Flexit K2.1 User manual

INSTALLATION INSTRUCTIONS
Air handling unit with kitchen hood and control automation
ART.NO. 700114, 700116, 700118, 700119, 700122, 700123, 700124, 700126
111140EN-14
2019-10
Flexit K2.1
INSTALLATION
INSTRUCTIONS

2
K2.1

3
K2.1
Contents
1. Preliminaries.................................................................................................................6
1.1. Inspection/Maintenance ..............................................................................................6
1.2. Space required............................................................................................................... 6
1.3. Location requirements................................................................................................. 6
1.4. Recommended sound attenuation for wall-mounting......................................... 7
2. Installation ....................................................................................................................8
2.1. Installing the volume hood..........................................................................................8
2.2. Encasing ........................................................................................................................... 9
3. Connection of unit and electrical work................................................................... 10
3.1. Connection of unit.......................................................................................................10
3.2. Electrical work...............................................................................................................10
3.3. Automatic control........................................................................................................10
3.4. External components .................................................................................................10
4. System and general drawings ................................................................................. 11
4.1. System drawing (electric heating battery) .............................................................11
4.2. General drawing...........................................................................................................11
4.3. Nipple location .............................................................................................................12
5. Technical data............................................................................................................ 13
6. Dimensioned drawings............................................................................................. 14
7. Capacity and sound data.......................................................................................... 15
7.1. Supply air side ..............................................................................................................15
7.2. Extract air side..............................................................................................................15
7.3. Correction factor for Lw.............................................................................................16
8. Installation of control panel CI 60/600 ................................................................... 17
8.1. Content...........................................................................................................................17
8.2. Installation of CI60/600 ..............................................................................................18
8.3. Concealed installation ................................................................................................19
8.4. Surface installation......................................................................................................19
 )LQLVKLQJR΍Ȃ&Ζ ......................................................................................................19
 )LQLVKLQJR΍Ȃ&Ζ....................................................................................................19
9. Adjusting units........................................................................................................... 20
9.1. Adjustment with CI60 .................................................................................................20
9.1.1. Adjustment........................................................................................................20
9.1.2. Adjusting the temperature............................................................................20
9.2. Adjustment with CI600 ..............................................................................................21
9.2.1. Adjustment .......................................................................................................21
9.2.2. Temperature regulation.................................................................................21
10. Adjusting the kitchen hood...................................................................................... 22
10.1. Forced ventilation........................................................................................................22
11. Adjustment curves .................................................................................................... 23
11.1. Forced ventilation Flexit K2.1....................................................................................23
12. Final checks................................................................................................................ 24
13. First use ...................................................................................................................... 24
14. Complaints .................................................................................................................25
15. Waste handling.......................................................................................................... 25
16. CE Declaration of conformity................................................................................... 26

4
K2.1
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
Outdoor air
Supply air
Exhaust air
DANGER:
ELECTRICITY
EXAMPLE OF NIPPLE LOCATIONS
(shown as a right-hand model)
EXAMPLE OF NIPPLE LOCATIONS
(shown as left-hand model)
FRONT FRONT
Extract air
from kitchen
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
K2.1
!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
K2.1
1. Preliminaries
See separate documentation for installation of ducts,
valves, etc.
INFO! The unit is designed for
indoor installation.
i
1.1. INSPECTION/MAINTENANCE
The unit must be installed with space for service and
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fans and recovery system.
The control cable with plug for automatic control on top
of the unit must be easily accessible.
1.2. SPACE REQUIRED
Type A B C
K2.1 335 mm 2 x 2 m 215-380 mm
A: Space in front of unit
B: Space at side of unit
C: Space above unit
These are minimum requirements and only take service
needs into account. National statutory requirements for
electrical safety may deviate from this. Check which rules
apply in your country.
1.3. LOCATION REQUIREMENTS
The unit has been designed for location in the kitchen
over the cooker as it contains an integrated kitchen
hood. The unit is available in left or right versions
(exhaust air nipple to the left or right), depending on
what is the most favourable in relation to the duct
location.
596mm
B=2mm B=2mm
ȴOWHU
C=215-380mm
A=335mm
Filter
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RSWLRQDOH[WUD
70mm
YROXPHKRRG
700mm
XQLW
845mm
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7
K2.1
1.4. RECOMMENDED SOUND ATTENUATION FOR WALL-MOUNTING
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the unit is used.
The unit must not be placed on a wall with rooms on the
other side which are sensitive to noise. The wall must be
sound-insulated. If necessary, use double plasterboards
on the wall.
Interrupted studs must be used.

