VENTS TwinFresh Style Wi-Fi User Manual

Safety Requirements

All requirements in this manual, along with applicable local and national construction, electrical, and technical norms and standards, must be observed during installation and operation. Always disconnect the unit from the power supply before performing any connection, servicing, maintenance, or repair operations. Installation should only be performed by qualified electricians with a work permit for electrical units up to 1000 V. Read this manual carefully before commencing work.

Before installation, inspect the unit for any visible damage to the impeller, casing, or grille. Ensure the casing internals are free of foreign objects that could damage the impeller blades. Avoid compressing the casing during mounting, as deformation can lead to motor jam and excessive noise. Misuse and unauthorized modifications are prohibited. Do not expose the unit to adverse atmospheric agents (rain, sun, etc.). Transported air must be free of dust, solid impurities, sticky substances, or fibrous materials. Do not use the unit in hazardous or explosive environments containing spirits, gasoline, or insecticides.

Do not obstruct the intake or extract vents to ensure efficient airflow. Do not sit on the unit or place objects on it. The company reserves the right to modify technical characteristics, design, or configuration without prior notice. Never touch the unit with wet or damp hands or when barefoot. This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless supervised by a responsible person. Children should be supervised to ensure they do not play with the appliance.

Connection to the mains must be made through a disconnecting device integrated into the fixed wiring system, compliant with wiring rules and providing full disconnection under overvoltage category III conditions. If the supply cord is damaged, it must be replaced by the manufacturer, their service agent, or similarly qualified persons to avoid hazards. Ensure the unit is switched off from the supply mains before removing the guard. Take precautions to prevent back-flow of gases from fuel-burning appliances into the room.

?️ The product must be disposed of separately at the end of its service life. Do not dispose of the unit as unsorted domestic waste.

Purpose

The ventilator is designed for continuous mechanical air exchange in flats, cottages, hotels, cafés, and other domestic and public premises. It features a regenerator for supplying fresh, filtered air heated by recovered heat from extract air. The unit is designed for installation on external walls and is rated for continuous operation.

Delivery Set

Designation Key

The designation key explains the model naming convention, for example, TwinFresh Style Wi-Fi Frost L07 14 M:

• Air damper opening/closing method: 'automatic/manual' or 'M - manual only'.
• Ventilation hood type: Indicated by specific codes.
• Air duct length: e.g., L03 (300 mm), L035 (350 mm), L07 (700 mm), or 500 mm.
• Modification: 'modification for temperate climate' or 'Frost - modification for cold climate'.
• Ventilator series: TwinFresh Style Wi-Fi ventilators have a 160 mm duct diameter and 50 m³/h airflow. TwinFresh Style Wi-Fi mini ventilators have a 100 mm duct diameter and 30 m³/h airflow.

Technical Data

Operating Room Temperature: +1 °C to +40 °C with relative humidity up to 65% (no condensation).

Transported Air Temperature Range:

• TwinFresh Style Wi-Fi mini / mini M: -15 °C to +40 °C
• TwinFresh Style Wi-Fi / Wi-Fi M: -15 °C to +40 °C
• TwinFresh Style Wi-Fi Frost / Frost M: -30 °C to +40 °C

If operating conditions exceed these limits, turn off the ventilator and provide fresh air via open windows. The unit is rated as Class II electric appliance with an ingress protection rating of IP2X.

Overall Dimensions of the Indoor Unit:

The indoor unit dimensions are provided in millimeters. For TwinFresh Style Wi-Fi models, the duct diameter is Ø 160 mm. For TwinFresh Style Wi-Fi mini models, the duct diameter is Ø 103 mm. The diagrams show the unit's width (152 mm), height (144 mm), depth (71 mm for front part, 248 mm total), and mounting hole positions.

Wi-Fi Technical Data:

Design and Operating Principle

The ventilator comprises an indoor unit with a decorative front panel, a fan unit, a regenerator unit within the air duct, and an outer ventilation hood. For the TwinFresh Style Wi-Fi mini models, the fan and regenerator units are integrated into a single cartridge. Two filters within the airflow path provide rough air filtration and prevent dust ingress into the regenerator and fan.

