Vallox D3741 User manual

Manual
Model
Vallox 101 MV
Type
D3741
Document
D5331
Valid from
02.05.2022
Updated
04.07.2023
Ventilation unit
MANUAL

2
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
Filter reminder ......................................... . . . . . . .5
Ventilation unit setup without a MyVallox control panel ..... . . . . . . .5
Connecting the ventilation unit to the cloud service ........ . . . . . . .5
Main parts .................................................. . . . .6
INSTALLATION.................................. . . . . . 7
Mounting on the wall ......................................... . . . . 7
Mounting on the ceiling ...................................... . . . . 7
Mounting the ceiling mounting plate...................... . . . . . . . 7
Installing the ventilation unit to the ceiling mounting plate . . . . . . . . .8
Attic floor penetration plate.............................. . . . . . . .8
Removal of condensing water ................................. . . . .9
Dimensioning figures and space required for installation
of the Vallox Silent Klick siphon .......................... . . . . . . .9
Space required by the alternative Vallox Silent Klick
siphon installation method (elbow) ....................... . . . . . . .9
Measuring and adjusting the air flows of the ventilation unit ...... . . . .9
Dimensions and duct outlets.................................. . . . 10
MAINTENANCE ................................ . . . . 11
Before beginning maintenance work........................... . . . 11
Replacing the filters .......................................... . . . 11
Cleaning the heat recovery cell ............................... . . . 12
Condensing water ........................................... . . . 12
Cleaning the fans ............................................ . . . 13
TECHNICAL SPECIFICATIONS .... . . . 14
Internal electrical connection ................................. . . . 15
External electrical connection................................. . . . 16
External electrical connection for controlling the MLV duct radiator . . . 17
Duct radiator operation....................................... . . . 18
Duct radiator operation chart ................................. . . . 19
In the outdoor air duct .................................. . . . . . . 19
In the supply air duct.................................... . . . . . . 19
Exploded view and parts list .................................. . . 20
Conformity certificates ....................................... . . . 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

3© Vallox Oy - All rights reserved
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.
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 be carried out
only 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.
IMPORTANT
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.
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

4
SAFETY SIGNS USED IN THE INSTRUCTIONS
INSTALLATION OPTIONS
• Vallox 101 MV can be mounted either on the wall, or on the ceiling
by using a mounting plate (optional).
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 panel
Modbus KNX
KNX bus
module
1
23
4
5
6

5© Vallox Oy - All rights reserved
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.
NOTE
For the MyVallox Cloud/
Home instructions,
please go to
vallox.techmanuals.info/
ValloxMV/ENG/help/
webhelp
IMPORTANT
Prolonged overpressure
can result in damage
to the structures of the
building.
VENTILATION UNIT CONTROL
Ventilation unit control options
Operation of the Vallox ventilation unit can be controlled by the
following means:
• Through the MyVallox 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.
Filter reminder
The unit reminds the user of the need to change the filters through
the MyVallox control panel and the MyVallox Home/Cloud user
interface, as well as by changing the relay status, if a signal light
has been connected to the relay connectors of the unit.
The filter reminder can be acknowledged:
• From the MyVallox control panel
• From the MyVallox Home/Cloud user interface
• From the Vallox Delico PTD EC and Vallox Capto PTC EC
control hoods — Damper closed, then open-closed-open-
closed. Press at a less than 1 second interval.
Ventilation unit setup without a MyVallox
control panel
The ventilation unit setup can also be completed without a
MyVallox control panel. For instructions, please go to
https://vallox.techmanuals.info/ValloxMV/ENG/help/webhelp
See instructions provided in the section Connecting the ventilation
unit to the computer.
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.

