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Documentation EvoAir A900ST G3
Updated: 10 March 2026
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HRV Ventilation Unit

EvoAir A900ST G3

Article number:
30901
Innovation
Made in Sweden
Performance
Emblem with the Swedish flag
Forest
Businesswoman with tablet in a meeting taking place in the background
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Brochure

Art. no.: 30901
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EAN: 7350072460565

EvoAir A900ST G3 is a unit with both side and top connection for high installation flexibility. The unit has six duct connections, four of which are used in operation, and inspection hatches on both sides. The choice of duct for supply and extract air fans is made directly in the control panel and allows up to 16 connection variants.

Characteristics

  • For offices, schools and business premises
  • Both side- and top-connected channels
  • Up to 16 connection variants
  • EvoControl Touch and cloud service
  • Inspection hatches on both sides
  • Configurable H/V connection

Full product information is available at www.acetec.se

Ventilation unit EvoAir A900ST G2

EvoAir ventilation units are manufactured and quality assured in Älvsbyn, Sweden.

Technical data

SpecificationValue
Connection optionsSide/top
Flow range (l/s)150 to 1100
Customisable H/VYes
Control equipmentEvoControl Touch
Type of heat exchangerRotating
PlacementFloor
W x H x D (mm)1355 / 1160 / 950 (882 without doors)
Weight (kg)200
Duct connection (mm)6 x 400
Fan power (W)2 x 1500
Connection voltage (V)3 x 400
Hedging (A)10

For technical advice or to request a quote, please contact sales@acetec.se

Acetec
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Product catalogue
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EvoAir A900ST G3

Pressure and flow diagrams

Pressure and flow diagrams

Product dimensions

Dimension sketch
DesignationDimensions (mm)
A950
B882
C1160
D475
E275
F100
G250
H1355
Acetec
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Product catalogue
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EvoAir A900ST G3

See designations in the illustration above.

Installation Instructions

Art. no.: 30901
•
EAN: 7350072460565

General

Installation and commissioning shall be carried out by qualified personnel with the necessary professional knowledge to ensure correct operation.

Suitable location is fan room, storage room or similar space. The unit can also be placed in a cold room.

The unit is equipped with inspection hatches on both sides and has six duct connections, four of which are used depending on installation needs. The two connections that are not used are covered with the supplied covers. Via the control panel, the fans can be configured as supply and extract fans, allowing up to 16 different connection variants.

The heating coil and possibly the cooling coil are placed in the supply air duct.

Ventilation unit EvoAir A900ST G2

The minimum service space in front of the inspection hatch is 950 mm, to enable the replacement of all components.

Flow metering outlets

For each fan there are pressure measurement sockets for flow measurement:

  • A600S/T k-factor = 25.8 (l/s)
  • A900S/T k-factor = 32.2 (l/s)

Air flow l/s = √ differential pressure x k-factor
Differential pressure = pressure difference in measuring outlet (Pa)

Flow metering outlets
Pressure measurement outlet for flow measurement.

Heating and cooling battery

The electric battery is installed in the supply air duct and is provided with its own power supply. The electric battery is interlocked with an internal flow switch.

Water coil kit for heating and cooling contains duct coil, valve actuator, control valve and anti-freeze sensor. Supplied complete with connection instructions.

Commissioning

During commissioning, air flows should be adjusted so that the exhaust air flow is 10-15% higher than the supply air flow (negative pressure) for safe operation. Applies to all operating modes.

Acetec
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Product catalogue
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EvoAir A900ST G3

Connection variants

All connection variants below are possible with one and the same unit (EvoAir A600S/T and EvoAir A900S/T).

Selecting the connection variant

  1. Select the inspection page.
  2. Select the position of the supply and extract air fan using the control panel in parameter 100.
  3. Place the supplied covers on the connection sockets that are not used.
  • TL = Supply air
  • AL = Exhaust air
  • UL = Outdoor air
  • FL = Exhaust air
Acetec
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Product catalogue
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EvoAir A900ST G3

Important to consider when installing

  • Installation and commissioning shall be carried out by a person with sufficient professional knowledge to ensure proper functioning.
  • If the system is not commissioned immediately, all duct connections should be sealed inside the unit to prevent moist or cold air from entering and causing moisture damage.
  • All operating modes shall be adjusted (Spruce, Comfort and convenience and Forcing).
  • The control panel should be positioned so that the user has good access and overview in the event of an alarm.
  • The user/manager of the installation shall be informed of the location of the control panel and its functions.
  • The installer shall hand over the manuals and the guarantee certificate to the user/manager of the installation.
  • The product must be registered at www.acetec.se for the guarantee to apply.
  • Original filters must be used during the warranty period for the warranty to be valid.
Acetec
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Product catalogue
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EvoAir A900ST G3

Manual

Art. no.: 30901
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EAN: 7350072460565
See the technical manual here!
QR code

EvoControl Touch

Control is via a 4.3-inch colour panel with touch display, providing a clear and intuitive user experience. The system has a wired network connection for stable communication and also offers a cloud solution with a responsive design that automatically adapts to mobile phones, tablets or computers. Advanced functionality allows you to control the indoor climate with high precision, customise operation as needed and monitor the system in real time.

