The Helios PWDA is a robust operating switch designed to control the speed and direction of single pole-changing fans with Dahlander windings. Housed in a durable gray plastic enclosure for surface mounting, this unit supports fan motors with power ratings up to 7.5 kW.
Ideal for applications requiring flexible fan operation, the PWDA allows both speed variation and airflow direction reversal in a single compact unit. Its straightforward installation and reliable performance make it a valuable accessory for Dahlander-based ventilation systems.