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8. MAINTENANCE
8.1 Replacing Filters
When the filteralarm is displayed, the filters must be
changed. Stop the system by the circuit breaker of the unit
or by the circuit breaker on the terminal board. Open the
front cover/filter drawers and remove the filters. After
having changed the filters, reset the filter timer. The time
interval for cleaning/ changing the filters can be adjusted in
the operating menu. Based on normal environmental
conditions with clean air – a filter change is recommended
every 6 months for optimal working conditions.
Vacuum cleaning or using pressurised air on the filters is
not recommended.
Recommended filters to be used: Original Genvex filters in
quality Coarse / G4 = Standard filter (typically used on
extract air side) ; ePM10 / F5 = Fine filter ; ePM1 / F7 =
Pollen filter (typically used on fresh air side)
Please note that the following recommended annual
service of the ventilation unit internal components should
be done by an installer.
Condensation drain
When changing the filter in August/September before the
outside temperature falls to 5 °C, check that the
condensation drain is not blocked with dirt and make sure
that there is water in the water trap. Pour 1 litre of water
into the condensation tray and make sure it runs off freely.
If the condensation drain does not work, this could lead to
water damage in the home.
Heat exchanger
Inspect the heat exchanger every year. If it is dirty, remove
it and: - Alu-exchanger: Wash in lukewarm soapy water and
rinse using a hand shower if necessary. - Plastic exchanger:
No cleaning with solvents - use only clean water carefully
only careful dust removal from air intake surfaces with a
household vacuum cleaner.
Fans
Inspect the two fan wheels for dirt each year. If they are
dirty, they can be washed using a brush, bottle cleaner, etc.
Supply air and extract air valves: Clean the valves by wiping
with a dry cloth. Be careful that the valves do not turn, so
that the air volume changes.
8.2 Dismantling/taking the system out of service
Generally it is recommended to maintain a constant airflow
through the ventilation unit at all times to prevent
condensation in the ductwork.
In case of the ventilation system not being used for weeks.
The following must be done: The power supply, i.e. the
power cables, must be disconnected. Disconnect the
condensation outlet and power cables for any reheater/
preheater. Disconnect cables for the control panel and
dismantle ducts. If the system should to be taken out of
service, the ducts must be dismantled to avoid condensed
water in the system and in the ducts. Close all supply air and
extract air valves.
