Vallox 51 MV User manual

MV
Manual
Model
Vallox 51 MV
Vallox 51K MV
Type
A3750
A3751
Document
D7597
Valid from
15.10.2021
Updated
20.12.2021
Ventilation units
MANUAL

2
MV
INTRODUCTION............................... . . 2
Safety ...................................................... . 3
Installation ............................................. . . . . 3
Warranty.................................................... . 3
Intended use ................................................ . 3
Disposal of the ventilation unit ................................ . 3
Safety signs used in the instructions .......................... . 4
Installation options........................................... . 4
System description .......................................... . 4
Ventilation unit control ....................................... . 5
Ventilation unit control options. ............................... . 5
Changing the ventilation mode........................... . . . . 5
Vallox 51 MV ........................................... . . . . 5
Vallox 51K MV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Connecting the ventilation unit to the cloud service ........ . . . . 7
Brightness of the light................................... . . . . 7
Guard function ......................................... . . . . 7
Main parts .................................................. . 8
Vallox 51 MV ........................................... . . . . 8
Main parts .................................................. . 9
Vallox 51K MV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
INSTALLATION.................................. 10
Mounting on the wall ......................................... 10
Mounting on the ceiling ...................................... 10
Mounting the ceiling mounting plate...................... . . . 10
Installing the ventilation unit to the ceiling mounting plate . . . . . . 11
Attic floor penetration plate.............................. . . . . 11
External electrical connections................................ 12
Removal of condensing water ................................. 12
Vallox 51 MV ........................................... . . . 12
Vallox 51K MV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Installation of the Vallox Captura Cooker hood ................. 14
Measuring and adjusting the air flows of the ventilation unit ...... 15
Measuring and adjusting the air flows of the cooker hood ........ 15
Standard ventilation .................................... . . . 15
Adjustment: ............................................ . . . 15
Vallox 51 MV, 51K MV ........................................ 17
Dimensions and duct outlets.................................. .17
MAINTENANCE ................................ 18
Vallox 51 MV, 51K MV ........................................ 18
Before beginning maintenance work........................... 18
Replacing the filters .......................................... 18
Cleaning the heat recovery cell ............................... 19
Condensing water ........................................... 19
Cleaning the fans ........................................... 20
Removing and cleaning the fans ......................... . . . 20
Vallox 51K MV ............................................... 21
Cleaning the grease filter of the cooker hood ................... 21
Removing and mounting the grease filter.................. . . . 21
Light .................................................. . . . 21
NOTE
You can register your
Vallox MV ventilation
unit with the MyVallox
Cloud service and sign
in into your MyVallox
Cloud account at
www.myvallox.com.
CONTENTS
INTRODUCTION
TECHNICAL SPECIFICATIONS ... 22
Air flows and sound values................................... 23
Internal electrical connection ................................ 24
Vallox 51 MV / Vallox 51K MV ............................. . . .24
External electrical connection................................ 25
Vallox Captura Cooker hood ............................. . . .25
External electrical connection................................ 26
Vallox 51 MV ........................................... . . .26
External electrical connection................................ 27
Vallox 51K MV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
External electrical connection for controlling the MLV duct radiator . 28
Duct radiator operation...................................... 29
Duct radiator operation chart ................................ 30
In the outdoor air duct .................................. . . .30
In the supply air duct.................................... . . .30
Exploded view and parts list .................................. 31
Vallox 51 MV ........................................... . . . 31
Vallox 51K MV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Conformity certificates ...................................... 33

3© Vallox Oy - All rights reserved
MV
SAFETY
Safe and appropriate handling requires knowledge of the basic
safety regulations, and of the intended use of the ventilation system.
Read this manual before operating the ventilation unit. Please keep
the manual for later reference. If you lose the manual, it can be
downloaded from our website.
This user manual contains all the information necessary for safe
operation of the system. All persons who operate and maintain
the ventilation system must follow the instructions provided in this
manual. Furthermore, all local accident prevention regulations must be
observed.
Installation
Installation and setup should only be carried out by a qualified
specialist. Electrical installations and connections must only be carried
out by an electrician and in compliance with local regulations.
WARRANTY
The guarantee and liability exclude damage resulting from:
• Inappropriate use of the ventilation system or the control unit
• Incorrect or inappropriate installation, setup or use
• Neglect of instructions concerning transportation, installation, use,
or maintenance
• Structural or electronic modifications or changes made to the
software
INTENDED USE
All Vallox ventilation units have been designed to provide appropriate
and continuous ventilation so as to present no threat to health and to
maintain structures in good condition.
DISPOSAL OF THE VENTILATION UNIT
Do not dispose of electronic devices with household waste. Follow
local laws and regulations on safe and ecological disposal of the
product.
NOTE
For further information,
go to www.vallox.com
INTRODUCTION
WARNING
The unit is not intended
for use by children
under 8 or by persons
with reduced sensory,
physical or mental
capabilities, or whose
lack of knowledge
and experience do not
ensure safe operation
of the unit.
Such persons can
use the unit under
supervision, or
by following the
instructions of someone
who is responsible for
their safety.
Children must be
supervised and not be
allowed to play with the
device.

