Flexit Nordic CL3 User manual

117582-01
2019-09
USER MANUAL
Air handling unit
Nordic CL3
ART.NO. 800200, 800201
Flexit
GO

2
NORDIC CL3

3
NORDIC CL3
Contents
1. Automatic control..............................................................................................................6
2. Functional description of balanced ventilation .............................................................7
2.1. Fans (M1, M2) .......................................................................................................................7
2.2. Filters (FI1, FI2)......................................................................................................................7
2.3. Rotor (HR-R) ..........................................................................................................................7
2.4. Heating element (EB1)........................................................................................................7
2.5. Temperature sensors (B1, B4)..........................................................................................7
2.6. For use with dampers.........................................................................................................7
2.6.1. Damper (DA1).........................................................................................................7
2.6.2. Damper (DA2).........................................................................................................7
3. Operating the door ...........................................................................................................8
3.1. Lock.........................................................................................................................................8
3.2. Removing the door..............................................................................................................8
4. Cleaning and maintenance ..............................................................................................9
4.1. Cleaning the fans .................................................................................................................9
 &KDQJLQJWKHȴOWHUV ...........................................................................................................11
4.3. Changing the brush strips ...............................................................................................12
4.4. Cleaning the rotor .............................................................................................................14
4.5. External cleaning................................................................................................................14
5. Maintenance table ..........................................................................................................15
6. Troubleshooting ..............................................................................................................16
7. Complaints .......................................................................................................................17
8. Disposal............................................................................................................................17
9. CE Declaration of Conformity ........................................................................................17

4
NORDIC CL3
FRONT FRONT
DANGER! DO NOT
TOUCH
Symbols used
These products bear a number of symbols used for
labelling the actual product and in installation and user
documentation.
Extract air Extract air
from kitchen
Outdoor air
Supply air
Exhaust air
DANGER:
ELECTRICITY
EXAMPLE OF NIPPLE LOCATIONS
(shown as a right model)
EXAMPLE OF NIPPLE LOCATIONS
(shown as left model)
INFO! When a text box is this
FRORXULWbPHDQVWKDWLWFRQWDLQV
important information.
i
!
CAUTION! When a text box is this
colour, it means that material
damage may be the consequence
of not following the instructions.
!
DANGER! When a text box is
this colour, it means that a life-
threatening or serious personal
injury may be the consequence of
not following the instructions.
!
NOTICE! When a text box is this
colour, it means that a poor
utilisation ratio or product
operating issues may be the
consequence of not following the
instructions.

5
NORDIC CL3
!SAFETY
INSTRUCTIONS
!
• Tumble dryers must not be
connected to the unit.
• The room must have a separate,
adequate air supply when
products such as gas cookers,
gas heaters, fireplaces, wood-
burning stoves, oil-fired boilers,
etc., are used.
!
• This unit is only designed for
ventilation air in homes and
commercial buildings.
• To maintain a good indoor
climate, comply with regulations
and avoid condensation damage,
the unit must never be stopped
apart from during service/
maintenance or in connection
with an accident.
• The unit must not be operated
without the filters being in place.
• All plumbing work must be
carried out by an authorised
plumber.
• The location of the water battery
must be approved by a plumber
owing to the risk of water leaks.
!
• To avoid the risk of fire, electric
shock or injury, read all the safety
instructions and warning texts
before using the unit.
• All electrical connections must
be carried out by qualified
electricians.
• If the power lead is damaged, it
must be replaced by the
manufacturer, the manufacturer’s
service agent or a similarly
qualified person.
• The unit must not be used to
extract combustible or flammable
gases.
• It is the installer’s responsibility to
carry out a full safety and function
assessment of the appliance.
• Before opening the door: switch
off the heat, let the fans continue
IRUbPLQXWHVWRUHPRYHKRW
air, unplug the unit and wait
2 minutes before opening the
doors, as the unit contains
elements that must not be
touched when hot.
• This appliance may be used by
children of 8 years or above or
by persons with reduced sensory
capacity or reduced physical or
mental capacity, or by persons
lacking experience or knowledge,
provided they have received
instruction in the safe use of the
appliance or are supervised to
ensure safe use and providing
they are aware of the risks.
• The product is not suitable for
use by children. Children must
not be allowed to play with the
appliance. Children must not
carry out cleaning or maintenance
without supervision.

