enervent Svea eAir - Page 24

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Carbon dioxide, humidity, and
temperature boost of fans
The fan power of the ventilation unit is controlled based
on load conditions and on the measurements collected
by the temperature, humidity and/or carbon dioxide
sensors.
The concentration of carbon dioxide and/or humidity
is kept below the limit value set in the control panel.
Humidity control manages the fans based on the internal
and possible external humidity transmitters in the
ventilation unit. The standard ventilation unit delivery
contains one built-in humidity sensor. Three carbon
dioxide transmitters and three humidity transmitters
can be connected to a ventilation unit. Transmitters are
optional extras.
Carbon dioxide, humidity and temperature boosting can
activate in Home mode. Humidity boosting can activate in
Away mode as well.
If humidity boosting is not sucient to remove humidity
from the rooms, the boosted humidity removal can be
activated from the settings menu (Settings > Boost >
Humidity Boost > Boosted humidity removal). When
humidity boosting is active, the boosted humidity
removal operates automatically if the outdoor
temperature is less than 0°C and the function has been
activated in the Settings menu. This function slows down
the rotation of the heat exchanger, which allows more
ecient humidity removal.
Supply air dehumidication is available for certain
ventilation units. The absolute humidity of supply air
remains on a level set in Settings > System conguration
> Drying settings.
Temperature boosting activates when the selected
temperature measurement diers from the temperature
set point.
Overtime (Oce usage mode)
In the Oce mode the ventilation unit shuts down unless
a timer program instructs it to operate, or the overtime
setting is active.
Overpressure function should be used only
temporarily for making lighting the replace easier.
The replace combustion air must be provided by
other means than via the ventilation unit.
NOTE
Manual boost
Manual boost is activated from the control panel or
external switch (optional extra). Manual boost raises the
speed of both fans for a pre-set time (default setting is
30 minutes). Manual boost can be interrupted from the
control panel.
Cooking hood and central vacuum
cleaner modes
Switching to cooking hood or central vacuum cleaner
mode is possible only by external control (potential-free
contact). The intent is to maintain the pressure level of the
apartment, despite using the cooking hood and/or the
central vacuum cleaner.
Summer night cooling
On summer nights, the room temperatures can be
lowered with cooler outside air. Heat recovery and heating
are turned o during summer night cooling. Fan speeds
are controlled by the selected control mode. Summer
night cooling starts and stops automatically when it has
been activated from the panel.
Overtime length is congured in the control panel.
It can be activated from the control panel or from a
separate button (optional extra). Overtime control can be
interrupted from the control panel. Overtime can also be
activated via Modbus.
Overpressure (replace function)
Overpressure can be activated from the control panel
or from a separate button (optional extra), which will
make lighting a replace easier. Overpressure time and
the supply air and extract air fan speeds can be set from
the control panel. Overpressure can be interrupted from
the control panel. Over pressure lowers the speed of the
extract air fan and raises the supply air fan speed for 10
minutes.