4
MV
SAFETY SIGNS USED IN THE INSTRUCTIONS
INSTALLATION OPTIONS
• Vallox 51 MV and 51K MV can only be mounted on the wall.
There are two unit models, left- (L) and right-handed (R). In the
right-handed version, outdoor air comes into the unit from the
right. In the left-handed version, outdoor air comes into the unit
from the left. The location of the filters, bypass damper, and
heating radiator is also mirrored in the left-handed model.
NOTE
The standard
equipment and
available accessories
vary from country to
country.
DANGER
Indicates a hazard that
will result in death or
serious injury if not
avoided.
WARNING
Indicates a hazard that
can result in death or
serious injury if not
avoided.
IMPORTANT
Indicates a hazard that
can result in damage to
property or loss of data
if not avoided.
CAUTION
Indicates a hazard that
can result in minor or
moderate injury if not
avoided.
NOTE
Indicates essential
information about the
product.
TIP
Provides additional
information about the
use of the product and
its benefits.
INTRODUCTION
SYSTEM DESCRIPTION
1. Internet
2. WLAN
3. Router
4. WLAN/LAN
5. Additional switch
6. Sensors MyVallox Cloud
MyVallox Home
Vallox MV
MyVallox Control
Modbus
1
KNX
KNX
-muunnin
23
4
5
6

5© Vallox Oy - All rights reserved
MV
INTRODUCTION
IMPORTANT
Apartment-specific
ventilation units allows
residents to adjust the
ventilation eciency.
Ventilation is controlled
based on the need e.g.
through the cooker
hood, ventilation
control panel, or a
separate control centre.
In order to ensure that
the indoor air presents
no harm to health and
remains optimal also
for the structures of the
building, ventilation
must be kept on
without disruptions.
It is recommended
that ventilation be
left turned on during
long holidays also.
This keeps the
indoor air fresh and
prevents humidity
from condensing in
the ventilation ducts
and structures. It also
reduces the risk of
moisture damage.
VENTILATION UNIT CONTROL
Ventilation unit control options
Operation of the Vallox ventilation unit can be controlled by the
following means:
• Through the My Vallox Control panel installed in the
building.
• Through the MyVallox Home local area network connection
and the MyVallox Home/Cloud user interface.
• Through the MyVallox Cloud service and the MyVallox
Home/Cloud user interface.
• Through a remote monitoring service or building automation
that uses voltage signals or Modbus messages.
In addition to the integrated humidity and carbon dioxide
sensor, ventilation can also be adjusted automatically by using
the optional carbon dioxide, humidity, or VOC (air quality)
sensor. When these are used, ventilation remains optimal even
when the dwelling is unoccupied. Each user can use the week
clock to adjust the ventilation to fit their individual lifestyle.
IMPORTANT
Prolonged overpressure
can result in damage
to the structures of the
building.
At home
Use this mode when the dwelling is occupied.
Away
Use this ventilation mode when the apartment is
unoccupied, e.g. during a trip or other long absence.
Fireplace mode
Use this mode when, for example, you are making
a fire in the fireplace. The mode is primarily used to
create momentary overpressure in the dwelling.
Boost
Use this mode to increase the ventilation rate,
e.g. when there are more people than usual in the
dwelling or elsewhere on the premises.
Changing the ventilation mode
Vallox 51 MV
The Vallox 51 MV ventilation unit is controlled by using the
MyVallox Control control panel. Press the left button of the
control panel (see the Figure) repeatedly until the desired status
is shown as the middle option on the display.
MyVallox Control panel

