Vents TwinFresh Expert RW1-50S3-13 V.2 User manual

TwinFresh Expert RW1-50S3-13 V.2
Single-room reversible energy recovery ventilator
USER’S MANUAL

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Safety requirements..................................................................................................................................................................... 2
Purpose................................................................................................................................................................................................ 4
Delivery set........................................................................................................................................................................................ 4
Designation key.............................................................................................................................................................................. 4
Technical data.................................................................................................................................................................................. 5
Design and operating principle ........................................................................................................................................... 6
Mounting and set-up.................................................................................................................................................................. 8
Connection to power mains .................................................................................................................................................. 11
Technical maintenance.............................................................................................................................................................. 19
Storage and transportation regulations.......................................................................................................................... 21
Manufacturer’s warranty........................................................................................................................................................... 22
Certificate of acceptance.......................................................................................................................................................... 23
Seller information.......................................................................................................................................................................... 23
Installation certificate.................................................................................................................................................................. 23
Warranty card................................................................................................................................................................................... 23
This unit is not intended for use by persons (including children) with reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the unit by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the unit.
This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in a safe way and understand
the hazards involved.
Cleaning and user maintenance shall not be made by children without supervision.
Children shall not play with the appliance.
Connection to the mains must be made through a disconnecting device, which is integrated
into the fixed wiring system in accordance with the wiring rules for design of electrical units,
and has a contact separation in all poles that allows for full disconnection under overvoltage
category III conditions.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent, or
similarly qualified persons in order to avoid a safety hazard.
Ensure that the unit is switched off from the supply mains before removing the guard.
Precautions must be taken to avoid the back-flow of gases into the room from the open flue of
gas or other fuel-burning appliances.
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 RW1-50S3-13 V.2 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.
CONTENTS
SAFETY REQUIREMENTS

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The appliance may adversely affect the safe operation of appliances burning gas or other
fuels (including those in other rooms) due to back flow of combustion gases. These gases can
potentially result in carbon monoxide poisoning. After installation of the unit the operation
of flued gas appliances should be tested by a competent person to ensure that back flow of
combustion gases does not occur.
All operations described in this manual must be performed by qualified personnel only, properly
trained and qualified to install, make electrical connections and maintain ventilation units.
Do not attempt to install the product, connect it to the mains, or perform maintenance yourself.
This is unsafe and impossible without special knowledge.
Disconnect the power supply prior to any operations with 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.
Disconnect the unit from the power supply prior to any connection, servicing, maintenance, and
repair operations.
Connection of the unit to power mains is allowed by a qualified electrician with a work permit
for the electric units up to 1000 V after careful reading of the present user’s manual.
Check the unit for any visible damage of the impeller, the casing, and the grille before starting
installation. The casing internals must be free of any foreign objects that can damage the
impeller blades.
While mounting the unit, avoid compression of the casing! Deformation of the casing may result
in motor jam and excessive noise.
Misuse of the unit and any unauthorised modifications are not allowed.
Do not expose the unit to adverse atmospheric agents (rain, sun, etc.).
Transported air must not contain any dust or other solid impurities, sticky substances, or fibrous
materials.
Do not use the unit in a hazardous or explosive environment containing spirits, gasoline,
insecticides, etc.
Do not close or block the intake or extract vents in order to ensure the efficient air flow.
Do not sit on the unit and do not put objects on it.
The information in this user’s manual was 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.
Never touch the unit with wet or damp hands.
Never touch the unit when barefoot.
BEFORE INSTALLING ADDITIONAL EXTERNAL DEVICES, READ THE RELEVANT USER MANUALS.
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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Name Number
Indoor unit of the ventilator 1 pc.
Air duct 1 pc.
Sound-absorbing material 1 pc.
Assembled cartridge 1 pc.
Outer ventilation hood 1 pc.
Remote control 1 pc.
Cardboard template 1 pc.
Fastening set 2 packs
Foam wedges 1 set
User's manual 1 pc.
Mounting hood installation instruction 1 pc.
Packing box 1 pc.
TwinFresh Expert R W 1 -50 S3 L-13 V.2
Unit version
V.2 – Wi-Fi controllable, connection to PC is not required
Ventilation hood model
13 – ventilation hood for a cold climate
Air duct length
_ – 500 mm
L – 700 mm
Cartridge modication
S3 – cartridge for cold climate
Rated air ow [m/h]
Front panel modication
1 – flat front panel
Automation type
W – connection of ventilators via Wi-Fi
Air duct cross section
R – round
Ventilator series
Expert – series of reversible ventilators with unidirectional air flow
PURPOSE
The ventilator is designed to ensure continuous mechanical air exchange in flats, cottages, hotels, cafés and other domestic and public
premises. The ventilator is equipped with a regenerator that enables supply of fresh filtered air heated by means of extract air heat energy
recovery.
The ventilator is designed for installation on external walls.
The ventilator is rated for continuous operation.
DELIVERY SET
DESIGNATION KEY

