BLAUBERG VENTO Expert A50-1 Pro User manual

VENTO Expert A50-1 Pro
VENTO Expert A50-1 S Pro
HEAT RECOVERY SINGLE ROOM UNIT WITH
HEAT AND HUMIDITY RECOVERY
OPERATION MANUAL
EN

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VENTO Expert A50-1 Pro
CONTENTS
Introduction 3
General 3
Safety regulations 3
Transportation and storage regulations 3
Manufacturer's warranty 3
Unit design and functional priciple 4
Modications and options 6
Delivery set 6
Technical data 6
Mounting 7
Connection to power grid 12
Unit setup 13
Unit control 15
Technical maintenance 17
Troubleshooting 19
Acceptance certicate 20
Connection certicate 20
Warranty card 20

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VENTO Expert A50-1 Pro
BLAUBERG Company is pleased to present our reversing single-room air
handling unit with heat and humidity recovery VENTO Expert A50-1 Pro /
VENTO Expert A50-1 S Pro.
INTRODUCTION
The present operation manual contains a technical description, technical
data sheets, operation and mounting guidelines, safety precautions and
warnings for safe and correct operation of the unit.
GENERAL
The single-room unit is designed for ecient energy saving supply and
exhaust ventilation of ats, houses and other small premises.
The heat recovery technology is used to minimize ventilation heat losses.
The unit is equipped with a high-tech ceramic heat exchanger that
provides the utilization of exhaust air heat energy for warming up the ltered
supply air ow. The heat recovery eciency of the heat exchanger is up to
97 %.
The unit is designed for indoor application with the ambient temperature
ranging from -30 °C up to +50 °C and relative humidity up to 80 %.
The unit is designed for mounting through walls.
The unit is rated for continuous operation.
The unit is allowed for operation only after nal mounting that includes
installation of protecting devices in compliance with DIN EN ISO 13875 (DIN
EN ISO 12100) as well as other construction safety equipment.
The unit design is constantly being improved, so some models can slightly
dier from those ones described in this operation manual.
SAFETY REGULATIONS
The unit complies with the requirements according to the EU norms
and directives, to the relevant EU-Low Voltage Equipment Directives, EU-
Directives on Electromagnetic Compatibility.
All operations related to the unit electrical connections, servicing and
repair operations are allowed only after disconnecting the unit from the
power grid.
All mounting and servicing operations should be performed by duly
qualied electricians with valid electrical work permit for works with electrical
devices powered from AC up to 1000 V and after careful study of the present
operation manual.
Please follow the safety regulations and working instructions (DIN EN 50
110, IEC 364).
Make sure the impeller and the casing are not damaged before connecting
the unit to power supply. The casing internals must be free of any foreign
objects which can damage the impeller blades or the motor.
The unit maintenance and repair are allowed only after power cut-o and
full stop of the rotating parts.
Misuse of the unit or any unauthorized modication are not allowed.
The unit is designed for connection to AC single-phase power grid in
compliance with the“Technical data”section.
The unit is rated for continuous operation under permanent power
supply.
Measures should be taken to prevent smoke, carbon monoxide and
other combustion products into the room through open ues or other re-
protection devices, as well as to eliminate the possibility of backow of gas
from devices that use gas or open ame.
The maximum permitted pressure dierence per living units is 4 Pa.
The transported air must not contain any dust or other solid impurities as
well as sticky substances or brous materials.
The unit is not rated for operation in a ammable or explosive medium.
Do not close or block the unit air inlet or outlet vent not to disturb the
normal air passage.
Do not sit on the unit and do not put any objects on it.
When the unit generates unusual sounds, odour or emits smoke
disconnect it from power supply and contact the distributor.
Full the operation manual requirements to ensure a trouble-free and
long service life of the unit.
Ingress Protection (IP) rating from solid objects and liquids IP 24.
TRANSPORTATION AND STORAGE REGULATIONS
Transportation of the unit is allowed by any vehicle provided the unit is
transported in the original package and is protected against weather and
mechanical damages.
Use hoist machinery for handling and transportation to prevent possible
mechanical damages.
Full the requirements for transportation of the specied cargo type
during cargo-handling operations.
Store the unit in a dry and cool place in the original packing.
The storage environment must not be subjected to any aggressive and/
or chemical evaporations, admixtures, foreign objects that may provoke
corrosion and damage connection tightness.
Store the unit in an environment with minimized risk of mechanical
damages, temperature and humidity uctuations.
Do not expose the unit to the temperatures below +5 °C and above +40
°C .
Connection of the unit to power supply is allowed after the appliance has
been kept indoors for minimum two hours.
MANUFACTURER’S WARRANTY
The unit complies with the requirements according to the EU norms
and directives, to the relevant EU-Low Voltage Equipment Directives, EU-
Directives on Electromagnetic Compatibility.
We hereby declare that the unit complies with the essential protection
requirements of Electromagnetic Council Directive 2004/108/EC, 89/336/EEC
and Low Voltage Directive 2006/95/EC, 73/23/EEC and CE-marking Directive
93/68/EEC on the approximation of the laws of the Member States relating
to electromagnetic compatibility, which relate to electrical appliances used
in set voltage classes.
The manufacturer hereby warrants normal operation of the unit over
the period of two years from the retail sale date provided observance of the
installation and operation regulations.
In case of a failure due to a manufacturing fault during the warranty
period the consumer has the right to exchange it.
In the event that the purchase date stamp is not available warranty period
is calculated from the manufacturing date.
The replacement is oered by the distributor.
The MANUFACTURER is not responsible for any damage resulting from
any misuse of or gross mechanical interference with the unit.
Full the operation manual requirements to ensure a trouble-free and
long service life of the unit.
WARNING
Do not dispose in domestic waste.
The unit contains in part materials that
can be recycled and in part substances that
should not end up as domestic waste.
Dispose of the unit once it has reached
the end of its working life according to the
regulations valid in your country.
WARNING
The unit is not allowed for use by children and persons
with reduced physical, mental or sensory capacities, with-
out proper practical experience or expertise, unless they are
controlled or instructed on the product operation by the
person(s) responsible for their safety.
Children must be under adult supervision in order to
avoid playing with the product.

