges.
Models with water-based air heater
When there is a water-based heater in the ventilation
system the system should be equipped with damper
in outdoor air duct so that the air heater cannot
freeze during a power failure and unit freezing pro-
tection works correctly.
Separate extract air
(bypass for cooker hood)
The separate extract air duct runs past the heat
exchanger. The extract air from the kitchen should be
conducted to the ventilation unit’s extract air duct.
Note that separate extract air flow affects the ventila-
tion unit’s annual efficiency.
Condensation
The surface temperature of the ventilation unit can
drop down to low during periods of extremely low
outdoor temperature and depending on the moisture
content of the air surrounding the unit, moisture may
condense on the surface. Condensation should be
taken into account when choosing furnishings that
are to be installed in the vicinity of the ventilation
unit.
To open the ventilation unit for service
Always isolate the ventilation unit’s power supply cable
before you open the inspection door! Wait a few min-
utes before you open the inspection door so that the
fans are stopped and electrical heaters are cooled.
There are no components inside the electrical box
that can be serviced by the user. In case of malfunc-
tion, do not restart the ventilation unit before the
cause of the fault is identified and fixed.
Filters
The ventilation unit must not be operated without
filters! Use only original Swegon filters. Find the cor-
rect filter in the section ”Technical data”.
Warranty conditions
Warranty conditions are included in delivery of the
unit as a separate document.
Declaration of conformity
Link to the declaration of conformity:
casahelp.fi
!
This document is intended for everyone involved in the installation work for or the use of a Swegon CASA venti-
lation unit. Read Instructions for Use before you use the ventilation unit. Save the Instructions for Use for future
use. This document is available in our website.
This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory
or mental capabilities ar lack of experience and knowledge if they have been given supervision or instruction con-
cerning 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.

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The document is valid for following
ventilation units:
• Swegon CASA W3 XS Smart (C, SW ver. 3.3)
• Swegon CASA W4 XS Smart (C, SW ver. 3.3)
Check the SW version from the type plate inside the unit.
The delivery includes:
• Ventilation unit
• Anti-vibration mountings (2 pcs.)
• Instructions for Use (FI, SE, EN + NO, DE)
• Installation, commissioning and maintenance
instructions (FI+SE)
• Warranty Conditions
• “Remember to change the filter” decal
• Product fiche
Standard connections:
• Power cord with earthed plug (2 m)
• Modular cable with RJ9 connector (1.5 m)
• Freely configurable I/O contacts for connection of
accessories (2 pcs.)
Accessories:
• Modular cable, 20 m, adapter
• Smart control panel
• Ceiling mounting frame
• Mounting frame with vapour barrier
• Water trap
• Condensate discharge hose
• SEC: IO extension cable with Modbus RTU
• SEM: IO extension module with relay and Modbus
RTU (input and output connections)
• Waterborne air heater/air cooler for installation in ducts
• Electric air heater for installation in ducts
• Smart automation packages:
- Auto Home/Away/Boost function +
Auto humidity control (CO2+ RH)
- Auto Air Quality control + Auto humidity
control (VOC + RH)
• Room temperature sensor
• Set for constant duct pressure
• Smart Access mobile user interface
1. General Description
The most important function of the ventilation system
is to ensure clean and fresh indoor air and to remove
moisture. The air in the home should be changed at
a continuous and sufficient rate to ensure a pleasant
indoor climate and avoid damage to building elements
caused by dampness.
Swegon CASA W3 is designed for detached houses,
multi-dwelling houses and holiday cottages less than
150 m2and W4 for less than 200 m2detached houses,
multi-dwelling houses and holiday cottages. The venti-
lation unit can be used both for new construction and
renovation projects.
• Air flow interval: W3 10 - 80 l/s | W4 10 - 97 l/s
• Heat exchanger temperature efficiency up to 82 %
(EN 308)
• Very low structure
• Built-in humidity sensor as standard.
• Learning and demand defrosting
• Continuous control of the supply air temperature
(Comfort)
• Energy-efficient and quiet EC fans
• CASA Smart control system
• The ventilation unit can be controlled from a control
panel, from the cooker hood, via external switch-
es, vai Modbus or with Smart Access mobile user
interface.
• Energy class A according to the Ecodesign directive
1.1 Enclosure
The ventilation unit conforms to enclosure class IP34
when the cover is closed.
1.2 Fans
The Swegon CASA ventilation units are equipped with
energy efficient EC fans.
The fans can be controlled in four operating modes and
steplessly with Smart functions:
• Boost = maximum commissioned air flow is used
when the ventilation requirement increases, e.g. for
cooking, showering or drying laundry.
• Home = normal air flow. In normal cases guarantees
healthy indoor air quality.
• Away = low air flow. Reduces power consumption
when no one is in the house.
• Travelling = very low air flow and lower supply air tem-
perature. Used when house is empty long period. (Can
only be selected from a Smart control panel.)
The unit’s weekly timer can change operation modes and
temperature setpoint at the preset times. It is always possi-
ble to override the weekly timer and change the operation
mode from a control panel or a Smart cooker hood.
You can select an air flow boost time of 30, 60 or
120 minutes or continuous boost from a Smart control

