Vents-us TwinFresh Expert Duo RW1-30 User manual

TwinFresh Expert RW1 -50
TwinFresh Expert Duo RW1 -30
Single-room reversible energy recovery ventilator
USER’S MANUAL

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www.ventilation-system.com
Safety requirements..................................................................................................................................................................... 2
PURPOSE............................................................................................................................................................................................. 6
Delivery set........................................................................................................................................................................................ 7
Designation key.............................................................................................................................................................................. 7
Technical data.................................................................................................................................................................................. 8
Design and functioning ............................................................................................................................................................ 9
Mounting and set-up.................................................................................................................................................................. 11
Connection to power mains and control....................................................................................................................... 14
Technical maintenance.............................................................................................................................................................. 30
Troubleshooting............................................................................................................................................................................. 32
Storage and transportation regulations.......................................................................................................................... 32
Manufacturer’s warranty........................................................................................................................................................... 33
Certificate of acceptance.......................................................................................................................................................... 35
Seller information.......................................................................................................................................................................... 35
Installation certificate.................................................................................................................................................................. 35
Warranty card................................................................................................................................................................................... 35
This user’s manual is a main operating document intended for technical, maintenance, and operating staff.
The manual contains information about purpose, technical details, operating principle, design, and installation of the
TwinFresh Expert (Duo) RW1 unit and all its modifications.
Technical and maintenance staff must have theoretical and practical training in the field of ventilation systems and should be able to
work in accordance with workplace safety rules as well as construction norms and standards applicable in the territory of the country.
The information in this user’s manual is correct at the time of the document’s preparation.
The Company reserves the right to modify the technical characteristics, design, or configuration of its products at any time in order to
incorporate the latest technological developments.
No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means in any information
search system or translated into any language in any form without the prior written permission of the Company.
CONTENTS
SAFETY REQUIREMENTS
• Please read the user’s manual carefully prior to installing and operating the unit.
• All user’s manual requirements as well as the provisions of all the applicable local and national
construction, electrical, and technical norms and standards must be observed when installing
and operating the unit.
• The warnings contained in the user’s manual must be considered most seriously since they
contain vital personal safety information.
• Failure to follow the rules and safety precautions noted in this user’s manual may result in an
injury or unit damage.
• Read and save these instructions.
• While transferring the unit control, the user’s manual must be turned over to the receiving
operator.
• After a careful reading of the manual, keep it for the entire service life of the unit.

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UNIT INSTALLATION AND OPERATION SAFETY PRECAUTIONS
• The unit must be grounded!
• Do not bend the power cable.
• Avoid damaging the power cable.
• Do not put any foreign objects on the power cable.
• Do not use damaged equipment or cables when connecting
the unit to power mains.
• Do not touch the unit controls with wet hands.
• Do not carry out the installation and maintenance operations
with wet hands.
• Do not allow children to operate the unit.
• Do not store any explosive or highly ammable substances in
close proximity to the unit.
• Do not open the unit during operation.
• Do not block the air duct when the unit is switched on.
• Do not sit on the unit and avoid placing foreign objects on it.

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• Unpack the unit with care.
• While installing the unit, follow the safety regulations specic
to the use of electric tools.
• Do not lay the power cable of the unit in close proximity to
heating equipment.
• Do not operate the unit outside the temperature range stated
in the user's manual.
• Do not operate the unit in aggressive or explosive
environments.
• Do not wash the unit with water.
• Protect the electric parts of the unit against ingress of water.
• Disconnect the unit from power mains prior to any technical
maintenance.
• When the unit generates unusual sounds, odor, or emits
smoke,disconnectitfrompowersupplyandcontacttheSeller.
• Do not direct the air ow produced by the unit towards open
ame or ignition sources.
• In case of continuous operation of the unit, periodically check
the security of mounting.
THE PRODUCT MUST BE DISPOSED SEPARATELY AT THE END OF ITS SERVICE LIFE.
DO NOT DISPOSE THE UNIT AS UNSORTED DOMESTIC WASTE.