EvoControl display

Components

EvoControl Touch consists of the following parts:

Display

EvoControl interface
4.3” colour panel with capacitive touch.

Main card

EvoControl circuit board
  1. Fuse 5x20mm, 200mAT, 230VAC
  2. RJ45 network socket
  3. Battery CR3225
  4. USB connector

Included

  • 15 m cable 4×0.25 mm² (max. length 50 m)
  • 4 plastic spacers
  • Screw (for surface mounting)

Installation of the display

The touch panel should be installed in a warm, weather-protected and dry area where it is clearly visible and easily accessible to the user. Avoid placing it in areas with high humidity or risk of condensation.

  1. Push the frame away from the display by holding the edges of the frame and pressing lightly on the display.
  2. Unscrew the four screws on the sides of the display.
  3. Fit the wall plate over any existing wall socket or on the outside using plastic spacers and screws.
  4. Connect the cable to the terminal block on the display.
  5. Cables can be released from the connector by inserting an object (e.g. a small needle) into the gap above the cable.
  6. Check that the cables are securely connected and that no strands are sticking out!

Would you like a more detailed description with pictures? Click on the link or scan the QR code at the top. See section 6.

Acetec
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Product catalogue
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EvoAir A900ST G3

EvoControl Touch display menu

Menu 1

EvoControl interface menu
  1. Heat recovery active / Reheating active / Cooling active / Defrosting active
  2. Temperature setting for active operating mode
  3. Activation of operating mode
  4. Indication of external operating mode, air quality control, fire, stop
  5. Various alarms (see alarms in technical manual), cloud service, network
  6. Go to Menu 2
  7. Activation of ECO function (parameter 400 must be activated)
  8. Activation of sleep mode (times must be set); to deactivate, press and hold the button for 2 seconds.
  9. Activation of overpressure function (fireplace function)
  10. Activation of forced hours
  11. Stop active, to activate hold button for 2 seconds / Other operating mode active or unit in standby (timer, external control)

Menu 2

  1. Display of measurement values in real time
  2. Time menu
  3. Alarm acknowledgement and history
  4. Service menu. PIN code 1 required
  5. Settings menu. PIN code 1 for normal settings and PIN code 2 for advanced settings required.
  6. System information
Acetec
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Product catalogue
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EvoAir A900ST G3

Quick guide to EvoControl Touch

This quick guide applies to standard units without accessories. For complete technical instructions, use the link on the first page of the manual or scan the QR code.

Step 1)

Press the button Menu button:
Symbol EvoControl settings

Step 2)

Press the button Preferences:
Symbol EvoControl settings

Step 3)

Enter the authorisation code 6374 for basic settings or 8990 for advanced settings and press Enter.

Step 4)

Press the button Fan:
Symbol EvoControl fan

Step 5)

  • Use the arrow keys to navigate to the parameters you want to change.
  • Use minus and plus to change the value.
  • Save the value with the button Save (only visible when the value is changed).
  • Pressures Back to go back to the start menu.
Interface step 1
Menu EvoControl control
Interface step 2
Interface - inside the menu button EvoControl control
Interface step 3
Interface - Entering the authorisation code EvoControl control
Interface step 4
Interface - Advanced settings
Interface step 5
Interface - Fan settings
- Parameter 100 is only changed on top-connected units, A600ST, A900ST, M1 and M2.
- It must not be changed on the A30T or on side-connected units.
- If you need to change between right-hand and left-hand versions on top-connected units, refer to the respective manual for the correct procedure.
Acetec
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Product catalogue
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EvoAir A900ST G3

Wiring Diagram

Art. no.: 30901
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EAN: 7350072460565
Wiring Diagram
Acetec
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Product catalogue
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EvoAir A900ST G3
Acetec
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Product catalogue
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EvoAir A900ST G3

Operation and Maintenance

Art. no.: 30901
•
EAN: 7350072460565

Before working with the unit

Only authorised personnel should operate and service the unit. This instruction applies to all units and describes operating principles, maintenance, troubleshooting and safety measures. The aim is to ensure a long service life, high operational reliability and energy-efficient operation.