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panel. When the unit is controlled from a cooker hood,
the fan’s air flow boost time is 60 minutes.
1.3 Demand ventilation control
Ventilation can be controlled by demand with following
Smart functions:
• Stepless Home/Away/Boost Control = ventilation
level is controlled according to the CO2level.
• Humidity Control = ventilation is boosted steplessly
according to the moisture load caused by people.
• Air Quality Control = ventilation is boosted steplessly
according to VOC level.
• Smart Balancing Functions = supply and extract air
flow balance is controlled to maintain room pressure
level constant. i.e. cooker hood, fireplace or central
vacuum cleaner functions.
• Smart Cooling Boost = ventilation is boosted
according to cooling need.
1.4 Filter
The ventilation unit is equipped with supply air filter
according to filter class ISO ePM1 50% (F7) and with
extract air filter according to filter class ISO coarse (G3).
The need of filter replacement is indicated on the con-
trol panel and on a CASA Smart cooker hood.
1.5 Heat exchanger
The ventilation unit is equipped with a plate heat
exchanger which is based on the counterflow
technology. The incoming and outgoing air flows in a
counterflow plate heat exchanger use separate chan-
nels, and thanks to this the heat exchanger does not
return any odours back into the room air. It also does
not return moisture and is therefore very well suited to
dwellings with high humidity (eg abundant sauna and
laundry).
The heat exchanger operates with the best possible effi-
ciency in all conditions. This is possible with the demand
and learning defrosting technology, which steplessly
controls the heaters. Intelligent defrosting never leads
cold outdoor air past the heat exchanger, keeping the
supply air temperature constantly at a comfortable level.
1.6 Temperature
The supply air temperature is regulated by changing the
temperature efficiency, with an integrated air heater or
with an air cooler, which is sold as an accessory.
In Eco mode the ventilation unit works with the best
possible temperature efficiency. It must be noted here
that the higher the extract air temperature, the greater
the direct effect will be on the supply air temperature.
The supply air temperature can be adjusted if necessary
by warmer supply air.
In Comfort mode the supply air temperature is kept
even with the help of partially passing heat recovery, i.e.
by controlling the temperature efficiency. It must be not-
ed here that the unit is not able to produce supply air
that is cooler than the outdoor air.
The control mode for the supply air is selected from the
temperature control settings. The default mode is Eco.
The temperature setpoint can be adjusted using the
control panel, weekly program, operating mode selec-
tion or based on room temperature.
Automatic summer night cooling recognizes the
need for cooling. The function lowers the supply air
temperature setting and bypasses the heat exchanger
for best cooling performance. The unit can’t produce
cooler supply air than the outside air.
The unit can be equipped with an optional cooling coil,
which allows active cooling of the supply air.
1.7 External connections
Plug-in modules are available for external connections.
Wide variety of IO functions are available.
The ventilation unit is equipped with In-build Modbus.
Modbus cabling can be made easily with external mod-
ule (SEM). Unit can be fully controlled via Modbus.
1.8 Protective functions
The heat exchanger freeze protection
The defrosting function guarantees continuous ventila-
tion even during extreme conditions.
The fan overheating protection
The fan overheat protection stops the fan if the tempera-
ture rises too high and is reseted automatically. If protec-
tion stops the fans an alarm is generated.
Electric air heaters
The electric heater is equipped with automatic and
manual overtemperature protection. Overheat cuts the
heating circuit and generates an alarm.
Water-based air heaters
The ventilation unit with water-based air heater/cooler
has a temperature sensor that protects the coil from
freezing. Protection generates the alarm and starts
freezing prevention. If freezing prevention is not enough
the unit is stopped and demanded shut-off dampers are
closed. Freezing prevention is reseted automatically.
Cold supply air
The ventilation unit has built-in condensation protection.
If the supply air is too cold, the ventilation unit stops and
an alarm is generated
High temperature
If supply air or units internal temperature is detected
dangerously high the unit is stopped and an alarm is
generated.
Temperature sensors
If a sensor fault is detected, the ventilation unit runs in
restricted mode. The ventilation unit’s returns to normal
mode once the fault has been corrected.

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2. Installation
2.1 Unboxing
The ventilation unit is delivered in a cardboard box.
Remove the staples to open the box cover. The best way
to take the unit out is by opening the vertical seam of the
cardboard box and spreading it out from around the unit.
2.2 Lifting the ventilation unit
The ventilation unit is heavy and is not intended to be
moved by hand. When installing the ventilation unit, it is
lifted with a suitable lifting device that lifts evenly from
the bottom of the unit.
2.3 Ventilation unit’s installation site
The temperature in the space where the unit will be installed
must be more than +10 °C. The ventilation unit can be
installed in a machine room, laundry room, store room, etc.
Due to the risk of disruptive noise, the ventilation unit
should not be installed on the wall towards the living
room or bedroom.
Make sure it is easy to access the power and control
cables as well as accessories.
The ventilation unit can be mounted either on the wall
with a wall mounting bracket or on the ceiling with a
ceiling mounting frame. The required mounting bracket
is purchased separately as an accessory.
The unit should be installed on the wall and ceiling so
that the ducts remain above the ceiling surface. The
space between the unit and the wall/ceiling must be
insulated to prevent the transmission of sound coming
from the rear wall and top of the unit to the room.
Particularly noteworthy; if the unit is not mounted on
the ceiling, the sound from top of the unit and from the
duct connections must be isolated from the room space.
Connect the extract air from a CASA cooker hood, if in-
stalled, via a duct to the extra duct connection spigot on the
top side of the ventilation unit, which on delivery is plugged.
2.3.1 Wall mounting
If the wall is composed of vertical studs and wallboards,
the wall must be reinforced with horizontal studs that
will support the weight of the unit. Swegon also recom-
mends that the wall be insulated with mineral wool or
similar insulation for preventing sound from propagat-
ing to other rooms.
Screw the wall mounting bracket firmly in a horizontal
position onto the wall where a wall stud will support
the weight of the unit. Lift the ventilation unit onto the
wall mounting bracket so that the ears on the bracket
engage in the corresponding notches at the top on the
backside of the unit.
The ventilation unit’s door and heat exchanger can be removed
to make it easier to lift the unit. See the ”Service” section.
Set the final position of the ventilation unit with the
help of the adjustable anti-vibration mountings so that
the ventilation unit tilts slightly backward.
1
2
1.Horizontal stud for the ventilation
unit’s mounting bracket
2.Acoustic insulation
123
1.Insulated wall
2.Horizontal stud
3.Wall mounting
bracket
Wall mounting bracket’s dimensions
299299
505
68
54
14
505
370 300
76
299299
505
68
54
14
439