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UNIT DESIGN AND OPERATING LOGIC
The ventilator consists of an indoor assembly unit with a decorative front
panel, a cartridge, an air duct, a sound absorbing material and an outer
ventilation hood.
The cartridge is the basic functioning part of the ventilator.
The cartridge consists of the fan, the heat exchanger and two lters that
ensure rough air ltration and prevent ingress of dust and foreign objects
into the heat exchanger and the fan.
The indoor assembly unit is equipped with automatic shutters that close
during the ventilator standstill and prevent uncontrolled air backow.
The outer ventilation hood is used to prevent direct ingress of water and
other objects to the ventilator.
Round duct Ø 160 mm is made of plastic and is 500 mm long.
The unit is equipped with a high-tech ceramic heat exchanger with heat
recovery eciency up to 97 %.
Due to the cellular structure is has larger contact surface and higher
eciency.
The unit is featured with excellent heat-conducting properties and
thermal energy storage capacity.
The ceramic heat exchanger uses the heat energy contained in the
exhaust air to heat supply air.
Air is supplied and extracted with an axial reversible EC-fan with low
energy demand.
The motor has overheating protection and ball bearings for longer
service life.
The front panel incorporates an operating LED indicator.
During the night the indicator light intensity drops down.
Fig. 1. Unit design
Front part of the indoor assembly unit
Fulls the decorative function.
The design enables blocking of the air duct
in case of an extended outage of the ventilator.
Back part of the indoor assembly unit
The assembly unit includes a circuit board and basic
control units located on the side of the indoor assembly unit.
Cartridge
An assembly unit consists of the fan, the heat
exchanger and the lters. Generates air ow,
provides energy recovery and air cleaning.
Air duct
A plastic air duct.
Sound-absorbing material
A layer of sound-absorbing material for attenuation
of noise generated during the ventilator operation.
Outer ventilation hood
Prevents ingress of water and foreign objects
into the ventilator. Each ventilator model has
a matching ventilation hood model.
Filter
Cleans the air owing through the ventilator
of dust and foreign objects. Prevents
contamination of the heat exchanger.
Fan
Generates air ow.
Heat exchanger
Provides extract air energy
regeneration for warming
up of supply air ow.
Cartridge is a solid block consisting of the fan, the heat
exchanger and the lters.
The lters are easy removable for technical maintenance.
CARTRIDGE DESIGN