8
K2.1
2. Installation
Flexit K2.1 is designed for installation in the kitchen
above cookers with 3-4 hotplates, see Fig. 2. The unit is
supplied in left and right-hand versions depending on
what suits duct locations best (see cahp. ”4.3. Nipple
location” at page 12).
The unit must be wall-hung from a mounting bracket
(Fig. 2) at the top using the enclosed screws. It must also
be screwed to the wall at the bottom edge of the unit.
Remove 2 plastic plugs to access the mounting holes.
For secure mounting, it is necessary to use extra nailing
strips (noggins). The location of these is shown in Fig. 3.
NB! The wall must have good sound insulation, see
chap. ”1.4. Recommended sound attenuation for wall-
mounting” at page 7.
7KHZDOOPXVWEHFRPSOHWHO\ȵDWEHKLQGWKHYHQWLODWLRQ
unit. If the kitchen hood area is tiled, a suitable liner
plate must be mounted behind the unit. The distance
EHWZHHQWKHERWWRPRIWKHJUHDVHȴOWHUDQGWKHFRRNHU
should be at least 50 cm for electric cookers and 65 cm
for gas cookers. For the external dimensions of the unit,
see the dimensioned drawing in chap. ”6. Dimensioned
drawings” at page 14.
A
1
2
3
3
1
2
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1. Mount the two sides.
2. Attach the two angles.
)L[WKHJODVVSURȴOH
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40 mm
720 mm
spikerslag
gips
steinull
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ȴ[LQJ
ORZHU
HGJH
2.1. INSTALLING THE VOLUME HOOD
)LJ min 600 mm
min 500(650) mm
5HFRPPHQGHG
500mm*
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VWXGV
URFNZRRO
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9
K2.1
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596 mm
B=2mm B=2mm
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2.2. ENCASING
The casing must not be deeper than dimension A.
A

10
K2.1
3. Connection of unit and electrical work
A low-voltage cable (with connector) leaves the unit
for use on the control panel. It is important to retain
easy access to this plug - in case of any fault or when
replacing the unit.
3.3. AUTOMATIC CONTROL
The control pack is included in the unit package.
The low-voltage cable must be laid between the unit
and the switch unit. See separate manual for automatic
control included in pack.
!
NOTICE! The low-voltage cable
must be laid minimum 30 cm from
the 230 V cable and in the case of
chased mounting be laid in 20 mm
electrical piping. The cable length
must not exceed 24 meters.
3.4. EXTERNAL COMPONENTS
See wiring diagram enclosed with unit.
3.1. CONNECTION OF UNIT
• (QVXUHWKDWWKHGXFWVDUULYHDWWKHULJKWPX΍FRXSOLQJ
See the marking on the unit (top/bottom and
behind door). The symbols are explained on page
4 and the location is shown in chap. ”1.3. Location
requirements” at page 6.
• Pull the duct insulation well up to the unit.
• To avoid condensation, it is very important for the
outdoor air duct and the exhaust air duct to have
LQVXODWLRQDQGDSODVWLFPX΍SXOOHGULJKWGRZQWRWKH
unit.
NB! Use tape to seal the plastic sleeve to the unit but
do not compress the insulation.
• Lay the outdoor air duct with a slight incline towards
the outdoor air cap so that any water that enters
drains out again.
• If there is a short distance between the unit and the
exhaust point, sound insulation must be installed to
ensure that the requirements for the outdoor sound
level are met.
• Ducts must have good sound insulation, particularly
above the unit.
3.2. ELECTRICAL WORK
DANGER! All electrical work must
be carried out by authorised
personnel.
i
DANGER! The unit must be
installed with a separate earth
leakage circuit breaker.
i
The unit is suppied with a 1.8 m cable with plug.
The cable leaves the top of the unit and is connected to
a 230V 50 Hz single-phase earthed power point located
within a convenient distance. The plug must be used as a
service switch.
NB! Make sure the power point for the unit is not boxed
in.
See chap. ”5. Technical data” at page 13 for fuse sizes.