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The ventilator is rated for indoor application with the ambient temperature ranging from -30 °C up to +40 °C and relative
humidity up to 65 %.
The unit is rated as a class II electric appliance.
Ingress protection rating against access to hazardous parts and water ingress is IP24.
The ventilator design is regularly improved, so some models may slightly differ from those ones described herein.
Technical specifications of the particular model are indicated on the unit casing.
A
Ø 160
(Ø 6 5/16")
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
A: protruding part of the air duct on the outer wall. Depends on the selected
ventilation hood type.
L: cartridge length. Depends on the cartridge modification.
The supplied air duct length and the supplied ventilation hood model depends
on the ventilator model, refer to the Designation Key section, page 4.
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 mounting instruction.
The overall dimensions of the front panel are stated below.
Ventilator model L, mm
TwinFresh Expert RW1-50S3-13 V.2 270
68
235
285
207
85
137
138
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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Front part of the indoor unit with front panel
Fulfils the decorative function. The design enables to shut off the
air duct in case of an extended downtime of the ventilator.
Back part of the indoor unit
The assembly unit includes a circuit board and basic
control units located on the side of the indoor unit.
Cartridge
Construction consisting of fans, filters and a regenerator.
Generates air flow, provides heat recovery.
Air duct
Plastic air duct.
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.
VENTILATOR DESIGN
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 fans, 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 outer ventilation hood is used to prevent direct ingress of water and other objects to the ventilator.
DESIGN AND OPERATING PRINCIPLE
The technical data of the specific model are indicated on the label on the ventilator casing.

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OPERATING LOGIC OF THE AUTOMATIC SHUTTERS FOR TwinFresh Expert
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.
Shutters are closed Shutters are open
VENTILATOR OPERATION MODES
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 position of the DIP switch No. 3 (see page 12).
Boost : the ventilator goes to the maximum speed without changing the operation mode.
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.
Air supply: the ventilator operates in air supply mode irrespective of the position of the DIP switch No. 3 (see page 12).
The ventilators are equipped with an air humidity sensor and terminals for connecting an external 0-10 V analogue sensor and an
external normally open contact (relay sensor). When either of these devices is triggered, the ventilator switches to the maximum
speed (Boost mode).
When the sensors return to their original position, the Boost mode turn-off delay timer starts.
In the relevant sections of the Vents Home mobile application, you can configure the following ventilator operation parameters:
• enable or disable the humidity sensor, 0-10 V analogue sensor, and relay sensor;
• set the threshold for the humidity sensor and 0-10 V analogue sensor;
• set the duration of the Boost mode turn-off delay (30 minutes by default);
• set the duration of the first speed timer (“Night mode”) (8 hours by default);
• set the duration of the third speed timer (“Party mode”) (4 hours by default).
If necessary, in the“Schedule of the Vents Home mobile application” section, you can set different speeds of the ventilator at different
time intervals by day of the week. For the weekly schedule to work correctly, you must set the current date and time correctly in the
“Date and time” section.
When simultaneously activating several operation modes that exclude each other, the ventilator selects the mode according to the
following priority:
1. Night mode timer or Party mode timer.
2. Standby.
3. Boost.
4. Weekly Schedule.
5. Standard operation 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.
A
AA-A
ø 180
min 300
min 300
min 300
2. Insert the air duct in the wall. For ease of installation use the foam wedges included in the delivery set. The air duct end must protrude
for the distance A that enables installation of an outer ventilation hood. Distance A is stated in the installation instruction for the ventilation
hood.
A
min 3 mm
Fill the gaps between the air duct
and the hole with mounting foam.
Polystyrene wedge
Install the air duct with the minimum slope of 3 mm downwards
from the outer wall side.
The air duct can be cut by calculating preliminary the required length
or after fixing the air duct on the wall (in this case, it is necessary to
have access to the outside part of the wall).
MOUNTING AND SETUP