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VENTO Expert A50-1 Pro
The shutters are closed The shutters are opened
The indoor assembly unit is equipped with automatic shutters. During the ventilator operation the automatic shutters are opened and let the air ow freely
through the ventilator. The design enables blocking of the air duct in case of an extended outage of the ventilator.
AUTOMATIC SHUTTERS OPERATION
VENTILATOR OPERATION MODES
The ventilator has two operation modes:
Ventilation. The ventilator operates either in extract or supply mode at a set speed.
Regeneration. The ventilator operates in reversible mode with heat and humidity recovery.
In Regeneration mode the ventilator operates in two cycles, 70 seconds each.
Cycle I.
As warm stale extract air ows through the heat exchanger, it heats up and moisturizes the heat exchanger and transfers up to 97 % of heat energy.
Cycle II.
Fresh intake air from outside ows through the ceramic heat exchanger, absorbs accumulated moisture and is heated up to the room temperature. In 70
seconds as the ceramic heat exchanger gets cooled down, the ventilator is switched to air extract mode and the cycle is renewed.
AIR EXTRACTION
AIR SUPPLY
+20˚ С
-7˚ С
+20˚ С
-7˚ С
+17˚ С
-10 ˚ С
+17˚ С
-10 ˚ С
70 sec.
70 sec.
19.4 ˚ F
19.4 ˚ F
14 ˚ F
14 ˚ F
62.6 ˚ F
62.6 ˚ F
68 ˚ F
68 ˚ F

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MODIFICATIONS AND OPTIONS
VENTO Expert A50-1 Pro
Unit for 250 up to 490 mm walls.
VENTO Expert A50-1 S Pro
Unit for 120 up to 490 mm walls.
DELIVERY SET
Indoor assembly unit of the ventilator - 1 item
Air duct - 1 item
Sound-absorbing material - 1 item
Cartridge assembly - 1 item
Outer ventilation hood - 1 item
Remote control - 1 item
Cardboard mounting plate - 1 item
Mounting kit - 1 item
Operation manual - -1 item
Packing box - 1 item
ATTENTION!
Make sure the unit has no visible transport damages while accepting the goods. Check the ordered and the delivered goods for
compliance.
Fig. 2. VENTO Expert A50-1 Pro Fig. 3 VENTO Expert A50-1 S Pro
TECHNICAL DATA
Table 1. Unit technical data
Parameters VENTO Expert A50-1 Pro / VENTO Expert A50-1 S Pro
Unit voltage [V /50-60 Hz] 1~100-240
Speed 1 2 3
Total unit power [W] 3.61 4.15 5.2
Total unit current [A] 0.025 0.030 0.039
Max. air capacity [m3/h] 15 30 50
Sound pressure level at 1 m distance [dB(A)] 20 27 30
Sound pressure level at 3 m distance [dB(A)] 11 18 21
Outdoor noise attenuation [dB(A)] 42
Max. transported air temperature [°C] from -30 up to +50
Heat recovery eciency [%] 97 90 82
Heat exchanger type ceramic heat exchanger
Index of protection IP24