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THE UNIT SHOULD NOT BE OPERATED BY CHILDREN OR PERSONS WITH
REDUCED PHYSICAL, MENTAL, OR SENSORY CAPACITIES, OR THOSE WITHOUT
THE APPROPRIATE TRAINING.
THE CHOICE OF UNIT INSTALLATION LOCATION MUST PREVENT UNAUTHORIZED
ACCESS BY UNATTENDED CHILDREN.
USE THIS UNIT ONLY IN THE MANNER INTENDED BY THE MANUFACTURER. IF YOU
HAVE QUESTIONS,CONTACT THE MANUFACTURER.
BEFORE SERVICING OR CLEANING UNIT, SWITCH POWER OFF AT SERVICE PANEL
AND LOCK THE SERVICE DISCONNECTING MEANS TO PREVENT POWER FROM
BEING SWITCHED ON ACCIDENTALLY. WHEN THE SERVICED IS CONNECTING
MEANS CANNOT BE LOCKED, SECURELY FASTEN A PROMINENT WARNING
DEVICE, SUCH AS ATAG, TO THE SERVICE PANEL.
READ THE USER'S MANUAL BEFORE INSTALLING THE UNIT.
INSTALLATION WORK AND ELECTRICAL WIRING MUST BE DONE BY QUALIFIED
PERSONS.
WHEN CUTTING OR DRILLING INTO WALL OR CEILING, DO NOT DAMAGE
ELECTRICAL WIRING AND OTHER HIDDEN UTILITIES.
DO NOT MOUNT ROOMTOROOM FAN IN A FIRERATED WALL.
POWER OFF THE POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
THE UNIT MUST BE CONNECTED TO POWER SUPPLY BY A QUALIFIED
ELECTRICIAN.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE
MANUFACTURER’S LABEL.
ANY TAMPERING WITH THE INTERNAL CONNECTIONS IS PROHIBITED
AND WILL VOID THE WARRANTY.
INSTALLATION ONLY BY EXPERTS AND ONLY IN ACCORDANCE WITH
LOCAL REQUIREMENTS AND NATIONAL ELECTRICAL CODE
WARNING – TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS, OBSERVE THE FOLLOWING:

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The unit is designed to ensure continuous mechanical air exchange in houses, offices, hotels, cafes, conference halls, and other utility and
public spaces as well as to recover the heat energy contained in the air extracted from the premises to warm up the filtered stream of
intake air. The unit is not intended for organizing ventilation in swimming pools, saunas, greenhouses, summer gardens, and other spaces
with high humidity. Due to the ability to save heating energy by means of energy recovery, the unit is an important element of energy-
efficient premises. The unit is a component part and is not designed for stand-alone operation. It is rated for continuous operation.
Transported air must not contain any flammable or explosive mixtures, evaporation of chemicals, sticky substances, fibrous materials,
coarse dust, soot and oil particles or environments favourable for the formation of hazardous substances (toxic substances, dust,
pathogenic germs).
CAUTION!
FOR GENERAL VENTILATING USE ONLY.
DO NOT USE TO EXHAUST HAZARDOUS OR EXPLOSIVE MATERIALS AND VAPORS
AS WELL AS FLAMMABLE MIXTURES, EVAPORATION OF CHEMICALS, STICKY
SUBSTANCES, FIBROUS MATERIALS, COARSE DUST, SOOT AND OIL PARTICLES
OR ENVIRONMENTS FAVOURABLE FOR THE FORMATION OF HAZARDOUS
SUBSTANCES TOXIC SUBSTANCES, DUST, PATHOGENIC GERMS.
FOR USE IN NON FIRE RATED INSTALLATIONS ONLY.
FOR USE IN ONE AND TWOFAMILY DWELLINGS ONLY.
PURPOSE
DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE
ANY MAINTENANCE OPERATIONS!
FOLLOWING THE REGULATIONS STIPULATED HEREIN WILL ENSURE A LONG AND
TROUBLEFREE OPERATION OF THE UNIT.
USER’S WARRANTY CLAIMS SHALL BE SUBJECT TO REVIEW ONLY UPON
PRESENTATION OF THE UNIT, THE PAYMENT DOCUMENT AND THE USER’S
MANUAL WITH THE PURCHASE DATE STAMP.

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Name TwinFresh Expert RW1 TwinFresh Expert Duo RW1
Indoor unit of the ventilator 1 pc. 1 pc.
Air duct 1 pc. 1 pc.
Air flow separator – 3-6 pcs.
Sound-absorbing material 1 pc. –
Assembled cartridge 1 pc. 1 pc.
Outer ventilation hood 1 pc. 1 pc.
Remote control 1 pc. 1 pc.
Cardboard template 1 pc. 1 pc.
USB-A - USB mini cable 1 pc. 1 pc.
Mounting kit 2 packs 2 packs
Foam wedges 1 set 1 set
User's manual 1 pc. 1 pc.
Mounting hood installation instruction 1 pc. 1 pc.
Packing box 1 pc. 1 pc.
TwinFresh Expert R W 1 -50 L
Air duct length
_ – 500 mm
L – 700 mm
Rated air ow [m3/h]
Front panel modication
1 – flat front panel
Automation availability
W – wireless connection of the units
Air duct cross section
R – round
Ventilator series
Expert – 1 fan
Expert Duo – two fans
DELIVERY SET
DESIGNATION KEY