6
NORDIC CL3
1. Automatic control
These instructions only describe how to use the
ventilation unit and do not go into the details of
installing/using automatic control.
For more information on the automatic control system,
VHHZZZȵH[LWQR
Alternative user interfaces:
• Flexit GO app (standard)
To control the ventilation unit via a smartphone/tablet,
download the app from Google Play or the App Store.
See startup guide for installer (116628) and startup
guide for end user (116908).
For installer, see
startup guide
(116628).
For end user,
see startup guide
(116908).
Flexit GO app
(standard)
CI 70 control
panel (accessory)
See manual
(116081).
• CI 70 control panel (accessory)
See manual (116081).
Google Play App Store

7
NORDIC CL3
2. Functional description of balanced ventilation
2.6. FOR USE WITH DAMPERS
2.6.1. Damper (DA1)
There is a closing air damper in the exhaust air duct
WRbSUHYHQWFROGGUDXJKWV
2.6.2. Damper (DA2)
There is a closing air damper in the outdoor air duct
WRbSUHYHQWFROGGUDXJKWV
!
Adjustment must always be carried
out by qualified personnel before
the installation is used for the first
time.
2.1. FANS (M1, M2)
The fans ensure that air enters and leaves the building.
They can be individually adjusted for optimal operation.
7KHXQLWFDQEHUHJXODWHGDWWKUHHGL΍HUHQWVSHHGVYLD
the control panel: Home, Away, High.
2.2. FILTERS (FI1, FI2)
)LOWHUVZLWKDKLJKȴOWHUJUDGHDUHXVHGDVVWDQGDUGIRU
both supply air and extract air so that the air which
HQWHUVWKHEXLOGLQJLVFOHDQ7KHȴOWHUVDOVRHQVXUHWKDW
WKHXQLWVWD\VFOHDQDQGFDQPDLQWDLQWKHUPDOHɝFLHQF\
DQGDLUȵRZ
2.3. ROTOR (HR-R)
The air passes through the rotary wheel-type heat
exchanger (recovery system). The rotor functions as
a heat magazine. The heat from the extract air heats
up one part of the rotor. When the heated part comes
over to the supply air side, the heat is transferred to
WKHbVXSSO\DLU
2.4. HEATING ELEMENT (EB1)
ΖIWKHHQHUJ\UHFRYHUHGIURPWKHH[WUDFWDLULVLQVXɝFLHQW
WRPDLQWDLQWKHVHWVXSSO\DLUWHPSHUDWXUHDQbHOHF-
tric heating element will help raise the temperature.
7KHbKHDWLQJHOHPHQWLVSURWHFWHGDJDLQVWRYHUKHDWLQJE\
the thermostat (F20) which cuts out at high temperature.
For extra safety, the thermostat (F10) cuts out at critical
temperatures. Thermostat F10 needs to be reset man-
ually by pressing the reset button. See Reset button on
page 16.
2.5. TEMPERATURE SENSORS (B1, B4)
As standard, the unit has four temperature sensors.
7KHbVXSSO\DLUVHQVRU%UHJLVWHUVWKHWHPSHUDWXUH
after the heating battery. The extract air sensor (B3) reg-
isters the temperature of the extract air. The outdoor air
sensor (B4) registers the temperature of the outdoor air.
The exhaust air sensor (B6) registers the temperature of
the exhaust air.
FI1
HR-R
M1
FI2
M4
F20 F10
EB1 DA1
DA2
B1
B4
B3
M2
B6
(shown as a right model)

8
NORDIC CL3
3. Operating the door
3.1. LOCK
1. Turn the screw in the lock 90°.
2. Flip up the lock handle
3. The lock handle needs to be lifted right up to
release. Therefore press the lock handle right up
while opening the door.
1 2 3
90°
3.2. REMOVING THE DOOR
1. Release both bolts by sliding them in towards the
centre of the door.
2. 7KHGRRUFDQQRZEHOLIWHGR΍
1
2

