Use and Care Manual

www.ventilation-system.com
8
TwinFresh Expert
TWINFRESH EXPERT DUO RA1-30 OPERATION MODES
The ventilator has three operation modes:
Ventilation. One fan operates in the air extract mode and the other fan operates in the air supply mode at set speed. The fans do not
change their rotation direction.
Air extract. Both fans operate in air extract mode at set speed.
In case of a sensor activation the ventilation unit follows one of two functioning algorithms to be set during setup of the ventilation unit
via the DIP switch. For details, see page 14.
Regeneration. One of the fans of the ventilator operates in extract mode and the other one in supply mode.
The fans change their rotation direction every 70 seconds.
Exhaust air
Extract air
Intake air
Supply air
Intake air
70 s
70 s
Supply air
Exhaust air
Extract air
The shutters are closed The shutters are opened
The indoor unit is equipped with automatic shutters.
During the ventilator operation the automatic shutters are
opened and let the air flow freely through the ventilator.
The automatic shutters are closed within 2 minutes at the
ventilator shut down.
FUNCTIONING OF TWINFRESH EXPERT RA1-50 SHUTTERS
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