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The unit is rated for indoor application with the following conditions:
• Temperature ranging from -15 °C (5 °F) up to +40 °C (+104 °F) and relative humidity up to 50 % for TwinFresh Expert RW1
units.
• Temperature ranging from -15 °C (5 °F) up to +40 °C (+104 °F) and relative humidity up to 65 % for TwinFresh Expert Duo
RW1 units.
The unit is rated as a class II electric appliance.
Ingress protection rating against access to hazardous parts and water ingress is IP22.
The unit design is constantly being improved, thus some models may be slightly different from those described in this manual.
Technical specifications of the particular model are indicated on the unit casing.
A – protruding part of the air duct on the outer wall. Depends on the selected
ventilation hood type.
L – cartridge length, depends on the ventilator model.
The supplied air duct length and the supplied ventilation hood model
depends on the ventilator model, refer to the Designation Key section, page 7.
The overall and connecting dimensions of the outer ventilation hood, the
outside protrusion length of the air duct A and the mounting sequence of
the hood are stated in its installation instruction.
The overall dimensions of the front panel are stated below.
OVERALL DIMENSIONS OF THE INDOOR UNIT [mm] (inch)
68
(2 11/
16
")
235
(9 1/4")
285
(11 1/4")
207
(8 1/8")
85
(3 3/8")
137
(5 3/8")
138
(5 7/16")
207
(8 1/8")
85
(3 3/8")
137
(5 3/8")
138
(5 7/16")
TwinFresh Expert TwinFresh Expert Duo
Длина воздуховода (толщина стены)
A A
LL
Air duct length
Wall thickness
Wall thickness is above the minimum Wall thickness is minimal
Outer ventilation
hood
Front panel Front panel
Cartridge Cartridge
Air duct length
Wall thickness
Outer ventilation
hood
Ventilator model L, [mm]
TwinFresh Expert RW1-50 250
TwinFresh Expert Duo RW1 -30 280
TECHNICAL DATA
Wi-Fi technical data
Standard IEFE 802,11, b/g/n
Frequency band [GHz] 2.4
Transmission power [mW] (dBm) 100(+20)
Network DHCP
WLAN safety WPA, WPA2

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Filters
Clean the air flowing through
the ventilator of dust and
foreign objects.
Prevent contamination of the
regenerator.
Front part of the indoor unit with a front panel
Fulfils the decorative function. The design enables to
shut off the air duct in case of an extended downtime of
the ventilator.
The front part of the TwinFresh Expert Duo unit is used
for air filtration.
Back part of the indoor unit
The unit includes a circuit control board and basic controls located on the side part.
Back part of the indoor unit
The unit includes a circuit control board and
basic controls located on the side part.
TwinFresh Expert Duo cartridge
Construction consisting of fans and regenerators.
Generates air flow and provides heat recovery.
TwinFresh Expert cartridge
Construction consisting of fans, a regenerator and air filters.
Generates air flow and provides heat recovery.
Air duct
Plastic air duct.
Air ow separators
Designed for separation of
supply and exhaust air streams.
Outer ventilation hood
Prevents ingress of water and foreign objects into the ventilator.
Each ventilator model has a matching ventilation hood model.
Sound absorbing material
A layer of sound-absorbing material for attenuation of noise generated
during the ventilator operation.
TwinFresh Expert Duo
TwinFresh Expert
VENTILATOR DESIGN
OPERATING LOGIC OF THE AUTOMATIC SHUTTERS
The shutters are closed The shutters are open
The ventilator consists of an indoor unit with a decorative front panel, a cartridge, an air duct with a sound absorbing layer and an outer
ventilation hood.
The cartridge is a basic functioning part of the ventilator.
The cartridge consists of the fan, the regenerator and two filters that ensure rough air filtration 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 air backdraft.
The TwinFresh Expert Duo RW1 units are equipped with a set of air flow separators. The design of the supplied ventilation hood
ensures opposite direction of extract and supply air flows.
The outer ventilation hood is used to prevent direct ingress of water and other objects to the ventilator.
The indoor unit is equipped with automatic shutters.
During the ventilator operation the automatic shutters are opened and let the air flow freely through the ventilator.
The automatic shutters are closed for 2 minutes at the ventilator shut down.
DESIGN AND OPERATING PRINCIPLE

