Controller

Many wall fans are speed controllable. This can be done steplessly by means of phase angle control or in 5 steps with an adjustable transformer. In addition, further functions can be controlled.

Function: Regulation and control units for the fans of the Vario series, surface mounting, suitable for flush-mounted boxes 130 x 55 mm.
Housing: Shapely housing made of non-yellowing ABS plastic. Protection class IP20.
Function: Power reduction, stepless or 5-step, reversing (reversal of the running direction), natural ventilation (open flap), automatic (with the C-sensors - see. room-sensors).
The technical principle of phase angle control, based on the speed controller, can cause a disturbing humming noise in the lower speed range under certain circumstances. In noise-sensitive areas (e.g. bedrooms), use step transformers to control fans.

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