9
NORDIC CL3
4. Cleaning and maintenance
!
Before opening the door: Turn the
heat off and allow the fans to run
for three minutes to remove hot
air. Unplug the unit and wait two
minutes before opening the door.
4.1. CLEANING THE FANS
The fan in a unit connected to a kitchen hood should be
inspected once a year. For a fan in a unit that is not con-
nected to a kitchen hood, inspection every three years
LVVXɝFLHQW&OHDQWKHIDQEODGHVZLWKDJUHDVHVROYHQW
on a cloth (e.g. methylated spirits) and compressed air if
possible.
NB: Take care that the motor is not exposed to water.
To avoid mixing the fans up, it is
best to disconnect one fan at a
time.
i
!
DANGER! The fan may fall out
when the fastening screws are
loosened.
TIP: You need a T20
To take out the fan:
1. Undo the screws in the electric cover and take the
FRYHUR΍
2. Disconnect the electric quick-release contact in the
electrical compartment by pressing in at the same
time as pulling the contact apart.
3. Pull the cable bushings out of the grooves so that
the cable with a quick-release contact comes too.
1
2
3

10
NORDIC CL3
4. Undo the two screws securing the fan to the
partition.
5. Turn the fan to the side so that the curved grid
clears the hole.
6. Remove the fan.
5
6
4

11
NORDIC CL3
4.2. CHANGING THE FILTERS
7KHȴOWHUVKDYHDOLPLWHGOLIHDQGWRSUHVHUYHDKHDOWK\
indoor air quality it is important to change them when
they are dirty.
+RZRIWHQWKHȴOWHUVQHHGWREHFKDQJHGGHSHQGVRQ
the degree of contamination of the air where they are
LQVWDOOHGΖQJHQHUDOWKHȴOWHUVQHHGWREHFKDQJHGDW
least once a year, preferably in the autumn (after the
pollen season). In areas with a lot of dust and contam-
LQDWLRQWKHȴOWHUVVKRXOGEHFKDQJHGLQWKHVSULQJDQG
autumn.
'LUW\ȴOWHUVFDQDPRQJRWKHUWKLQJVOHDGWR
• Reduced performance of the unit
• The unit becoming dirty
• Humidity damage
• Reduced indoor air quality
$ȴOWHUVXEVFULSWLRQLVUHFRPPHQGHGWRHQVXUHIXOO
EHQHȴWIURPWKHV\VWHP
!
Change both filters (supply air and
exhaust air) at the same time.
!
Make sure that the filter is not
damaged during fitting. A damaged
filter reduces the unit’s power and
air purity.
!
Check that the filter’s seal is intact
before inserting the filter.
Then push the filter properly into
place to prevent air leakage.
&KDQJLQJȴOWHUVLVYHU\HDV\
• *ULSWKHȴOWHUIUDPHDQGSXOOWKHȴOWHURXW
• ΖQVHUWDQHZȴOWHU+ROGWKHȴOWHUȇVRXWHUHGJHZKHQ
SXVKLQJLWLQ7KHVLGHRIWKHȴOWHUZLWKRXWDJDVNHW
should face the door.
&KDQJLQJWKHȴOWHUV

12
NORDIC CL3
1
4.3. CHANGING THE BRUSH STRIPS
The brush strips become worn over time. If they do
not lie tightly against the rotary exchanger, it may be
necessary to change them.
Alternatively, they may be moved closer to the rotor,
DVbWKHSURȴOHWKH\DUHPRXQWHGLQKDVWZRJURRYHV
!
DANGER! The rotor will fall out
when the brackets are loosened.
The rotor is heavy, so it is advisable to have several
people to remove it from the unit and put it back again.
TIP: You need a T20
Proceed as follows:
1. 8QGRWKHVFUHZVLQWKHHOHFWULFFRYHUDQGWDNHLWR΍
2. 'LVFRQQHFWWKHURWRUȇVTXLFNUHOHDVHFRQWDFWIURP
the circuit board. Also pull the cable lug out to dis-
connect the earth on the circuit board.
3. Pull the cable bushing out of the groove so that the
cable with the quick-release contact comes too.
4. Loosen the two screws on either side of the rotor.
5. Slide the washers sideways to release the rotor.
3 4 5
2