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VENTILATOR OPERATION MODES
TwinFresh Expert RW1 TwinFresh Expert Duo RW1
Ventilation: the ventilator runs either in air extraction or air supply
mode at a set speed.
In this mode some of the ventilators in the network run in air supply
mode and the other ones in air extraction mode, depending on
the direction set using the personal computer (see page 18).
Regeneration: the ventilator runs in two cycles, 70 seconds each,
with heat and humidity regeneration.
Cycle I. Warm stale air is extracted from the room and flows
through the ceramic regenerator, which gradually absorbs heat
and humidity. In 70 seconds, as the ceramic regenerator gets
warmed, the ventilator is switched to air supply mode.
Cycle II. Fresh intake air from outside flows through the ceramic
regenerator, absorbs accumulated moisture and is heated up to
the room temperature. In 70 seconds, as the ceramic regenerator
gets cooled down, the ventilator is switched to air extraction
mode and the cycle is renewed. If two ventilators are installed,
they operate with opposite rotation directions in this mode. While
one ventilator supplies air, the other one extracts it.
Boost mode is activated when the external relay sensor, the
external 0-10 V analogue sensor or the integrated humidity sensor
is triggered.
The ventilator operates at maximum speed without changing the
operation mode.
After all sensors return to normal state or upon elapse of the turn-
off delay timer countdown (from 0 up to 24 hours, factory setting
30 minutes) the ventilation unit reverts to the previous speed.
Supply mode is activated only using the mobile application.
The ventilator operates in the supply mode irrespective of the air
flow direction set via the personal computer (see page 18).
One fan operates in the air extraction mode and the other fan
operates in the air supply mode at set speed. The fans do not
change their rotation direction.
Regeneration - one of the ventilator fans operates in the air
extraction mode and the other one operates in the air supply
mode.
The fans change their rotation direction every 70 seconds.
Boost mode is activated when the external relay sensor, the
external 0-10 V analogue sensor or the integrated humidity sensor
is triggered.
The ventilator operates at maximum speed and follows one of two
functioning algorithms to be set during setup of the ventilation
unit via a PC. For details, refer to page 18.
Humidity control scenario:
• Increase speed and switch to air extraction mode (both fans
operate at air extraction mode)
• Increase speed in current mode.
After all sensors return to normal state or upon elapse of the turn-
off delay timer countdown (from 0 up to 24 hours, factory setting
30 minutes) the ventilation unit reverts to the previous speed.
Supply mode is activated only using the mobile application.
Both fans operate in air supply mode.

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READ THE USER'S MANUAL BEFORE INSTALLING THE UNIT.
DO NOT BLOCK THE AIR DUCT OF THE INSTALLED VENTILATOR WITH DUST
ACCUMULATING MATERIALS, SUCH AS CURTAINS, CLOTH SHUTTERS, ETC.
AS IT PREVENTS AIR CIRCULATION IN THE ROOM.
1. Prepare a round core hole in the outer wall.
The hole size is shown in the figure below.
While preparing core holes it is recommended to make preparations for layout of the power cable and other required cables.
ø 180
ø 7"
min 300
min 12"
min 300
min 12"
min 300
min 12"
A
AA-A
2. Install the air duct in the wall and fix it with mounting foam.
The air duct end must protrude for the distance that enables installation of the outer ventilation hood (see the User’s manual for the
outer ventilation hood).
min 3 mm
min (1/8’’)
A
Fill the gaps between
the wall and the hole
with a mounting foam.
Foam wedge Install the air duct in the wall in such a way so it protrudes from the
wall surface for maximum 3 mm or is flush with the wall.
Install the air duct with the minimum slope 3 mm downwards.
On the outer wall side the air duct end must protrude to a distance
that enables installation of the outer ventilation hood.
Distance A is stated in the installation instruction for the ventilation
hood.
MOUNTING AND SETUP
NO CONDENSING WATER  ELECTRONIC PART IS SUPPLIED ALL THE TIME, INDOOR
AND SHIELDED FROM AIR FLOW.
NO AIR WITH HUMIDITY WILL PASS THROUGH COMPARTMENTS WITH
HAZARDOUS ELECTRICAL COMPONENTS AND CONNECTIONS.