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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 of the ventilator from the wall through the marked opening on the template.
207
Ø 5
Ø 160
87,5 138
103,5
137
85
Ø 23
Hole marking for fan fastening
4 holes
4. Unlatch and detach the front part of the indoor unit from its back part.
ATTENTION!
For the TwinFresh Expert RW1 prior to
mounting the front panel make sure
that the thermal actuator rod is in the
lowest position.
Blinking of the white led indicator
means that the thermal actuator is not
in the low position!
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, see page 11.
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.
Cable clamp

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7. Install the cartridge into the air duct as figured below. Be sure the pointer is directed upwards. Then fix the wire with the retaining clip
and connect the connector to the circuit board.
Lay the cables under the clamp
and connect the socket connector
to the control board.
The pointer must be
directed upwards
8. Install the front part of the indoor unit.
9. Insert the sound-absorbing layer in the air duct. 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.
10. Install the outer ventilation hood. The mounting sequence of the outer ventilation hood is described in the installation instruction
for the ventilation hood.
ON DIP
1 2 3 4
DIP switch and USB
connector under
the cover

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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.
The ventilator is rated for connection to single-phase AC 100-240V 50/60 Hz power mains.
The routing of the power and signalling cables is shown in the “Mounting and set-up” section.
For electric installations use insulated, durable and heat-resistant conductors (cables, wires) with the minimum cross section of
0.5 up to 0.75 mm for a power cable and 0.25 mmfor signal cables. 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 unit to power mains via the terminal block installed in the control board in compliance with the wiring diagram and terminal
designation.
Connect the ventilator to power mains through an automatic circuit breaker with magnetic trip integrated into the home wiring system.
The tripping current of the circuit breaker is selected based on the electrical characteristics shown on the label of the fan casing.
The ventilator design enables connecting any external controls with a normally opened contact (NO contact), such as an external CO
sensor, a humidity sensor, a switch, etc.
When the NO contact of the external device is closed, the unit changes to the maximum speed.
An analogue sensor with output voltage 0-10 V is also compatible with the unit.
The diagrams below show two options for connecting the ventilator to the power supply depending on the location of the terminals on
the board.
Use the one that corresponds to the location of the terminals on your ventilator.
CONNECTION TO POWER MAINS
1a
2a
N
L (~)
N (~)
L
NO1
NO2
QF*
+12V
I1
Gnd
Input for 0-10 V
analogue sensor
NO contact of the
external device
(relay sensor)
Power supply
AC 100-240 V
50/60 Hz
N
L
N
L (~)
N (~)
L
i1
Gnd
NO1
NO2
+12V
QF* 1a
2a
Power supply to
the next ventilator
Input for 0-10 V
analogue sensor
NO contact of the
external device
(relay sensor)
Power supply
AC 100-240 V
50/60 Hz

