Flexit Nordic CL3 User manual

117581-01
2019-09
INSTALLATION
INSTRUCTIONS
Nordic CL3
ART.NO. 800200, 800201
INSTALLATION INSTRUCTIONS
Air handling unit
Flexit
GO

2
NORDIC CL3

3
NORDIC CL3
Contents
1. Planning and preparation work.......................................................................................6
1.1. Joiner/Fitter............................................................................................................................6
1.2. Electrician ..............................................................................................................................6
2. Installation .........................................................................................................................7
2.1. What is included?.................................................................................................................8
2.2. Ceiling mounting..................................................................................................................8
2.2.1. Positioning requirements for ceiling mounting .............................................8
2.2.2. Space requirements for ceiling mounting.......................................................8
2.3. Heavy components .............................................................................................................9
2.3.1. Top mounting.......................................................................................................10
2.3.2. Side mounting ......................................................................................................12
2.4. Wall mounting.....................................................................................................................14
2.4.1. Positioning requirements for wall mounting................................................14
2.4.2. Turning the door..................................................................................................15
2.4.3. Space requirements for wall mounting .........................................................16
2.4.4. Fitting the wall bracket .......................................................................................17
2.5. Floor (loft) mounting .........................................................................................................18
 3RVLWLRQLQJUHTXLUHPHQWVIRUȵRRUPRXQWLQJ ..............................................18
 6SDFHUHTXLUHPHQWVIRUȵRRUPRXQWLQJ........................................................18
3. Duct connection ..............................................................................................................19
3.1. Connection to the unit .....................................................................................................19
4. Electrical work..................................................................................................................20
5. Installing a kitchen fan....................................................................................................21
5.1. Installation of external kitchen fan................................................................................21
5.1.1. Kitchen fan without motor ...............................................................................21
5.1.2. Kitchen fan with motor .....................................................................................21
5.2. Adjusting the kitchen fan .................................................................................................21
5.2.1. Kitchen fan without motor ...............................................................................21
5.2.2. Kitchen fan with motor .....................................................................................21
6. System and general drawings .......................................................................................22
6.1. System drawing (electric heating battery) ...................................................................22
6.2. General drawing.................................................................................................................23
6.3. Nipple location ...................................................................................................................24
7. Technical data, CL3 .........................................................................................................25
8. Dimensioned drawing ....................................................................................................26
9. Capacity and sound data................................................................................................27
9.1. Supply air side ....................................................................................................................27
9.2. Extract air side....................................................................................................................27
9.3. Correction factor for Lw...................................................................................................28
10. Final checks/Starting.......................................................................................................30
10.1. Final checks .........................................................................................................................30
10.2. Startup..................................................................................................................................31
11. Complaints .......................................................................................................................32
12. Waste handling................................................................................................................32
13. CE Declaration of Conformity ........................................................................................32