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VENTO Expert A50-1 Pro
MOUNTING
WARNING
Read the operation manual prior to any electric installations. Connection of the unit to power grid is allowed only by qualied professionals.
The unit is designed for through-the-wall mounting in the building outer
wall.
Mounting sequence:
1. Prepare a round core hole in the outer wall. The core hole size is shown
in the gure 5. While preparing a core hole it is recommended to make
preparations for layout of the power cable and other required cables.
Fig. 5.
280
234
284
240-500
64
160
0
03
234
284
64
160
310
260
150-500
Fig. 4. Overall dimensions
Ø 180
min 500
min 500
min 500
VENTO Expert A50-1 Pro Vento Expert A50-1 S Pro

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VENTO Expert A50-1 Pro
Fig. 6.
Fig. 7.
Fig. 8.
2. Insert the air duct in the wall.
The telescopic air duct end must protrude for the distance A that enables
installation of the outer ventilation hood (see Fig. 6).
Install the air duct in the wall in such a way so it protrudes from the wall
surface for maximum 3 mm or is ush with the wall.
Install the air duct with the minimum 3° slope downwards.
3. Stick the delivered cardboard master plate on the indoor wall using a
mounting tape. The large opening in the master plate must be axially aligned
with the air duct. For aligning of the master plate with respect to the horizon
line it is recommended to use a builder’s level. Then mark the fastening holes
for installation of the supplied dowels and drill the holes to a required depth.
Route the power cable from the ventilator outside through the specially
marked opening on the master plate.
4. Unlatch the front part of the indoor assembly unit from its back part by pressing the side tabs. While installing the front panel the thermal actuator rod
must be in low position.
0 - 3 mm A
Fill the gaps between the wall
and the telescopic air duct with
a mounting foam
min 3 °
Model А, mm
VENTO Expert A50-1 Pro
0-10 (0”-3⁄8")
VENTO Expert A50-1 S Pro
10-110 (3⁄8"-4 5⁄16")
While installing the front panel
the thermal actuator rod
must be in low position

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VENTO Expert A50-1 Pro
Fig. 9.
Fig. 10.
Fig. 11.
5. Fix the back part of the indoor assembly unit on the wall with the screws
supplied with the mounting kit of the ventilator. Remove the two retaining
screws from the left transparent cover to enable access to the terminals.
6. Route the power cable (see Fig. 10) and connect the ventilator to power
mains in compliance with the external wiring diagram (see Fig. 16). Fix the
power cable and the signal cables with a cable clamp. After completion of the
electrical connection re-install the transparent cover in site.
7. 7. Insert the cartridge into the air duct (see Fig. 11). The pointer must be
directed upwards. Then x the wire with the protruding clamp and connect
the socket connector to the circuit board.
Cable clamp Cable clamp
Insert the wires under the cable
clamp and connect the socket
connector to the circuit board
The pointer must be
directed upwards

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8. Mark the fastening holes for the outer ventilation hood:
• Fig. 12a - for VENTO Expert A50-1 Pro model.
• Fig. 12b - for VENTO Expert A50-1 S Pro model.
Drill 40 mm holes for the dowel 6x40. Insert the 6x40 dowels from the delivery set into the holes.
Fig. 12а. Fig. 12b.
9. Disassemble the outer ventilation hood to enable access to the fastening holes.
• Fig. 13a - for VENTO Expert A50-1 Pro model. Take o the front part of the outer ventilation hood.
• Fig. 13b - for VENTO Expert A50-1 S Pro model. Remove 5 screws and take o the front part of the ventilation hood.
Fig. 13а. Fig. 13b.
1 2
Screws
10. Fix the back part of the outer hood on the wall:
• Fig. 14a - for VENTO Expert A50-1 Pro model. Connect the back part of the ventilation hood with the wall using the 4x40 screws from the delivery set.
• Fig. 14b - for VENTO Expert A50-1 S Pro model. Connect the back part of the ventilation hood with the wall using the 4x40 screws from the delivery set.
Fig. 14а.
200 mm
(7 ")
Ø6 mm (¼")
4 holes
220 mm
(8 ")
200 mm
(7 ")
Ø6 mm (¼")
4 holes
220 mm
(8 ")

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VENTO Expert A50-1 Pro
Fig. 14b.
Screws
11. Install the front part of the ventilation hood.
• Fig. 15a - for VENTO Expert A50-1 Pro model.
• Fig. 15b - for VENTO Expert A50-1 S Pro model.
Fig. 15а. Fig. 15b.