6
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
MAIN PARTS
Post-heatingresistor (in the supply air duct)
8
Safety switch 9
Internal carbon dioxide and
humidity sensor
10
Control panel
11
Carbon dioxide sensor (optional) 12
Humidity sensor (optional)
13
VOC sensor (Optional) 14
Ceiling bushing for electric wires 15
INTRODUCTION
1
5
3
6
8
9
10
7
2
4
13
1211 14
15
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
R
E
C
O
V
E
R
Y
A
+

7© Vallox Oy - All rights reserved
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.
The minimum distance between the top of the unit and the
finished ceiling surface is 30 mm. Note that during mounting the
unit rises 10 mm higher than the final height.
Mount the ventilation unit onto the wall with a mounting plate
(optional), as shown in the figures below. Make sure that the unit is
horizontally level after mounting.
MOUNTING ON THE CEILING
Vallox 101 MV can be equipped with an optional ceiling mount 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.
• 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.
Insulate the ducts 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.
4. Adjust the nuts so that the ceiling mounting plate is level.
5. Shorten the lower ends of the thread bars so that they are no more
than 5 mm below the nuts.
CAUTION
The ventilation unit is very heavy. Do not perform this
procedure alone.
INSTALLATION
INSTALLATION
NOTE
When installing the unit,
reserve a space of at
least 555 mm in front
of the unit for servicing
purposes.
NOTE
Mount the ventilation
unit in a place where
the temperature does
not fall below +10°C.

8
INSTALLATION
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 the outlet collars
below the ceiling mounting plate.
3. Remove the door before installing the ventilation unit to the
ceiling mounting plate.
4. Lift the ventilation unit close to the ceiling mounting plate
and feed the cables and the connection box through the
hole in the ceiling mounting plate on top of the ceiling.
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.
Alternatively, the cables can be fed to the rear wall
between the ceiling mounting plate and the ventilation
unit. 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 (D) is optional. When an attic
floor penetration plate is used, the tightness of the vapour
barrier has to be ensured.
The attic floor penetration plate can be fastened on the finished
rear wall. The minimum distance of the attic floor penetration
plate from the finished side walls is 15 mm.
1
3
4
5
2
B
B
A
A
D

9© Vallox Oy - All rights reserved
INSTALLATION
38
140
141
75
R
L
291
291
147,5 147,5
53
REMOVAL OF CONDENSING WATER
Dimensioning figures and space required for
installation of the Vallox Silent Klick siphon
MEASURING AND ADJUSTING THE AIR
FLOWS OF THE VENTILATION UNIT
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.
NOTE
The Vallox Silent Klick
siphon package is
delivered with the unit.
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.
Space required by the alternative Vallox Silent Klick
siphon installation method (elbow)
92
1
Ø6
16

10
DIMENSIONS AND DUCT OUTLETS
INSTALLATION
Air flow measurement points
1. A Supply air
2. B Extract air
Measurement points after the outlet collar. The fan curves indicate the
total pressure accounted for by duct losses.
Main parts
1. Extract air fan
2. Supply air fan
3. Fine filter for supply air
4. Heat recovery cell
5. Bypass damper of the
HR cell
R model in the figure.
In the L model, the parts are mirrored
6. Coarse filter for supply air
7. Coarse filter for extract air
8. Post-heating resistor
(in the supply air duct)
9. Safety switch
10. Internal humidity and
carbon dioxide sensor
Dimensions and duct outlets
Dimensions
Duct outlets
Inner diameter of the female collar: 125mm
1. Supply air from the unit to the apartment
2. Extract air from the apartment to the unit
3. Exhaust air flowing outdoors from the unit
4. Outdoor air to the unit
1
5
3
6
8
9
10
7
2
4
A
B
598
53
500
447
292
569
600
596
136,5
461,5
154,5
443,5
238 122
598
104
322
484
1
2
3
4
125
L
596
136,5
461,5
154,5
443,5
238 122
598
104
322
484
1
2
3
4
125
R