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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 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 wall outside through the specially marked opening on the master plate.
4. Unlatch and detach the front part of the indoor unit from its back part.
The thermal actuator rod
must be in lower position
when installing the front
panel of the
TwinFresh Expert unit.
5. Fix the back part of the indoor 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 as figured below and connect the ventilator to power mains in compliance with the external wiring diagram,
refer to Page 12.
Fix the power cable and the signal cables with cable clamps.
After completion of the electrical connection re-install the transparent cover in site.
Cable clamp

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7. Install the cartridge into the air duct as figured below. The pointer must be directed upwards.
Then fix the wire with the protruding clamp and connect the connector to the circuit board.
Insert the wires under the cable
clamp and connect the
connector to the circuit board.
The mark must
be directed upwards.
8. Install the front part of the indoor unit.
The air shutter actuator rod must be in lower position, as shown in the figure in Section 4 on page 10.
TwinFresh Expert RW1 TwinFresh Expert Duo RW1
9. Insert the sound absorbing layer into the air duct from the
outside.
Roll the layer of the sound absorbing material to match the air
duct diameter. The protecting paper layer must be outside.
Insert the sound absorbing roll into the cartridge against stop.
Make a mark at the end of the air duct, remove the material and
cut the roll as marked.
Insert the ready sound absorbing roll into the air duct.
9. Install the sectional air flow separators from the outside.
Install a required quantity of the air flow separators in the air duct
until it bumps up the cartridge. Mark the last air flow separator to
be flush with the air duct face, remove it from the air duct and cut
the excessive part of the last air flow separator.
Tighter fixation is provided if the air flow separator protrudes to
some distance.
Install the adjusted air flow separators in the air duct.
10. Install the outer ventilation hood. For this, see the user’s manual for the hood.

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The ventilator is rated for connection to single-phase AC 120V 60Hz power mains.
Connect the unit to power mains through the external automatic switch with a magnetic trip integrated into the fixed wiring system.
Use a two-pole circuit breaker with type B protection.
Note that the rated current of the circuit breaker for one ventilator is not more than 1 A, and for a network of ventilators with common
power supply not more than 3 A (no more than 10 ventilators in one network).
Use flexible wires for electrical connection.
The cross section of the conductors must be selected at intervals
from the tables below.
Type of connection Min. cross section
[mm] (AWG)
Max. cross section
[mm] (AWG)
Power cable 0,5 mm (20 AWG) 2,5 mm (14 AWG)
Signal cable
0,25 mm (22 AWG) 1,5 mm (16 AWG)
The cable cross-section is given for reference only.
The actual conductor cross-section selection must be based on
its type, maximum permissible heating, insulation, length and
installation method.
Use copper wires for all the electric connections!
Connect the ventilator to power mains in compliance with the
wiring diagram.
The ventilator design enables connecting any external controls
with normally opened contacts (NO-contacts), such as an external
CO sensor, a humidity sensor, a switch, etc.
When the contacts of the NO contact of the external device are
closed, the unit changes to the maximum speed.
An analogue sensor with output voltage 0-10 V is also compatible
with the unit.
EXTERNAL CONNECTIONS DIAGRAM
L (~)
N (~)
QF*
N
L
N
L
In
Gnd
NO1
NO2
+12V
Power
AC 120V 60Hz
Power to the
next ventilator
Input for 0-10 V
analogue sensor
NO contact
of an external control unit
* The units are not included in the delivery set
VENTILATOR SETUP
ON DIP
1 2 3 4
DIP switch and
USB socket under
the cover
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 off the front panel of the
indoor unit and uplift the rubber plug that covers the
switch.
The USB socket that enables connection of the unit to a
PC is located under the rubber cover.
CONNECTION TO POWER MAINS AND CONTROL
WARNING! SHOULD BE CONNECTED THROUGH SWITCH, BUILT INTO THE FIXED WIRING
ACCORDING LOCAL INSTALLATION RULES
POWER OFF THE POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
THE UNIT MUST BE CONNECTED TO POWER SUPPLY BY A QUALIFIED
ELECTRICIAN.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE
MANUFACTURER’S LABEL.

