Configuring the Modbus settings is necessary if an external Modbus (e.g. building automation) is used to control the ventilation unit.
By default, the constant flow limiter is deactivated. When the function is activated, it monitors the ventilation unit’s operation automatically and the unit runs as usual with the constant air flow function enabled. If ventilation performance becomes weaker due to, for example, a blocked filter, the constant air flow limiter stops the fan speed from spiking to avoid excessive noise.
When the air flow returns to normal (e.g. after the filters have been cleaned), the limiter automatically returns to standby mode and constant air flow control continues normally. The function is used in locations where the filters are replaced centrally, for example, in apartment blocks.