11 © Vallox Oy - All rights reserved
BEFORE BEGINNING
MAINTENANCE WORK
The safety switch (S) automatically turns o the power
when the door of the unit is opened.
WARNING
Always disconnect the power plug before starting
the ventilation unit maintenance.
There are two unit models, left- (L) and right-handed (R).
The figure shows the right-handed model.
REPLACING THE FILTERS
When the maintenance reminder becomes activated,
check the cleanliness of the filters and replace them if
required.
The Vallox ventilation unit has three air 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 Vallox ventilation unit by
undoing the finger screws.
3. Lift the door o.
4. Remove the old filters (A, B, C) and discard them.
CAUTION
The door is heavy.
5. Install the new filters (A, B, C).
6. Close the door of the unit. Ensure that the safety
switch catch of the door is touching the safety switch,
allowing the unit to be turned on.
7. Plug the ventilation unit back into the mains.
The filters have now been successfully replaced.
MAINTENANCE
MAINTENANCE
C
B
S
A
NOTE
The service space in
front of the ventilation
unit must be at least
555 mm.
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
IMPORTANT
If the power cord
is damaged, the
manufacturer, its
service representative
or other person with
similar qualifications
must replace it to avoid
danger.

12
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.
To check and clean the heat recovery cell:
1. Disconnect the ventilation unit from the mains electricity
supply.
2. Open the door of the Vallox ventilation unit by undoing
the finger screws.
3. Lift the door o.
CAUTION
The door is heavy.
4. Remove the sealing strip (E) above the HR cell in the
direction of the arrow.
5. Remove the extract air filter (C).
6. Lift and pull the HR cell (D) out of the unit.
7. 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.
8. Rinse the cell clean with a water spray. Do not use a high-
pressure cleaner.
9. When all the water has drained from between the layers,
reassemble the ventilation unit as follows:
10. Ensure that the lower support (F) is in place between the
knobs at the bottom of the unit.
11. Push the heat recovery cell in place.
12. Push the sealing strip (E) in place so that the strip is
supported by the corner bracket (G) at the rear.
13. Install the extract air filter (C) in place.
14. Close the door. Ensure that the safety switch catch of the
door is touching the safety switch.
15. Plug the ventilation unit back into the mains.
The heat recovery cell has now been checked and
cleaned.
MAINTENANCE
IMPORTANT
Handle the cell
carefully! For example,
do not lift the cell by the
layers. The cell layers
are very thin and easily
damaged.
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
C
G
E
F

13 © Vallox Oy - All rights reserved
CLEANING THE FANS
Check the cleanliness of the fans when servicing the filters and the
heat recovery cell. Clean the fans as required.
You can clean the fan blades with compressed air (wear protective
goggles) or by brushing them gently. Do not remove or move the
fan blade balancing weights.
To clean the fan:
1. Disconnect the ventilation unit from the mains electricity supply.
2. Open the door of the Vallox ventilation unit by undoing the
finger screws.
3. Lift the door o.
CAUTION
The door is heavy.
4. Remove the extract air filter (C), the sealing strip (E) and the
heat recovery cell (D). See chapters “Replacing the filters” and
“Cleaning the heat recovery cell”.
5. Disconnect the quick connector (H) of the supply air fan (T) and/
or the extract air fan (P) cables.
6. Push the fan cables and the rubber feed through (I) into the fan
chamber.
7. Remove the screws used to fasten the fans (J) (3 screws per
fan). Undo the mounting screws (K) (3 screws per fan) of the air
flow control grille of the fan and remove the grille (S).
8. Remove the fan from the unit by pulling it forward and by tilting
it slightly backwards at the same time.
9. You can now clean the fan. You can clean the fan blades with
compressed air (wear protective goggles) or by brushing them
gently.
10. Reassemble in reverse order after cleaning. Ensure that the
rubber feed throughs set in place when reinstalling the fan.
Ensure that the air flow control grilles are in place.
11. Close the door. Ensure that the safety switch catch of the door
is touching the safety switch.
12. Plug the ventilation unit back into the mains.
The fan has now been checked and cleaned.
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. Do not
remove or move the
fan blade balancing
weights.
TP
D
C
E
I
T
P
H
JJ
K
S
K