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2.3.2 Ceiling mounting
The ventilation unit can be mounted on the ceiling with a
ceiling mounting bracket which is available as an accessory.
Fasten the ceiling mounting frame in ceiling anchor
sleeves with four M8 threaded rods. The length of rods
must be adjusted so that they will be positioned max.
15 mm under the inner surface of the ceiling mounting
bracket. Otherwise, the rods will hit the upper surface of
the ventilation unit. Install at least three threaded rods in
the corners of the ceiling mounting bracket. To avoid a
possible collision with the ducts, one of the threaded rods
can be located in the hole next to the corner.
Screw in the M8 nuts onto the threaded rods to such a
height that the ceiling mounting bracket will be hori-
zontal when the top of the frame goes against the nuts.
Fit the ceiling mounting bracket through the selected
holes towards the nuts of the threaded rods and lock
the frame into position with nuts from underneath.
Adapt the installation height so that the locking pins in
the mounting bracket’s front section will stay sufficiently
far below the ceiling.
Important
Improper tightening of the ceiling moun-
ting bracket can cause the bracket to warp
and the unit will not fit in it.
!!
Run the mounting hooks through the assembly open-
ings above the ventilation unit and secure them with
tension rivets. Position the hooks so that the sharp point
is facing the rear side of the ventilation unit.
The hooks must absolutely not be secured with riv-
ets directly above the ventilation unit.
Run the power supply and control cables through the
ceiling mounting bracket.
Screw the anti-vibration mountings in position on the
lower edge of the rear wall of the ventilation unit before
lifting the unit onto the bracket. The ventilation unit’s
door and heat exchanger can be removed to make it
easier to lift the unit. See the ”Service” section.
Lift the ventilation unit so that the hooks go through
the fastening holes in the mounting bracket. The venti-
lation unit is locked in place when the locking pins are
touching the front plate of the mounting frame and
can be seen from the openings on the front edge of the
frame. (see picture)

x
Finally adjust the position of the ventilation unit using
the adjustable anti-vibration mountings, so that the unit
tilts backward by a few degrees. Make sure that a hard
twist is not subjected to the ceiling mounting bracket.
2.4 Condensate discharge
Connect the discharge hose to the ventilation unit’s con-
densate discharge connection (3/8” male threads). The
condensate is led off to a floor drain or the like using a
hose or pipe with an inner diameter of at least 12 mm.
The hose must not be led off directly to the drain. The
tube must not have a second water trap or be run hor-
izontally. The damming height of the water trap should
be at least 100 mm.
Check that the condensate discharge outlet is not
clogged and check its outflow by pouring water on the
bottom of the ventilation unit. The condensate discharge
connection is located on the rear of the unit under the
heat exchanger.
A hose to lead off the condensate is available as an
accessory (CDH3). The hose has a ready-made loop that
serves as a water trap.
200 mm

3/8” male thread
The metal water trap (UVL) is available as an accessory.

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It is important to the ensure the tightness of the vapour
barrier at the penetration collars. We recommend the
use of a mounting frame with vapour barrier designed
for the ventilation unit (accessory, W3:PW080YP / W4:
PW100YP) for sealing the vapour barrier.
2.5.1 Enabling kitchen bypass
The ventilation unit has extra duct connection for ex-
tract air from the cooker hood. The extract air from the
cooker hood flows directly out through the unit’s extract
air fan and does not pass the heat exchanger. For this
reason, the kitchen’s general ventilation must not take
place via the cooker hood. On delivery, the duct outlet
that bypass the heat exchanger are fitted with cover.
The duct between the cooker hood and the unit must
be installed in such a way that it’s possible to clean it
from outside of the unit.
Important
The kitchen bypass is intended for use
when the air flows from the cooker hood/
kitchen are boosted. The kitchen’s general
ventilation must take place via the extract
air duct. If the general ventilation takes
place continuously via the cooker hood, the
supply air and extract air flows through the
heat exchanger will be out of balance, and
this will lower the efficiency and impair
the ventilation unit’s anti-freeze protection
functions during the winter.
!!
2.5 Ducts
Important
Check whether the ventilation unit is a left
or right-hand version, to be sure to connect
the ventilation ducts to the correct duct
connections.
!!
R. Right-hand version
L. Left-hand version
1.Supply air
2.Extract air
3.Outdoor air
4.Exhaust air
5. Extract air from the
cooker hood
Install the ducts according to the ventilation drawings.
Do not mount ducts directly against structural elements
to avoid the propagation of sound.
Insulate the ventilation ducts to prevent leakage of heat,
cold and sound, as well as water condensing. Fire insulate
the ducts according to national regulations. Pay particular
attention to insulate cold ducts without gaps in the
insulation, so that moisture cannot condense.
The thickness of the insulation must be sufficient for the
insulation material, for the climate area and according
to local regulations. Most manufacturers of insulation
material offer calculation programs for the calculation of
correct and sufficient insulation.
Supply air duct should be fitted with acoustic insulation
along the stretch between the unit duct outlet and the
sound attenuator, so that fan sound will not be propa-
gated out into the room.
Generally, ventilation ducts should be insulated as follows:
• Insulate the outdoor ducts that pass through warm
spaces.
• Exhaust air ducts should always be insulated in ac-
cordance with national regulations.
• Insulate supply air ducts in cold spaces.
• Insulate extract air ducts in cold spaces.
• If the air inside the duct is colder than in the sur-
roundings; the insulation should be protected by a
vapour barrier.

