Awenta PRO ZEPHYR 405 Specification sheet

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AWENTA Spółka Jawna, Warszawska 99, 05-300 Stojadła
AWP.VZH.01A.2023_EN
Operation and Installation Manual
Air handling unit with heat recovery
ZEPHYR 405 / 605
Air handling unit equipped with Aero 4A ver.2 ventilation controller with NANO COLOR 10 control panel

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TABLE OF CONTENTS
1. OPERATOR’S MANUAL
1.1. IMPORTANT INFORMATION/SAFETY INSTRUCTIONS................................................................................................... 4
1.2. INTENDED USE ............................................................................................................................................................. 5
1.3. TRANSPORT AND STORAGE ......................................................................................................................................... 5
1.4. SAFETY MEASURES REGARDING OPERATING OF THE UNIT ......................................................................................... 5
1.5. TECHNICAL SPECIFICATION .......................................................................................................................................... 6
1.6. TECHNICAL DRAWING ................................................................................................................................................. 7
1.7. BASIC COMPONENTS OF THE UNIT/LAYOUT OF CONNECTIONS.................................................................................. 8
1.8. OPERATION PRINCIPLE................................................................................................................................................. 9
1.9. ITEMS OF EQUIPMENT................................................................................................................................................. 9
1.10. INSTALLING AND PREPARING THE UNIT FOR OPERATION ......................................................................................... 9
1.11. MAINTENANCE......................................................................................................................................................... 11
1.12. PRE-HEATER ............................................................................................................................................................. 11
1.13. WASTE MANAGEMENT NOTICE ............................................................................................................................... 12
2. NANO COLOR CONTROL PANEL
2.1. OPERATION PRINCIPLE............................................................................................................................................... 13
2.2. INSTALLATION ............................................................................................................................................................ 13
2.3. DESCRIPTION OF THE MAIN SCREEN ......................................................................................................................... 14
2.4. OPERATION MODE..................................................................................................................................................... 16
2.5. SETTINGS.................................................................................................................................................................... 18
2.6. TEMPERATURE SETTINGS........................................................................................................................................... 19
2.7. THERMOSTAT INFO .................................................................................................................................................... 19
2.8. VENTILATION INFORMATION SCREEN........................................................................................................................ 19
2.9. FIREPLACE OPERATION MODE ................................................................................................................................... 20
2.10. CHANGING THE SYSTEM OPERATION MODE ........................................................................................................... 20
2.11. SENSORS .................................................................................................................................................................. 22
2.12. VEX4 MODULE ......................................................................................................................................................... 24
2.13. SMART MODE .......................................................................................................................................................... 24
2.14. FOULED FILTER INDICATION..................................................................................................................................... 25
2.15. MAIN MENU............................................................................................................................................................. 25
2.16. SCHEDULE SETTINGS................................................................................................................................................ 26
2.17. SERVICE MENU......................................................................................................................................................... 26
2.17.1. IN-OUT .................................................................................................................................................................. 28
2.17.2. DISTRIBUTOR ........................................................................................................................................................ 28
2.17.3. NANO .................................................................................................................................................................... 28
2.17.4. VENTILATION......................................................................................................................................................... 30
2.17.5. SENSORS ............................................................................................................................................................... 32
3. NANO WIRELESS NETWORK ..................................................................................................................................33
4. VLAN INEXT INTERNET MODULE ...........................................................................................................................33
5. WIRING DIAGRAMS
5.1. ELECTRICAL DIAGRAM OF THE AERO 4 CONTROLLER – version for operation scheme 1. Standard.......................... 34
5.2. CONNECTING THE NANO COLOR CONTROL PANEL ................................................................................................... 35
5.3. CONNECTING THE NANO COLOR CONTROL PANEL + NANO COLOR AUXILIARY PANEL............................................. 35
5.4. CONNECTING THE NANO COLOR CONTROL PANEL WITH NETWORK CONVERTERS C14 – VRS................................. 35
5.5. CONNECTING THE NANO COLOR CONTROL PANEL WITH THE iNEXT VLAN INTERNET MODULE .............................. 36
5.6. CONNECTING THE NANO COLOR CONTROL PANEL WITH VACS-1 AIR QUALITY SENSOR .......................................... 36
5.7. CONNECTING THE NANO COLOR CONTROL PANEL WITH THE VSHC or VSHW SENSOR............................................ 36
5.8. CONNECTING THE NANO COLOR CONTROL PANEL WITH VSHC or VSHW and VACS-1 SENSORS.............................. 37
5.9. CONNECTING THE VGRZH PREHEATER....................................................................................................................... 37
6. ATTACHMENTS
6.1. DATA SHEET / ENERGY LABELS ................................................................................................................................... 38
6.2. WARRANTY CERTIFICATE............................................................................................................................................ 42