14
50
100
150
200
250
300
350
0 10 20 30 40 60 70 80 90 100 50
36 72 1080 144 180 216 252 288 324 360 m³/h
(l/s)
dm³/s
0
70 %
60 %
50 %
40 %
30 %
20 %
10 %
80 %
SFP 1,0
SFP 1,5
SFP 1,8
100 %
TECHNICAL SPECIFICATIONS
FAN INPUT POWER
Input power (total) (W)
Air flow (max) (dm3/s)
SFP = SFP rate (Specific Fan Power)
recommended value <1.8 (kW m3/s)
Volume flow rate
Power (W)
SUPPLY/EXTRACT AIR VOLUMES
Volume flow rate (dm3/s)
Pressure loss in ducts. Total pressure (Pa)
extract air
supply air
Sound power level in the supply air duct (one duct)
by octave band Lw, dB
Sound power level in the extract air duct (one duct)
by octave band Lw, dB
Adjustment position Adjustment position
Adjustment position (%) 10 20 30 40 50 60 70 80 100 10 20 30 40 50 60 70 80 100
Air flow dm/s 15 24 34 42 51 62 69 77 83 23 31 41 50 60 70 78 86 92
Air flow m/h 54 86 122 151 184 223 248 277 299 83 112 148 180 216 252 281 310 331
Medium
frequency
of the
octave
band
Hz
63 62 64 69 73 77 82 84 87 88 54 55 62 66 69 75 78 79 80
125 53 63 65 65 67 71 74 76 78 46 50 53 56 59 62 65 67 68
250 48 56 60 65 70 71 73 75 75 39 45 51 55 60 59 61 62 64
500 43 49 56 60 64 67 69 71 73 29 35 40 44 47 50 55 54 56
1000 35 43 49 53 56 61 64 65 67 16 24 30 34 37 40 43 46 46
2000 25 36 44 49 52 56 58 61 62 13 17 23 28 32 36 38 41 42
4000 18 23 32 38 43 48 51 54 55 17 17 18 20 24 28 30 33 35
8000 21 22 29 37 43 49 52 55 57 21 21 21 21 22 23 25 28 29
LW, dB 63 67 71 74 78 83 85 88 88 54 57 63 66 70 75 78 79 80
LWA, dB (A) 43 53 57 61 65 68 71 72 74 35 40 45 49 53 55 58 59 60
Sound pressure level coming through the envelope of the unit in the room in which it is installed (10m sound absorption)
Adjustment position / Air flows (supply/extract)
Adjustment position (%) 10 20 30 40 50 60 70 80 100
Air flow dm/s 15/20 24/30 33/40 42/48 52/58 61/68 70/76 78/84 83/89
Air flow m/h 54/72 86/108 119/144 151/173 187/209 220/245 252/274 281/302 299/320
LpA, dB (A) 22 27 32 35 38 43 44 46 47
SOUND VALUES
TECHNICAL SPECIFICATIONS
Product title
Vallox 101 MV R
Vallox 101 MV L
Product number
4102189
4102197
Air volumes
Supply air
Extract air
90 dm3/s, 100 Pa
94 dm3/s, 100 Pa
Fans
Supply air
Extract air
0.115 kW 0.9 A EC
0.115 kW 0.9 A EC
Post-heating Electrical resistor, 1500 W Electrical connection 230 V, 50 Hz, 8.3 A power plug
Pre-heating –Enclosure protection class IP 34
Additional heating –Heat recovery bypass Automatic
Filters
Supply air
Extract air
ISO Coarse > 75 % + ISO ePM
ISO Coarse > 75 %
Specific energy consumption (SEC)
in a cold climate
in a temperate climate
A+
A
Operating eciencies*
Annual eciency
Supply air eciency
Specific Fan Power (SFP)
75 %
82 %
1.33 kW/m/h (63 dm/s)
Dimensions (w x h x d) 598 x 449 x 596 mm Weight 58 kg
*Working point defined in the Ecodesign Directive (2009/125/EC), Southern Finland, Helsinki-Vantaa TRY year 2012.
0
50
100
150
200
240
0 10 20 30 40 50 60 70 80 90 100
36 72 1080 144 180 216 252 288 324 360
dm³/s
(l/s)
m³/h
10 % 20 %
30 %
40 %
50 %
60 %
70 %
80 %
100 %
You can calculate the sound values for each operating point with the Vallox MySelecta software.