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VENTO Expert A50-1 Pro
The unit is rated for connection to a single-phase AC with a voltage of
100-240 V / 50-60 Hz.
The routing of the power and signal cables is shown in“Mounting”section.
For electric installations use insulated, durable and heat-resistant electric
leads (cables, conductors) with the minimum cross section 0.75 mm2for the
power cable and 0.25 mm2for the signal cables.
The cable cross-section is given for reference only.
The signal cable must be shielded.
The actual conductor cross-section selection must be based on its type,
the maximum permissible heating, insulation, length and installation method.
Use copper wires for all the electric connections!
Connect the unit to power grid via the terminal block installed in the
control circuit in compliance with wiring diagram and terminal designation.
Connect the unit to power mains through the external automatic switch
with a magnetic trip integrated into the xed wiring system.
The trip current of the automatic switch must exceed the ventilator
current consumption, refer to Table 1.
The ventilator design enables connecting any external controls with
a normally opened contact (NO-contact), such as an external CO2 sensor,
humidity sensor, relay switch, etc.
When the contacts NO1 and NO2 are closed the ventilator switches to
maximum speed.
Several ventilators may be in series or parallel connected to power mains
with a central control by the master ventilator.
In case of in-series or parallel connection of several ventilators power is
supplied either from a previous ventilator or from power grid.
CONNECTION TO POWER MAINS
WARNING
Connection of the unit to power grid is allowed by a qualied electrician only after reading the operation manual prior to
any electric installations.
The rated electrical parameters are stated on the rating plate.
Any tampering with the internal connections is prohibited and will void the warranty.
Connect the unit only to power mains with valid electric standards.
The unit must be connected to a correct mounted socket with a grounded terminal or connected to a xed installed cable.
Follow the respective electric standards, safety rules (DIN VDE 0100), TAB der EVUs.
The house cabling system must be equipped with a magnetic trip automatic switch at the external input. The contact gap
on all poles must be at least 3 mm (VDE 0700 T1 7.12.2 / EN 60335-1).
Enable quick access to an automatic switch installation place.
N
L
N
L
In
Gnd
Gnd
Out
NO1
NO2
+12V
Power output
100-230 V / 50-60 Hz
Power input
100-230 V / 50-60 Hz
Control signal input
from a previous ventilator
Control signal output
to next ventilator
NO-contact for connection
of external controls
Fig. 16. External wiring diagram

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VENTO Expert A50-1 Pro
Prior to operating the ventilator set up the ventilator using the DIP-switch. It is
located on the controller circuit board.
To access the DIP-switch take o the front panel of the indoor assembly unit
and uplift the rubber plug that covers the switch.
Fig. 17. DIP-switch
Master Slave 1 Slave N
N
L
N
L
In
Gnd
Gnd
Out
NO1
NO2
+12V
N
L
N
L
In
Gnd
Gnd
Out
NO1
NO2
+12V
N
L
N
L
In
Gnd
Gnd
Out
NO1
NO2
+12V
Power input
100-240 V / 50-60 Hz
to the next unit
Master Slave 1 Slave N
N
L
N
L
In
Gnd
Gnd
Out
NO1
NO2
+12V
N
L
N
L
In
Gnd
Gnd
Out
NO1
NO2
+12V
N
L
N
L
In
Gnd
Gnd
Out
NO1
NO2
+12V
Power input
100-240 V / 50-60 Hz
to the next unit
WIRING DIAGRAM FOR INSERIES CONNECTION
WIRING DIAGRAM FOR PARALLEL CONNECTION
Open the rubber plug
DIP-switch under the plug
12345678
UNIT SETUP

