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Idiomas disponibles
Idiomas disponibles
FUNCTIONS DETAILS
To be used exclusively by the installer or
qualified personnel.
A U t o
• "
" AUTOMATIC VENTILATION
MODE WITH HUMIDITY SENSOR
The fan speed is set according to the interval relating to
the ambient relative humidity detected by the sensor.
If the ambient humidity is compatible with the ambi-
ent comfort (typically between 25% and 50%), then
a special control for air exchange is not necessary
and the user can control the speed of the fans as in
Manual Mode.
If the ambient humidity temporarily goes beyond the
ambient comfort range, then an automatic variable
flow control mode is engaged, for tracking a target
ambient humidity value.
The target value is continuously calculated by the
system as a daily average of the ambient humidity.
This way the system reacts automatically to restore as
much as possible the comfort conditions lost due to an
extraordinary event, such as steam production caused
by a hot shower or a pot while cooking.
In variable-flow automatic control mode, the user can
manually change the fan speed at any time, as required.
The automatic mode will be restored at the next sig-
nificant ambient humidity variation.
If, however, the poor comfort conditions persist, then
it means that the dry or high humidity is not due to
extraordinary and temporary events, but depends
on harsh weather conditions, such as winter frost or
extreme heat.
In these extreme conditions, the automatic mode sets
the fan at minimum speed, in order to isolate as much
as possible the internal environment from the external
one and at the same time preserve the indoor comfort.
The speed at which the unit operates in the case of
an excessively dry environment can be changed by
the installer by accessing the "
the PAr menu.
The emergency mode for an excessively damp climate
is effective in the presence of an air-conditioning sys-
tem with dehumidification. In this case it is possible to
enable this function from the HrHis parameter.
ErHS
" parameter in
• ANTIFREEZE FUNCTION
Without preheating
•
If the antifreeze ducted electric resistance availa-
ble as an accessory is not used, the unit features
preventive operation logic which, below -5°C, au-
tomatically makes the intake fan run at minimum
for 10 minutes every hour.
Also, if the temperature falls below -10° C, the unit
stops automatically
and an alert ("FRST") appears
on the control display.
PLEASE NOTE: When the Frost alarm is triggered, the
unit switches OFF and restarts automatically when
the critical climatic condition disappears.
With modulating electric preheating
•
In the event that the unit is installed in a cold cli-
mate, we recommend
the use of ducted external electric antifreeze resist-
ances, available as an accessory and fitted on the
fresh air intake circuit.
The electric resistances available for units pre-
heat the supply air entering the heat exchanger
in order to prevent the freezing of the humid air
extracted and discharged by the heat exchanger
in the opposite circuit.
In fact, when the fresh air drops below the critical
temperature, posing the risk of freezing of the
discharged air, the resistance is activated and
modulates the heat output to keep the temper-
ature of the discharged air within the desired
fluctuation range.
The electric resistance available as an accessory is se-
lected in order to maintain the minimum conditions
of indoor comfort at outdoor temperatures down
to -10°C, and in order to avoid the degenerative
formation of ice at discharge down to -15°C outside.
The electric resistance is fitted with a safety ther-
mostat that turns off the unit in case of uncon-
trolled heating. In case the resistance does not
start up, instead, the unit will turn off if the supply
air temperature falls below 5°C.
English
"FrSt"
101
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