13
NORDIC CL3
6
87
LEVEL 1
LEVEL 2
9
6. Pull the rotor module out and position it with the
brush strip facing up.
7. )OLSR΍WKHEUXVKVWULSSURȴOHVZLWKDVFUHZGULYHUIRU
example. There are total of eight brush strips on the
rotor, four on each side.
Use a broad screwdriver so you can get good pur-
FKDVHZLWKRXWEHQGLQJWKHSURȴOH6WDUWDWRQHHQG
and continue to the other. Lift it carefully, bit by bit.
8. Pull the brush strips out of the groove.
Move the brush strips down to level 2, or replace
them with new ones if they are completely worn out.
9. 3UHVVWKHEUXVKVWULSSURȴOHEDFNLQWRSODFH
Push the rotor back into the unit. The rotor is heavy, so it
is advisable to have several people to put it back.

14
NORDIC CL3
4.4. CLEANING THE ROTOR
$KLJKLPSHUPHDELOLW\ȴOWHULVLQVWDOOHGLQWKHXQLW
ΖWbLVbQRWWKHUHIRUHXVXDOO\QHFHVVDU\WRFOHDQWKHURWRU
ΖIbIRUbDQ\UHDVRQLWVKRXOGVWLOOEHQHFHVVDU\GXVWFDQ
EHbUHPRYHGZLWKDVRIWEUXVK
Further cleaning is possible by removing the rotor, spray-
ing it with a grease solvent and then blowing it clean
from the opposite side. Distance approximately 60 mm
and max. pressure 8 bar.
Ensure that the motor is not exposed to water during
cleaning. Ensure that all seals around the rotor are intact
and tight. Ensure that there is no damage to the rotor
belt, and that the rotor rotates freely.
4.5. EXTERNAL CLEANING
Many kitchen surface cleaners contain chemicals that
PD\GDPDJHWKHSURGXFWȇVSODVWLFFRPSRQHQWV7KHUH-
fore use a soft cloth moistened with warm water and
DbQHXWUDOGHWHUJHQWWRFOHDQWKHRXWVLGHRIWKHSURGXFW
Do not use sharp objects, powerful
cleaners or scouring powder,
DVbVXFKSURGXFWVFDQGDPDJHWKH
surfaces.
i
Cleaners containing ammonia or
citrus must not
be used. Products that give
stainless steel an anti-fingerprint
coating must not be used either.
i

15
NORDIC CL3
5. Maintenance table
Component Action Interval
Filter Filters must be changed at least once a year. It is best to do this twice a year, before and after
WKHbSROOHQVHDVRQ&KHFNWKDWWKHȴOWHUVHDOLVFRPSOHWHO\WLJKW
6-12 months
Fans The fan in a unit connected to a kitchen hood should be inspected once a year.
)RUDIDQLQDXQLWWKDWLVQRWFRQQHFWHGWRDNLWFKHQKRRGLQVSHFWLRQHYHU\WKUHH\HDUVLVVXɝFLHQW
The fans should be cleaned as needed.
12 months
3 years
Recovery
system
Check that the surfaces are clean. Check that the sealing strips face in towards the rotary wheel-type
heat exchanger.
Check that the rotor belt is intact and not too slack.
3 years
Kitchen fan For a unit with exhaust from a kitchen fan connected:
:DVKWKHJUHDVHȴOWHU&KHFNWKDWWKHGDPSHULVFOHDQDQGFORVHVIXOO\
2 weeks
Seals &KHFNWKDWWKHVHDOVRQWKHGRRUXQGHUWKHȴOWHUVRQWKHIDQPRGXOHVDQGRQWKHURWRUPRGXOH
DUHbLQWDFW
12 months
Valves The supply air and extract air valves (for the bathroom, bedroom, laundry room, etc.) must be
cleaned at least once a year.
12 months
Air intake Check that no leaves or other items have caught in the grille.
The air intake can freeze up in winter and should be checked regularly (daily if necessary).
If necessary, it must be scraped clean so that the air can pass through.
12 months
Roof cowl If the unit has a roof cowl, this must be checked for leaves and the like. Also check that the drain
slots are open.
12 months
Ducts Check that the ducts are clean. 10 years
Brush strips Check that the brush strips are intact and sit tightly against the rotor. If they are worn, they can be
PRYHGWRWKHQH[WJURRYHLQWKHSURȴOHVRWKDWWKH\DUHFORVHUWRWKHURWRU
3 years
Inside unit A combination of a very low outside temperature and damp extract air can lead to the formation of
ice. Normally this will not be a problem – when normal operating conditions return the ice crystals
will be converted to steam and removed from the unit via the exhaust air. In the case of extreme
cold over extended periods the unit should be checked for ice.