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2.6 Electric and control cables
The ventilation unit has a power cable with earthed plug.
The plug serves as the ventilation nit’s main switch and
should be connected to an easily accessible wall socket.
There is a modular cable on top of the ventilation unit to
control the unit. The maximum length of the modular
cable is 40 meters. If you route the modular cable within a
building element, the cable must be routed in a ∅20 mm
conduit, bearing in mind any subsequent cable replacement.
Ensure during the installation of the ventilation unit that
it is easy to access the cable connectors, among others,
for servicing and setting up.
Accessories are either connected to the ventilation unit’s
four-way connector (2 extra functions) or the external
connection modules (3 extra functions). The cables are
routed through the cable entries that are on top of
the ventilation unit. The connection of accessories is
described in the section “Units external connections”.
Connection cables for connection modules and accesso-
ries are not included in the supply.
2.7 Installation of the Smart control panel
A maximum of two Smart control panels can be con-
nected to the ventilation unit. These should be con-
figured with different ID numbers (Settings/Display/
Display ID). A Smart control panel can be mounted up
to 40 meters from the unit (using 2 x 20 meter long
modular cables).
The front panel on the Smart control panel is released
using a screwdriver to push the retaining clips through
the holes on either side.
If several control panels are connected in chain, the
middle panel’s bus termination is moved to the “Open”
position. The jumpers do not need to be adjusted if only
one control panel is used.
Bus termination: OpenBus termination: Terminated
The modular cable can be connected to any outlet
socket on the panel.
Finally, refit the front panel.
Important
Only a qualified electrician may carry out
electrical installations, according to natio-
nal regulations.
!!
A. Cable entry for accessory cables.
B. Terminal blocks for connection of accessories.
B
A

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2.8 Smart automation packages
• Auto humidity control (SRH)
• Auto Home/Away/Boost function + Auto humidity
control (SRHCO2)
• Auto Air Quality control + Auto humidity control
(SRHVOC).
The ventilation unit has a connection cable for the
sensor package. The sensor package is secured with a
clip on the bottom of the case. The installation position
for the Sensor package is located behind the summer
bypass damper in the extract air chamber.
The position of the sensor package in the ventilation
unit is shown in the image below. The extract air filter
and the heat exchanger must be dismantled from the
ventilation unit, and the summer bypass damper must
be set to the “winter” position, while the installation is
performed.
All sensor combinations are encapsulated in the same
way. If there is a sensor package version installed in
the ventilation unit, you can replace it with an optional
sensor package. See the section Functions and use for
information about the automatic functions.
2.9 Accessories
Installation instructions for accessories are included in
the delivery of the each product.

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3. Basic commissioning
Commissioning is made from the password-protected
“Settings” menu on a Smart control panel. To open the
menu, enter code 1234. (The code can be changed).
Settings
Airflow adjustments
IO controls
Smart functions
Heating / Cooling
Defrost settings
Modbus
Reset factory settings
Change service code
3.1 Air flows
Particular airflows should be found from house venti-
lation plan. The units air flow curves are found in the
section “Technical data”. A qualified person should ad-
just the ventilation air flows with the help of measurement
equipment so that they correspond with the ventilation plan.
Air flows for all basic operating modes must be set
so that the ventilation unit works correctly! Enter
the settings in the commissioning report.
Before you start to adjust the air flows, ensure that the
filters are clean and that there are no foreign objects or
debris inside the ventilation unit.
3.1.1 Setting the basic air flows
Choose commissioning mode. The ventilation unit’s fans
run at the selected speed and functions, such as anti-freeze
protection and heat exchanger by-pass, are disabled.
Airflow adjustments
Commissioning mode
Home (extract)
Away (supply)
Away (extract)
Boost (supply)
Boost (extract)
Travelling (supply)
Max Smart boost (supply)
50%
35%
38%
90%
92%
35%
82%
Control type Fan control
Home (supply) 48%
NOTE! Depending on the state of the ventilation unit, it
may take some time for the commissioning mode to be
activated. A message will appear on the screen.
Adjust the fan control (%) for the operating modes
Home, Away and Boost so that the planned air flow
rates are reached.
3.1.2 Travelling
Travelling mode reduces ventilation unit’s power con-
sumption. Travelling mode can be used when the home
is empty for long periods.
Adjust the supply fan control (%) for the Travelling
mode. The extract air flow is defined automatically
based on the basic air flows.
3.1.3 Maximum automatic boost
Automatic boost level can be limited if it’s disturbing.
Adjust the supply fan control (%) for the max Smart
boost. The extract air flow is defined automatically
based on the basic air flows.
3.1.4 General notifications
In new homes, there is still construction moisture and the
higher ventilation level is needed to remove the moisture.
If there is a sauna, pool or other moisture producer in
the home, It is recommended to boost ventilation on
demand. This can be managed with Smart humidity
control or active use the ventilation unit’s boost mode.
Before commissioning, all tasks in Installation section must be completed. Before the ventilation system can be taken in
use, the basic supply and extract air flows must be adjusted. If cooker hood is used, the cooker hood function boost air
flow and balancing should be adjusted. If the automatic Home/Away/Boost Smart function is used it must be commis-
sioned, see section 4.
Important
The system should be commissioned by a
qualified person. The air flows must not be
changed by the user, because it could dis-
rupt the ventilation system operation.
Air flows must be adjusted according to the
local regulations.
Never adjust the air flows under the units
specified minimum.
!!