The TwinFresh Style Wi-Fi Frost models include an EH-13 external ventilation hood with electric heating for colder climates. A receiver window for the IR remote control and a light sensor are located on the lower right corner of the front panel, controlling the brightness of the control panel LEDs.

Ventilator Design Components:

• Outer ventilation hood: Prevents water and foreign objects from entering the ventilator.
• Cartridge: Contains the fan and regenerator for airflow and heat recovery (mini models).
• Regenerator unit: Provides heat recovery.
• Ventilation unit: Generates airflow.
• Air duct: Made of plastic.
• Sound-absorbing material: Reduces operational noise.
• Back part of the indoor unit: Houses the circuit board and control units; allows shutting off the air duct during extended downtime.
• Front part of the indoor unit: Decorative face panel.
• Infrared remote control and light sensor receiver.

Air Damper Operating Principle

The indoor unit features a swivel damper. The OPEN position is indicated by the vertical handle, and the CLOSED position by the horizontal handle. TwinFresh Style Wi-Fi models have an automatic air damper that opens at the start of operation and closes automatically after shutdown. This process can take up to five minutes. If power is lost during operation, the damper can be manually closed after five minutes to prevent drafts. For TwinFresh Style Wi-Fi M models, the damper is manually adjusted using the handle regardless of the operating mode. Note: Damper operation does not turn the ventilator on or off.

Ventilator Operation Modes

• Ventilation: Operates in air supply or extraction mode at a set speed. In a network, units can alternate between supply and extraction based on DIP switch settings.
• Boost: Operates at maximum speed without changing the mode.
• Regeneration: Cycles between 70 seconds of stale air extraction (heating the ceramic regenerator) and 70 seconds of fresh air supply (heated by the regenerator). If two units are installed, they operate in opposite directions.
• Air Supply: Operates exclusively in supply mode, irrespective of DIP switch settings.

Mounting and Set-up

Important: Read the user manual before installation. Do not block the air duct with dust-accumulating materials, as this impedes airflow.

The layout of internal elements depends on wall thickness. The ability to mount the unit is determined by internal element length and required protrusion.

Layout of Ventilator Units Inside the Wall:

Diagrams illustrate the placement of the indoor unit, sound-absorbing material, regenerator, and fan unit within walls of varying thicknesses. Specific dimensions for air duct length and wall thickness are provided for TwinFresh Style Wi-Fi and TwinFresh Style Wi-Fi mini models. For thinner walls, the fine filter holder and sound-absorbing material can be omitted, though this may reduce recovery efficiency and increase noise.

Installation Dimensions Table:

Installation Steps:

1. Prepare the wall hole: Create a round core hole in the outer wall. The hole diameter depends on the ventilator model. Ensure minimum clearance (e.g., 300 mm) from surrounding objects.
2. Insert the air duct: Use mounting wedges. The air duct end must protrude by distance 'A' for outer hood installation. Install the air duct with a minimum 3 mm downward slope from the outer wall side. Gaps between the wall and hole can be filled with mounting foam.
3. Install the outer ventilation hood: Follow the specific installation instructions for the hood.
4. Mount the master plate: Attach the cardboard master plate to the indoor wall using mounting tape, aligning it with the air duct. Mark fastening holes, drill them, and route the power cable through the marked opening.
5. Separate the front panel: Unhook the latches to detach the front panel from the back part.
6. Access terminals: Remove the left cover by undoing retaining screws to access terminals. Route power wires through cable glands.
7. Fix the back part: Secure the back part of the indoor unit to the wall using supplied screws.
8. Connect power: Route the power cable and connect it to the power mains via the terminal blocks (XP1, XP2, XP3 on Circuit board A3 and A1) according to the external wiring diagram. Secure the power cable with a clamp.
9. Reinstall cover: After electrical connection, reinstall the left cover.
10. Install cartridge/regenerator and fan: Insert these units into the air duct and connect the board connector. Insert the sound-absorbing material into the air duct, rolling it to match the diameter. Cut to length as marked.
11. Install the front panel: Attach the front panel to the unit.

Connection to Power Mains

⚠️WARNING: Power off the supply before any operations. Connection must be made by a qualified electrician. Rated electrical parameters are on the manufacturer's label.