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OPERATOR’S MANUAL
1. 1. IMPORTANT INFORMATION
Please read the Operating Manual carefully before assembling it or any other activity related to work with the device!
AWENTA shall not be liable for any damage resulting from incorrect operation, non-intended use or unauthorised repairs
or modifications of the product.
This installation manual is an essential part of the product and contains important technical information and instructions
regarding the occupational safety. Carefully read the operation and installation manual and keep it available in a readily
accessible place for future reference. The manual is also available at www.awentapro.pl
Safety precautions:
● This product can be used by children at least 8 years old, by people with impaired
physical and/or mental abilities, and by people without any experience in or
understanding of the operation of the product, if supervised or instructed by a
competent adult in the safe use of the product so that they understand the relevant
operating risks. This product is not a toy and children should not play with it. Children
should not be allowed to clean or maintain the product without supervision of an
adult.
● The unit is intended for a fixed indoor electrical installation provided with means or
devices having contact breaks at all poles, ensuring complete isolation under
category III overvoltage conditions in accordance with the regulations for such
installation. The device should be connected directly to an earthed 230 VAC mains
socket.
● When installing and using the unit, it is mandatory to observe the provisions specified
in this manual and all the applicable local and national building, electrical and
technical standards.
● It is mandatory to read all warnings in this manual and become familiar with the
warning signs located on the air handling unit, as they contain information for your
safety.
● Failure to follow the instructions and warnings contained in this manual may result
in personal injury and damage to the unit.
● If the unit is handed over/sold etc. to another user, this manual must also be handed
over.
● Assembly and repairs of the unit may only be carried out after it has been effectively
disconnected from the power network.
● It is forbidden to operate the unit beyond the temperature range specified in the user
manual, as well as in aggressive and potentially explosive environments.
● Do not place heating or other devices near the power supply cable of the unit.
● When connecting the unit to the power grid, it is absolutely forbidden to use the
damaged equipment, if the power supply cable is found to be damaged.
● The OHS rules must be observed, when using electrical equipment during the
assembly of the unit.
● Exercise care, when unpacking/unloading of the unit.
● Do not bend the power cord, avoid damaging it.
● The unit must be used only for its intended purpose. PE ЕС

