26/09/2025

Roller Info: Conversion to 300 mm Fans

We would like to inform you about an important technical change:

The previous fan models “S3G EC 300 S B” (56100003) will be replaced by “ECZA 300 S B” (01610179), and “S3G EC 300 D B” (56100004) will be replaced by “ECZA 300 D B” (01610180).

The following units are affected by this change:
ECZA 300 S B: FHV/T x1x, HVS/T x00 – x03, KBKT x11 – x15
ECZA 300 D B: DLK/T Next x841 – x864

Please note that the installation manual in your possession may be outdated. The wiring diagrams in the fan’s terminal box or connection housing are always binding. The current installation manuals can be found here on our website.

The new fans can be controlled via a 0–10 V speed control signal and are supplied as standard with a resistor DIP switch board. Please refer to the wiring diagram for the correct DIP switch combination for your application.

Thank you for your trust in our products and our work.
Please stay with us in the future. We look forward to continuing to support you with innovative solutions and proven quality.

Kind regards,
Your Walter Roller team

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