6
MV
INTRODUCTION
Cooker hood light
Turn the light on or o by pressing the light switch. The
brightness of the light can be adjusted. See page 7.
Ventilation modes
Select the mode by pressing the fan speed button
repeatedly until the signal light indicates the desired
ventilation mode:
Away mode
Use this ventilation mode when the apartment is
unoccupied, e.g. during a trip or other long absence.
At home mode
Use this mode when the dwelling is occupied.
Boost mode
Use this mode to enhance ventilation, e.g. when there
are more people than usual in the apartment.
Selection button
The selection button is roughly 2 cm to the left from the
light switch.
CAUTION
• Neglecting the
cleaning of the
grease filter can
cause a fire hazard.
• The outer surfaces
of the hood can
become hot when
the cooker or the
oven is turned on.
• Flaming is forbidden
underneath the
cooker hood.
• Always follow the
instructions provided
on adjusting
the eciency of
ventilation.
• Enable a sucient
supply air flow
into the room if
the cooker hood
and non-electric
devices are used
simultaneously.
Vallox 51K MV
The Vallox 51K MV ventilation unit is controlled by using the
Vallox Captura cooker hood that is connected to the unit. The
cooker hood is designed to be used above the cooker top, as
a general extraction valve in the kitchen, and as a ventilation
system control panel.
The front panel of the cooker hood has four buttons.
Position of the damper
The damper is opened by pressing the damper button
(signal light turns on). The damper is closed (signal light
turns o) by pressing the damper button or automatically
after one hour (without a timer or 45-120 min when
programmed).
In normal circumstances, the damper must be closed (the
signal light is o), which boosts the extract air flow from other
premises.
The damper must be open (the signal light is turned on) when
the user wants to increase the extract air flow from the cooker
hood e.g.
• when the cooker top or the oven is used for cooking;
• the load in the kitchen is exceptional due to the use of
strong detergents, presence of a large number of people, or
similar. NOTE
The unit reminds the
user of the need to
change the filters with
the red signal light
of the Vallox Captura
cooker hood.
To set o the filter
reminder, close the
damper and then
open-close-open-close.
Press at a less than one
second interval.

7© Vallox Oy - All rights reserved
MV
NOTE
For the MyVallox Cloud/
Home instructions,
please go to www.
techmanuals.info/
ValloxMV/ENG/
onlinehelp/webhelp
Connecting the ventilation unit to the cloud
service
The ventilation unit can be connected to the MyVallox Cloud
service. The cloud service allows for controlling ventilation
remotely also, using e.g. a smartphone or tablet. Also the unit
software is updated automatically through the cloud service.
To connect to the cloud service, the ventilation unit must be
connected to the Internet via LAN and registered with the cloud
service. At the same time you create a MyVallox Cloud account
for yourself. Read more about the service at www.myvallox.com.
Brightness of the light
To adjust the brightness of the light:
1. Turn on the light, close the damper, and set the ventilation
to the Away mode.
2. Press the selection button for roughly 3 seconds until the
setting mode signal light starts to flash.
3. Adjust the brightness of the light by pressing the light
button until the brightness is adequate.
4. To save the setting, press the selection button for roughly 3
seconds until the setting mode signal light stops to flash.
To read about the other functions of the selection button, go to
our website, www.vallox.com.
Guard function
The cooker hood has a guard function that is activated when
the temperature of the cooker hood exceeds +60 °C or after
a sudden increase in temperature (> 8 °C/min). In such a case,
all signal lights of the cooker hood and the LED light will flash,
the fans of the ventilation unit will stop, and the damper of the
cooker hood will close. If this kind of alarm is noticed before fire
damage, it can be acknowledged by pressing any of the cooker
hood buttons.
INTRODUCTION

8
Extract air fan
1
Supply air fan
2
Fine filter for supply air
3
Heat recovery cell
4
Bypass damper of the HR cell
5
Coarse filter for supply air
6
Coarse filter for extract air
7
R model in the figure.
In the L model, the
parts are mirrored.
MAIN PARTS
Vallox 51 MV
Post-heating resistor
8
Control panel
9
Internal humidity sensor 10
Internal carbon dioxide sensor 10
Humidity sensor (optional) 11
Carbon dioxide sensor (optional) 12
VOC sensor (Optional) 13
Ceiling bushing for electric wires 14
INTRODUCTION
11 12
5
4
3
2
1
7
6
8
9
14
13
10
A
N
N
U
A
L
E
F
F
I
C
I
E
N
C
Y
R
A
T
I
N
G
O
F
E
X
T
R
A
C
T
A
I
R
H
E
A
T
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E
C
O
V
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R
Y
A