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1.2. INTENDED USE
The unit is equipped with a cross-flow plate heat exchanger, electric heater (optional) and is designed to save thermal
energy by its recuperation, being one of the elements used in energy-saving technology systems. The unit is considered a
supplementary device and must not be used as a stand-alone, independent heating source.
The unit is intended for securing continuous air exchange by means of forced ventilation in houses, offices, hotels, cafés
and other residential and public premises, as well as for recuperation of heat energy from discharged air to heat up clean
air coming from the outside. The unit is not intended for industrial use, nor for use as an air treatment in swimming pools
or saunas.
Air flowing through the unit must not contain volatile flammable or explosive substances, chemically active vapours, dust
with large particles, soot, fats or media conducive to the formation of harmful substances (toxic substances, dust,
pathogenic microorganisms), sticky substances and fibrous materials.
The unit is designed for installation in a closed building, in the ambient air temperature from 0°C to +40°C, the relative
humidity of up to 90%.
WARNING! In the event of extremely unfavorable weather conditions (outside temperature below -10°C), it
is not recommended to use the air handling unit above 70% air flow. This may result in excessive cooling of
the room and incorrect operation of the device.
1.3. TRANSPORT AND STORAGE
Permissible storage and transport temperatures range from -30 to +60°C.
Transport and unpack the unit with care. Dispose of the packaging in an environmentally friendly manner.
1.4. SAFETY MEASURES REGARDING OPERATING OF THE UNIT
● Always and absolutely observe the safety regulations, warnings, comments, and cautions as recommended herein.
Failure to observe the safety regulations, warnings, and cautions and instructions in this document may result in personal
injury or damage.
● Do not touch the control panel or the electric feeder box with wet hands.
● It is forbidden to operate the unit with wet hands.
● The use of a high-pressure washer or water jet to clean the control panel is prohibited.
● Avoid any contact between the electric parts of the unit with water.
● It is not allowed to block the inlets and outlets of air conduits, when the unit is in operation.
● Maintenance of the unit may only be carried out, after it has been effectively disconnected from the power network.
● Children must not be allowed to use the unit without adult supervision.
● Avoid damage to the power supply cable, during use.
● It is forbidden to place any objects on the power supply cord, which could cause abrasion, cut or other damage to the
cord.
● It is forbidden to store explosive or flammable substances in the vicinity of the unit.
● It is forbidden to open the unit, when it is in operation.
● If there are strange, unusual sounds, odour and smoke, immediately turn the control panel off and contact the service
centre.
● The installation of the unit must always be carried out in compliance with the general and local construction, safety and
installation regulations issued by the relevant official institutions and the energy and water supply companies.
● The unit should be connected to the ventilation system before commissioning. Ventilation ducts provide protection from
access to rotating fan blades. The ducts shall be secured against slipping off its connections in a manner requiring the
use of tools.

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1.5. TECHNICAL SPECIFICATION
Specifications:
ZEPHYR 405
ZEPHYR 605
Supply voltage
230 V AC / 50 Hz
Maximum power consumption
(without preheat coil)
330 W
405 W
Preheat coil power
2000 W
Electrical protection class
I
IP protection class
IP24
Capacity (at 100 Pa)
417 m3/h
616 m3/h
Max. motor speed
4000 rpm
2400 rpm
Noise level
51.8 dB(A)
40.1 dB(A)
Type of heat exchanger
Cross-flow plate heat exchanger
Max. heat recovery efficiency
up to 95%
Heat exchanger material
Polystyrene
Housing material
EPP + powder coated steel
Filter – intake vent
M5 ISO ePM10
(optional F7 ISO ePM1)
Filter – exhaust
M5 ISO ePM10
Pre-filter intake/exhaust
VFWZH (optional)
Diameter of air
connections
158 mm
198 mm
Diameter of condensate drain connector
16 mm
Mounting position
Horizontal – under ceiling
Weight
35 kg
Controller type
AERO 4 + NANO COLOR
Dimensions
Dimensions [width x length x height]
808 mm x 1205 mm x 430 mm
Bypass
Automatic (100%)
Fans
2x radial fan with EC motor
Internet module
Optional
Air quality sensor
VACS-1 (optional)
CO2 concentration and humidity sensor
VSHC (optional)
Humidity sensor
VSHW (optional)

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1.6. TECHNICAL DRAWING

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1.7. BASIC COMPONENTS OF THE UNIT/LAYOUT OF CONNECTIONS
1.
Fans
2.
Heat exchanger
3.
By-pass dampers
4.
Air filters
5.
6.
Preheater (optional)
EPP housing
Connection ports designation:
INTAKE – outdoor air intake duct
EXHAUST – used air exhaust duct
EXTRACT – duct removing used air from rooms
SUPPLY – duct supplying air to rooms