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3.2 Cooker hood function
The cooker hood function balances the air flows when the
cooker hood is used. This will help to prevent house nega-
tive pressure and improves fume extraction capability. The
ventilation boost level during the function can be defined.
The function starts automatically when the damper in a
Swegon CASA cooker hood is opened or when a cooker
hood defined IO is active.
The function and the air flows can be commisioned
from the menu Settings/(1234)/Smart functions/Cooker
hood boost.
Cooker hood function
Home state Compensation
Boost state Compensation
10%
Hood boost
0%
Roof fan
30%
In use
Commissioning mode
Choose commissioning mode. The ventilation unit’s fans
run at the selected speed and functions, such as anti-freeze
protection and heat exchanger by-pass, are disabled.
Open the cooker hood damper.
Define the cooker hood air flows in order to adjust
function values.
Home state Compensation. Adjust the Home mode
compensation value so that the supply and extract +
cooker hood air flows are in balance. Compensation
increases supply air flow. (If roof fan compensation is
selected, the extract air flow is first reduced).
Boost state Compensation. Fine tune Boost mode
compensation value if necessary.
Hood boost adjusts the ventilation level during the func-
tion, for example, to achieve sufficient discharge velocity
or odour extraction.
Choose Roof fan when using a cooker hood which is
connected to the roof fan. Compensation is achieved by
slowing the extract air fan.

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4. Units external connections
4.1 Modbus
Unit has in build Modbus RTU interface (slave) and it’s
available in a SEC* or SEM* module. SEC IO-extension
cable Modbus interface is designed for single point
connection. SEM IO-extension module Modbus interface
is designed for easy connection to large network with in
and out connectors for A, B and for two shield or ground
connectors.
Installation
Install Modbus network cabling as described in external
connections diagram.
NOTE! Install bus termination to chains last unit (in SEM
use bus terminated jumper, JP1).
NOTE! Shielded cable must be grounded only from one
point (master). SEM has two internally connected connec-
tors for shield/ground chaining.
Settings
Modbus settings can be changed in Settings/(1234)/
Modbus menu.
Modbus
Address
Baud
1
Data bits
38 400
Stop bits
8
Parity
1
Smart Access
None
If Smart Access is connected to the SEC/SEM module
select Smart Access for correct settings. Normally Smart
Access cable should be connected inside electrical box.
Register access
Modbus registers defined in registers list are direct ac-
cessible without password. All defined registers are PLC
addresses (base 1). Most commonly used registers are
listed below.
Holding control registers
4x5001
38 400
Operating mode 0 = Stop
1 = Away
2 = Home
3 = Boost
4 = Travelling
4x5018
38 400
Emergency stop 0 = Disabled
1 = Active
2 = Over
pressurising
4x5101 Temperature setpoint°C
4x5406 Reset all alarms 1 = Reset
This section contains information to connect ventilation unit to external devices or system. The unit has in build Modbus
RTU interface to complete control. The units operating modes and functions can be controlled with switch inputs (DI)
or with voltage (0...10 V). The unit state can be monitored from relay outputs or voltage output (0...10 V).
*) Accessory
Input registers
3x6201 Fresh air temperature 0,1 °C
3x6203 Supply air temperature 0,1 °C
3x6204 Extract air temperature 0,1 °C
3x6213 CO2 PPM
3x6214 RH %
3x6217 VOC PPM eqv.
3x6205 Supply fan RPM 1/s
3x6206 Extract fan RPM 1/s
3x6301 Unit state 0 = Ext. stop
1 = User stop
2 = Start
3 = Normal
4 = Commissioning
3x6302 Operating mode 0 = Stop
1 = Away
2 = Home
3 = Boost
4 = Travelling
3x6136 Combined alarm See full list
3x6137 Combined info See full list
Full register list:
www.swegon.com

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4.2 Switch inputs (DI)
Unit operating modes and functions can be controlled
with switch (digital) inputs. All inputs are configurable to
any operation, and input polarity (NC/NO) can be select-
ed. The unit has two inputs (IO1 and IO2). SEC/SEM*
modules has three inputs more (IO3, IO4 and IO5).
Installation
Install switch devices to selected inputs (IO1-IO5) and
ground.
Settings
IO settings can be changed in Settings/(1234)/IO controls
menu. Configure input type to switch input. Select ac-
tive state according to application. Closed selection will
active function when input is connected to ground (NO).
Operations
Select required switch function:
1. Emergency stop
Emergency stop when input active.
2. Stop
Unit stopped when input active.
3. Fireplace
Fireplace function activated by input pulse, function
time defined in Smart settings.
4. Hood
Cooker hood function active when input active.
5. Central vacuum (CVC)
Central vacuum cleaner function active when input
active.
6. Boost force
Boost mode active when input active, overrides
Away mode.
7. Away
Away mode active when input active.
8. Boost
Boost mode active when input active.
9. Modbus (not priority)
Input status can be read from Modbus.
10. Relay control (not priority)
Input status can control relay output.
11. Emergency stop resettable
Emergency stop activation. Emergency stop is reset
from user panel.
12. External alarm.
Alarm indication for external devices.
*) Accessory **) Instructions are supplied with accessory
4.3 Voltage inputs (AI)
Unit operating modes can be controlled with analog
voltage (0...10V) and different sensors can be connected
to voltage inputs. The unit has two inputs (IO1 and IO2).
SEC/SEM* modules has three inputs more (IO3, IO4 and
IO5).
Installation
Install control or sensor cable to selected inputs (IO1-IO5)
and ground.
Settings
IO settings can be changed in Settings/(1234)/IO controls
menu. Configure input type to voltage input.
Operations
Select required analog input function:
1. Operating mode
Operating mode control 0...10 VDC (+/- 0.5 V)
0 V = Control disabled
1 V = Travelling
2 V = Away
5 V = Home
8 V = Boost
10 V = Stopped
2. Operating mode, stepless
Operating mode control 0...10 VDC (+/- 0.5 V)
0 V = Control disabled
1 V = Travelling
2 V = Away
Stepless control between Away and Home
5 V = Home
Stepless control between Home and Boost
8 V = Boost
10 V = Stopped
3. Modbus AI
Analog voltage can be read from Modbus.
4. PA supply air**
5. PA extract air**
6. l/s (supply air)**
7. l/s (extract air)**
8. RH AI**
9. CO2AI**
10. VOC AI**