The ventilator connects to single-phase AC 100-240 V 50/60 Hz power mains. Use insulated, flexible conductors (0.5-0.75 mm² for power, 0.25 mm² for sensor cables). Copper wires are required for all connections.

Connect via the terminal block on the power board (A3) per the wiring diagram. Use an external circuit breaker with a magnetic trip integrated into the fixed wiring system. The tripping current should be selected based on the fan casing label.

The unit supports external controls with a normally opened contact (e.g., CO2 sensor, humidity sensor, switch) which activate maximum speed when closed. An analogue sensor (0-10 V) is also compatible.

External Connections Diagram:

The diagram shows connections to Circuit board A3 (XP1, XP2, XP3 terminals L, N, H1, H2, IN1, IN2) and Circuit board A1 (XP1 terminals 12V, In, Gnd). It indicates power input (100-240V), connection to the next ventilator, terminals for a heated outer hood, and connections for external relay sensors (NO contact) and analogue sensors (0-10V). An electrical hazard symbol (⚡) is displayed.

Setting the Ventilator Operation Mode Using DIP Switches

DIP switches are located on the controller circuit board, accessible after removing the front panel and lifting the rubber plug.

• Switch 1 (Role): ON = Slave unit, OFF = Master unit.
• Switch 2 (Standby Mode): Min = Speed I in Standby, OFF = Unit off in Standby.
• Switch 3 (Fan Rotation Direction): ON = Supply air (Ventilation mode), starts supply (Regeneration mode). OFF = Extract air (Ventilation mode), starts extract (Regeneration mode).
• Switch 4 (Factory Defaults): ON = Restore factory settings (move to ON, then back to OFF after sound signal). OFF = Standard operation.

For optimal network ventilation, use an even number of ventilators, with half supplying air and half extracting.

Ventilator Control

Operation is possible via:

• Infra-red remote control.
• Control buttons on the indoor unit.
• Vents TwinFresh V.2 mobile application.

Control Buttons and Indicators:

Indoor Unit/Remote Control Buttons:

• On/Standby: Controls standby mode (based on DIP switch 2). Also used to reset alarms and turn off timers.
• Speed Selection: Cycles through Speed III, II, I.
• Manual Speed Setup: Activates a scroll bar for speed adjustment.
• Ventilation Mode: Operates at set speed (supply/extract depends on DIP switch 3).
• Regeneration Mode: Alternates fan direction every 70 seconds for heat recovery (direction depends on DIP switch 3).
• Air Supply Mode: Operates exclusively in supply mode.
• Party Mode: Activates Speed III via timer (4 hours default).
• Night Mode: Activates Speed I via timer (8 hours default).

Indoor Unit Indicators:

• Filter: Glows when filter replacement/cleaning is due (resettable via app or button).
• Alarm: Glows or blinks for failures (e.g., low battery, no router connection, shutdown). In a network, alarms can affect other units.
• Master: Permanent glow indicates the leading unit. Blinking indicates a driven (Slave) unit with no Master connection. No glow means it's a Slave unit connected to a Master. Synchronous blinking of all indicators signifies Setup mode.

Speed indicators (I, II, III) show the current operating speed. Blinking can indicate timer activation or Boost mode.

Mobile Application Operation

Install the Vents TwinFresh V.2 app on a compatible iOS (8+) or Android (4+) device.

Connecting to the Ventilator:

The ventilator acts as a Wi-Fi access point (FAN: + ID number). Connect your mobile device to this point using the default password '11111111'. Alternatively, connect via your home router.

App Connection Steps:

1. Open the app menu.
2. Select 'Connection' -> 'At home'.
3. Choose 'Default connection' for direct connection or search for network settings if using a router.
4. Find and highlight the connection ID.
5. Edit details, rename if needed, and enter the ventilator password (default '1111').
6. Confirm details.
7. Go to the app menu and select 'CONTROL'.

Mobile Application Control Buttons:

• On/Standby: Controls unit power state.
• Speed Selection: Choose from Speed I, II, III.
• Manual Speed Setup: Adjust speed via a slider.
• Ventilation Mode: Set supply or extraction.
• Regeneration Mode: Activates heat recovery cycles.
• Air Supply Mode: Forces air supply.
• Night Mode: Timer for Speed I operation.
• Weekly Schedule: Set timed operations for the week.
• Party Mode: Timer for Speed III operation.