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Table 2. DIP-switch Positioning
Position Function
1
Turning the unit o is allowed.
The switch position enables deactivation of the unit with the button on the side control panel.
1
Turning the unit o is forbidden.
The switch position disables deactivation of the unit with the button on the side control panel.
Fan rotation direction.
For controlled ventilation it is recommended to install the units pairwise and integrate them in a group using a signal cable. Set one half of the connected
units into supply mode and the other half into extract mode.
2
Air supply.
This positioning of the switch enables supply operation of the unit in Ventilation mode. In Regeneration mode the unit starts
operating rst in supply mode.
2
Air extract.
This positioning of the switch enables extract operation of the ventilator in Ventilation mode. In Regeneration mode the
ventilator starts operating rst in extract mode.
Humidity sensor setpoint.
The humidity sensor measures the extract air humidity. If the extract air humidity is above the set point, the ventilator switches to Speed III. As humidity drops
down to the set point, the ventilator changes to pre-set speed after elapsing of the time set on the delay timer.
345
Humidity control is OFF
345
Humidity setpoint 40 %
345
Humidity setpoint 50 %
345
Humidity setpoint 60 %
345
Humidity setpoint 70 %
345
Humidity setpoint 80 %
Delay timer.
During activation of the humidity sensor or any other control unit the unit switches to higher speed. After standardization of the indoor humidity or any other
air parameters the unit returns to a previously set mode after set time period.
67
Time delay 0 min
67
Time delay 5 min
67
Time delay 15 min
67
Time delay 30 min

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VENTO Expert A50-1 Pro
The ventilator can be operated with the remote control or the control
buttons on the side part of the indoor assembly unit, as gured below.
In case of in-series or parallel connection the signal from a control unit is
received by the rst ventilator (Master) only.
UNIT CONTROL
Turning ventilator ON/OFF
Activation of Speed III
for 4 hours
Activation of Speed I
for 8 hours
Speed selection
Ventilation mode
The ventilator operates either in
extract or supply mode at set speed
depending on positioning of the
DIP-switch on the circuit board.
Filter indicator
After the set lter replacement
periodicity has expired the Filter
indicator starts glowing.
In this case clean or replace the
lters.
Alarm indicator
In case of the motor jam the Alarm
indicator starts glowing and the
ventilator stops. All the connected
in series ventilators stop
synchronously.
Master indicator
Indicator of the rst ventilator in
the group.
Recovery mode
Air ow direction changes once in
70 seconds and the ventilator
changes between supply and extract
mode. Heat recovery is performed
in this mode.
Speed/o
The speed setting engages cyclically:
I-II-III-O.
During speed setting the respective
light turns on.
Buttons on the ventilator casing Remote control
Filter
Alarm
Master
Speed
OFF
Fig. 18. Unit control
Air ow blocking.
Press the front panel gently to cut o the air duct. The unit will turn o.
To open the air duct pull the front panel while holding the special grooves.
The unit reverts to the pre-set operation mode that was active before the air
duct shut-o.
Air duct shut-o Air duct opening
Fig. 19. Air ow shut-o

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WARNING
Disconnect the unit from power supply before any maintenance operations.
TECHNICAL MAINTENANCE
Maintenance of the unit means regular cleaning of the ventilator surfaces of dust and cleaning or replacement of the lters.
To access the basic assembly units follow the steps:
1. Press the latches on the side of the indoor assembly unit to take o the front part. When re-installing the front panel the thermal actuator rod must be
down. If it is uplifted, wait until it goes down about 2 minutes.
2. Disconnect the socket from the circuit board. While removing the socket do not pull the cable. Uplift it with a at screw driver of a respective size.
3. Pull the cord to remove the cartridge from the air duct. Remove the lters from the cartridge.
When re-installing the front
panel the thermal actuator
rod must be down
Disconnect the socket from
the circuit board
Use a at screwdriver to
disconnect the socket
Do not pull the wires!

