For direct control of smoke ventilation units and comfort ventilation windows and vents. The Ventec WS 400 wind sensor sends impulses to the control unit to indicate the wind speed. Inside the control unit, on a printer board, there is a 7-position sensor that can be used to set the required wind alarm threshold. Higher values correspond to a higher wind speed threshold. Positions 0 to 7 correspond to the wind speed on the Beaufort scale. The selector comes pre-set at position ‘3’.

As long as the signal from the wind sensor exceeds the threshold set, the CLOSE command takes precedence over the manual commands and the thermostat. Once 5 minutes have passed since the sensor’s signal returned to within the limits set by the threshold, the manual commands and thermostat are enabled again.