Mobile Application Indicators:

• Connection Type: Shows home or cloud server connection.
• Speed Indicators: Show current speed or timer activation.
• Humidity Indicator: Glows if indoor humidity exceeds the set point.
• External Sensor Indicators: Show activation of relay or analogue sensors.
• Alarm Indicator: Red for emergency shutdown, orange for low battery.
• Filter Replacement Indicator: Signals need for filter cleaning/replacement.

Mobile Application Settings

Ventilator Password Change:

Navigate to Menu -> Connection -> Home, select connection, press Settings, enter and confirm new password, then press 'Change Password'.

Air Flow Setting:

Set fan speed percentages for each speed mode via Menu -> Settings -> Air Flow. This is done on the Master unit only. Slave units will follow the Master's settings.

Timer Setup:

Configure Night mode, Party mode, and Boost delay timers in Menu -> Settings -> Timers.

Sensor Setup:

Configure Humidity, 0-10V, and Relay sensors in Menu -> Settings -> Sensors. These can trigger speed changes or Boost mode.

Date and Time Setup:

Set the current time and date in Menu -> Settings -> Date and time.

Weekly Schedule Setup:

Set up to 4 time intervals per day for different speeds or Standby mode in Menu -> Settings -> Schedule. Use 'Receive' to get current settings and 'Apply' to save changes.

Filter Timer Setting and Reset

Set filter maintenance periodicity (70-365 days, default 90) in Menu -> Settings -> Filter. Reset the filter timer via the app or the indoor unit button after cleaning/replacing filters. The filter rated service life is 3 years.

Restore Factory Default Settings

Restore settings via Menu -> Settings -> Factory settings. Warning: This may disconnect Wi-Fi.

Wireless Connection of Several Ventilation Units

Units operate in two modes: Master: The leading unit, connected to Slave units and mobile devices via Wi-Fi. Responds to sensors. Slave: Driven unit, responds only to the Master. Ignores other signals. Switches to Standby if Master communication is lost for over 20 seconds.

In Master mode, ventilators respond to sensor feedback and all connected units go to maximum speed when any sensor is activated.

Wi-Fi Parameter Setup

Wi-Fi parameters are set on Master units via the app (Menu -> Connection -> WI-FI setup).

• Operation Modes:
• Access Point: Connects without a home router. Security levels: Open, WPA PSK, WPA2 PSK, WPA/WPA2 PSK (recommended).
• Client: Connects to a home router network. Requires router name, password, and IP address type (DHCP recommended, Static for expert users).

Ventilator Wireless Connection Diagrams

Wiring Diagram 1: Connects up to 8 Slave units or mobile devices to a Master unit with its own wireless access point.

Wiring Diagram 2: Connects Master units, Slave units, and mobile devices to a Wi-Fi router's wireless access point. The number of Slaves is limited by the router's capacity. Additional access points can be used for larger networks, and multiple Master units can be connected for zone control.

Connecting Master and Slave Ventilators

⚠️ Ensure Slave ventilators are within Wi-Fi coverage of the Master.

Set DIP switches to Master/Slave positions. Configure Wi-Fi parameters for the Master unit. After changing Master Wi-Fi parameters, repeat connection steps.

Configuration Steps: Press and hold the 'Ventilation' button on the Master unit until beep and LEDs blink. Repeat for Slave units. Set Master to standard operation mode and press 'Ventilation' button until LEDs stop blinking.

Note for Multiple Access Points: Connect Master to the first AP, then group of Slaves. Connect Master to the second AP, then the next group of Slaves.

Special Ventilator Setting Mode:

To restore access if Wi-Fi or Master password is lost, press and hold the 'Ventilation' button for 5 seconds until beep and LEDs blink. The mode lasts 3 minutes. To exit immediately, press and hold the 'Ventilation' button again until LEDs turn off.

Available settings in this mode: Wi-Fi network name (Setup mode), Wi-Fi password (11111111). Unit password is ignored.