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. Planning and preparation work
1.1. JOINER/FITTER
$LUȵRZ
Check that the air moves from rooms with supply air
valves to rooms with extract air valves.
Kitchen
ΖIWKHNLWFKHQIDQLVGHVLJQHGZLWKDPRWRUVXɝFLHQW
supply air must be ensured. See chap.5.1. Installation of
external kitchen fan on page 21 and chap.5.2. Adjust-
ing the kitchen fan on page 21 for more information.
Fireplace
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EHbHQVXUHG
Location in the building
Location of the unit on an internal wall requires
insulation of the wall, interrupted studs and boards, and
double plasterboard or a wall structure of similar quality
(see chap.2.4. Wall mounting on page 14).
Positioning must comply with
individual countries’ electrical
safety legislation. Check which
rules apply in your country.
i
Suspension of unit
)RUVFUHZVVXɝFLHQWQRJJLQJVPLQ[PPDUH
required between studs.
See chap.2. Installation on page 7.
Access
The unit must have good access for service/maintenance.
See chap.2.2.1. Positioning requirements for ceiling
mounting on page 8, chap.2.4.1. Positioning require-
ments for wall mounting on page 14 or chap.2.5.2.
6SDFHUHTXLUHPHQWVIRUȵRRUPRXQWLQJRQSDJHIRU
details.
Fire requirements
$Q\ȴUHVDIHW\UHTXLUHPHQWVPXVWEHFODULȴHG
The positioning of heat sources must be coordinated
with extract air
valves so that heat is not sucked straight out through
DbYDOYHRUGRRUJDS
1.2. ELECTRICIAN
Power supply
The units have a 2-metre cable with plug and require a
single-phase earthed socket nearby. Plug requirements:
10 A.
It is important for the plug and electrical connections
to be accessible for servicing when the unit is fully
installed.
!
The unit must be installed
with an earth fault breaker.
:HbUHFRPPHQGDVHSDUDWHFLUFXLW
for the unit.
!
Ensure there is servicing access
to electrical bushings. See the
dimensioned drawing for exact
location.
Internet access:
The unit should be connected to the internet. A conduit
of at least Ø20 mm must be laid between the unit and
the home’s router for the network cable.
For use with a control panel:
Lay a Ø20 mm conduit for running the cable for
controlling the unit between the unit and an easily
accessible place in the home (e.g. outside the bathroom)
DQGWHUPLQDWHZLWKDȵXVKPRXQWHGVLQJOHZDOOER[
Locate the control panel here. The control cable must
be located min. 30 cm away from any power cables.
7KHbFRQWUROFDEOHPXVWEHPD[24 metres long to
ensure a signal.
For use with accessories:
Lay a Ø16 mm conduit between the unit and the
location of the accessory in question (kitchen fan,
pressure relay, etc.).
NB! The PG nipple for the power cable must be
tightened with a torque of 2.0 Nm if the cable is
replaced.

7
NORDIC CL3
!
The installation instructions for the
individual products
must be followed.
For more information on automatic control see
ZZZȵH[LWFRPRUWKHPDQXDOIRU)OH[LW*2DQGWKH
control panel (116081).
Cable type
1 Network cable
Cable for control panel (CI-70)
3-core cable (for e.g. kitchen fan) (D11&D12)
Modbus cable (Modbus)
2 Not in use (accessory)
3 Not in use (accessory)
4 Power cable, unit
For exact positioning of the electrical bushings, see chap.8. Dimen-
sioned drawing on page 26.
Figure 1 Positioning
of bushings
for electrical conductors
F
ig
ure
1
fo
r
el
ec
tr
ic
a
421 3
2. Installation
The unit can be installed in the following ways:
1. On the ceiling.
2. On the wall (mounting is available as an accessory)
3. +RUL]RQWDOO\RQWKHȵRRUDEVRUSWLRQIHHWDUH
available as an accessory)
4. 9HUWLFDOO\RQWKHȵRRUDEVRUSWLRQIHHWDUHDYDLODEOH
as an accessory)
The CL3 is available in both a right and a left version,
depending on what best matches the duct location.
The unit can be located in a cold zone such as the loft.
1
2
3
4
Figure 2 Location options