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VENTO Expert A50-1 Pro
Cleaning of the lters.
Clean the lters as they get soiled, but not less than once in three months. After the set lter replacement periodicity has expired the Filter indicator starts
glowing. The lter timer is reset once the cartridge socket is disconnected from the circuit board. Wash the lters and let them get dry. Install dry lters in the air
duct. Vacuum cleaning is allowed. The lter rated service life is 3 years.
For new lters contact your distributor.
Cleaning of the heat exchanger.
Some dust may accumulate on the heat exchanger block even in case of regular maintenance of the lters. Clean the heat exchanger regularly to ensure its
high heat recovery eciency. Vacuum clean the heat exchanger not less than once a year.
Replacement of the remote control battery (if necessary).
In case of a long operation of the remote control the battery must be replaced. If the ventilator does not respond to the commands from the remote control
it is a signal to replace the battery. Battery type: CR2025. To replace the battery of the remote control remove the battery holder with a battery.
Replace the battery and install the holder with a new battery back to the remote control.
+
CR2025
3V
+
CR2025
3V
1 2
Outer ventilation hood maintenance (once per year).
The ventilation hood may get clogged with leaves and other objects which may reduce the unit performance. Check the ventilation hood twice per year
and clean it as often as required.

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Fault Possible reasons Troubleshooting
When switching on the
unit the fan does not
start.
No power supply. • Make sure the power supply line is connected correctly,
otherwise troubleshoot the connection error.
The motor is jammed, the impeller blades are soiled.
• Turn the unit o.
• Troubleshoot the motor jam and the impeller clogging.
• Clean the blades.
• Restart the unit.
Automatic switch tripping
following the unit turning
on.
Overcurrent as a result of short circuit in the electric line. • Turn the unit o.
• Contact the distributor.
Low air ow.
Low set fan speed. • Set higher speed.
The lter, the fan or the heat exchanger is soiled.
• Clean or replace the lter.
• Clean the fan and the heat exchanger.
• For the heat exchanger and the lter maintenance, refer to
page 17.
Noise, vibration.
The impeller is soiled. • Clean the impeller.
Loose screw connection of the unit casing or the outer
ventilation hood.
• Tighten the screws of the unit or the outer ventilation
hood.
TROUBLESHOOTING

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VENTO Expert A50-1 Pro
Heat recovery single room unit with heat and humidity recovery
is recognized as serviceable.
The unit complies with the requirements according to the EU norms and directives, to the relevant EU-Low Voltage Equipment Directives, EU-Directives
on Electromagnetic Compatibility.
We hereby declare that the unit complies with the essential protection requirements of Electromagnetic Council Directive 2004/108/EC, 89/336/EEC and
Low Voltage Directive 2006/95/EC, 73/23/EEC and CE-marking Directive 93/68/EEC on the approximation of the laws of the Member States relating to electro-
magnetic compatibility, which relate to electrical appliances used in set voltage classes.
This certicate is issued following test carried out on samples of the product referred to above.
Quality Inspector’s Stamp Manufacture Date ____________________
Company:
Expert’s Full Name
Date Signature
Heat recovery single room unit with heat and humidity recovery
VENTO Expert A50-1 Pro VENTO Expert A50-1 S Pro
is connected to power mains in compliance with the operation manual requirements by the professional:
SELLER
PURCHASE DATE
REPRESENTATIVE IN EU
BLAUBERG Ventilatoren GmbH
Aidenbachstr. 52a,
D-81379 Munich, Germany
ACCEPTANCE CERTIFICATE
CONNECTION CERTIFICATE
WARRANTY CARD
VENTO Expert A50-1 Pro VENTO Expert A50-1 S Pro
VENTO Expert A50-1 Pro VENTO Expert A50-1 S Pro

www.blaubergventilatoren.de
VENTO Expert A50-1 Pro / v.4 (2 / EN