9© Vallox Oy - All rights reserved
MV
Extract air fan
1
Supply air fan
2
Fine filter for supply air
3
Heat recovery cell
4
Bypass damper of the HR cell
5
Coarse filter for supply air
6
Coarse filter for extract air
7
Post-heating resistor
8
Control panel (Optional)
9
R model in the figure.
In the L model, the
parts are mirrored.
MAIN PARTS
Vallox 51K MV
Internal humidity sensor
10
Internal carbon dioxide sensor
10
Humidity sensor (optional)
11
Carbon dioxide sensor (optional) 12
VOC sensor (Optional)
13
Cooker hood
14
Damper button
15
Fan speed adjustment
16
Light switch
17
Ceiling bushing for electric wires
18
INTRODUCTION
2
1
9
11
4
3
7
6
5
14
15 16
12
8
18
17
10
13
A
N
N
U
A
L
E
F
F
I
C
I
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N
C
Y
R
A
T
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N
G
O
F
E
X
T
R
A
C
T
A
I
R
H
E
A
T
R
E
C
O
V
E
R
Y
A

10
MV
INSTALLATION
MOUNTING ON THE WALL
NOTE
Avoid mounting the unit on a hollow, echoing partition
wall or on a bedroom wall, or prevent the conduction of
sound.
Note that during mounting the unit rises 10 mm higher
than the final height.
Mount the ventilation unit on the wall with a mounting plate,
as shown in the adjacent figure. Make sure that the unit is
horizontally level after mounting.
Vallox 51K MV must be mounted so that the clearance between
the bottom of the cooker hood and the cooker top is at least
426 mm in case of an electric stove and 650 mm in case a gas
stove. The clearance is 134mm (i.e. the height of the cooker
hood) more between the bottom of the ventilation unit and the
cooker top.
MOUNTING ON THE CEILING
Vallox 51 MV can be equipped with an optional ceiling mounting
plate. To attach the ceiling mounting plate:
• On rafter frames or other frame structure with M8 thread
bars so that they withstand the weight of the unit.
• Ensure that the installation plate is horizontally level, as this
determines the position of the unit.
Insulate the outdoor air and exhaust air duct against
condensation also between the unit and the ceiling mounting
plate.
Mounting the ceiling mounting plate
1. Fasten the thread bars on the rafter frames or other frame
structure, and screw the nuts onto the bars.
2. Lift the ceiling mounting plate in place.
3. Push a rubber damper and a washer to each thread bar to
the cup of the plate.
4. Turn the nuts to make sure that the unit is horizontally level.
5. Shorten the lower ends of the thread bars so that they will
be at no more than 10 mm from the lower surface of the
ceiling mounting plate.
CAUTION
The ventilation unit is very heavy. Do not perform this
procedure alone.
NOTE
A space of at least 330
mm must be reserved
in front of the unit for
maintenance purposes.
1
2
NOTE
Mount the ventilation
unit in a place where
the temperature does
not fall below +10°C.