8
NORDIC CL3
2.1. WHAT IS INCLUDED?
4x 12x
5x
12x
2.2. CEILING MOUNTING
2.2.1. Positioning requirements for ceiling
mounting
The unit is designed to be installed in boiler rooms,
laundry rooms, stores or other suitable areas. The unit
can be in a cold location.
Positioning must comply with
individual countries’
electrical safety legislation. Check
which rules apply in your country.
i
The unit should be positioned in such a way that there is
no danger of noise nuisance in nearby rooms.
• If the unit is located in a warm room where a lot
of moisture is generated, condensation may form
on the outside of the unit during periods when the
outside temperature is low.
The base should be stable and level.
2.2.2. Space requirements for ceiling mounting
The unit must be installed with suitable space for
VHUYLFLQJDQGPDLQWHQDQFHVXFKDVȴOWHUUHSODFHPHQW
and cleaning of fans and recovery system. See Figure 4
Space requirements for ceiling mounting.
These are minimum requirements and only take
service needs into account.
It may be desirable to turn the unit door.
See chap.2.4.2. Turning the door on page 15.
All electrical conductors from the unit must be easily
accessible when the unit is fully installed.
Positioning must comply with
individual countries’ electrical
safety legislation. Check which
rules apply in your country.
i
!
Ensure there is servicing access
to electrical bushings. See the
dimensioned drawing for exact
location.
300mm**
700mm
300mm
300mm
200mm*
300mm**
*space required for access to electrical bushings
** space required if a kitchen fan duct is to be connected
Figure 4 Space requirements for ceiling mounting
Figure 3 What is included?

9
NORDIC CL3
kg
2.3. HEAVY COMPONENTS
We recommend using a lift/manual lifting table for ceiling
mounting. We also recommend wearing a hard hat.
!
Be aware that some of the unit’s
components are heavy.

10
NORDIC CL3
2.3.1. Top mounting
If it is necessary to pre-drill the mounting surface, see
Figure 5 Holes, top mounting for dimensions.
6HOHFWȴ[LQJVWKDWDUHVXLWDEOHIRUWKHPRXQWLQJVXUIDFH
!
The fixings must be suitable for the
unit’s weight of 59 kg.
1114mm
643mm
28mm
23mm
Figure 5 Holes, top mounting
40 mm
40 mm
Ø8 mm

11
NORDIC CL3
!
The unit must always be mounted
with at least a 3 mm gap to the
mounting surface to prevent
structure-borne sound.
3 mm
Figure 7 Gap to mounting surface
Using suitable screws, screw through the holes in the
mounting bracket, damping block and the unit’s back
panel.
Figure 6 Mounting bracket, top mounting
Figure 8 Top mounting

12
NORDIC CL3
2.3.2. Side mounting
If it is necessary to pre-drill the mounting surface, see
Figure 9 Holes, side mounting for dimensions.
6HOHFWȴ[LQJVWKDWDUHVXLWDEOHIRUWKHPRXQWLQJVXUIDFH
!
The fixings must be suitable for the
unit’s weight of 59 kg.
1115 mm
721 mm
42 mm
8 mm
14 mm
18,5 mm
Ø5 mm
Figure 9 Holes, side mounting

13
NORDIC CL3
8VHVXLWDEOHVFUHZVDQGVFUHZWKHXQLWȴUPO\LQWRVSDFH
by securing the mounting brackets.
Figure 10 Side mounting
!
Make sure that the mounting
surface only touches the mounting
brackets and not the unit so as to
prevent structure-borne sound.
The mounting bracket can be adjusted sideways in both
GLUHFWLRQVWRSUHYHQWWRXFKLQJZLWKWKHXQLWVHHȴJ
Figure 11

14
NORDIC CL3
BOILER ROOM
LIVING ROOM
WALL
2.4. WALL MOUNTING
2.4.1. Positioning requirements for wall mounting
The unit is designed to be installed in boiler rooms,
laundry rooms, stores or other suitable areas. The unit
can be in a cold location.
Positioning must comply with
individual countries’ electrical
safety legislation. Check which
rules apply in your country.
i
The unit should be positioned in such a way that there is
no danger of noise nuisance in nearby rooms.
• If the unit is located on an internal wall, the wall
should be soundproofed with, for example, rock
wool to reduce sound transmission. Double plaster-
board on the wall, interrupted studs and interrupted
plasterboard are recommended.
See Figure 12 Recommended wall construction.
• If the unit is located in a warm room where a lot
of moisture is generated, condensation may form
on the outside of the unit during periods when the
outside temperature is low.
The base should be stable and level.
Figure 12 Recommended wall construction
ȵRRUSODQ
BOILER ROOM
LIVING ROOM
suitable
insulation
WALL
The back panel of the unit has screw holes for attach-
ment to the wall (accessories), both at the top and the
bottom, so the unit can be mounted either way on the
wall.
In that connection it may be desirable to turn the unit
door. See chap.2.4.2. Turning the door on page 15.