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POSITIONING OF THE DIP SWITCHES
Ventilator operation mode
2
The main operation mode in which the Wi-Fi parameters (specied in the Vents TwinFresh application on the PC) are
applied.
To activate this mode, set the first and second jumpers to OFF position. Turn the power supply to the unit off and on to apply the
parameters.
12
Demo Slave mode: set the first jumper to ON position and set the second jumper to OFF position. Turn the power supply to the unit
off and on to apply the parameters.
The mode description see on page 25.
12
Demo Master mode: set the first and the second jumper to ON position. Turn the power supply to the unit off and on to apply the
parameters.
The mode description see on page 25.
1
Resetting to factory settings:
2
To reset the factory settings, set the first jumper to OFF position and the second jumper to ON position. Turn the power supply to the
unit off and on to apply the parameters.
After resetting, return the jumpers to the previous position.
1
Resetting timer lter
3
To reset the filter timer, set the third jumper to ON position and then revert it to OFF position.
Service mode
4
Download mode for the basic rmware: set the fourth jumper to OFF position.
Turn the power supply to the unit off and on to apply the parameters.
4
Normal operation of the unit: set the fourth jumper to ON position.
Turn power supply to the unit off and on to apply the parameters.
VENTILATOR CONTROL
The ventilation unit may be operated with the following controls:
- infra-red remote control
- control - located on the side of the indoor unit (see the figure below)
- Vents TwinFresh application from a mobile device (smartphone or tablet)
Turning
the ventilator on/o
Party mode
Activation of Speed III by timer
(4 hours by default).
Night mode
Activation of Speed I by timer
(8 hours by default).
Speed selection
Speed/Standby
The speed setting engages cyclically:
I-II-III-Standby
Remote control
Buttons on the
ventilator casing
Ventilation mode
TwinFresh Expert RW1-50
The ventilator operates in permanent
air supply or air extraction mode at
set speed.
TwinFresh Expert Duo RW1-30
One of the fans of the ventilation unit
operates in air extraction mode and
the other one operates in air supply
mode at set speed. The air flow
direction remains constant.
Regeneration mode
TwinFresh Expert RW1-50
In this mode the unit switches
between supply and extract mode
every 70 seconds with heat recovery.
Heat recovery is performed in this
mode.
TwinFresh Expert Duo RW1-30
In this mode the fan rotation direc-
tion changes to opposite every 70
seconds. Heat recovery is performed
in this mode.

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VENTILATOR CONTROL WITH THE BUTTONS ON THE INDOOR UNIT
The speed selection sequence is follows: I-II-III-Standby
All the units integrated in a single network operate according to the speed settings of the Master unit.
I: permanent indicator glowing indicates operation of the unit at Speed I.
The indicator blinks when the first speed timer is activated.
I and II: permanent glowing of the indicators I and II indicates operation of the unit at Speed II.
I, II and III: permanent glowing of the indicators I, II and III indicates operation of the ventilator at Speed III.
Blinking of the indicators I, II and III indicates activation of the timer for Party mode or the turn-off delay timer triggered by any connected
external sensors or the integrated humidity sensor.
Alternate blinking of the indicators I, II and III indicates that the ventilator runs at the speed set with the mobile application using the slider
selector for manual speed setting.
Regeneration mode.
TwinFresh Expert RW1
The rotation direction of both fans changes to opposite every 70 seconds. Heat recovery is performed in this mode. When several ventilators are
operating on the network, it is necessary to configure a different direction of rotation of the fans using the application on a PC.
TwinFresh Expert Duo RW1
The rotation direction of both fans changes to opposite every 70 seconds. Heat recovery is performed in this mode.
Ventilation mode.
TwinFresh Expert RW1
The ventilator operates in permanent air supply or air extraction mode at set speed.
The ventilation unit operates in the air supply or extraction mode with a set speed. The fan rotation direction depends on PC setting (air
extraction mode by default).
TwinFresh Expert Duo RW1
One fan operates in the air extraction mode and the other fan operates in the air supply mode at set speed. The fans do not change their
rotation direction.
No glowing of the indicators «Regeneration» and «Ventilation» indicates forced operation of the ventilation unit in the air supply mode.
This mode may be activated only via the mobile application.
Filter
Contamination indicator of lters.
90 days (continuous operation) after installation of the cartridge the Filter contamination indicator starts glowing.
In this case, clean or replace the filters (see the «Technical maintenance» section).
Reset the timer after filter replacement:
• ventilators operating in Master mode using a DIP switch, an application on a mobile device or using a PC;
• ventilators operating in Slave mode using a DIP switch or PC.
Alarm
Alarm indicator for emergency shutdown of the unit. Permanent glowing of the Alarm indicator of the Master unit indicates an alarm in the
network of the connected ventilation units. Its blinking indicates shutdown of a specific ventilation unit in the network.
In case of an emergency shutdown of a TwinFresh Expert RW1 unit in the network the defective ventilation unit is marked with the blinking
Alarm indicator. All the connected TwinFresh Expert RW1 ventilation units are also stopped. All the connected TwinFresh Expert Duo RW1
ventilation units continue operating. In case of an emergency shutdown of a TwinFresh Expert Duo RW1 unit in the network the defective
ventilation unit is marked with the blinking Alarm indicator. The defective ventilation unit shuts down and the other connected ventilation
units continue their operation.
Master
Master unit indicator
Permanent glowing of the indicator shows the leading unit in the network (Master unit).
Indicator blinking indicates the driven unit (Slave unit) and no connection to the Master unit.
No glowing of the lamp indicator means that this ventilation unit is a Slave ventilation unit and it is connected to a Master unit.
Synchronous blinking of all the lamp indicators on the casing of the ventilation unit means active setup mode performed by a PC.
In this case the fan shuts down.

