VENTS VA 04

• The unit VA is a fan-filter block enclosed in a compact sound-insulated casing.

• The VA unit provides high pressure combined with low energy demand due to the impeller with backward curved blades.

• The unit is suitable for supply and exhaust ventilation applications.

• Steel casing covered with aluzinc coating internally filled with 50 mm heat- and sound-insulating layer made of mineral wool.

• The units are equipped with a high-pressure radial fan directly driven from the external rotor motor with backward curved blades.

• The fan motor has integrated thermal contacts for connection to an external protecting device.

• The unit is suitable for use both with and without filter as a simple fan. The replaceable filter block is an optional item and is not included into the unit delivery set.

•  All the units may be equipped with a replaceable G4 panel filter, refer Accessories.

• The unit is mounted to the air duct in any position.

• The unit is suitable for installation in utility and main premises behind the false ceiling, in the recess or directly in the room.

• The fan electric contacts are leaded to the terminal block located in the terminal box.

SF

ACCESSORIES

• The fan speed is controlled by the external triac, autotransformer or frequency three phase speed controller, refer RSA, VFED).

• To disable uncontrollable air flow when the fan is off and in case of power failure it is recommended to install the air damper with a return spring from outside behind the unit.

• For attenuation of sound generated by the fan it is recommended to install the duct silencer (refer SR) from inside before the unit.

• For vibration absorbing it is recommended to install the flexible anti-vibration connectors (refer VVG) on both sides of the unit.

• For control of the filter clogging degree it is recommended to install the differential pressure switch (refer DTV 500).