Airfi 60 User manual

INSTALLATION AND OPERATING INSTRUCTIONS
MORE THAN PURE AIR
Model 60
Model 100
Model 130
Model 150
You get an easy-to-use weekly clock
and many other functions.
www.airfi.fi/app
Download the Airfi App
to your smart device.

3
Warnings and cautions 5
General information 6
General information in brief 6
Basic operation of the air handling unit 6
Controls 7
Fans 8
Heat recovery cell 8
Protective functions 8
Installation 10
Installation of ventilation ducts 10
Wall installation 10
Ceiling installation 11
Floor mounting set 12
Vapour barrier sealing plate 12
Condensate removal 12
Airfi water seal 12
Kitchen bypass 13
Electricity, control cables and controllers 13
Duct radiators 13
Controllers 14
Uno 14
Sento 14
Mille-Wire 14
Mille-Wifi 15
Airfi App 15
Airfi Cloud 15
Seven segment 15
Bus control 15
Exhaust hood controls 15
Commissioning 16
Air flow rates 16
Basic air flow control 16
Maintenance 16
Opening 16
Filters 17
Heat recovery cell 17
Fans 17
Cleaning the duct system 17
Condensation water 17
Airfi water seal 17
Other maintenance 17
Technical specifications 18
Dimensional drawings 19
Air flow 20
Potentiometric setup – Seven-segment 24
Other functions 26
Table of contents

4
Read the instructions for use, installation and
maintenance carefully before proceeding.
You can also download the instructions from our website:
www.airfi.fi. The document is intended for anyone
who services, installs or uses Airfi Oy’s air handling units.
We reserve the right to make changes.

5
NB:
This device is intended for use by adults. Children and persons
with physical, sensory or mental limitations should only use the
device with assistance.
Warnings and cautions
Installation
The installation of the air handling unit should only
be carried out by an authorised person. Installa-
tion must be carried out with care and in accor-
dance with the regulations and standards in force
for installation, adjustment and commissioning.
Electrical installation work
The unit must be disconnected from the mains
when carrying out voltage tests, insulation resis-
tance measurements or other operations on the
mains which may cause damage to sensitive elec-
tronic equipment.
Overvoltage protection
Airfi recommends a surge arrester for all Airfi
air handling units. Electrical installations must be
carried out by a professional and in accordance
with local regulations.
Opening the unit
Slide the Airfi cover strip to the side. The hatch is
opened using the screws under the cover strip,
either with a screwdriver or by hand (NB: special
care must be taken when using a screwdriver).
When carrying out maintenance work, always
make sure that the unit is disconnected from
the power supply. Unplug the unit or switch off
the power using the switch inside the unit. NB:
Switching the unit off from inside the unit will cut
off the power supply to the circuit board. There
is still voltage on the primary side of the service
switch. After power has been switched off, the
fans will continue to run for a while. Wait a few
minutes before carrying out any maintenance.
This ensures that the fans have stopped.
Drying laundry
We recommend that you do not connect a tumble
dryer or drying cabinet to the extract air of the
unit.
Condensation water and
condensation
In freezing temperatures, the surface temperature of the
unit can temporarily drop so low that moisture can con-
dense on the surface of the unit in humid conditions. Take
this into account with regard to fixtures near the unit.
Check the condensate drain pipe regularly to ensure that
condensation water can drain freely into the drain.
Commissioning
The unit should only be put into operation after the
dust-generating work on site has been completed. The
duct connectors of the air handling unit must be kept cov-
ered during transport, installation and storage. This keeps
the ducts and the air handling unit clean and allows the
unit to be commissioned without the need for additional
cleaning.

6
General information in brief
Basic operation of the air handling unit
General information
Enclosure The enclosure class of the unit is IP34 when the hatch is closed
Fans Airfi air handling units are equipped with energy-efficient EC
DC fans. The fans can be controlled steplessly.
NB:
On Airfi units, if a fan fails, you can disconnect the electrical
connections from the finger connectors located outside the pro-
tected electrical compartment.
Filter sets
Model 60-100-130:
Filter Set #1
Model 150:
Filter Set #2
Supply
ISO Coarse, 90% + ISO ePM 1 55% filters
(formerly G4+F7)
Extract
ISO Coarse, 90% filters (formerly G4).
Remember to replace the filters regularly, at least every six
months. Use original Airfi Oy filters. You can easily order filters
from our web shop:
www.airfi.fi/verkkokauppa
Heat recovery cell Heat recovery with counter-current technology in aluminium
construction. Does not transfer odours or moisture. Suitable for
all applications.
Condensation water tray The tilted inner floor improves the removal of condensation wa-
ter from the inside of the unit.
Buzzer alert Gives a beep through the air handling unit housing.
People are spending more and more time indoors, so it is important what kind of indoor air you
breathe. Airfi air handling units and exhaust hoods make the indoor air quality of your property ex-
cellent. Airfi’s continuous ventilation efficiently provides ventilation for your property all year round.
High-quality ventilation provides healthy indoor air in an energy-efficient way, without compromising
living comfort.
In densely built buildings, ventilation is even more important. Ventilation removes moisture from the
building. Ventilation prevents the transfer of moisture into structures and thus the growth of mould and
fungal spores. The heat from the extract air is recovered, increasing energy efficiency.