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REMOTE CONTROL OF THE VENTILATION UNIT
Turning the ventilator on/off.
The unit may be turned off only if it is enabled by the settings.
Reset of alarm and timer settings.
Ventilator speed selection: Speed III-II-I respectively.
Regeneration mode.
TwinFresh Expert RW1
The rotation direction of both fans changes to opposite every 70 seconds. Heat recovery is performed in this mode.
TwinFresh Expert Duo RW1
The rotation direction of both fans changes to opposite every 70 seconds. Heat recovery is performed in this mode.
Ventilation mode.
TwinFresh Expert RW1
The ventilator operates in permanent air supply or air extraction mode at set speed.
The ventilation unit operates in the supply or extract mode with a set speed. The fan rotation direction depends
on PC setting (extract mode by default).
TwinFresh Expert Duo RW1
One of the fans of the ventilation unit operates in air extraction mode and the other one operates in the supply
mode at set speed. The air flow direction mains constant.
Timer control buttons:
Party mode: the timer activates operation of the unit at Speed III for a set time period, 4 hours by default. The
setting may be edited during setup of the unit or using the mobile application.
Night mode: the timer activates operation of the ventilation unit at Speed I for a set time period, 8 hours by
default. The setting may be edited during setup of the unit or using the mobile application.
The ventilation unit reverts to operation with a previous speed setting upon elapse of the set time period.
Press any speed setting key to deactivate the timer or press the timer control button once again.
VENTILATION UNIT SETUP
Download and install the software to setup the ventilation unit.
The link for downloading is available at: https://ventilation-system.com/download. Select the document type “Software”.
Use the search bar to find the software for the VENTS TwinFresh Expert Wi-Fi devices.
Download the software file.
To control the ventilator, download and install the application on your smartphone or tablet.
Use the QR codes below to get download links:
App Store download link Play Market download link
Your mobile device must have an operating system matching the following parameters:
• • iOS – 7 or later. Compatible with iPhone, iPad, iPod.
• • Android – 4 or later.

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TwinFresh Expert (Duo) RW1
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Connection of the ventilation unit to PC:
• Start the application Vents TwinFresh.exe at your PC.
• Take off the front part of the indoor unit for accessing the DIP switch and USB connector on the control board under the rubber
cover (refer to Ventilation Unit Setup).
• Connect the ventilation unit and PC using a USB to mini USB cable.
• Select the menu language prior to starting operation (3).
• Select a required unit from the dropdown list Select device. Select the unit (1).
• When a new unit is connected to a PC, the program automatically detects the connected ventilation unit and it is displayed in the
dropdown list Select device.
• Select an operation mode for the ventilation unit in the network (2). Available parameters for the Master mode: 4-13. Available
parameters for the Slave mode: 4-5.
1
2
Fan tab
4
7
6
9
10
11
3
5
8
12
13
14
Unit setup:
Prior to starting setup of the unit open the Fan tab.
• Receive current parameters: reading the settings from the connected unit and saving them in the program.
• Restore default parameters: resetting the factory settings in the connected unit.
• Available OFF device (active by default): enabling/disabling of the unit turning off.
• The attempt to turn the unit off will turn it to low speed mode.
• To disable the function, uncheck «Available OFF device».
• Direction (applicable only forTwinFresh Expert RW1-50): setting rotation direction of the fan in Ventilation mode. This parameter
also sets the fan rotation direction in the Regeneration mode.
• Humidity control scenario (for TwinFresh Expert Duo RW1-30): setting reaction of the ventilation unit for activation of a sensor.
• Turn-o delay timer: setting reset time to a previous operation mode for the ventilation unit after activation of any connected
sensors or the built-in humidity sensor.
• Night mode timer: setting reset time to the low speed mode after activation of the night mode, factory setting 8 hours.
• Party mode timer: setting changeover time for high-speed mode after activation of the Party mode, factory setting 4 hours.
• Humidity sensor: activation of the humidity sensor. When the indoor humidity exceeds the set point (12), the unit changes to the
high speed. When the indoor humidity drops down below the set point, the turn-off timers starts countdown and then the unit
changes to the previous speed.
• Relay sensor: activation of the external relay sensor (10). When the no-contact of the external relay sensor is closed, the unit changes
to the maximum speed. When the NO-contact is open, the turn-off delay timer starts countdown and then the unit changes to the
previous speed.
• 0-10 V sensor: activation of the external analogue sensor 0-10 V. When a 0-10 V control signal value exceed the set point (13), the
ventilation unit changes to the high speed. As the control signal value falls down below the set point, the turn-off timer starts its
countdown and upon its elapsing the ventilation unit reverts to operation with the previous speed.
• Apply: press the button (14) to apply the parameters in the selected tab.