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PRESETTING OF THE VENTILATOR
Prior to operating the ventilator set it up 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.
ON DIP
1 2 3 4
DIP switch and USB
connector under
the cover
POSITIONING OF THE DIP SWITCHES
Dening the role of the ventilator when operating in a group
1
OFF - master unit (hereinafter referred to as“Master unit”)
1
ON - slave unit (hereinafter referred to as“Slave unit”)
Standby mode setup
2
OFF - the ventilator is switched off in the Standby mode.
2
ON - the ventilator operates at Speed I in the Standby mode.
Adjusting the airow direction of the TwinFresh Expert in Ventilation mode
and when working as part of a group
3
OFF - operation in air extraction mode.
3
ON - operation in air supply mode.
Restore factory default settings
4
OFF – standard operation of the unit.
4
ON - restore factory default settings. For this purpose, move the switch on the operating ventilator to the ON position,
after the sound signal turn the switch to the OFF position.

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Turning ventilator on/off
Speed selection
Speed/Standby
The speed selection sequence
is follows: I-II-III-Standby.
Regeneration mode
The fan rotation direction changes to
opposite each 70 seconds.
Heat recovery is performed in this mode.
Ventilation mode
The ventilator operates in permanent
air supply or air extraction mode at
set speed.
Party mode. Activation of Speed III
by timer (4 hours by default).
Night mode. Activation of Speed I
by timer (8 hours by default).
The figure below shows the control buttons on the indoor unit and the remote control with a brief description of their function.

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VENTILATOR CONTROL WITH THE BUTTONS ON THE INDOOR UNIT
The table below shows the buttons and indicators on the indoor unit of the ventilator with a detailed description of their purpose and
functionality.
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. Indicator blinking indicates activation
of the Night mode timer.
Iand II: permanent glowing of the indicators I and II indicates running of the ventilator at the medium speed.
I, II and III: permanent glowing of the indicators I, II and III indicates running of the ventilator at the high speed.
Synchronous blinking of the indicators I, II and III indicates activation of the timer in Party mode or the turn-off
delay timer in the Boost mode in case of actuation of the 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 or that the Weekly Schedule mode is activated.
Regeneration mode
The rotation direction of both fans changes to opposite every 70 seconds. Heat recovery is performed in this
mode. To enable reverse phase operation of the ventilators, change the position of DIP switch No. 3.
Ventilation mode
The ventilator operates in the supply or extraction mode at a set speed. The fan rotation direction depends on
the position of the DIP switch 3.
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
90 days after installation of the cartridge the filter replacement indicator starts glowing. In this case, clean or
replace the filters (see section Technical maintenance).
After replacement of the filters reset the timer using the mobile application or by pressing and holding the
button on the Master ventilator indoor unit for 5 seconds until a signal sounds.
Alarm
Alarm indicator.
In case of failure, the Alarm indicator on the indoor unit glows or blinks.
Reasons of Alarm blinking:
Battery charge is below the low level.
No connection between the Master unit and the router.
Alarm shutdown of the ventilator.
If several interconnected ventilators are running in the group, in case of alarm shutdown of the TwinFresh Expert
ventilator, all of the ventilators of this group also stop. The alarm indicator blinks on the defective ventilator and
glows on the other connected ventilators.
In case of communication loss of the Master unit with the router for longer than 20 seconds, the Master unit switches
to Standby mode (Alarm indicator blinking) and the Slave units will signal that there is no communication with
the Master unit (see the description of the Master indicator).
After resuming communication, the Slave units are automatically synchronised with the Master unit.
Master
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 ventilator indicates that the Setup mode is enabled.