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4.4 Relay outputs
External devices or systems can be controlled with relay
control outputs (+ 24 VDC). The units two inputs (IO1
and IO2) can control external relays. SEM* module has
one inbuilt relay (IO3) and two outputs for external relays
(IO4 and IO5). IO5 is grounding digital output for direct
connection to automation system.
Installation
Install external relay or system according to drawings.
NOTE! The control card can be damaged if you short-
circuit the IO connection selected by the relay output.
Settings
Relay settings can be changed in Settings/(1234)/IO con-
trols menu. Configure input type to relay output. Select
active state according to application. Closed selection
will close/activate the relay output when function is
active (NO).
Operations
Select required relay function:
1. Damper
Output is active when unit is running.
2. Away
Output is active when unit is in Away mode.
3. Boost
Output is active when unit is in Boost mode.
4. Modbus
Output is controlled with Modbus.
5. DI control
Output is controlled with digital input. Switch input
must be defined as relay control. Relay output mini-
mum and/or maximum active time can be defined
from IO controls menu.
6. Manual on
Output is always on.
7. Travelling
Output is active when unit is in Travelling mode.
8. Service.
Output is active when service reminder is active.
9. Critical alarm
Output is active when critical alarm is active. Unit is
operating in restricted mode.
10. Alarm
Output is active when any alarm is active.
4.5 Voltage outputs (AO)
External devices or systems can be controlled with analog
output (0...10 V). SEM/SEC* module has one analog
output (AO4).
Installation
Install device or control cable to AO4 and ground.
Settings
IO settings can be changed in Settings/(1234)/IO con-
trols/AO4 menu.
Operations
Select required output function:
1. Operating mode
Operating mode output 0...10 VDC
0 V = NA
1 V = Travelling
2 V = Away
5 V = Home
8 V = Boost
10 V = Stopped
2. Operating mode, stepless
Operating mode output 0...10 VDC
0 V = Control disabled
1 V = Travelling
2 V = Away
Stepless output between Away and Home
5 V = Home
Stepless output between Home and Boost
8 V = Boost
10 V = Stopped
3. Temperature setpoint
Temperature setpoint (10-30 °C) corresponds to 0...10 V.
4. Modbus
Output is controlled with Modbus.
4.6 Smart Access
Unit can be controlled, monitored and commissioned
with web service Smart Access*. Smart Access allows
automatic alarm and service notifications through email.
Smart Access provides unit specified links to spare parts
and filter web shop and to Casahelp.
Installation
Install Smart Access device cable to unit internal con-
nector or connect cable to SEC/SEM (Modbus and IO4).
Connect Smart Access to public internet with ethernet
cable (ETH connector).
Settings
If Smart Access is connected to internal connector no
settings are required.
If Smart Access is connected to SEC/SEM module select
Smart Access enabled in Settings/(1234)/Modbus menu.
Operations
Read the QR code from Smart Access device with smart
device and follow the instructions.
*) Accessory

