FLEXIT 800110 Air Handling Unit and Automation User Guide
- June 12, 2024
- FLEXIT
Table of Contents
115702-05
2023-05
Nordic S2/S3
QUICK GUIDE
Air handling unit and automation
System description
The unit provides ventilation in the home.
It supplies fresh air to living rooms and bedrooms via valves, which are
normally located in the ceiling. At the same time used air is extracted from
the kitchen, bathroom, toilet and laundry room.
The unit contains a rotating heat exchanger that recovers around 80% of the
heat in the extract air and transfers it to the supply air when needed.
Control
Flexit GO app User manual Flexit GO (117078).
http://zumotools.flexit.no/scan/171031
For installer, see start-up guide (116628).
http://zumotools.flexit.no/scan/170296
For end user, see start-up guide (116908).
http://zumotools.flexit.no/scan/170297
NordicPanel control panel (accessories)
For installation, see manual (120018).
http://zumotools.flexit.no/scan/174927
NordicPanel can be fitted to Nordic units manufactured after 1 October 2022.
Just check for a cable on top of the unit marked “NordicPanel”. You can also
install NordicPanel on older units manufactured between May 2019 and September
2022. All you need is a cable kit. Contact your nearest dealer for more
information.
Consequences of incorrect operation
Condensation. A lot of moisture is often generated in wet rooms as a
result of drying clothes, showering, etc. If the outdoor air is cold, it will
cool the walls down and the moisture in the indoor air could condense on the
unit. If you experience this, you must increase ventilation to Max when a lot
of moisture is being generated.
Increased ventilation will ensure that the humid air is extracted from the
room and replaced with drier air.
Filters. Old and blocked filters provide poor ventilation and can also
cause condensation problems.
New homes. New homes give off large quantities of moisture and gases from
textiles, building materials, paint, etc. This is known as off-gassing and can
cause discolouration of walls and surfaces in the home.
Ventilation is therefore very important!
Maintenance
DANGER! The unit must be unplugged from the mains before any maintenance is carried out. Then wait a few minutes for the fans to stop.
Cleaning the fans
If the fans are to retain their capacity, it is important to ensure that they
are clean. This is particularly important for systems that are connected to a
kitchen hood. The fans therefore have to be removed for an annual inspection
and cleaned if any dirt and grease have built up on the fan blades. Clean the
fan blades with methylated spirits on a cloth or brush and, if possible,
compressed air.
NB! Make sure that the motor is not exposed to water.
Function check
When maintenance is being carried out, the system should be checked to make
sure that important parts are working properly:
Fans
Set the unit to Max and check that the supply air valves are blowing and the
extract air valves are sucking.
Rotor
It is vital that this should rotate when there is a need for heat recovery,
e.g. if the outdoor temperature is below 10°C. If the rotor is not working
properly, an error signal will appear on the control panel. Also check that
the air intake and exhaust are clear and not blocked by leaves and debris.
Changing the filters
Depending on how dusty the environment is, the filters will gradually
become blocked and let less air through. The filters therefore have to be
changed at least once a year (usually in the autumn).
Both filters (both supply air and exhaust air filter) should be
changed at the same time.
Documentation
For more information see the user manual and installation instructions
supplied with the product.
They can also be downloaded from www.flexit.com.
Keep the projection documents, including the ventilation drawings, in a safe
place.
The product is listed in the database for building products that can be used in Nordic Swan Ecolabelled buildings.
Flexit participates in the ECP programme for RAHU.
Check ongoing validity of certificate:
www.eurovent-certification.com
Flexit AS, Moseveien 8, N-1870 Ørje
www.flexit.com