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1.8. OPERATION PRINCIPLE
Fresh air is drawn in with the air intake located outside the building. Then, using ventilation ducts, the air is transported
to the air handling unit. After filtering, it flows to the heat exchanger where heat energy exchange from the exhaust
stream takes place. The air is heated in winter and cooled in the summer. Next, the supplied air flows to the so-called
“clean” areas such as a living room or bedroom.
Used, polluted air is extracted from the so-called “dirty” areas such as a toilet, bathroom, kitchen or laundry by means of
exhaust grilles or diffusers, and then directed to the air handling unit by means of exhaust ducts. After filtering, it goes
to the heat exchanger, where the heat or cold is “recovered” from the used air. The air is then moved to an outlet
located outside the building.
1.9. ITEMS OF EQUIPMENT
The standard accessories of the unit include the following:
● Cross-flow plate heat exchanger.
● M5 class supply and exhaust air filters.
● EC fans: centrifugal fans (supply and exhaust) with maintenance-free electric motors with electronic commutation and
a built-in thermal protection.
● NANO COLOR remote control panel which is connected, with a communication cable, to the control system, located
inside the electric compartment of the air handling unit.
1.10. INSTALLING AND PREPARING THE UNIT FOR OPERATION
Installation of the air handling unit
● The panel should be attached to the ceiling in a horizontal position. Installation should be done with original brackets
equipped with anti-vibration dampers.
● Use anchor bolts suitable for the surface type for installation. Check whether the mounting structure can support the
weight of the unit. Otherwise, the location intended for installation must be reinforced with additional beams. The unit
must be installed on a rigid and stable surface.
● The unit should be installed in such a way that it will be possible to freely open the unit for the replacement of filters,
cleaning the exchanger and perform fan maintenance.
● Make sure the power supply system is suitable for the maximum power of the appliance. The permissible intake air
temperature is between -20 and +500°C. Make sure the mounting location is free from frost.
● The air handling unit should be installed in rooms where the temperature is min. 0°C.
Minimum lengths of ventilation ducts
During installation, it is necessary to provide minimum access to the unit for maintenance or repair purposes.
To ensure the best efficiency of the air handling unit and to reduce aerodynamic losses due to turbulence, it is
recommended to install a straight section of air duct at the entry and exit of the unit.
The minimum recommended lengths of such straight sections:
- 25 cm of an air conduit at the inlet side;
- 60 cm at the outlet side.
In case of lack or short air ducts on one or several ports of the air handling unit it is necessary to protect the unit's internal
parts against entry of foreign objects, for example, install a protective grid or other device with mesh size not larger than
12.5 mm, to prevent free access to the fans.
If the source of noise is where the spiral air duct is connected, replace the spiral air duct with a flexible duct to avoid
resonance. Flexible inserts can also be used to prevent resonating.

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Draining of condensate
The condensate drip tray provided with a pipe to drain the condensate outside the unit.
The condensate drain pipe should be connected to the building's drainage system via a trap. The pipes have to be arranged
with a slope of approximately 2%.
NOTE: Fill the drain system with water, before connecting the unit to the power network! The drain trap must be filled
with water during operation at all times.
Make sure that water flows into the drain, otherwise condensate may accumulate inside the unit when the recuperator
operates, which in turn may damage the unit and cause water leakage into the room.
The condensate drain system must be used in all rooms, in which air temperature is above 0°C! If the room temperature
is below 0°C the condensate drainage system has to be thermally insulated and equipped with a heating device to prevent
it from freezing.
ATTENTION! Condensate drainage is also recommended in air handling units with an enthalpy exchanger, as in special
cases a small amount of condensate may accumulate.
Connecting to the mains power supply
The unit must be connected to a 230 V/50 Hz single-phase AC power supply network, using the original power cord
provided with the unit. Before connecting to the mains, check the cable for any mechanical damage caused by crushing,
cutting etc., which may result in an electric shock.
The unit must be connected to the power network, in compliance with the regulations and standards in force.
NOTE! Before performing any work on the control panel, it is absolutely necessary to disconnect it from
the power supply. The control panel should be connected to a properly installed socket equipped with an
earthing contact. The panel ratings are given on the manufacturer's factory label. Any changes to the
internal connection are prohibited and will void the warranty.
Installation of air ducts
● The ventilation ducts should be secured against slipping from the connection stubs with cable ties.
● The distance between the air intake and the outlet should be at least 1.5 m.
● The air intake should be located on the shadiest side as far as possible from sources of stale air (street, chimney, etc.)
● Install the exhaust air duct with a slope to the unit.
● All ducts should be insulated to avoid inside condensation and excessive moisture accumulation.
● When installing the ducts, minimise the number of sharp bends, etc., to reduce resistance of the ducts.
● The ducting should be airtight. Use fittings with gaskets or seal the joints with e.g. adhesive aluminium tape.
● To reduce the transmission of vibrations and to make the unit run more quietly, connect it to the system with flexible
dampers on the intake and exhaust sides.
● The installation should follow a design prepared by an authorised designer.
● Make flow adjustments on the diffusers, based on measurements taken with an anemometer according to the air
balance obtained.
● Ceiling diffusers should be installed min. 30 cm from the walls.
● To ensure adequate flow between rooms:
- The gap under the internal door should have a minimum surface area of 7600 mm2
- At least 10 mm gap under a standard internal door with a width of 760 mm
- Do not cover the openings as this will disturb air circulation
● Recommended duct thickness depending on ambient temperature:
Air duct type:
Ventilation duct ambient temperature
from -20°C to 0°C
from 1°C to 14°C
from +15°C to 20°C
Insulation thickness for a given temperature range
Supply
20 mm + (200 mm)*
50 mm
20 mm
Extract
20 mm + (200 mm)*
50 mm
20 mm
Intake
50 mm
50 mm
50 mm
Exhaust
20 mm + (200 mm)*
20 mm
20 mm
*20 mm mineral wool insulation covered with aluminium foil on one side + a minimum of 200 mm of mineral wool as a
covering or casing for pipes laid in the attic without thermal insulation.