The unit contains electrical and moving parts. Despite inbuilt protection, there is a residual risk of electric shock, crushing and cutting during service and maintenance. Always follow the instructions.

General about the unit

The unit is intended for comfort ventilation and air treatment. Operating temperatures, humidity limits and environmental requirements vary depending on the model. The unit should be located in a dry and easily accessible environment. Avoid operation in corrosive or explosive environments.

Service intervals and inspection schedule

Carry out servicing at least twice a year or more often at high load. Supplement with intervals for specific components as below:

  • Filter byte: every 3-6 months or after a defined number of operating hours.
  • Checking seals and mouldings: each service.
  • Checking fan bearings and motors: annually.
  • Cleaning of rotor or heat exchanger: annually.
  • Control of sensors and control systems: annually.

See service procedure (cleaning, dismantling, etc.) on the next page.

Acetec
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Product catalogue
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EvoAir A900ST G3

Service procedure

The unit contains electrical and moving parts. Despite inbuilt protection, there is a residual risk of electric shock, crushing and cutting during service and maintenance. Always follow the instructions.
  1. Switch off the power to the unit via fuse or plug before servicing.
  2. Secure the unit against accidental re-connection during work.
  3. Wait until all moving parts have come to a complete stop before starting work.
  4. Use personal protective equipment such as protective gloves and goggles. When working with dust, wear a respirator.
  5. Mark the unit with a warning sign during servicing.
  6. Open inspection hatches or panels (e.g. loosen screws with a suitable Allen key).
  7. Take old filters straight out of their mounts.
  8. Vacuum the inside and clean surfaces with a mild detergent (avoid strong solvents).
  9. To facilitate internal cleaning, fans fitted with electrical connectors can be removed from the unit (document electrical connections before dismantling components).
  10. If necessary, clean the rotor or heat exchanger unit according to the recommended method.
  11. Check seals, gaskets and mouldings.
  12. Fit new filters and reassemble components correctly. Original filters can be ordered at www.acetec.se
  13. Check that everything is secure and close the hatches.
  14. Reinstall all guards and ensure proper operation before putting the unit into service.

After completion of the service

  1. Reconnect the power.
  2. Switch on the unit.
  3. Check air flow, fan speed and pressure balance.
  4. Review alarm logs and any error indications.
  5. Listen for sounds or vibrations.
  6. Check operation in different modes (high/low, bypass, etc.).
Acetec
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Product catalogue
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EvoAir A900ST G3

Troubleshooting and malfunctions

In case of a malfunction, check the following points before contacting customer support:

  • No operation: check fuses, power supply, plug.
  • Low airflow: check filters, fan motors and belt tension.
  • Abnormal sound or vibration: check fasteners, bearings and balance.
  • Error indication from sensors: check the cable, sensor and connections.
  • Control system failure: check communication and parameters.
If problems persist, contact Acetec technical support.

Documentation and spare parts

All service measures must be documented in a service log with the date, signature and measures taken. Only use original spare parts and original filters to maintain the warranty.

Filters, fans and other components can be ordered at www.acetec.se

Technical Data Sheet

Art. no.: 30901
•
EAN: 7350072460565
SpecificationValue
Terms and conditions of guaranteeAG20
ECYes
EcoDesignYes
EuroVentNo, it is not.
Control equipmentEvoControl Touch
Cloud serviceYes
Flow range (l/s)150 - 1100
Cooker hood (accessory)No, it is not.
CO2 sensor room (accessory)Yes
Connection optionsSide/top
Customisable H/VYes
PlacementFloor
Installation in a cold roomYes
Duct connection (mm)6 × 400
Type of heat exchangerRotating
Power, fan, nom (W)2 × 740
Connection voltage (V)3 × 400
Hedging (A)10
IP classIP21
Built-in electric battery EVNo, it is not.
Electric battery kit EV (accessory)Yes
Electric battery kit FV (accessory)No, it is not.
Water battery kit (accessory)Yes
W x H x D (mm)1355 / 1160 / 950 (882 without doors)
Weight (kg)200
Filter classF7
Coatings / MaterialsMagnelis
Corrosion classC4
Acetec
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Product catalogue
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EvoAir A900ST G3
Email
sales@acetec.se
www.acetec.se
Phone number
010-28 80 110
(+46) 10-28 80 110
Address
Fabriksgatan 9
942 36, Älvsbyn, Sweden
Subject to possible printing errors. Swedish version applies in case of discrepancy.
Date of issue: 10 March 2026
Acetec AB is a manufacturer of dehumidifiers, ventilation units and air purifiers. All development, manufacturing and quality assurance takes place in Älvsbyn, Sweden. This document portal is intended to make it easier to find resources such as technical manuals, operating instructions and all other documentation.
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