Axial roof fan VENTS VOK1 250 | official VENTS website

Description

APPLICATIONS
Exhaust ventilation systems for commercial, office and other public or industrial premises for various premises suitable for roof mounting.	Compatible with Ø 200 to 315 mm round air ducts.
DESIGN
The fan casing is made of steel with polymeric coating, impeller is made of aluminium.
MOTOR
Single-phase asynchronous motor with external rotor and built-in thermal protection with automatic restart.	Ball bearings ensure long service life. Motor protection rating IP 44.
SPEED CONTROL
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.
MOUNTING
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 VOK1 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 wiring diagram on the terminal box.

Characteristics

Parameter	VOK1 250 50 Hz	VOK1 250 60 Hz	Measurement unit
Phase	1	1	˜
Voltage	230	230	V
Frequency	50	60	Hz
Power consumption	68	76	W
Current	0.48	0.51	A
Max. air capacity	1070	1050	m³/h
RPM	1300	1450	min^-1
Noise level at 3 m	48	48	dBА
Maximum transported air temperature	40	40	°С
IP Code	IP 24	IP 24	-
Weight	7.2	7.2	kg