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IO2
IO1
GND
24V / (5V)
8
9
A1
A2
A1
A2
2 x 0,5
2 x 0,5
5-24V
IO5
IO1-IO4
GND
32
BUS TERMINATIONBUS TERMINATION
5
4
10
102TKC
2 x 0,5
IO1 - IO5
GND
11 2
1
3
117KHH
2 x 0,5
IO1 - IO5
GND
12 1
NC
2
3
NO
230V AC 50Hz
105A1
2 x 0,5
2 x 1,5
IO1 - IO5
GND
14
G+
G0
OUT1
OUT2
M
Relay
Relay
OUT4
117HDL
4 x 0,5
IO1 - IO5
GND
GND
24V
15
G+
G0
OUT1
OUT2
M
Relay
Relay
OUT4
117HDL
3 x 0,5
IO1 - IO5
GND
24V
13 P
117PK2
2 x 0,5
IO1 - IO5
GND
2
1
3
16
102LT
2 x 0,5
2 x 0,5
IO1 - IO5
GND
IO1 - IO5
GND
24 V
Smart Extension Modbus module
Smart unit
SEM
Modbus in
8 7 6 5 4 3 2 1
+5VIO5 IO4 (IO3)AO4
max 250 V/ 6 A
Relay X1
NC
4 3 2 1
NC
1 2 3 4
AB oo
1 2 3 4
AB oo
Modbus out
JP1
Bus terminated
JP1
SEM
OPEN
TERMINATED
OPEN
TERMINATED
1
7
L
N
2 = Modbus B
1 = Modbus A
3 = IO 3
4 = IO 4
5 = IO 5
6 = AO 4
7 = 5 V Out
8 = GND
SEC
6
1 = GND
2 = AO 4
3 = GND
4 = (IO 3)
5 = IO 4
6 = IO 5
7 = GND
8 = 5 V Out
1. Ventilation units external connections
2. Swegon CASA Smart control panel (UP1)
3. Swegon CASA Smart control panel (UP2)
4. Connection points on the ventilation unit: IO1, IO2, 24 V / (5 V), selection from circuit board
5. SET-module, Smart Extension Temperature module, connection card for external duct equipment
6. SEC Smart Extension Cable, IO-extension cable with Modbus RTU (single point connector)
7. SEM Smart Extension Modbus module, IO-extension module with relay and Modbus RTU (in and out connectors)
8. External relay control, alarm signal, duct damper, status signal, Modbus
9. External relay control (earthed output), alarm signal, duct damper, status signal, Modbus
10. Fireplace/boost switch, for control of the fireplace function or boosting
11. Humidity sensor, for control of boosting
12. Timer, for control of the Away/Boost mode
13. Pressure switch, for control of the cooker hood/central vacuum cleaner function.
14. CO2sensor with relay, for activate the boost mode
15. CO2sensor, for control of Automatic Home/Away/Boost system
16. Presence sensor
External connections diagram

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Summer night cooling
Level
Fresh air limit
Fresh air start limit
5°C
User
14°C
Room temperature start limit Off
Supply air limit
Boost
Boost limit (room)
User
14°C
23°C
Full boost limit (room) 26°C
Use in away mode
Hood boost
In the shortcut menu only preset level and Boost are
selectable. To define advanced function settings select
“User”.
Summer night cooling level
Summer night cooling level is defined by cooling need
detection limits and by lowering supply air temperature
setpoint. With preset values the user can select cooling
level: off, low, normal, high or full. Fresh air limit deter-
mines at which outdoor air temperature the function is
allowed.
By default the cooling need is defined by outside tem-
perature calculations and room temperature changes.
If advanced settings (User) is selected the fresh air start
limit can be changed which effects to the cooling detec-
tion limits.
If “Room air temperature limit” is selected, the cooling
need is based on fixed room temperature start limit.
The supply air temperature setpoint is defined with
supply air limit during function. If the limit is changed,
the risk of condensation on the pipes must take into
consideration.
Summer night cooling stepless boost
Summer night cooling effect is enhanced with boosting
the ventilation if supply air temperature is relatively low.
With preset values the user can select boosting level:
off, low, normal, high or full.
If advanced settings (User) is selected the boost level can
be defined with room temperature boost limit and full
boost limit.
Select Use in Away mode to allow boost in Away mode.
Select Hood boost to open the damper on CASA Smart
cooker hood when summer night cooling is active.
5.1 Functions
The Smart functions can be activated from the control
panel shortcuts, Modbus or via external inputs. Some of
the functions are so-called background functions which
work by demand. Advanced settings can be accessed
from the “Settings/(1234)/Smart functions” menu.
Note, some settings may not be visible depending units
configuration.
Smart functions
Shortcuts
Summer night cooling
Cooker hood function
Central vacuum function
Fireplace function
Auto Home/Away/Boost
Auto RH control
Auto Air Quality control
5.1.1 Shortcuts
From the “Shortcuts” menu you can set which functions
are to be visible to the user. Boost selection effects to
Auto RH control, Auto air quality, Auto Home/Away/
Boost functions which are available.
Shortcuts
Fireplace function
Travelling
Central vacuum function
Boost
Summer night cooling
Heating boost
Shut down
5.1.2 Summer night cooling
Automatic Summer night cooling detects cooling need
and decreases the supply air temperature, if possible,
and boosts the ventilation. Temperature control is
applied with heat exchanger efficiency control and with
external cooling battery (accessory). Summer night cool-
ing is most efficcient when the outdoor air temperature
is relatively low.
5. Functions and use
This section contains functions detailed description, advanced settings and use. The advanced settings for the functions
can only be accessed from Smart settings with password (1234 / changeable). The normal user settings can be limited.
In the User manual the functions are only covered from the user point of view. User settings are accessed from the
Smart shortcut menu.