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REMOTE CONTROL OF THE VENTILATOR
The table below shows the buttons on the remote control with a detailed description of their purpose and functionality.
ON/Standby. The Standby mode depends on the position of the DIP switch #2 (see“DIP switch position”section).
The same button is used to reset alarms (Alarm) and turn off the timers.
Ventilator speed selection: Speed III-II-I respectively.
Regeneration mode
The rotation direction of both fans changes to opposite every 70 seconds. Heat recovery is performed in this
mode. The fan rotation direction depends on the position of the DIP switch 3.
Ventilation mode
The ventilator operates in the supply or extraction mode at a set speed. The fan rotation direction depends on
the position of the DIP switch 3.
Timer control buttons:
Party mode: the timer activates operation of the ventilation unit at Speed III for a set time period, 4 hours by
default. The timer setting may be changed during setup of the unit on mobile device.
Night mode: the timer activates operation of the ventilation unit at Speed I for a set time period, 8 hours by
default.
The timer setting may be changed during setup of the unit on mobile device.
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.
REMOTE CONTROL OF THE VENTILATOR WITH A VENTS HOME APP
Download the Vents Home application and install it on the mobile device.
Vents Home – App Store Vents Home – Play Market
The ventilator works as a Wi-Fi access point named FAN by default: + 16 ID Number characters) stated on the ventilator casing under the
front panel.
Wi-Fi access point password: 11111111.
To connect, follow the instructions in the mobile app. In the app, you can configure the ventilator to connect via your home Wi-Fi network
and via a cloud server.
CONTROLLING THE VENTILATOR USING THE SMART HOME SYSTEM
The ventilators must be connected to the Smart home system in compliance with user’s manual for this application.

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WIRELESS CONNECTION OF SEVERAL VENTILATION UNITS
The ventilators can be combined into a group in which one ventilator acts as a Master device and the others are connected to it as Slaves.
If the ventilator is a Master unit, Slave units and mobile devices connect to it via Wi-Fi. The Master unit is operated by means of a mobile
device, the remote control or the touch buttons on the unit casing. The control signal is automatically transmitted to all the Slave units in
the network. In this mode the unit responds to a signal from sensors (humidity sensor, external digital sensor, external analogue sensor
0-10 V) and changes its operation mode respectively.
If the ventilator is a Slave unit, it only receives control signals from the Master ventilator. Any other signals from other controls are ignored.
In this mode the TwinFresh Expert ventilators also ignore the sensor signals. In case of communication loss with the Master unit above 20
seconds, the unit switches to Standby mode.
Sensor operation
TwinFresh Expert ventilators only respond to sensor signals when they are in the master role.
If any of the sensors in the TwinFresh Expert are triggered, all TwinFresh Expert ventilators in the group will go to maximum speed.

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VENTILATOR WIRELESS CONNECTION DIAGRAMS
Wiring diagram 1
Connection of up to 8 Slave units or mobile
devices to the Master unit with its own wireless
access point.
If eight Slave ventilators are connected to a Master
ventilator with a Wi-Fi access point
you cannot connect a mobile device!
Master
with a Wi-Fi access point
Slave No. 1 Slave No. 2 Slave No. N
Mobile device
Wiring diagram 2
The Master units, the Slave units and the mobile
devices are connected to a wireless access point
of the Wi-Fi router. In this case, the Master unit
can operate with the number (N) of Slave units,
limited by the technical characteristics of the
router.
Master Slave No. 1 Slave No. N
Mobile device Mobile device
Router
with its wireless access point
If the Wi-Fi router capacity is not enough to
connect a required number of the units, you may
use an extra wireless access point to connect the
other the unit. Several Master units can optionally
be connected to the network for arranging a
zone control.
Master Slave No. 1 Slave No. N
Mobile device Mobile device
Router
with its wireless access point
Slave No. N+1 Slave No. N+N
Mobile device Mobile device
Extra wireless access point