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1.11. MAINTENANCE
It is absolutely necessary to disconnect the control panel from power supply before performing any maintenance
operations.
Filter replacement/cleaning
Fouled filters increase air flow resistance which reduces the amount of air supplied to the rooms, and increases power
consumption by the fans.
The filters should be cleaned as they become dirty, but at least 3-4 times per year. It is permitted to clean the filters with
a vacuum cleaner. After cleaning twice, the filters should be replaced with new ones.
Fan maintenance (once a year)
Even with regular maintenance of the filters and recuperator, dust deposits may accumulate in the fans, which reduces
the efficiency of the air handling unit and the amount of air supplied to the rooms.
Use a soft cloth or brush to clean the fans. In order to avoid possible damage to the rotor, do not use water, chemically
aggressive solvents, sharp objects etc.
Heat exchanger maintenance (once a year)
Even with regular filter maintenance, dust deposits can form in the unit. In order to maintain high heat transfer efficiency,
the heat exchanger should be cleaned regularly. Remove the heat exchanger from the air handling unit and wash it with
warm water solution of neutral detergent, then reinstall the dried heat exchanger.
Maintenance of the condensate drain system (once a year)
The condensate drain system (drain pipe) may be contaminated by particles from the evacuated air. Check the function of
the drain pipe, by filling the drain tank with water and, if necessary, removing dirt from the drain trap and drain pipe.
Maintenance of air intake and exhaust ducts (twice a year)
Leaves and other impurities can clog ventilation grates and reduce both the efficiency of the unit and air flow. Check the
ventilation grate twice a year and clean it, if necessary.
Maintenance of the air ducting (every 5 years)
Even if all the aforementioned maintenance activities of the air handling unit are performed properly, dust deposits may
build up inside the air ducts, which reduces the air handling unit's efficiency. Air ducts are maintained by periodic cleaning
or changing them.
1.12. PREHEATER
The unit is equipped with a preheater which is one of the means of preventing freezing of the heat exchanger when
temperatures outside are negative. Other defrosting methods include temporary stopping of the supply fan or opening
the by-pass damper.
Preheater installation procedure:
● Unfasten the clamps and then remove the unit main hatch;
● Slide the preheater into the guide closest to the bypass hatch;
● Make the electrical connection at the preheater junction box;
● Unscrew the electronics cover screws;
● Remove the electronics cover;
● Attach the heater solid state relay in the electrical compartment;
● Attach the heater relay in the electrical compartment;
● Make the electrical connections in accordance with the diagram shown in the CONNECTIONS DIAGRAMS section
● Configure the service settings
- preheater (set to “PWM operation”)
- defrosting temperature (default 5°C)
- defrosting method (set to HEATER)
- defrosting control range (default 1.5°C)
NOTE: A missing or damaged ejector sensor shuts down the heater.