11
K2.1
4. System and general drawings
4.1. SYSTEM DRAWING (ELECTRIC HEATING BATTERY)
FI1 FI2
B1
EB FI0
F20
M4HR-R
M1 M2
K
DA4
Outdoor air Supply air Extract air Exhaust air
4.2. GENERAL DRAWING
Exhaust Extract Supply Outdoor
air air air air
5
1
7
4
8
9
6
2
10
11
3
(6KRZQDVULJKWKDQGPRGHO7KHOHIWKDQGPRGHOLVLQYHUWHG
Abbreviation Description
B1 Supply air temperature sensor
EB Heating battery
F10 Overheating thermostat, manual reset
F20 Overheating thermostat, automatic reset
FI1 6XSSO\DLUȴOWHU
FI2 ([WUDFWDLUȴOWHU
M1 Supply air fan
M2 Extract air fan
HR-R Rotary wheel-type heat exchanger
M4 Rotor motor
K Kitchen hood connection
DA4 Damper
No. Abbreviation Description
1 FI2 ([WUDFWDLUȴOWHU
2 FI1 6XSSO\DLUȴOWHU
3 EB Heating battery
4 F10 Overheating thermostat, manual reset
4 F20 Overheating thermostat, automatic
reset
5 M1 Supply air fan
6 M2 Extract air fan
7 HR-R Rotary wheel-type heat exchanger
8 M4 Rotor motor
9 Control unit
10 Kitchen hood
11 Damper adjustment

12
K2.1
(6KRZQDVDULJKWKDQGPRGHO(6KRZQDVDOHIWKDQGPRGHO
514
227
371
84
129
229
514
227
371
84
129
229
4.3. NIPPLE LOCATION

13
K2.1
5. Technical data
EC 700 W
Rated voltage (AC 50Hz) 230 V
Frequency 50 Hz
Fuse size 10 A
Rated current 3,8 A
Rated power, total 875 W
Rated power, max. electric battery 700 W
Rated power, fans 173 W
Rated power, rotor motor 2 W
Fan type B-wheel
Fan motor control 0-10 V
Max. fan speed RPM 3 690 (3 200)
Automatic control, standard CS 60
Protection rating IP21
Filter class ePM1 55% (F7)
Filter type (supply air/extract air) &RPSDFWȴOWHU
Filter dimensions (WxHxD) 130 x 335 x 50 mm
Weight 57 kg
Duct connection Ø 125 mm (sleeve)
Height 700 mm*
Width 598 mm
Depth 510 mm**
Colour White/Stainless steel
RAL 9016
Gloss 25-35
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VHHFKDS'LPHQVLRQHGGUDZLQJV
Energy class:
CTRL 0.65
LOCAL DEMAND CONTROL
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Accessories: Advanced panel + CO2sensor/motion
sensor + damper
Result: ΖQFUHDVHGDLUȵRZUDWHLQ]RQHVWKDWQHHGLW
ZZZȵH[LWFRP
A

