Liberator Lib-1

A powered axial smoke extraction fan designed to extract smoke and hot gases in the event of a fire. In addition, the Liberator Lib-1 can also be used for day-to-day mechanical extract ventilation.

Overview

Lib-1 axial smoke extraction fans are designed for S1 continuous operation (-20ºC and +55ºC) and S2 emergency operation. When in S2 emergency operation in areas with a fire hazard, the extraction fans have been tested and approved for 300ºC/60 min or 400ºC/120 min to EN 12101-3.

The axial extraction fan fulfils the requirements of Regulation (EU) NR.327/2011 with regards to the specification of requirements for the environmentally-friendly design of fans, and is therefore compliant with the ErP Directive (EU Directive 2009/125/EC requirements for the Eco-design of energy-related products).

The fire-rated asynchronous motor has an IE3 efficiency class (Premium efficiency), an H isolation class and an IP 55 protection class according to EN 60034-5/IEC.

Lib-1 Liberators are used as ventilation systems in industrial, commercial and municipal buildings as supply/exhaust air units. They are tested and suitable for installation either inside or outside a smoke compartment (fire zone), and suited to either horizontal or vertical installation.

They can be installed either within a ducted system or in a free air-intake system. The optional ATEX version can also be used in potentially explosive areas classified as EX IIB T3 Gc.

Features and benefits

  • Airflows up to 192300 m³/h
  • Sizes: Ø410mm to Ø1600 mm
  • Dual function (smoke ventilation and day-to-day ventilation)
  • Can be controlled by a Colt frequency inverter
  • Tested in accordance with EN 12101-3
  • Various accessories widen its scope

Available versions

Liberator Lib-1

The Liberator Lib-1 axial smoke extraction fan consists of a cylindrical steel housing (coated to RAL 7047 - telegrey 4) with rolled flanges. The impeller blades are made of die-cast aluminium.

With this version (short housing), the motor projects outwards on the outlet side, depending on the size. On the outside of the housing, the Lib-1 has a terminal box for connecting the local power supply. On the motor side the fan is completely pre-wired (between motor junction box and junction box).

Liberator Lib-1-CL

Similar to the Liberator Lib-1, the Liberator Lib-1-CL consists of a cylindrical steel housing (coated in RAL 7047 - telegrey 4) with rolled flanges. The impeller blades are made of die-cast aluminium.

The Liberator Lib-1-CL series housing has been adapted to the motor/impeller unit (long housing) so that the motor unit does not protrude beyond the housing. The fan housing is in addition equipped with an inspection cover (with screw fixings) on the outside of the housing, which is easy to remove.

On the outside of the housing, the Lib-1-CL has a terminal box for connecting the on-site power supply. On the motor side the fan is completely pre-wired (between motor junction box and junction box).

Tested and approved in combination with the Colt frequency inverter

The Colt frequency inverter is an electronic device (for variable speed drives) which controls the speed of electric motors and the associated airflow individually and according to the application.

The frequency inverter converts a uniform AC voltage provided by the mains into an AC voltage with variable frequency and amplitude. These values are used as control variables for the energy output to the connected fan motors, thereby providing a continuously variable control. The level of this energy output is measured by a control system integrated into the frequency inverter.

Because the frequency inverter can infinitely adjust the fan output, it is possible to meet the various requirements for fire protection and ventilation, and achieve various building-specific solutions.

When used in combination with the efficient Colt Liberator fans, the frequency inverter is certified according to EN12101-3 for use in smoke ventilation according to classes F300 and F400.

In emergency mode, all thermal protection functions of the inverter are disabled. In the event of a fire, this ensures continuous operation of the fan until the frequency inverter or motor is no longer able to maintain operation. This means that no additional and costly bypass function is required for overriding the frequency inverter in the controller.

The input signal for the emergency mode can be activated by fire activation (a voltage-free contact from manual release points and/or automatic releases), so that in the event of a fire the unit functions as long as possible in order to remove smoke or maintain the air quality in the building.

Advantages

  • Determination of the motor power actually required, which depends on the requirements of the particular application (process ventilation, smoke extraction in case of fire)
  • The smoke extraction requirements can be met with individualised and coordinated solutions
  • Elimination of a complex and expensive bypass control for smoke ventilation
  • Energy efficiency by saving unneeded energy
  • Improvement of the internal working conditions via day-to-day ventilation
  • Reduction of the mechanical load of fans and their noise emissions

Performance classes

In accordance with EN 12101-3

  • Resistance to fire
    • F300 – 300°C / 60 min
    • F400 – 400°C / 120 min

Colt Liberator with a frequency inverter

Frequency inverter
Frequency inverter

When used in combination with the efficient Colt Liberator fans, the frequency inverter is certified according to EN 12101-3:2015 for use in smoke ventilation applications for the F300 and F400 classes.

In emergency mode, all thermal protection functions of the inverter are disabled. In the event of a fire, this ensures continuous operation of the fan until the frequency inverter or motor is no longer able to maintain operation. This means that no additional and costly bypass function is required for overriding the frequency inverter in the controller.

The input signal for the emergency mode can be activated by fire activation (voltage-free contact from manual release points and/or automatic releases), so that in the event of a fire the unit functions as long as possible in order to remove smoke or maintain the air quality in the building.

> More information about the frequency converter