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The function’s settings can be adjusted from the
Settings/Smart Functions/Fireplace function menu.
Fireplace function
Run time
Speed difference 15 %
15 min
The function’s maximum level can be adjusted with the
Speed difference setting (max 25 %). The function is
applied by demand with first decreasing the extract air
flow and increasing the supply air flow if needed.
If problems occur with the chimney draught when
lighting the fire, the percentage value can be increased
slightly from the default value.
Use of the fireplace function repeatedly in extreme cold
can cause forming of ice in the ventilation unit.
5.1.6 Automatic Home/Away/Boost function
The function is available only on models equipped with
a CO2sensor. The function controls the ventilation
steplessly between away and boost levels by demand.
When the unit is controlled to away mode temperature
setpoint can be decreased to save even more energy.
The function should always be adjusted to ensure opti-
mal performance.
The function can be activated and adjusted from the
Settings/(1234)/Smart Functions/Home/Away/Automatic
Boost menu or from Smart shortcuts menu.
Auto Home/Away/Boost
In use
A+ now
Home limit
Away limit
750 ppm
700 ppm
500 ppm
The function is adjusted by defining the CO2limits for
Home and Away. When measured CO2value is be-
tween these values the air flow is controlled accordingly
between Away and Home. If CO2value is above Home
limit the air flow is boosted lineary and if CO2value is
below Away limit the Away mode is activated.
A suitable Home limit value can be defined by reading
the measured CO2level (A+now) from the menu when
a planned number of people are in the house. Similarly
the Away limit value can be defined by reading the
measured CO2level (A+now) from the menu when a
house is empty and the CO2level is settled.
The ventilation can be raised when people are at home
by decreasing the Home limit. The away mode can be
activated earlier by increasing the Away limit.
NOTE! The function is only visible if the CO2sensor has
been detected.
NOTE! Measured CO2value depends on the ventilation
system but the function is calibrated with the limits.
5.1.3 Cooker hood function
The cooker hood function balances the air flows when the
cooker hood is used. This will help to prevent house nega-
tive pressure and improves fume extraction capability. The
ventilation boost level during the function can be defined.
The function starts automatically when the damper in a
Swegon CASA cooker hood is opened or when a cooker
hood defined IO is active.
The balancing is applied with increasing the supply air
flow. If cooker hood is connected to separate extract
duct and roof fan is selected the balancing is first de-
creasing the extract air flow and increasing the supply
air flow if needed.
Commissioning and settings for the cooker hood function
is described in Basic commissioning section.
5.1.4 Central vacuum function
The central vacuum function balances the air flows
when the a central vacuum cleaner is used. This will
help to prevent house negative pressure and improves
the cleaning result. The function can be started by ex-
ternal switch connected to input configured as the CVC.
The function will then be activated automatically when
the central vacuum is on.
The function can also be started from a Smart control
panel, the function runs until the set time has elapsed
(Run time).
The function’s settings can be adjusted from the Settings/
(1234)/Smart Functions/Central vacuum function menu.
Central vacuum function
Run time
Compensation 20%
30 min
The function's balancing level can be adjusted with
the Compensation setting (max 50 %). The balancing
is applied with first decreasing the extract air flow and
increasing the supply air flow if needed.
5.1.5 Fireplace function
The fireplace function helps lighting the fire and en-
sures that no excess under pressure is generated. The
function can be started from Smart shortcuts menu or
by external switch connected to input configured as the
fireplace function (IO-control).
Problems caused by too little draught in a fireplace
usually occur in the autumn, when the temperature
difference between the indoor and outdoor air is slight
and the chimney is cold. The Fireplace function attempts
to help the situation by giving a temporary positive pres-
sure in the home when the fireplace is lighted.
After the lighting phase the function prevents the excess
under pressure formation. The function Run time can be
changed from the settings (max. 60 min). The function
can be stopped from the control panel.

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5.1.7 Automatic humidity control
The function is available only on models equipped with
a humidity sensor. The function boosts the ventilation
steplessly by demand. For example if humidity in the
house rises due to showering.
If the humidity level (RH) remains above 60 % for a long
period, we recommend that the ventilation is boosted
and the humidity source is investigated.
The function can be activated and level selected from the
Settings/(1234)/Smart Functions/Auto RH control menu or
from Smart shortcuts menu.
Auto RH control
Level
Boost limit
Full boost limit
Boost delay
30 % + RH
Boost during dela
y5
%
5 % + RH
User
0 min
The user can select preset boost levels in the shortcut
menu (off, low, normal, high or full). The preset levels
define Boost limit and Full boost limit. To define these
limits manually select “User” level.
The ventilation is boosted steplessly when the humidity
has risen from average Boost limit defined amount. The
maximum ventilation boost is reached when the humidi-
ty has risen the Full boost limit defined amount from the
average.
The boost can be increased by decreasing the Full boost
limit.
The boost start can be delayed with Boost delay. (The
delay is started when humidity is stabilized after show-
er or sauna.) Fixed boost level during the delay can be
defined.
NOTE! The function is only visible if the sensor has been
detected. The function is enabled automatically when
the sensor is detected.
NOTE! Humidity is measured from extract air and it
represents average of the whole house.
5.1.8 Automatic air quality control
The function is available only on models equipped with
VOC sensor. The function boosts the ventilation step-
lessly according to air quality level.
The function can be activated and level selected from
the Settings/(1234)/Smart Functions/Auto Air Quality
control menu or from Smart shortcuts menu.
Auto Air Quality control
Level
AQ now
Boost limit 800 ppm
750 ppm
User
Full boost limit 1500 ppm
The user can select preset boost levels in the shortcut
menu (off, low, normal, high or full). The preset levels
define Boost limit and Full boost limit. To define these
limits manually select “User” level.
The ventilation is boosted steplessly when the VOC has
risen over Boost limit. The maximum ventilation boost is
reached when the VOC has risen to the Full boost limit.
Appropriate values can be established based on the AQ
now value shown in the menu.
The boost can be increased by decreasing the Full boost limit.
NOTE! The function is only visible if the sensor has been
detected.
NOTE! VOC measurement reacts on air quality changes
and absolute value can vary highly but by selecting suit-
able boost level the function works effectively.
5.1.9 Weekly program
The ventilation unit’s functions can be controlled with a
maximum of four different weekly programs.
Operating mode and temperature for each program can
be selected. Time limits and weekdays for the programs
can be selected.
Smart boost can be disabled for a desired time, e.g.
during the night by selecting Silent mode.
Weekly programs can be enabled and settings can be
made from Main menu/Weekly programs menu.
NOTE! Program 1 has highest priority and program 4
lowest. Highest priority overrides other active programs.
Program 1
State
17°CTemperature
Start time
Stop time
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Away
Sunday
07:00
16:00