15 © Vallox Oy - All rights reserved
TECHNICAL SPECIFICATIONS
INTERNAL ELECTRICAL CONNECTION
BK Black
BU Blue
BN Brown
WT White
GY Grey
YE Yellow
YEGN Yellow-green
CABLE COLOURS
AMotherboard
B
1. Extract air fan tacho (WT)
2. GND (GN)
3. Extract air fan PWM (YE)
4. Supply air fan tacho (WT)
5. GND (GN)
6. Supply air fan PWM (YE)
C
1. Extract air
2. Outdoor air
3. Supply air
4. Exhaust air
5. Supply air from the HR cell
DLAN
TK
NTC
GND
P
T
WT
2
3
1
YEGN
YEGN
BN
BU
BN
BU
YEGN
YE
GN
D/I2
BN
BU
BN
BN
N
L
N
L
N
L
N
AHS
%RH
%RH
CO2
230V 50Hz
90°C
TESTER
M
130°C
T1 T2
R1
D/I1
BN
YEGN
BU
YEGN
WT
YE
GN
+11V1
MB_B
MB_A MB_A
MB_B
+24V
RS_A
RS_B
GND
AN/I
GND
+24V
RS_A
RS_B
GND
RM/I
RM/O
+24V
+24V
+24V
RS_A
+24V
RS_A
RS_B
GND
RS_B
GND
YEGN
BU
BU
L
1
2
3
4
5
1 2 3 4 5 6
A
BC
D
MB_A External Modbus A signal
MB_B External Modbus B signal
+24V +24V voltage (DC)
GND Digital and analog ground potential
RS_A Local hardware Modbus A signal
RS_B Local hardware Modbus B signal
NTC External temperature sensor connector
D/I1 Digital input 1
D/I2 Digital input 2
11V1 11.1 V operating voltage
AN/I Analog input 0-10VDC
RM/I 24V relay input
RM/O 24V relay output
TSupply air fan
PExtract air fan
MDamper motor
TK Safety switch
AHS Post-heating control
%RH Internal humidity sensor
%RH CO2Internal humidity and carbon dioxide
sensor
R1 Post-heating resistor with 90°C and
130°C overheating protection

16
TECHNICAL SPECIFICATIONS
EXTERNAL ELECTRICAL CONNECTION
3x1,5S
2x2x0,5+0,5
2x0,5
2x0,5
7028350
2014-08-29 JS
2x2x0,5+0,5
2x0,5
2x2x0,5+0,5
2x2x0,5+0,5
2x2x0,5+0,5
2x0,5
2x0,5
CAT
Analog input
two dierent
functions
Potential-free contact
data 24VDC can be
programmed to display
information such as errors
or to control the valve
and pump of the MLV
radiator.
Plug connection
1.2 m on top of the unit
REMOTE
MONITORING
Modbus RTU
VENTILATION UNIT INTERNAL
ELECTRICAL CONNECTION
MyVallox
%RH
sensor
MyVallox
CO2
sensor
External
temperature
sensor
NTC 4K7
Digital input 1
8 dierent
functions
Digital input 2
8 dierent
functions
Ethernet connection
on top of the unit
RJ45 female
0.3W
1.2W
1W
1W
MyVallox
VOC
sensor
2W MyVallox
control
panel
MyVallox
control
panel
MB_A External Modbus A signal D/I1 Digital input 1
Maximum ≤6W MB_B External Modbus B signal D/I2 Digital input 2
MyVallox Control 1W +24V +24V voltage (DC) 11V1 11.1 V operating voltage
MyVallox Touch 0.5 W. GND Digital and analog ground potential AN/I Analog input 0-10VDC
MyVallox %RH sensor 0.3W RS_A Local hardware Modbus A signal RM/I 24V relay input
MyVallox COsensor 1.2W RS_B Local hardware Modbus B signal RM/O 24V relay output
MyVallox VOC sensor 2W NTC External temperature sensor connector
Voltage 24 VDC
POWER SUPPLY