16
NORDIC CL3
6. Troubleshooting
Type of fault Remedial action
Cold draughts Check what supply air temperature has been selected. See control panel.
Check that the rotor rotates.
Check that heating comes on.
1HZH[WUDFWȴOWHUQHHGHG
Fans not working Check that power is connected to the unit.
Check that the overheating thermostat has not cut out.
Restart the overheating thermostat by pressing the button*. It also has to be reset in the app or on the control
panel.
/RZDLUȵRZUDWH Check what speed the unit is set to.
&KHFNWKDWWKHȴOWHUVDUHWLJKW
Check the intake grille.
Reset button
The thermostat (F10) has to be reset manually by
pressing the reset button.
(right model)
*

17
NORDIC CL3
9. CE Declaration of Conformity
7KLVGHFODUDWLRQFRQȴUPVWKDWWKHSURGXFWVPHHWWKH
requirements in the following Council Directives and
standards:
2004/108/EC Electromagnetic compatibility (EMC)
2006/95/EC Low-voltage Directive (LVD)
2009/125/EC Ecodesign Directive
1253/2014 Ecodesign Regulation
2010/30/EC Energy Labelling Directive
1254/2014 Energy Labelling Regulation
327/2011 Fan Regulation
2002/95/EC RoHS Directive
2002/96/EC WEEE Directive
1907/2006/EC REACH Regulation
Our products have been tested in accordance with
SDUWVbRI
2006/42/EC Machine Directive (Safety)
Producer: FLEXIT AS, Televeien 15, 1870 Ørje,
Norway
Type: Nordic CL3 Ventilation Unit
Complies with the following standards:
Safety standard EN 60335-1:2012 + A11
EMF standard: EN 62233: 2008
EMC standard: EN 61000-6-3:2007 + A1:2011
EN 61000-6-1:2007
Ventilation for buildings,
components
EN 13142:2013
Ventilation for buildings,
performance characteristics
EN 13141-7:2010
Acoustics – Radiated sound ISO 9614-2:1996
Acoustics – In-duct sound
(In-duct method)
ISO 5136:2009
The product is CE-marked: 2019
FLEXIT AS 2019
Knut Skogstad
CEO
7. Complaints
Warranty claims will only be valid
if the instructions in the manuals
have been followed.
i
This product is covered by warranty in accordance with
the current terms of sale, provided that the product is
used correctly and properly maintained.
The warranty may be rendered invalid if the system is
used incorrectly or maintenance is grossly neglected.
Complaints resulting from incorrect or defective instal-
lation must be submitted to the installation company
responsible.
Filters are consumables.
Our products are subject to continuous development
and we therefore reserve the right to make changes.
We also disclaim liability for any printing errors that may
occur.
8. Disposal
The symbol on the product shows that this
product must not be treated as household
waste. It must be taken to a collection point for
recycling electrical and electronic equipment.
By ensuring correct disposal of the equipment, you will
help to prevent negative consequences for the environ-
ment and health that incorrect handling may entail.
For further information on recycling this
product, please contact your local authority, your refuse
collection company or the company from which you
purchased it.

18
NORDIC CL3

19
NORDIC CL3

Flexit AS, Televeien 15, 1870 Ørje, Norway
www.flexit.no