Battery Replacement

The Alarm indicator (?) blinks when the battery is low. The mobile app also warns. Low battery may disrupt weekly schedule operation. Power off the unit before replacement. The battery (CR1220) is on the A1 control board. Replace it after powering off, removing the front panel and circuit board cover.

Cloud Server Connection

Control single or multiple ventilators remotely via the mobile app and a cloud server. This function is disabled by default. Enable it via Menu -> Connection -> At home -> Control via cloud server.

Note: Loss of Internet connection may cause temporary communication loss.

To manage the Master ventilator, create an account via Menu -> Connection -> Through cloud server. Enter login, password, and email. Add the Master ventilator using its ID and default password (1111). Log in using your account credentials.

Technical Maintenance

⚠️DISCONNECT FROM POWER SUPPLY BEFORE ANY MAINTENANCE.

Regular maintenance includes cleaning surfaces and replacing filters. Turn off the unit via remote or buttons, then disconnect power completely.

1. Remove the front part of the indoor unit (as per Mounting and Set-up step 5). Move the air damper to horizontal using the handle.
2. Disconnect the circuit board connector carefully using a flat screwdriver; do not pull wires.
3. Remove sound-insulation material from the duct, then remove the cartridge or fan unit and regenerator.
4. Clean filters: When the filter indicator glows, clean or replace filters. The period can be set from 70 to 365 days. Reset the filter timer. Wash filters, dry them completely, and reassemble. Vacuum cleaning is permitted. Filter service life is 3 years.
5. Regenerator cleaning: Clean the regenerator regularly for efficiency. Vacuum clean it at least once a year.
6. Remote Control Battery Replacement: If the remote is unresponsive, replace the CR2025 battery. Remove the battery holder, replace the battery, and reinsert the holder.

Possible Reasons and Troubleshooting

Storage and Transportation Regulations

Store the unit in its original packaging in a dry, ventilated premise at +5 °C to +40 °C and up to 70% relative humidity. Avoid aggressive vapors and chemical mixtures. Use suitable machinery for handling. Protect against precipitation and mechanical damage. Transport only in the working position. Avoid sharp blows or rough handling. Before initial power-up after low-temperature transport, allow the unit to warm up for at least 3-4 hours.

Manufacturer's Warranty

The product complies with EU low voltage and electromagnetic compatibility directives. The manufacturer warrants normal operation for 24 months from the retail sale date, provided transportation, storage, installation, and operation regulations are observed. Warranty repair covers elimination of faults due to the manufacturer. Warranty does not cover routine maintenance, installation/dismantling, or setup. To claim warranty, provide the unit, user manual with purchase date stamp, and payment paperwork. Contact the Seller for service.

The warranty does not apply in cases of user failure to submit required documents, mismatch of model/brand, failure to ensure timely maintenance, external damage caused by the user, unauthorized redesigns, use of unapproved parts, misuse, violation of installation/control regulations, incorrect voltage connection, voltage surges, unauthorized repairs, expiration of warranty, violation of transportation/storage regulations, third-party actions, force majeure events, missing seals, or missing purchase documentation.

⚠️ Following these regulations ensures long and trouble-free operation.

Warranty claims are subject to review upon presentation of the unit, payment document, and user manual with purchase date stamp.

Certificates and Information

Certificate of Acceptance: Details Unit Type, Model, Serial Number, Manufacture Date, and Quality Inspector's Stamp.

Seller Information: Includes Seller, Address, Phone Number, E-mail, and Purchase Date. Customer's Signature acknowledges acceptance of delivery and warranty terms.

Installation Certificate: Confirms the unit was installed according to the user manual and applicable codes. Includes Company name, Address, Phone Number, Technician's Full Name, Installation Date, and Signature.

Warranty Card: Records Unit Type, Model, Serial Number, Manufacture Date, Purchase Date, Warranty Period, and Seller.

Contact Information

AIRTECHNIC
www.airtechnic.gr
Air-Conditioning & Ventilation Components & Systems
Μιχαήλ Καραολή 19, Νέα Χαλκηδόνα, 14343 Αθήνα
Τηλ: 211–70.55.500
Fax: 210-22.23.283
sales@airtechnic.gr