11 © Vallox Oy - All rights reserved
MV
Installing the ventilation unit to the ceiling
mounting plate
1. Install the ceiling mounting plate with M8 thread bars so that it
is horizontally level.
NOTE
The end of the thread bars must be 5 mm or less below the
fastening nut. Do not fasten the ceiling mounting plate too
tight to the ceiling. Ensure that the sliding bars move and
restore to their original position by pulling from the operating
levers (A).
The top edge of the white covering strip of the ceiling mounting
plate can be installed against the ceiling. Alternatively, a
concealed mounting method can be used, in which case the
ceiling can be 30mm below the top of the white covering strip.
2. Ensure that the insulation washers are in place in the outlet
collars below the ceiling mounting plate.
3. The door of the unit must be removed when the Vallox 51
ventilation unit is installed onto the wall mounting plate.
4. Lift the ventilation unit close to the ceiling mounting plate
and feed the cables through the hole in the ceiling mounting
plate on top of the ceiling. Alternatively, the cables can be fed
between the ceiling mounting plate and the ventilation unit to
the rear wall, to the area shown in the adjacent figure.
NOTE
Remember to make a service door in the ceiling so that
the cables and the connection box can be accessed. The
distance between the service door and the ceiling mounting
plate must be around 500mm.
When the ventilation unit is lifted against the ceiling mounting
plate, the unit locks in place. (Where needed, guide the
mounting hooks on the ceiling mounting plate (B) to the
grooves on the side panels of the ventilation unit).
There are operating levers (A) on the front bottom corners of
the ceiling mounting plate. When the levers have been restored
to the same level with the white covering strip of the ceiling
mounting plate, the unit has been locked in place.
5. Where required, the unit can be detached from the ceiling
mounting plate. Remove the door of the unit. Lift the unit
slightly upwards and pull simultaneously from both operating
levers (A) of the ceiling mounting plate to detach the unit from
the ceiling mounting plate.
Attic floor penetration plate
The attic floor penetration plate (F) is optional. When an attic floor
penetration plate is used, the tightness of the vapour barrier has to
be ensured.
The minimum distance of the attic floor penetration plate from
the rear wall is 5mm. The minimum distance of the attic floor
penetration plate from the side walls is 15mm.
INSTALLATION
A socket in
this area
5
B
1
2
4
3
A
500 mm
AB

12
MV
INSTALLATION
REMOVAL OF CONDENSING WATER
Vallox 51 MV
The Vallox Silent Klick siphon is installed in the bottom pool of
Vallox 51 MV. The condensing water tube is led from the siphon
e.g. to the siphon of the sink or to the floor drain. Alternatively,
an elbow can be installed in the bottom pool, in which case the
Vallox Silent Klick siphon is installed in the condensing water
tube to enable maintenance measures.
EXTERNAL ELECTRICAL
CONNECTIONS
External electrical connections are led to the ventilation unit
through the ceiling bushing for electric wires. The length of the
wires must enable pulling the fan chamber assembly out of the
unit without having to disconnect any of the connections.
NOTE
The Vallox Silent Klick
siphon package is
delivered with Vallox
51 MV and 51K MV.
Installation instructions
for the siphon are
enclosed with the
packaging, and can
also be found online at
www.vallox.com. When
the alternative siphon
installation method is
used, the ring seal and
the locking part must
be moved to the pipe
connection part that is
mounted on the wall.
175
89
351
668
598
1735
89

13 © Vallox Oy - All rights reserved
MV
R L
90 90
Observe in the figure:
1. Elbow.
2. Exit hole for the condensing water outlet.
Vallox 51K MV
In Vallox 51K MV, an elbow is mounted on the bottom pool between
the unit and the cooker hood. A condensing water tube is led from
the elbow e.g. into the siphon of the sink or to the floor drain. The
siphon must not be installed inside the cooker hood. Instead, it
must be installed in the condensing water tube so as to enable
maintenance measures. There are approx. 2 mm wide holes at the
rear of the bottom of the Vallox 51K MV ventilation unit marking the
position where the condensing water tube must be installed.
1. Install the elbow at the bottom of the ventilation unit without
the siphon (Figure 1). Install the siphon in the condensing water
tube before the drain or odour trap (Figure 2). The Vallox Silent
Klick siphon helps prevent noise disturbance caused by the
removal of condensing water.
2. The condensing water tube must be installed either directly
backwards from the cooker hood through the wall, if there
is a sewer connection behind the wall (see figure 2 for the
dimensions of the tube location), or to the odour trap of the
sink (Figure 2).
3. The condensing water pipe must be placed at an angle so that
it always points downwards.
2
1
1
2
12
INSTALLATION

14
MV
CAUTION
The minimum clearance
between the bottom
edge of the cooker
hood and an electric
stove is 426mm.
INSTALLATION OF THE VALLOX
CAPTURA COOKER HOOD
The Vallox Captura cooker hood is installed on the bottom of
Vallox 51K MV.
1. Remove the plug from the feedthrough seal of the
condensing water tube of the cooker hood (Figure 1).
2. Lift the cooker hood and fit the hooks at the rear of the
cooker hood into the holes at the bottom of the ventilation
unit. Push in place (Figure 2).
3. Ensure that the feedthrough seal of the condensing water
tube sits firmly around the tube.
4. Lift the front of the cooker hood to fit the mountings into the
penetrations in the bottom of the ventilation unit (Figure 3).
5. Fasten the M5 hexagon screws (2) through the mountings
(Figure 4).
Lead the power cord and the control cable up along the
cable channel (Figure 3). Wind approx. half a metre of the
cables behind the cooker hood so that it can be removed for
maintenance purposes where required. Move the metal cover
backwards so that it covers the opening between the cooker
hood and the wall (Figure 5).
12
3 4 5
INSTALLATION