14
K2.1
6. Dimensioned drawings
Dimensions in mm

15
K2.1
7. Capacity and sound data
SS \
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$LUȵRZUDWH[m³/h]
9060
30
100%
80%
40%
60dB(A) 65dB(A)55dB(A)50dB(A)
100%
80%
60%
40%
6)3<
0 100 200 300 400
60%
60
100
dB(A)
80
0
200
400
600
800
0
40
20
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$LUȵRZUDWH[m³/h]
100%
80%
40%
55dB(A) 60dB(A)50dB(A)45dB(A)
100%
80%
60%
40%
6)3<
9060
30
0 100 200 300
60%
60
80
100
0
200
400
600
800
0
40
20
400
7.1. SUPPLY AIR SIDE
7.2. EXTRACT AIR SIDE

16
K2.1
Hz 63
Lw(dB)
125
Lw(dB)
250
Lw(dB)
500
Lw(dB)
1000
Lw(dB)
2000
Lw(dB)
4000
Lw(dB)
8000
Lw(dB)
LwA
(dBA)
Supply air 884-2 -13 -12 -23 -30
Extract air 10 10 5 -8 -15 -16 -28 -32
Radiated 1 -12 -7 -8 -19 -30 -29 -33 -32 -15
Radiated 2 -5 -6 -13 -24 -32 -29 -39 -33 -17
Explanation of diagram:
6RXQGGDWDLVVSHFLȴHGDVVRXQGSRZHUOHYHO/Z$LQWKH
capacity diagrams. (This is sound to duct.)
These values can be corrected by means of the table for
WKHGL΍HUHQWRFWDYHEDQGVLQRUGHUWRORRNDW/ZZLWKRXW
adaptation to A band).
The correction table for the various octaves is stated in
Lw, which means that the Lw values are after conversion
of each octave for supply air and extract air.
Radiated sound from the unit must be calculated from
the supply air diagram.
Radiated 1: K2 free hanging
Radiated 2: K2 built-in kitchen
:RUNLQJSRLQWPKDJDLQVW3D
7.3. CORRECTION FACTOR FOR LW
Data for supply air is measured in accordance with
Ζ62bWKHȊΖQGXFWPHWKRGȋ
Radiated noise is measured in accordance with ISO
9614-2. Bruel & Kjær measuring equipment, type 2260.
> EXAMPLE 3
Radiated sound in total from
the unit in LwA
At the bottom right of the table, a total
value for radiated sound from the unit
is stated in LwA. This is an aggregate
value.
The values for the radiated sound
IRUWKHGL΍HUHQWRFWDYHVKDYHEHHQ
totalled up and then corrected for
$bEDQG
This is used as follows:
The LwA value is read from the supply
air capacity diagram, in our example
60 dBA, and this is then subtracted
from the total value (this is also an
LwA value).
LwA 60 dBA - 15 dBA = 45 dBA, (which
is then stated in LwA, the sound
power level adapted to the ear’s A
band).
> EXAMPLE 2
Radiated sound in Lw per octave
If a reading of 60 dBA at the working
point is taken from the supply air
capacity diagram (which indicates
sound to duct) in order to arrive at a
subsequent Lw value for the various
octaves, a deduction is then made
from the value for the relevant octave
for the row with radiated sound.
60 dBA - 19 (for 500Hz) = 41 dB, which
is an Lw value and indicates the
radiated sound from the unit in this
octave.
> EXAMPLE 1
Sound to duct in the various
octaves is stated in Lw
The working point gives 60 dBA from
the capacity diagram for supply
air. I am interested in what this is
VSHFLȴFDOO\LQWKH+]UDQJH
60 dBA - 4 = 56 dB which is an Lw
value (sound power level without
adaptation to the ear’s A band)

17
K2.1
8. Installation of control panel CI 60/600
8.1. CONTENT
1
2
3
4
5
1. Control panel
2. Back piece for concealed installation
3. Back piece for surface installation
4. Installation instructions
5. Cable for control panel

