10
Push button supply air
mode
The supply air mode and the supply air fan are switched on by pushing and locking.
By pushing again the supply air mode is deactivated again.
Normal-mode
Both fans are switched on by pushing and locking.
Button boost ventilation
mode / reset filter runtime
Function-button for boost ventilation mode:
Pushing this button activates the boost ventilation with an air volume flow for the
duration of 15 min which corresponds to position 9 of the rotary knob. After the boost
ventilation time of 15 min is over, the air-flow returns to the previously suppled air
quantity in the respectively active operating mode. The boost ventilation mode can be
terminated any time by pushing this button > 3 seconds.
Function button for reset filter runtime:
An operating hour counter with a set runtime of 180 d is integrated in the control for
cyclical filter control. The button boost ventilation mode / reset filter runtime is used to
reset the filter runtime. Pushing this button > 3 s restarts the filter runtime.
If a reset of the filter runtime is carried out before expiration of the 180 d by pushing
the button > 3 s, the reset is acknowledged by 4x quick flashing of the LED-fan-
symbol.
No reset command is possible during an active boost ventilation mode!
Tab. 2: Operating functions external control panel
2.2.1.2
Signalling of operating and maintenance modes
Symbol
LED-Signalling
Function / meaning / measure
Both LEDs lights
Operating mode normal mode (exhaust and supply air)
LED extract air
symbol lights
Operating mode extract air mode active (extract air only)
LED supply air
symbol lights
Operating mode supply air mode active (supply air only)
LED fan symbol
lights
Boost-ventilation mode active;
Boost-ventilation mode is possible in any
operating mode!
LED fan symbol is
flashing
Un-occupied mode is active;
Un-occupied mode is possible in any operating
mode!
LED fan-symbol is
flashing quickly
Filter runtime expired; carry out filter control or filter change
Boost ventilation mode cannot be activated as
long as there is not reset command!
Tab. 3: Function assignment of LED-signalling
External control signal 0-10V
The ventilation device can be operated with an external control signal 0-10 V. A 0-10 V applied analogue signal is
interpreted as control signal for the fan rotational speed. The externally suppled control voltage is only valid above
the range of the present scale position of the rotary knob.
In order to use the whole external 0-10 V – control range, the rotary knob must be in position 1!
Boost ventilation mode with external boost ventilation sensing device
In most cases, boost ventilation sensing devices are mounted in exhaust air rooms such as bathrooms, W.C.s or
kitchens in order to activate temporary maximum ventilation in these rooms for fast discharge of increased moisture
and odours.
When operating this control element, the functional properties and visualisations described for the boost ventilation
mode are generated. The boost ventilation mode is started again at each activation and interrupts the current
operating mode for the duration set. Following this, the device switches back to the previously active operating mode.
