Air extractors with single or double sandwich panelling in polyurethane foam of thickness 25 mm, designed for installation in false ceilings or in duty rooms. Air deliveries from 1.000 to 15.000 m3/h.
The extractors serie ESA D are manufactured in 4 sizes to permit air extraction using fans having a good air volume/pressure ratio and moderate electrical capacities used. They are usually installed outside or for solutions at view. The maximum duty temperature is 40° C.
These extractors are manufactured with bearing framework and prepainted single skin steel sheet. The frame is made of extruded anticorodal aluminium alloy profiles, usually of type AlMgSi 0,5- UNI 9006/1 of dimensions 20 x 18 mm for all sizes, using 3-way corners made of nylon weighted with fiber glass.
The standard paneling is single skin type, made of galvanized and prepainted steel sheet, fastened to the frame with galvanized steel screws. The inside is made of self-extinguishing open cell polyurethane foam with polyester base, thickness 20 mm, coupled on air side, to a closed cell embossed polyester film which is antiscaling type and water, oils, dust proof: – density of insulating material: 30 Kg/m3. The steel sheet used for outside closing in standard version is the following: – prepainted steel sheet with base support made of hot dipped galvanized steel EURONORM 142-79 and coating, colour white grey for a special resistance to weathering. The protective system consists of a dry film of 25 μm on the exposed skin and of a dry film of 5 μm on the non-exposed skin. A self-adhesive PVC film is laid on the steel sheet exposed surface in order to avoid damages during the manufacturing procedures and transport. The thickness of the steel sheet.
The casing of the extraction units is completely closed, therefore any panel can be holed for the installation of a return grid, a damper or the connection to a duct. The inspection of the motor-fan set is assured by removable panels.
The extraction units that have to be installed outside or anyway exposed to weathering are supplied with covering roof, as accessory element. The roof is made of flat hot dipped galvanized sheet. On these units the roof is supplied already mounted and fastened to the casing.
Fan and motor
All extractors of ESA D series consist of a fanmotor set composed by a double inlet centrifugal fan with forward curved blades, directly coupled to the electric motor of closed type. The construction foresees galvanized steel sheet containing frame and long life (minimum 20.000 hours in normal working conditions) ball bearings. The motor used is: – 6 poles, three speeds – monophasic type 230 v / 50 Hz Eurotension whose performances and capacities depend on the construction features. The connecting terminal block is placed on the fan set. The removal of the fan-motor set can be made from any panel of the unit.