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English
• AUTOMATIC 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 automatic variable flow control mode, the user can man-
ually change the speed of the fans as required at any time.
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 “
ErHS
” parameter in the
PAr menu.
The emergency mode for an excessively damp
climate is effective in the presence of an air-
conditioning system with dehumidification. In this
case it is possible to enable this function from the
“
HrHis
” parameter.
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Hrlo
Hrlo
Hrst
Hrhi
ErhS
ATTENUATION
SPEED FOR
EXTREMELY
DRY
CLIMATE
ErhS
ATTENUATION
SPEED FOR
EXTREMELY
HUMID CLIMATE
ONLY IF “HRHIF”enabled
VARIABLE SPEED FOR
HYPERVENTILATION
MANUAL
MODE
REDUCED VARIABLE
SPEED
Average relative humidity over 24h
Instan
taneous R
ela
tiv
e Humidit
y
