VENTS VOK 4E 350

Exhaust ventilation systems for commercial, office and other public or industrial premises for various premises for roof mounting.

The fan casing is made of steel with polymeric coating.

The impellers are powered with two- or four-pole, singlephase asynchronous motors with external rotor and built-in thermal overheating protection with automatic restart depending on the model.

Ball bearings in the motor ensure long service life.

Motor protection rating IP 24.

Both smooth or step speed control is performed by means of the thyristor or autotransformer controller.

Several fans can be connected to one controller under condition that the total power and operating current do not exceed the rated controller values.

The fan is mounted on the roof directly above the ventilating duct or shaft and is firmly fixed to the flat surface by means of a connecting plate.

While mounting VOK fans directly onto the flat roof a supporting block shall be provided to prevent water and snow drops into the vent of the ventilation shaft.

Electrical connection and installation shall be performed in compliance with the manual and circuit diagram on the terminal box.