Vallox A3741 User manual

Manual
Model
Vallox 101 MV
Type
A3741
Document
D5331
Valid from
24.02.2020
Updated
05.02.2020
Ventilation unit
MANUAL

2
INTRODUCTION............................... . . . . . . . . 2
Safety ...................................................... . . . . . . .3
Installation ............................................. . . . . . . . . . .3
Guarantee .................................................. . . . . . . .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
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
Changing 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. Retain 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 be carried out only by qualified experts.
Electrical installations and connections must be carried out only by an
electrician and in compliance with local regulations.
GUARANTEE
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
Modbus KNX
KNX bus
module
1
23
4
5
6

5© Vallox Oy - All rights reserved
INTRODUCTION
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.
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.
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 www.
techmanuals.info/
ValloxMV/ENG/
onlinehelp/webhelp
IMPORTANT
Prolonged overpressure
can result in damage
to the structures of the
building.

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 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 on the wall with a mounting plate, as shown
in the adjacent figure. 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 (E) onto the bars.
2. Lift the ceiling mounting plate in place.
3. Push a rubber damper (F) and a washer (G) 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
1
2
NOTE
When installing the unit,
reserve a space of at
least 555 mm in front
of the unit for servicing
purposes.

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 between the ceiling
mounting plate and the ventilation unit to the rear wall.
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
R model
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
L model
Inner diameter of the female collar: 125mm
1. Exhaust air flowing outdoors from the
unit
2. Outdoor air to the unit
3. Supply air from the unit to the
apartment
4. Extract air from the apartment to the
unit
1
5
3
6
8
9
10
7
2
4
A
B
~ 596
125
136,5
461,5
154,5
443,5
238 122
598
104
322
484
24
13
598
53
500
447

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.
CHANGING 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 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.
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
MAINTENANCE
MAINTENANCE
C
B
S
A
NOTE
The service space in
front of the ventilation
unit must be at least
555 mm.

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 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
If the unit has an
enthalpy cell, it must
not be washed. Only
aluminium or plastic
cells can be washed.
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, condensation runo can form rapidly.
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 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 wing screws used to fasten the fans (J) (3 screws
per fan).
8. Remove the fan from the unit by pulling it forward and by tilting
it slightly backwards at the same time.
9. Remove the mounting screws (K) (4 screws) of the air flow
control grille of the supply air fan and remove the grille. You
can now clean the fan. Put the control grille back in place after
cleaning.
10. Reassemble in reverse order after cleaning. Ensure that the
rubber feed throughs set in place when reinstalling the fan.
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

14
TECHNICAL SPECIFICATIONS
FAN INPUT POWER
Input power (total) (W)
Air flow (max) (dm/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
41 %
33 %
50 %
55 %
66 %
75 %
100 %
14 %
4 %
22 %
50
100
150
200
250
300
350
0 10 20 30 40 60 70 80 90 100
SFP 1,0
50
36 72 1080 144 180 216 252 288 324 360
SFP 1,5 SFP 1,8
m³/h
(l/s)
dm³/s
0 10 20 504030 60 70 80 90 100
dm³/s
(l/s)
m³/h
36 72 1080 144 180 216 252 288 324 360
4 % 14 % 22 %
33 % 41 %
50 %
55 %
66 %
75 %
100 %
50
100
150
200
250
0
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
98 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 ePM₁
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)
70 % A
82 %
1,0 kW (38 dm3/s) A
Dimensions (w x h x d) 598 x 447 x 596 mm Weight 50 kg
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 (%) 4 14 22 33 41 50 55 66 75 100 4 14 22 33 41 50 55 66 75 100
Air flow dm³/s 9 15 17 38 45 54 57 67 73 82 11 24 34 46 56 66 73 83 92 99
Air flow m³/h 31 54 61 136 162 193 206 243 264 296 41 88 123 164 200 237 261 299 329 357
Medium
frequency
of the
octave
band
Hz
63 56 58 63 67 70 72 75 77 79 80 62 53 56 58 61 64 67 68 70 71
125 52 62 63 65 67 69 71 74 76 78 52 58 58 61 64 67 69 70 73 74
250 44 52 57 64 70 66 70 71 72 74 35 45 50 57 60 60 62 62 62 63
500 40 49 53 58 61 64 65 69 71 74 27 34 40 44 48 51 53 55 57 62
1000 32 41 46 51 55 58 60 63 67 68 16 23 28 33 36 39 42 44 46 48
2000 24 34 40 47 51 55 57 61 63 65 14 17 23 29 32 36 38 41 43 44
4000 23 25 31 38 43 48 50 55 57 60 16 16 17 21 24 28 31 34 36 39
8000 21 21 23 30 35 41 44 51 53 56 20 20 20 20 20 21 22 24 26 29
LW, dB 58 64 67 71 74 75 78 80 82 84 62 59 61 64 67 69 72 73 75 77
LWA, dB (A) 41 50 54 60 64 65 67 70 73 75 39 43 45 50 54 55 57 58 59 62
Sound pressure level coming through the envelope of the unit in the room in which it is installed (10m² sound absorption)
Adjustment position / Air flows (supply/extract)
Adjustment position (%) 4 14 22 33 41 50 55 66 75 100
Air flow dm³/s 13/15 21/24 29/32 39/41 43/46 55/58 60/62 69/72 76/78 84/85
Air flow m³/h 47/54 76/86 104/115 140/148 155/166 198/209 216/223 248/259 274/281 302/306
LpA, dB (A) 21 26 30 36 38 42 43 46 48 50
SOUND VALUES

15 © Vallox Oy - All rights reserved
TECHNICAL SPECIFICATIONS
INTERNAL ELECTRICAL CONNECTION
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
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

16
TECHNICAL SPECIFICATIONS
Maximum ≤6W
MyVallox Control 1W
MyVallox RH% sensor 0.3W
MyVallox COsensor 1.2W
Voltage 24 VDC
POWER SUPPLY 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
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
MyVallox
Control
MyVallox
Control
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
1W
1W

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, or for preheating or cooling alone. If the radiator
is installed in the supply air duct, it can be used only for
preheating or cooling.
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.
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, ELV05006, Stig Wahlström).
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
1
1
3
5
67
2
8
10
9
13
1415
17
161819
20
21
11
12
4
22
23
24
25
26
27
NO. PART CODE NO. PART CODE NO. PART CODE
1. Supply / extract air fan 935450 11. HR cell bypass damper
assembly 4102523 21. RJ45 extension cable 952197
2. Supply air fan
attenuation grid 935451 12. Damper motor 930621 22. Connection box 3526700
3. Wall mounting plate 3080700 13. Post-heating resistor 942220 23. MyVallox Control panel 949033
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
EXPLODED VIEW AND PARTS LIST