7
Controls
Speed #1 Long absence
You can set the air flow rate very low, for example, when you
are away for a long period of time.
Speed #2 Absence / Low load
You can set the air flow rate low and use this speed when your
home is not under much load.
Speed #3 At home / Normal load
It is recommended that the air flow rates in the relevant building
regulations be set for this speed.
Speed #4 Boost / High load
Used, for example, in a situation where the house has a slightly
higher than normal load.
Speed #5 Boost / Maximum load
Used, for example, in a situation where there is a large number
of people in the house, during a party, etc.
With mechanical ventilation, fresh outdoor air is brought into the building through the unit. The air han-
dling unit is equipped with efficient ISO Coarse, 90% + ISO ePM 1 55% filters (former designa-
tion G4+F7), which filter the air coming from the outside to the inside. Remember to replace the filters
regularly, at least every six months. On the extract air side, the heat exchanger is protected against dirt
by ISO Coarse, 90% filters (formerly G4).
The air handling unit heats the filtered supply air before it is released into the room. The incoming
outdoor air is heated primarily by the heat of the air leaving the heat exchanger. Fresh supply air at the
right temperature improves living comfort. Set the supply air temperature slightly lower than the room
temperature. This ensures fresh indoor air and the air coming in mixes more effectively with the air in the
room. The air handling unit must always be on. It only needs to be switched off for maintenance. This
will ensure that the property has adequate ventilation and good living comfort.
Airfi recommends setting the supply air temperature to +17°C. Too high a temperature setting will in-
crease energy consumption and the clean air blown into the room will not mix as well with the room air
compared to if the supply air temperature is 3–4 degrees lower. If low temperature air is to be blown
into the room, the risk of condensation in the duct system must be taken into account. This is why the
factory setting for the minimum supply air temperature is 15°C. Please note that the air handling unit
does not cool the supply air.
Tip!
If the duct system has been carefully insulated against condensa-
tion, even lower temperature air can be blown into the room.

8
Fans
Heat recovery cell
Airfi units use EC DC fans. Replacing a fan does not require a person with an electrical work licence.
The control and supply connections for the fans are fitted with plugs that do not present a risk of elec-
tric shock. Misuse is also prevented. The Model60/Model100/Model130/Model150 units are
equipped with pin plugs. When replacing a fan, switch off the power at the unit’s service switch.
Airfi air handling units use counter-current heat recovery technology. In the heat exchanger, fresh
air from the outside cannot mix with the air to be extracted. This prevents the transfer of odours and
moisture to the air inside the building. The heat exchanger can be easily removed from the unit and,
if necessary, washed with a mild soap solution and water (do not use a pressure washer). Make sure
that the heat exchanger is dry after washing before putting it back in the unit.
Airfi units also have a “cool recovery” function, which works if the home has, for example, an air-
source heat pump. The heat load of the home is not increased, but if necessary, for example, on a hot
summer’s day, the air entering the house is cooled by air extracted from the inside.
Airfi units also have an enhanced cooling function. The function must be activated by the user, after
which the unit will operate independently at the set values. After activation, the unit monitors tempera-
tures and boosts air volumes as needed depending on conditions. The fan speed during enhanced
cooling can be limited so that, for example, at night the fan does not run at maximum power but at the
maximum speed set by the user.
Airfi units also feature an advanced heat recovery bypass. The heat recovery cell can also be only
partially bypassed, allowing this feature to be used, for example, in spring when the outdoor tempera-
ture rises during the day.
Protective functions
Fault reports /
Buzzer
Airfi units are equipped with an alarm buzzer as standard. The
buzzer will sound to signal an alarm. The buzzer alarm is only
given for critical faults, for example, if a fan is broken or if an R
model unit is installed in an L model duct system.
The unit will continue to operate in a limited manner in the event
of a fault and will return to normal operation once the fault has
been rectified. You can search for a service centre in your area
at www.airfi.fi
Fan
overheat protection
The fans have built-in overheat protection. If the overheat pro-
tection mechanism is tripped, the fan stops. The mechanism is
automatically resettable, meaning that when the temperature
drops, the fan will restart.