15 © Vallox Oy - All rights reserved
MV
MEASURING AND ADJUSTING THE AIR
FLOWS OF THE VENTILATION UNIT
92
1
Ø6
16
The accessories delivered with the unit include four (4) air flow
measuring tubes. These can be inserted in the ducts to allow for
easier ventilation adjustment.
MEASURING AND ADJUSTING THE AIR
FLOWS OF THE COOKER HOOD
Standard ventilation
The volume flow rate of the air inside the cooker hood is
measured with the damper closed and, where required, adjusted
based on the static pressure loss and the performance scheme of
the cooker hood.
• The static pressure loss is measured from the hole in the
damper using the measuring tube found in the accessory bag
(see Figure).
• Determine the volume flow rate from the performance
scheme based on the measured pressure and the number of
open holes in the damper.
Adjustment:
• Cover the required number of holes in the damper with the
magnetic strip that is delivered with the cooker hood.
dp
INSTALLATION

16
MV
Air flow measurement points
Air flow measuring tubes are placed in
the ventilation ducts in accordance with
the instructions. The standard air flow
from the cooker hood is measured past
the damper. The fan curves indicate the
total pressure accounted for by duct
losses.
A Supply air
B Extract air
C Cooker hood extract air
D Supply air fan
E Extract air fan
R model in the figures. In the L model,
the order of the ducts is mirrored.
C
BABA
DEDE
Vallox 51K MV
Vallox 51 MV
INSTALLATION
Damper in the closed position
Adjustment position Holes of the damper open
2 2
3 3
4 4
5 5
6 6
7 7
8 8
Standard ventilation (settings 2-8)
2 3 4 5 6 7 8 9 10
20
30
40
50
60
70
80
90
20
0
30
0
4
00
10
100
45
40
35
30
25
L
pA
, dB(A)
75 6432 8
Static pressure Pa
Air flow dm/s
STANDARD VENTILATION OF THE COOKER HOOD

17 © Vallox Oy - All rights reserved
MV
Dimensions
Duct outlets
Inner diameter of the
female collar: 125mm
1. Outdoor air to the unit
2. Exhaust air flowing outdoors from the
unit
3. Supply air from the unit to the
apartment
4. Extract air from the apartment to the
unit
L model
R model
INSTALLATION
239
103
81
598
96
155 141141
143
1
23
4
239
103
81
598
239
155 141141
143
32
1
4
DIMENSIONS AND DUCT OUTLETS
89 173
17
89
598
668
52
349 10
A B
500mm
349
368
597
598
802
668
17
23
23
15
Vallox 51 MV
Vallox 51K MV
A double
socket in
this area
There are two condensing water discharge
outlets at the bottom. The condensing water
outlet or siphon is connected to a free, not
plugged, discharge outlet.
A. The condensing water outlet /siphon is
connected here in case of a right-handed unit
B. The condensing water outlet /siphon is
connected here in case of a left-handed unit

18
MV
BEFORE BEGINNING
MAINTENANCE WORK
WARNING
Always disconnect the power plug before starting
maintenance on the ventilation unit. The unit has no
safety switch that would switch the power o when
the door of the unit is opened.
REPLACING THE FILTERS
The Vallox ventilation unit has three filters:
• Coarse filter for supply air filters insects, heavy pollen
and other relatively large foreign objects out of the
outdoor air.
• Fine filter for supply air filters microscopic pollen and
dust particles out of the supply air.
• Coarse filter for extract air filters the extract air and
keeps the heat recovery cell clean.
The filter replacement interval depends on the ambient
particle concentration. It is recommended that the filters
be replaced every spring and autumn, or at the very least
once a year.
To replace the filters:
1. Disconnect the ventilation unit from the mains
electricity supply.
2. Open the door of the unit.
CAUTION
The door is heavy.
3. Remove the old filters (A, B, C) and discard them.
4. Install the new filters (A, B, C).
5. Close the door of the unit.
6. Plug the ventilation unit back into the mains.
7. The filters have now been successfully replaced.
MAINTENANCE
MAINTENANCE
NOTE
The service space in
front of the ventilation
unit must be at least
330 mm.
A
B
C
TIP
Using original Vallox
filters ensures that the
ventilation unit remains
in top condition, giving
the best results. To
select and order filter
packages, please go to:
filters.vallox.com