17 © Vallox Oy - All rights reserved
TECHNICAL SPECIFICATIONS
3x1,5S
2x0,5
L
+24VDC
CAT
GND
P V
L N
1 2
N
2x0,5
Ethernet
connection
on top of the unit
RJ45 Female
Plug connection
1.2 m on top of the unit
24 VDC relay/contactor
for controlling the pump
and solenoid valve
VENTILATION UNIT INTERNAL
ELECTRICAL CONNECTION
Distribution
board
MLV control
External
temperature
sensor
NTC 4K7
MB_A External Modbus A signal
MB_B External Modbus B signal
+24V +24V voltage (DC)
GND Digital and analog ground potential
RS_A Local hardware Modbus A signal
RS_B Local hardware Modbus B signal
NTC External temperature sensor connector
D/I1 Digital input 1
D/I2 Digital input 2
11V1 11.1 V operating voltage
AN/I Analog input 0-10VDC
RM/I 24V relay input
RM/O 24V relay output
PCirculation pump
VSolenoid valve
EXTERNAL ELECTRICAL CONNECTION FOR
CONTROLLING THE MLV DUCT RADIATOR

18
TECHNICAL SPECIFICATIONS
Always follow first and foremost the connection diagram
provided by the HVAC designer or heat pump manufacturer.
Also read the duct radiator manual.
The accompanying figure shows an example of the
arrangement for connecting the heating/cooling radiator unit
to the heat collection circuit.
Connect the radiator output pipe to the heat collection circuit
return pipe. Direct the fluid returning from the radiator unit to
the heat collection circuit return pipe. If you know that there is
a large loss of internal pressure inside the heat pump, the heat
pump should be bypassed. If this is done, the fluid circuit will
come into operation when the heat pump comes to a halt. When
this happens the pressure loss in the one-way bypass valve Y2
must be lower than the pressure loss in the heat pump.
Heating: The pump starts when the outdoor air temperature
drops below the winter limit value set at the factory (-5 °C).
Cooling The supply air setpoint value for the active mode
(for example, At home) controls the pump start-up. The pump
starts when the supply air setting is below the temperature of
the supply air that is blown into the apartment.
The duct radiator can be installed in both the supply air
duct and the outdoor air duct. If the radiator is installed in
the outdoor air duct, it can be used for both preheating and
cooling. If the radiator is installed in the supply air duct, it can
be used for heating or for cooling only.
The duct radiator can be set to function either automatically
or manually.
• Automatic - In summer, the supply air temperature will
be maintained at the level specified in the temperature
setting. In winter, the duct radiator will turn on, when the
outdoor temperature falls below the winter setting.
• Manual - In summer, the duct radiator will turn on, when
the outdoor temperature rises above the summer setting.
In winter, the duct radiator will turn on, when the outdoor
temperature falls below the winter setting.
To prevent the risk of condensation in the supply air duct, you
can set the adjustment of the supply air limit to automatic or
manual.
• Automatic - The supply air limit is adjusted automatically
based on the dew point of the extract air. When the supply
air temperature falls too low, the duct radiator will turn o.
• Manual - The supply air limit can be set manually. When
the supply air temperature falls down to the set value, the
duct radiator will turn o.
If an external sensor is in use, it is selected from the settings
of the external sensor whether it is used to control the
outdoor air duct radiator or the supply air duct radiator. The
temperature of the external sensor can be read from the
service menu: menu > service menu > unit information page 5
”External sensor”.
NOTE: If the duct
radiator is used in
the supply air duct, it
can only be used for
cooling.
NOTE: When used to
control the outdoor air
duct radiator, the exter-
nal NTC sensor is ins-
talled in the outdoor air
duct before the radiator.
When used to control
the supply air duct ra-
diator, the external NTC
sensor is installed after
the radiator.
NOTE:
When selecting the
relay (C), take account
of the maximum
allowed combined
power supply (6W) of
the circuit board in the
external MV electrical
box, if the relay power
supply comes from the
circuit board’s +24V
connector.
NOTE:
Due to the risk of humi-
dity damage, in a duct
that has not been insu-
lated for condensation
the supply air tempera-
ture must not fall below
+16 … 20 °C.
DUCT RADIATOR OPERATION

