VKM 250 AC

Inline centrifugal fans in steel casing with air flow up to 1520 m³/h.
  • AC Motor
  • Speed-controllable
  • Backward-curved blades

Description

APPLICATIONS
  • Supply and exhaust ventilation systems for commercial, office and other public or industrial premises.
  • The steel casing provides reliable operation in case of outdoor installation.
  • For premises with high requirements to the noise level we suggest units in low-noise modification (VKM…Q).
DESIGN
  • The fan casing is made of steel with polymeric coating.
  • For easy connection and operation the power cord with a plug can be provided (VKM…R).
MOTOR
  • The impeller with backward curved blades is powered by the single phase motor with external rotor and overheating protection with automatic restart.
  • Some standard sizes are available is high-powered modifications (VKMS).
  •  The VKM…E models are equipped with energy-efficient motor with low energy demand.
  • The motor is equipped with ball bearings for long service life designed for at least 40 000 hours.
  • For precise features, safe operation and low noise, each turbine is dynamically balanced while assembly.
  • Motor protection rating IP 44.
SPEED CONTROL
  • Smooth or step speed control with a thyristor or autotransformer speed controller.
  • Several fans may be connected to one speed controller provided that the total power and operating current do not exceed the rated speed controller parameters.
  • The VKM…P models are equipped with a built-in speed controller (available for diameters 100…315).
MOUNTING
  • Mounting to wall or ceiling at any angle is performed with fastening brackets supplied with the unit.
  • The fan is powered through the external terminal box.
  • Electric connection and installation shall be performed in compliance with the manual and wiring diagram on the terminal box.
THE FAN WITH ELECTRONIC TEMPERATURE AND CONTROL MODULE (U OPTION)
  • The ideal solution for ventilation of the premises requiring permanent temperature control, i.e. greenhouses.
  • The fan with the electronic temperature and speed control module provides automatic control of the motor speed (air capacity) depending on air temperature in the air duct or in the room.
  • The front panel of the electronic module has the following control knobs:
    • speed control knob for setting the motor speed;
    • thermostat control knob for setting the temperature set point;
    • thermostat indicator light.
  • VKM…Un – the model with an external temperature sensor fixed on a 4 m cable (Un / U1n option).
  • The temperature sensor has mechanical protection.

Characteristics

ParameterVKM 250
50 Hz
VKM 250
60 Hz
Measurement unit
Phase1˜
Voltage230V
Frequency5060Hz
Sound pressure level at 3 m distance5051dBА
Power consumption194240W
Maximum air capacity14201520m³/h
Current0.851.05A
RPM27902860min-1
Max. transported air temperature-25 +45°С
Protection ratingIP X4
Duct diameter250mm
Weight8.4kg
Designcentrifugal
Casing materialpolymer coated steel
Ductfor round air ducts
Typesupply and exhaust
MountingInline

Additional characteristics

Sound-power levelLpA, 3 m dBALpA, 1 m dBA
Gen.Octave-frequency band [Hz]
Hz631252505001000200040008000
LwA to inletdBA9061788583858177657080
LwA to outletdBA8864777382848277636878
LwA to environmentdBA7138526266656458445060

Dimensions

ParameterValueMeasurement unit
∅D248mm
B1355mm
ØD1345mm
B395mm
L250mm
L125mm
L230mm
L340mm

14 schema Inline centrifugal fans in steel casing with air flow up to 1520 m³/h. AC Motor Speed-controllable Backward-curved blades

Seeking residential ERV Ventilation system?

To create optimal quality systems, we personalize our ERV ventilation solutions. 

Fill in the form to get personal guidance 

We create Europeean ERV Solutions

Fill in the form to get personal guidance

Looking for ERV Residential Ventilation?

Creating the optimal solution for you requires knowledge of your specific situation. 

Book a free guidance call below