19 © Vallox Oy - All rights reserved
MV
CLEANING THE HEAT RECOVERY
CELL
Check that the heat recovery cell is clean roughly once a year,
or whenever the filters are being replaced. Clean by washing
as required.
Cleaning the heat recovery cell:
1. Disconnect the ventilation unit from the mains electricity
supply.
2. Open the door of the ventilation unit by undoing the
finger screws and by lifting the door o.
CAUTION
The door is heavy.
3. Pull out the black upper support of the cell (E) located
above the cell.
4. Lift and pull the cell (D) out of the unit.
IMPORTANT
Handle the cell carefully! Do not lift the cell by the
layers. The cell layers are very thin and easily damaged.
5. If the cell is dirty, clean it by immersing it in warm water,
to which a small amount of a mild detergent has been
added.
6. Rinse the cell clean with a water spray. Do not use a high-
pressure cleaner.
7. When all the water has drained from between the layers,
reassemble the ventilation unit in the reverse order.
8. Close the door.
9. Plug the ventilation unit back into the mains. The heat
recovery cell has now been cleaned.
MAINTENANCE
CONDENSING WATER
In the heating season, the extract air humidity condenses to
water. In new buildings, the volume of condensing water can be
high. Condensed water must be able to freely leave the unit.
At some time before the heating season begins (e.g. during
autumn maintenance), check that the siphon or the condensing
water outlet in the bottom pool are not clogged. To check this,
pour some water into the pool. Clean as required.
NOTE
Some condensing water
may have accumulated
in the bottom pool
of the unit; this is
normal and requires no
corrective action.
WARNING
Water must at all times
be kept out of the
electrical system.
D
E
D

20
MV
CLEANING THE FANS
Check the cleanliness of the fans when servicing the filters and the
heat recovery cell. Clean the fans as required.
Removing and cleaning the fans
To clean the fans:
1. Disconnect the ventilation unit from the mains electricity supply.
2. Undo the door screws to open the door of the Vallox ventilation
unit.
3. Lift the door o.
CAUTION
The door is heavy.
4. If the length of the cables that are led out of the unit through
the ceiling bushing (G) and connected to the connection
card (F) in the electric box prevents moving the fan chamber
suciently far from the ventilation unit, disconnect the cables.
Pull these cables out of the unit through the ceiling bushing.
5. Detach outdoor and extract air temperature sensors from the
ceiling mounts. Remove the round feedthrough rubbers (H)
from the slots on the intermediate walls of the unit by pulling.
6. Undo the earthing screw (K) on the upper left corner of the
electric box.
7. Release the damper motor (J) by placing an orange magnet (I)
on the magnet icon on the damper motor. Observe the location
of the magnet so that you will be able to return it to its original
location after maintenance. Remove the bar from the joint of
the damper. Turn the crank of the damper motor so that the bar
comes o from the bypass damper and turn the damper into
the cell bypass position.
8. Pull out the upper support of the cell (E). Lift and pull the cell (D)
out of the unit.
9. Pull the fan chamber (M) out of the unit (contains the fans,
electric box, and the bypass duct incl. the damper motor).
10. The fans are mounted on the fan chamber by means of three
screws (L). Do not undo the earthing screw at the bottom edge
on the rear wall side.
11. Disconnect the quick connectors of the fan cable.
12. Clean the fans. The fan can be cleaned with compressed air
(wear protective goggles) or by brushing it gently.
13. To reassemble the ventilation unit, follow the above steps in
reverse order.
NOTE! Remember to reconnect the bar of the damper motor
into the joint of the damper and to lock the connection
with the orange magnet. Ensure that the sensors and their
feedthrough rubbers are in correct locations. Also ensure
that all the connections have been correctly implemented
and the earthing screw is in place in the left corner.
MAINTENANCE
IMPORTANT
The fans are
extremely sensitive
to external shocks. It
is recommended that
the fans be cleaned
in place, i.e. without
attempting to remove
them. Handle the fan
blades carefully.
It is recommended that
the fans be cleaned by
a professional.
D
F
I
E
J
H
G
K
M
L
M