18
K2.1
ON OFF
)LJ
&RQȴJXUDWLRQ Setting
CI 600 (MASTER) Automatic
CI 60 1 (SLAVE) OFF
CI 60 2 (SLAVE) ON
CI 60 1 (MASTER) OFF
CI 60 2 (SLAVE) ON
CI 600 (MASTER) Automatic
CI 60 (SLAVE) Irrelevant
8.2. INSTALLATION OF CI60/600
CAUTION! The control panel must
be connected to the ventilation
unit before the ventilation unit is
connected to mains.
i
Lay the cable for the control panel between the
ventilation unit and the control panel. The control
panel is adapted for concealed installation over a single
connection box (use low back piece, item no. 2) or
surface installation on the wall (use high back piece, item
no. 3).
INFO! Click the cable into the
contact at the back of the control
panel and into the contact on the
top of the ventilation unit.
i
!
NOTICE! The low-voltage cable
must be at least 30 cm from cables
carrying mains voltage or higher.
With concealed installation, the
cable is laid in 20 mm conduit
pipes. The cable length must not
exceed 24 meters.
It is possible to connect two CI60 panels and one CI600
panel to each unit. If several CI60 panels are used, each
panel must have its own identity. This is selected with
the switch on the panel’s printed circuit board (se Fig. 7).
Use the appropriate table settings. The panels can be
connected serially, in arbitrary order.
OFF = MASTER
ON = SLAVE

19
K2.1
8.3. CONCEALED INSTALLATION
Lay the cable between the wall box and the ventilation
unit in the preinstalled conduit pipe. Fit the back piece
(item no. 2), over the wall box and click the cable in
directly from behind as in the illustration (se Fig. 8).
)LJ
J
8.4. SURFACE INSTALLATION
Lay the cable between the back piece (item no. 3), and
the ventilation unit. Cut out the perforation in the corner
of the back piece that is suitable for installation. Screw
the back piece to the wall with suitable screws. Click the
cable into the control panel from below, where there is a
socket in the printed circuit board (se Fig. 9).
)LJ
J
8.5. FINISHING OFF – CI60
6OLGHWKHSDQHOR΍DVVKRZQE\DUURZQRVHH)LJ
DQGȴWWKHFRQWUROSDQHOVWUDLJKWLQWRWKHEDFNSLHFH
as shown by arrow no. 2 (see Fig. 11) until it clicks into
place. Slide the panel back on.
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

1
J
2
8.6. FINISHING OFF – CI600
Fit the control panel over the hooks in the back piece as
shown by arrow no. 1 and then click the panel into place
at the bottom edge as shown by arrow no. 2 (see Fig.
12).
)LJ
1
2

20
K2.1
9. Adjusting units
9.1. ADJUSTMENT WITH CI60
CAUTION! The unit's air supply
MUST be adjusted before the
unit is used for the first time. This
should be done in accordance with
the projection documents. Adjust
the values based on the projected
values.
i
9.1.1. Adjustment
Only stage 2 (NORMAL) needs to be adjusted. Stages
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adjusted as required in the individual home.
7KHIXQFWLRQRIWKHGL΍HUHQWVWDJHV
MIN
Must not be used when the home is in use.
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seasons.
NORMAL
Used under normal conditions. On this setting
the air supply must be adjusted according to
current regulations.
MAX
Used if there is a need for increased air supply
on account of higher occupancy or a raised
humidity level, for example during showering
or when clothes are being dried. This setting is
normally used for limited periods.
The ventilation unit’s air supply is adjusted in speed level
NORMAL using the knobs on the back of the cover. Knob
9 is used for supply air level and knob 8 for extract air
level (see Fig. 13). The adjustment range is 20-100% of
the maximum level according to the scale on the knob.
Factory settings for supply air/extract air:
MIN ȴ[HG
NORMAL 75% (variable)
MAX ȴ[HG
9.1.2. Adjusting the temperature
The temperature required for the supply air can be
set with knob 11. The adjustment range is 10 - 30°C.
It should normally be set to around 18°C. Use of the
factory setting is recommended.
If necessary, the ventilation unit’s additional heating can
also be switched ON/OFF with switch 10. In this case
only the rotating heat exchanger is used as a source of
heat. It is best to leave it in ON position, as the unit will
then respond automatically when there is a need for
additional heating.
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8
9
10 11