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1.13. WASTE MANAGEMENT NOTICE
. P
Do not dispose of waste electrical equipment with household waste.
The crossed-out wheelie bin symbol on this product that it is waste electrical an electronic
equipment (WEEE) at the end of its operating life and shall not be disposed with household waste.
The crossed-out wheelie bin symbol specifies that the product is subject to obligatory waste
segregation schedules for proper disposal. The product is made from recyclable materials and
components. The product user shall is required to return the product which has become WEEE to a
WEEE collection unit. The operators of WEEE collection units, including local WEEE locations,
product resellers and other WEEE collection locations managed by local authorities form a proper
waste disposal system. Proper WEEE disposal helps avoid harmful effects to humans and the
environment from the risk caused by hazardous components this product may contain. Your
household can make an important contribution to the recovery and recycling of WEEE. This
contribution fosters a behaviour which helps conserve the natural environment, which is a common asset for the mankind.
Households are among the leading consumers of small appliances and equipment. A rational management of operation
and disposal of small appliances and equipment will contribute to efficient recycling.

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NANO COLOR CONTROL PANEL
2.1. OPERATION PRINCIPLE
The NANO COLOR determines the set room temperature and ventilation performance based on the selected operating
program.
Possible programs:
● By clock zones. You can set up two Comfort operation zones and one Out of Home zone (no is one in the apartment).
Outside of these zones the Economy zone applies.
● Holiday mode. As above, but according to a separate daily program.
● Manual mode. One manually set temperature and one ventilation rate apply all the time.
● Out of Home. The settings as for the Out of Home zone apply all the time. This mode can only be set with the
thermostat number 1. The other thermostats adopt this mode from the thermostat number 1. Cooling in the Out of
Home program is turned off.
The set and ventilation temperature can still be affected:
● Enabling the URLOP mode. The thermostat and ventilation work as in the Out of Home mode.
● The Out of Home EXT signal, e.g. the one coming from a control panel. The thermostat and ventilation work as in the
Out of Home mode.
The difference between the HOLIDAY and the Out of Home in NANO 1 and Out of Home in the EXT software lies in different
interpretation of these states by the remaining equipment, e.g. the HOLIDAY mode switches off the DHW generation in
boiler controllers and heat pumps, while solar collectors stop accumulating heat and switch to the collector overheating
protection mode.
All of the above modes can only be set to NANO number 1. NANO1 then transfers them to the other NANOs and other
devices.
NANO COLOR can work in one of the three system operation modes:
● WINTER - NANO COLOR functions as the heating thermostat. The related equipment tends to achieve the set
temperature in the room, e.g. switching on the heating. The ventilation heats up the supplied air to the appropriate
temperature. The particular reaction depends on the configuration of the related equipment
● SUMMER – heating and cooling functions are off
● COOLING – heating is off. NANO COLOR functions as the cooling thermostat. The related equipment tends to cool the
room to the set temperature, e.g. by switching on fan coils, supply air cooler, opening the recuperator BY-PASS if the
conditions so require. The HOLIDAY, Out of Home and Out of Home EXT modes block the cooling operation.
The system operation mode can be changed manually or can change automatically depending on the outside
temperature.
2.2. INSTALLATION
General
The work related to connecting and assembling should only be carried out by persons with the appropriate qualifications
and permissions, and in line with the valid standards and regulations.
NOTE: Any connection work must only be carried out when the supply voltage is isolated, make sure that the electrical
conductors are isolated.
Power supply
The NANO COLOR control panel should be powered directly from AERO 4 controller outputs marked with “U” and “G”
symbols (12 VDC)
Connecting
The NANO COLOR control panel should be wired with a conductor of the minimum cross-section of 0.5 mm2 according to
the diagram in section CONNECTION DIAGRAMS. The minimum distance between conductors connecting the panel with
the module and other devices connected to the C14 network and parallel conductors supplied with 230 VAC is 30 cm. A
shorter distance may cause communication interference or damage to the device.
The following figure shows an example of a C14 network connection.

