4
W3/W4.170420
All rights to changes reserved.
www.swegon.com
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 fu
Auto humidity control (CO
2
+ RH)
- Auto Air Quality c 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 m
2
and W4 for less than 200 m
2
detached 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