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RESET FILTER TIMER
• Start the program Vents TwinFresh.exe at your PC.
• Connect the ventilation unit and PC using a USB to mini USB cable.
• Select a required unit from the dropdown list Select device. Select the unit (1).
• Select the Filter tab.
Press the button Reset lter timer (3) to reset the timer. After replacement of the filters the operating hours are displayed above the
button (2).
3
1
2
EMERGENCY SHUTDOWN OF THE UNIT
Emergency shutdown of the unit appears if the fan shutdown lasts above 5 seconds.
In case of emergency shutdown of any TwinFresh Expert RW1 unit in a chain all the TwinFresh Expert RW1-50 units stop. The
TwinFresh Expert Duo RW1-30 units continue to operate.
In case of emergency shutdown of any TwinFresh Expert Duo RW1-30 unit, all the other units in the chain continue to operate.
The alarm is confirmed by a respective alarm indication for all the ventilation units in the network, see page 16.
To reset the alarm indication troubleshoot the fan shutdown and restart the unit using the button on the indoor unit or the remote
control. If the alarm indication is still active, please refer to the Seller.
Cut off power supply to a defective unit to enable operation of the other units in the network.

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VENTILATION UNIT OPERATION WITH THE MOBILE APPLICATION
To enable operation of the unit with a mobile device, install the Vents TwinFresh application to your mobile device.
After installation of the application turn the unit on and connect your mobile device to a wireless access point.
Start the application for operation of the unit at your mobile device.
Detailed description of the connection to Wi-Fi read at page 23 and 25.
Turn the unit on/off.
Selection of pre-set speed.
Low, medium, high speed respectfully.
Manual speed setup.
To activate the scroll bar, check it.
Ventilation mode.
The ventilator operates in permanent air supply or air extraction mode at
set speed. The fan rotation direction depends on PC setting (air extraction
mode by default).
Regeneration mode.
The rotation direction of both fans changes to opposite every 70 seconds.
Heat recovery is performed in this mode.
Supply mode. The ventilation unit operates exclusively in air supply mode.
Night mode: low speed timer activation, by default for 8 hours. The timer
setting is set during unit setup via a PC or the mobile application.
Party mode: high speed timer activation, by default for 4 hours. The timer
setting is set during unit setup via a PC or the mobile application.
Current type of connection to the ventilator. Home connection or connection via a cloud server through
Internet respectively.
Wi-Fi connection indicator.
Maximum speed activation indicator. It goes on after activation of any sensor. This mode has higher priority as
compared to the Party or Night modes. When this mode is activated, all the other modes are deactivated. Upon
elapse of the turn-off delay timer countdown (from 0 up to 24 hours, factory setting 30 minutes) the ventilation
unit reverts to the previous mode.
Press Power to deactivate this operation mode.
Humidity indicator. It glows if the indoor humidity is above the set point.
Indicator of external relay sensor. It glows if the external relay sensor is activated.
Indicator of external analogue sensor 0-10 V. It glows if a set value of the external sensor is exceeded.
Emergency shutdown indicator. It glows in emergency case.
Indicator button for resetting the filter timer. It glows after 90 days of non-stop operation of the unit.
Pressing the button will reset the filter timer of the Master unit only. All the units are equipped with a non-
volatile filter timer. To reset the filter timer of the Slave units, set the DIP switch 3 to a respective position or use
a downloaded program at your PC.