9
If the temperature is very low and the heater is activated during the nighttime (even with lowered temperature set-
point), then during the upcoming daytime indoor temperature will be increased using the heat exchanger so that accu-
mulated heat could be used during the next cold nighttime, the lowered setpoint for the heater remains.
ECO
mode will have impact for the following user
functions/modes if selected:
ECO
mode is always activated by the following modes:
•
AUTO
mode
•
MANUAL
mode
•
AWAY
mode
•
HOLIDAY
mode
•
CENTRAL VACUUM CLEANER
function
•
COOKER HOOD
function
•
FIREPLACE
mode
•
AWAY
mode
•
HOLIDAY
mode
ECO mode
is always deactivated by the following user
functions/modes:
•
CROWDED
mode
•
REFRESH
mode
•
FREE COOLING
function
4.5.3
Airflow settings
Airflow settings are available only in
MANUAL
mode. Click on fan icon on the main screen to enter
SET
AIRFLOW
menu.
Use up and down arrows or a slider to change the airflow value.
The airflow may be adjusted in these steps:
Off
/
Low
/
Normal
/
High
. These settings control output signals to the sup-
ply and extract fans.
Important
It is
not
recommended to set fan to
Off
in standard households. If manual fan stop is activated, the unit
should be provided with dampers in exhaust and fresh air ducts to avoid cold draught and risk of
condensation when the unit has been stopped.
The fan can be set to
Off
by activating
Manual Fan Stop
function in
Service
menu.
4.5.4
Indoor Air Quality
The unit automatically controls indoor humidity and/or CO
2
levels by adjusting airflow setting. Airflow is
increased if air quality is decreasing.
Demand Control
function is responsible for IAQ (Indoor Air Quality) regulation. Relative humidity (RH) and/or CO
2
sen-
sors are responsible for IAQ monitoring.
Indoor air quality (IAQ) indicator is available if
AUTO
mode and
Demand Control
function is activated.
IAQ levels:
•
ECONOMIC
: Actual IAQ value is below low IAQ set point.
•
GOOD
: Actual IAQ value is between low and high IAQ limits.
•
IMPROVING
: Actual IAQ value is above high IAQ set point.
Different airflow settings can be set for
IMPROVING
and
GOOD
IAQ levels in
Service
menu.
Setpoint for relative humidity and CO
2
level can be set in
Service
menu.
4.5.5
Status line
Status line located at the bottom area of home screen displays information about:
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