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NOTE: In order to ensure smooth data transmission it is necessary
to install a ferrite filter on the power and communication wires
between the AERO module and the NANO COLOR thermostat.
When leading the conductors through the filter loop them around
the ring as shown in the photo at the side.
Installation site
The NANO COLOR control panel should be installed at the height of about 150 cm from the floor, away from sources of
heat (e.g. radiators, TV set) and cold (e.g. external doors).
Installing the NANO COLOR panel:
● Place a 4 x 0.5 mm2 cable between the air handling unit and the control panel installation location
(the control cable should be led through one of the grommets located in the control panel electronics cover);
● Unscrew and remove the electrical compartment cover of the control panel;
● Make the electrical connection to the AERO4 controller (see the DIAGRAMS AND CONNECTIONS section);
● Screw the control panel bracket to the wall at a prepared location;
● Make electrical connections to the NANO COLOR panel (see the DIAGRAMS AND CONNECTIONS section)
● Clip the control panel into the holder;
● Install the electrical compartment cover
2.3. DESCRIPTION OF THE MAIN SCREEN
NANO COLOR

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1
Digital communication indicating via C14 protocol, flashing orange dot indicates that
communication is in progress.
2
Menu button.
3
Operating mode button. Depending on the configuration, one of the following symbols will appear:
Operation without a thermostat and ventilation.
Operation with a thermostat.
Operation with ventilation.
Operation with a thermostat and ventilation.
4
Installation mode button. Depending on the selected mode one of the icons shown below is displayed:
Winter (heating).
Summer (without heating and cooling).
Cooling.
5
EX4 module (displayed when the option is enabled).
6
Screen button for detected devices (support for additional devices).
7
Fireplace mode. Activation of the FIREPLACE function in the ventilation service menu is required.
Fireplace operation mode enabled.
Fireplace operation mode disabled.
8
The symbols appear for the enabled thermostat operation with heating and/or cooling. In the INTAKE TEMPERATURE
CONTROL MODE, the ROOM option should be set in the ventilation service menu.
Signal to other devices that the room is not heated enough and the heating needs to be turned
on.
Signal to other devices that the room is at the correct temperature (grey).
Signal to other devices that the room is overheated and cooling needs to be turned on.
Signal to other devices that the room is at the correct temperature (grey).
9
Ventilation on/off button.
It has to be turned on in the service parameter NANO / ON-OFF VENTILATION ON THE FIRST SCREEN.
Ventilation is switched on (green).
Ventilation is off (red). In addition to that, “OFF” will be displayed in field 14.

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10
The current reading of the information configured in the service parameter NANO / GENERAL INFORMATION.
11
Current room temperature setpoint. Activation of the thermostat operation in service parameter VENTILATION /
THERMOSTAT FUNCTION (Heating, Cooling, Heating+Cooling) is required.
12
Air quality and humidity. When pressed, a screen appears where detailed air parameters can be
viewed. They are visible when sensors are connected.
See section 2.11. for a detailed description.
13
Press to display a chart of the outside temperature variations over the last 24 hours, including
the minimum and maximum temperatures recorded during that time. This information is not
displayed if there is no outside temperature sensor.
14
Current ventilation operation status.
15
Current ventilation run. Displaying “OFF” means that the ventilation is switched off with
the button 9.
16
Current ventilation operation mode (scheduled, holiday, manual).
17
Current work zone (comfort, eco, out of home, holiday).
18
Current operating status of the thermostat.
19
Current operating status of the thermostat (schedule, holiday, manual).
20
Current work zone (comfort, eco, out of home, holiday).
21
Clock. Press to display the date and time setting screen
2.4. OPERATION MODE
When the mode selection button (button 3 of the main screen) is pressed the mode screen appears, depending on the
configuration.