15
NORDIC CL3
4
2
1
3
2.4.2. Turning the door
The hinge brackets must be moved for the door to be
turned.
1. Undo the screws in the hinge brackets.
2. Then move the hinge brackets and do up the screws
again.
3. Slide both locking bolts in towards the centre of the
door while
4. ȴWWLQJWKHGRRULQSODFH

16
NORDIC CL3
300mm
300mm
700mm
min. 90°
2.4.3. Space requirements for wall mounting
The unit must be installed with space for servicing and
PDLQWHQDQFHVXFKDVȴOWHUUHSODFHPHQWDQGFOHDQLQJRI
the fans and rotor. See Figure 13 Space requirements
for ceiling mounting.
These are minimum requirements and only take
service needs into account.
All electrical conductors from the unit must be easily
accessible when the unit is fully installed.
Positioning must comply with
individual countries’ electrical
safety legislation. Check which
rules apply in your country.
i
!
Ensure there is servicing access
to electrical bushings. See the
dimensioned drawing for exact
location.
200 mm*
min. 90°
200*-300**mm
*space required for access to electrical bushings
** space required if a kitchen fan duct is to be connected
Figure 13 Space requirements for ceiling mounting
Figure 14 Space requirements for wall mounting

17
NORDIC CL3
2.4.4. Fitting the wall bracket
In the case of wall mounting, secure the wall bracket to
the wall and hang the unit in place (see Figure 15 Fitting
the wall bracket). Hold the unit at an angle when hooking
it onto the wall.
The top edge of the wall bracket should be mounted
55 mm higher than the top of the unit’s back panel. If,
for example, the top of the unit is to be 400 mm below
the ceiling, the wall bracket should be mounted 345 mm
from the ceiling, measured from the ceiling to the top
edge of the wall bracket (Figure 16 Wall bracket).
CEILING
Figure 15 Fitting the wall bracket
The wall bracket is an accessory
and does not come with the unit.
See separate instructions (117784)
for fitting the wall bracket.
i
Figure 16 Wall bracket

18
NORDIC CL3
2.5. FLOOR (LOFT) MOUNTING
2.5.1. 3RVLWLRQLQJUHTXLUHPHQWVIRUȵRRU
mounting
The unit is designed to be installed in boiler rooms,
laundry rooms, stores or other suitable areas. The unit
can be in a cold location.
Positioning must comply with
individual countries’ electrical
safety legislation. Check which
rules apply in your country.
i
The unit should be positioned in such a way that there is
no danger of noise nuisance in nearby rooms.
When installing on the ceiling, absorption feet should be
XVHGIRUWKHVDNHRIQRLVHDQGYLEUDWLRQV)OH[LWR΍HUV
suitable absorption feet as accessories, see Figure 17
Absorption feet (accessory).
• If the unit is located in a warm room where a lot
of moisture is generated, condensation may form
on the outside of the unit during periods when the
outside temperature is low.
The base should be stable and level.
Figure 17 Absorption feet (accessory)
2.5.2. 6SDFHUHTXLUHPHQWVIRUȵRRUPRXQWLQJ
The unit must be installed with suitable space for
VHUYLFLQJDQGPDLQWHQDQFHVXFKDVȴOWHUUHSODFHPHQW
and cleaning of fans and recovery system. See Figure 18
6SDFHUHTXLUHPHQWVIRUȵRRUPRXQWLQJ
These are minimum requirements and only take
service needs into account.
It may be desirable to turn the unit door. See chap.2.4.2.
Turning the door on page 15.
All electrical conductors from the unit must be easily
accessible when the unit is fully installed.
Positioning must comply with
individual countries’ electrical
safety legislation. Check which
rules apply in your country.
i
!
Ensure there is servicing access
to electrical bushings. See the
dimensioned drawing for exact
location.
700mm
200mm*
300mm
300mm
300mm**
*space required for access to electrical bushings
** space required if a kitchen fan duct is to be connected
)LJXUH6SDFHUHTXLUHPHQWVIRUȵRRUPRXQWLQJ
The absorption feet are an
accessory and do not come with
the unit.
i