19 © Vallox Oy - All rights reserved
TECHNICAL SPECIFICATIONS
S
IP
P
V
KC
YY2
A
G
H
D
F
E
N
BC
N
DUCT RADIATOR OPERATION CHART
AVentilation unit
BSupply air
COutdoor air
DFeed from the distribution board
EAir extraction
FDuct radiator (reverse connection)
GHeat pump
HHeat collection circuit
NExternal NTC sensor
PCirculation pump. Not included in the delivery. The pump should be suited to pumping liquid colder than the surrounding air, due to risk of condensation (for example, Grundfos
Magna 1 25-80).
VSolenoid valve. Not included in the delivery. The valve that is chosen must be compatible
with the heat collection circuit fluid (for example, Danfoss 032U161431).
KCondensing water tube. Not included in the delivery.
IP De-aerator. Not included in the delivery.
S External electrical junction box for the MV
N External NTC sensor for Vallox MV ventilation units
C24 VDC relay/contactor for controlling the pump and the solenoid valve. Not included in
the delivery. (For example, ABB CR-P024DC2)
YOne-way valve. Not included in the delivery.
Y2 One-way valve. Not included in the delivery. The pressure loss must be less than the
pressure loss of the heat pump.
In the supply air duct
IP
BC
G
H
D
E
S
P
V
K
C
Y Y2
A
F
N
In the outdoor air duct

20
TECHNICAL SPECIFICATIONS
EXPLODED VIEW AND PARTS LIST
NO. PART CODE NO. PART CODE NO. PART CODE
1. Supply / extract air fan 935455 11. HR cell bypass damper
assembly 4102523 21. RJ45 extension cable 952197
2.
Air flow control grille 935451. 12. Damper motor 930621 22. Connection box 3526700
3. Wall mounting plate
(optional) 3080710 13. Post-heating resistor 942220 23.
MyVallox Control panel
MyVallox Touch control panel
949033
949090
4. Siphon Vallox Silent
Klick 3494701 14. Door 4102334 24. MyVallox humidity sensor (optional) 946149
5. Coarse and fine filter for
supply air 978225 15. Mounting screw of the door 990712 25. MyVallox carbon dioxide sensor (optional) 949111
6. HR cell 933260 16. Motherboard 949032-1 26. MyVallox VOC sensor
(optional) 949112
7. Lower support for HR
cell 4102504 17. Safety switch 948370 27. Supply air filter frame 4108194
8. Upper support for HR
cell 3467200 18. Glass tube fuse 63mA slow 5x20mm 952490
9. Filter frame (extraction) 978226 19. NTC sensor kit 7033900
10. Coarse filter
for extract air 978227 20. Internal humidity and carbon dioxide sensor 4107982
1
1
3
5
67
2
8
10
9
13
1415
17
161819
20
21
11
12
4
22
23
24
25
26
27 2