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1
Moves to the thermostat and ventilation settings. See the SETTINGS section for a
detailed description.
2
Returns to the main screen.
3
Moves to the thermostat information screen.
4
Scheduled mode.
5
Holiday mode.
6
Manual mode.
7
Activation of the GHE in automatic operation mode or deactivation. The GHE
operation is possible after enabling the option.
8
Click to set the scheduled mode for the thermostat and ventilation simultaneously.
9
Click to set the holiday mode for the thermostat and ventilation simultaneously.
10
Moves to ventilation information screen.
11
Scheduled mode.
12
Holiday mode.
13
Manual selection of the ventilation operation mode.

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14
Enables the OUT OF HOME (NANO1) program.
15
Enables the HOLIDAY program.
16
Switches the BY-PASS to automatic mode, constantly closing or opening it.
17
Switches the ventilation to air mode. The option is invisible when the OUT OF HOME
(NANO1) or HOLIDAY mode is on.
2.5. SETTINGS
Clicking the button 1 from the OPERATION MODES section brings up the following screen:
1
Moves to the schedule settings.
2
Exit to the previous screen.
3
Sets the fan speed for the comfort zone.
4
Sets the fan speed for the economic zone.
5
Sets the fan speed for the OUT OF HOME mode.
6
Click to display the temperature setting screen. Appears after the option has
been enabled.

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2.6. TEMPERATURE SETTINGS
Clicking the button 6 from the SETTINGS section brings up the following screen. Use the and buttons to set the
desired temperature.
1
Setting comfort temperature.
2
Setting the economic temperature.
3
Seting the temperature in the OUT OF HOME mode.
2.7. THERMOSTAT INFO
After clicking the button 3 from the OPERATION MODE section, the screen will display the details of the currently
measured room temperature and the temperature setting.
2.8. VENTILATION INFORMATION SCREEN
After clicking the button 10 from the OPERATION MODE section, the ventilation screen shows a window with a graphical
representation of the exchanger.
NOTE: Depending on the connected devices installed in the air handling unit (heaters, coolers, AHU Kit), the screen may
differ from those shown in the manual.

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1
Exhaust temperature.
2
Exhaust fan rpm.
3
Ventilation run.
4
Supply fan rpm.
5
Temperature downstream the AHU Kit (only for the operating scheme 2).
6
Calculated intake temperature.
7
AHU Kit or cooler (only for the operating scheme 2).
8
Secondary heater (when the SECONDARY HEATER CONTROL function is enabled).
9
AO4 rpm.
10
Air supply temperature.
11
Intake temperature.
12
Preheater (when the defrost method is set using the preheater).
13
Temperature upstream the recuperator (when the MINIMUM TEMP. BEFORE THE RECUPERATOR function is
enabled)
Note: An additional temperature sensor downstream the preheater is required.
14
Exhaust air temperature.
15
Ground-air heat exchanger – open.
16
BY-PASS – open.
17
Measured air exhaust flow. FUNCTION IS NOT AVAILABLE FOR THIS EQUIPMENT VERSION.
18
Measured intake airflow. FUNCTION IS NOT AVAILABLE FOR THIS EQUIPMENT VERSION.
19
The set value of the exhaust airflow. FUNCTION IS NOT AVAILABLE FOR THIS EQUIPMENT VERSION.
20
The set value for the intake airflow. FUNCTION IS NOT AVAILABLE FOR THIS EQUIPMENT VERSION.
2.9. FIREPLACE MODE
The fireplace, when enabled, increases the supply fan speed in relation to the exhaust fan by the value set in the parameter
FIREPLACE RPM CORRECTION. Activating the mode disables the RECUPERATOR DRYING function.
NOTE: The installation has to meet the following requirements for the mode to operate correctly and safely:
• for the BY-PASS, it is forbidden to set the simplified operation mode;
• it is forbidden to set the speed of the exhaust fan higher than that of the supply fan – it applies to each speed;
• it is forbidden to set the exchanger defrosting by switching off the supply fan;
• it is forbidden to set the exchanger defrosting by switching on the pre-heater and reducing the supply fan speed by 50%.
2.10. CHANGING THE SYSTEM OPERATION MODE
Changing the operation mode of the system can be done manually or automatically. The method is selected in the
parameter WINTER/SUMMER MODE CHANGE METHOD.