19
NORDIC CL3
3. Duct connection
3.1. CONNECTION TO THE UNIT
See Figure 19 Duct connection.
(QVXUHWKDWWKHGXFWVDUHȴWWHGWRWKHFRUUHFWQLSSOH
- see the markings on top of the unit and chap.6. System
and general drawings on page 22.
Pull the duct insulation well up to the unit.
To prevent condensation, it is particularly important for
the outdoor and exhaust air ducts to have insulation and
a plastic sleeve pulled right down to the unit.
Seal the plastic sleeve to the unit with ties.
All ducts that pass through a cold zone must be
insulated.The ducts normally require min. 50 mm
LQVXODWLRQZLWKDQHɝFLHQF\FRUUHVSRQGLQJWRȜ 
:Pr&RUEHWWHU7KHȴWWHULVUHVSRQVLEOHIRUWKH
required insulation and vapour-proof sleeves being used
in accordance with location/temperature.
Lay the outdoor air duct with a slight incline towards the
outdoor air cap so that any water that enters drains out
again.
Silencers should be installed on the main trunk to
reduce fan noise to the rest of the duct system.
Guide the duct insulation
with plastic jacket right
down to the polystyrene
around the nipple. It is very
important that there are
no gaps between the duct
insulation and the polysty-
rene, as this could lead to
condensation and/or icing.
Pull the duct well over the
seal on the nipple.
Pull the plastic sleeve right
down to the unit.
Fasten the sleeve with ties.
Figure 19 Duct connection Figure 20 Fitted duct.

20
NORDIC CL3
4. Electrical work
!
The unit must be installed
with an earth fault breaker.
:HbUHFRPPHQGDVHSDUDWHFLUFXLW
for the unit.
The unit is supplied with a 2 m cable with plug.
The cable exits at the top of the unit and is connected
to a 230 V 50 Hz single-phase earthed power point
that is placed in an easily accessible position close by.
7KHbSRZHUSOXJVKRXOGEHXVHGDVWKHVHUYLFHVZLWFK
See chap.7. Technical data, CL3 on page 25 for fuse
sizes.
Positioning must comply with
individual countries’ electrical
safety legislation. Check which
rules apply in your country.
i
!
Ensure that the plug for
the unit is not boxed in.
Internet access:
The unit should be connected to the internet. Lay a
network cable between the unit and the home’s router,
and connect.
Accessories:
Wireless accessories
A wireless adaptor can be connected to the 4-pole
FRQWDFWPDUNHG02'%86)RUFRQȴJXUDWLRQZLWKWKH
Flexit GO app, see the instructions that come with the
accessories.
Other accessories
Accessories with a closing contact can be connected to a
3-core cable on top of the unit.
Marking Colour Function Description
DI1 Brown HIGH (default) )RUFHGDLUȵRZUDWH
DI2 Green COOKER (default) Forced air supply
+24 V (REF) White Reference
7KHLQSXWVFDQEHFRQȴJXUHGIRURWKHUIXQFWLRQVZLWK
the Flexit GO app, see manual (117078).
Control panel:
A control panel can be connected to the 2-pole contact
marked CI 70. For more information, see the instructions
for the control panel (116081).
!
Signal cables must be at least 30
cm from power cables and should
be laid in a 20 mm wiring conduit
at installation. The cables must not
be more than 24 m long.