9
Airfi Frost Pro System –
self-learning hoarfrost
protection
(AFPS)
AFPS technology is used to achieve A+ rated annual efficiency
in the Model 60, 100, 130 and 150 air handling units manu-
factured by Airfi Oy. AFPS is standard in all air handling units
manufactured by Airfi Oy. The new AFPS is a self-learning hoar-
frost protection system which guarantees excellent performance
during cold periods.
Airfi Frost Pro System is a Finnish invention, where the heat
exchanger is defrosted only when there is a need for it and the
heat exchanger is guaranteed to work even in prolonged freez-
ing weather.
The energy used to defrost the heat exchanger is taken from the
extract air. This way, the energy provided by the heating resis-
tors is used in the apartment rather than, for example, heating
the exhaust air with the front resistors.
The defrosting function is used optimally, saving energy com-
pared to older solutions. The self-learning capabilities make it
possible to take the individual characteristics of the air handling
unit into account, for example, how dirty the filters and heat
recovery cell are.
Electric heaters Airfi automation is equipped with automatic self-reversing over-
heat protection. If the temperature gets too high, the supply to
the resistor is cut off.
In addition, the unit is equipped with mechanical overheat
protection. If the mechanical overheat protection mechanism is
tripped, the unit’s electric heater cannot be switched on until the
overheat protection activation is acknowledged. When the me-
chanical overheat protection mechanism is tripped, the cause of
the tripping should always be determined.
Fire risk alarm The unit has a built-in fire risk alarm. The fans stop if the tem-
perature of the extract air exceeds +70°C or the temperature
of the supply air exceeds +50°C. The parameters are config-
urable. The fans start to run again when the temperature drops
(factory setting) or after reset.
This function can be disabled by setting the value to 0.
NB: You can select the acknowledgement method from the
Modbus. For example, in the event of a fire risk alarm, you can
choose whether the fans should start automatically or whether a
reset is required.

10
Installation
NB:
Before installing the unit, make sure that the hand-
edness of the unit matches the ducting of the site.
NB:
The supply air duct must be condensed if indoor
air is cooled through ventilation.
The air handling unit should be installed in a room with a temperature of at least +10°C and where
condensation drainage is possible. The air handling unit should not be installed on the wall opposite
the bedroom or living room wall. When installing, care must be taken to ensure that the electrical and
control cables are placed in an easily accessible location. The unit can be mounted on either a ceiling
or wall bracket. The enclosure class of the air handling unit is IP 34 with the hatch closed.
The air handling unit has an external terminal box where the actuator connections are made. Make
sure that the service hatch is no more than 1.6 m away from the unit.
Installation of ventilation ducts
Wall installation
Ventilation ducts and components are installed according to the HVAC plans. The installation of venti-
lation ducts should be carried out by an authorised installer. Correct and planned insulation prevents
heat loss, moisture condensation and fire spread in ventilation ducts. Even small defects in insulation
reduce sound absorption and pose a risk of condensation and indirect damage. The weight of the
duct system must not put a load on the unit. In order to avoid structure-borne noise, ducts must not be
installed directly against structures. In renovation projects, the insulation of the existing duct system
should always be checked and, if necessary, insulation should be applied.
It is not recommended to install the unit on a wall adjacent to the bedroom. Sound propagation can be
prevented, for example, by using a ceiling mount bracket.
The unit is mounted on the wall using an optional wall mount bracket. If the wall structure consists of
vertical bars and building boards, the fixing point must be reinforced with horizontal bars. This ensures
that the wall can support the weight of the unit. Airfi also recommends that the wall is insulated with
sound-absorbing material or equivalent to prevent sound transmission.
The instructions are general in nature. Install duct insulation according to the site plans.
Accessory
General guidelines on insulation
The supply air duct must always be carefully insulated between the unit’s duct outlet and the silencer,
so that the sound of the fan is not carried into the room. The supply air duct is insulated in a cold room.
»The exhaust air duct is insulated according to country-specific requirements (e.g. fire rating).
»In a warm indoor space, the outdoor air duct and the exhaust air duct are insulated and condensation insulation is also
installed.
»Extract and supply air ducts do not need to be insulated in warm indoor spaces (note the condensation insulation in
cooling).
The ducting through the vapour barrier to the attic must be done carefully. Silencers are placed in the
supply and extract air ducts as close as possible to the unit. Make sure that the duct outputs of the unit
you are installing correspond to the ducting of the site.