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SPECIAL SETUP MODE
In the event of losing the Wi-Fi password or the master ventilator password or in other cases, use the special Setup mode to restore access
to the ventilator functions.
To enter the special Setup mode, press and hold the Ventilation button on the ventilator casing for 5 seconds until the beep and
blinking of all the LED lights.
The ventilator will continue in this mode for 3 minutes and then automatically revert to the previous settings.
To exit the Setup mode immediately, press and hold the Ventilation button on the ventilator casing once again for 5 seconds until
the beep and shutdown of all the LED lights.
In this mode the following settings are available for the Master unit:
• Wi-Fi network name: Setup mode.
• Wi-Fi password: 11111111.
• The unit password is ignored.
REPLACEMENT OF THE BATTERY
When the battery is low, the Alarm indicator on the unit casing will blink. The mobile app will also display the warning and show the
following message on pressing the indicator icon. Low battery power may cause disruptions in the weekly schedule operation. Power off
the unit before replacing the battery. After replacing the battery reset the time and date.
The battery is located on the control board. To replace the battery, power off the ventilator, remove the front panel and the cover
protecting the control circuit board. Remove the battery and install the new one.
The battery type is : CR1220.
WHEN SETTING UP THE CONNECTION OF THE DEVICES, IT IS NECESSARY THAT
ALL SLAVE VENTILATORS ARE WITHIN THE WIFI COVERAGE AREA OF THE MASTER
VENTILATOR.
AFTER CHANGING THE WIFI PARAMETERS OF THE MASTER VENTILATOR, RECONNECT
THE VENTILATORS
CONNECTING MASTER AND SLAVE VENTILATORS
To create a group of ventilators that are linked together as a Master and Slave, follow these steps:
• Set the DIP switches on each ventilator to the position that corresponds to its role in the group (see “DIP switch position”).
• Then configure the Wi-Fi settings of the Master ventilator by following the instructions in the Vents Home mobile app.
• Set the Master ventilator to the special mode as described above, and all LEDs on the ventilator casing will start flashing. Repeat the
steps with all the Slave units and wait for the beep when all the LED lights stop blinking on each Slave unit. Set the Master unit to the
normal operation mode. Press and hold the Ventilation button.
Note: if the home router works in conjunction with several Wi-Fi access points requiring connection of ventilators to different access
points:
• Connect the Master unit to the first Wi-Fi access point.
• Complete the connection with the first group of Slave units.
• Connect the Master unit to the second Wi-Fi access point.
• Complete the connection with the second group of Slave units.

19
www.ventilation-system.com
Maintenance of the ventilator means regular cleaning of the ventilator surfaces of dust and cleaning and replacement of the filters. To
enable access to the main units, follow the procedure described below. The ventilator must be previously turned off using the remote
control or the buttons on the indoor unit. Then turn off power supply completely.
1. Press the latches on the side of the indoor control unit to take off the front part.
Please make sure the thermal actuator rod is in lower position during re-installation of the front panel. If the thermal actuator
rod is up, please wait for about 2 minutes until it goes down.
Warning!
Prior to mounting the front panel
make sure that the thermal rod is in
the low position and the indicator of
the circuit board doesn't blink.
2. Disconnect the connector from the circuit board. Do not remove the connector by pulling the wires. Use a flat screwdriver to uplift it,
if required.
Disconnect the socket
connector from the control
board
DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE ANY MAINTENANCE
OPERATIONS!
MAKE SURE THE UNIT IS DISCONNECTED FROM POWER MAINS BEFORE REMOVING THE
PROTECTION
TECHNICAL MAINTENANCE

20
TwinFresh Expert RW1-50S3-13 V.2
www.ventilation-system.com
3. Pull the cord to remove the cartridge from the air duct.
Clean the filters as they get clogged, but not less than once in three months.
• Upon elapse of the set time period (factory setting 90 days) the filter replacement indicator (Filter) starts glowing. The filter timer is
reset using the program on the mobile device.
• Wash the filters and let those dry out completely. Install the dry filters in their place and assemble the unit in the reverse order.
• Vacuum cleaning is allowed.
• The filter rated service life is 3 years.
Some dust may accumulate on the heat exchanger block even in case
of regular maintenance of the filters.
• Clean the regenerator regularly to ensure its high heat recovery
efficiency.
• Vacuum clean the regenerator not less than once a year.
4. Replacement of the remote control battery (if necessary).
In case of a long operation of the remote control the battery must be
replaced.
No response of the unit for pressing the remote control buttons
indicates the need to replace the battery.
The battery type is 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