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2.7.2. Bypass control
The ventilation unit is equipped as standard with a bypass valve in
the exhaust air line. This makes it possible to control what happens
to the (warm) exhaust air from the dwelling.
When the valve is in the normal position (closed), the exhaust air
from the dwelling passes through the heat exchanger and
exchanges heat with the cold supply air from outside.
If the valve is opened, the exhaust air no longer passes through the
heat exchanger, so there is no heat exchange. Although the outside
air still passes through the exchanger, the supplied outside air is
not warmed. This is desirable when it is warmer inside than outside
in the summer.
If in the summer it is cooler inside than outside, it is desirable to
cool the incoming air ("cold recovery"). In this case, the valve is
closed so that the relatively cool indoor air passes through the
exchanger.
The position of the bypass valve is determined automatically based
on the measured outdoor air temperature and exhaust air
temperature.
2.7.3. Frost control
The ventilation unit has an automatic control (frost control) that
protects the heat exchanger of the ventilation unit against freezing.
If the measured outside air temperature is lower than -1°C, the fan
is slowed down in stages and ultimately stopped.
When the ventilation unit has been stopped by the frost control, it only
responds to the timer control.
The frost control periodically checks whether the temperature has risen
enough for the ventilation unit to be switched back on.
To ensure that the ventilation unit continues to operate and provide
adequate ventilation when the outside temperature is below -1°C,
you can use preheated supply air from one or more sources or mix
warm air from the dwelling with cold air from outside.
2.7.4. Dirty filter control
The controller of the ventilation unit uses a smart counter to keep
track of when the filters need to be cleaned or replaced. This
counter takes into account air quality, the service life of the filter
and the fan speed. If the system detects that a filter is dirty, the
ventilation unit sends a wireless message to this effect. This
message can be displayed on specific paired control devices, such
as the RF status indicator control.
2.8. Recycling
This product was manufactured using sustainable materials. It
should be disposed of in a responsible manner at the end of its life
cycle. Your local authorities can provide you with information on
how to do so.
The product's packaging can be recycled. These materials should
be disposed of in a responsible manner in accordance with
government regulations.
As a reminder of the need to dispose of batteries and electrical
household appliances separately, the product features a symbol
consisting of a crossed-out wheeled bin. This means that the
product should not be disposed of with the rest of your domestic
waste at the end of its life cycle. It must be taken either to a special
separate waste collection centre operated by the local council or to
an outlet specified by this service.
Any adverse effects on the environment and human health are
minimised by handling batteries and household appliances
separately. This ensures that the materials comprising the appliance
can be recycled, thereby saving a significant amount of energy and
raw materials.
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