F.C.R. SpA - Via E. Fermi, 3 - 20092 Cinisello Balsamo (MI) - Italy phone +39 02 61798 1 - fax +39 02 61798 300 - www.fcr.it - [email protected]Double geometry whirl square diffuser UFO-EH pag. A-35 18.10.17 Description Whirl square diffuser for ceiling installation. According to the internal deflectors’ position, you can obtain two dif- ferents launch’s configurations: a whirling one not radial with Coanda effect, suitable for summer regimen and a whirling one without Coanda effect, suitable for winter re- gimens. The passage from one configuration to the other one is made by rotating each flap round its own axis (possible also from the environment). It is characterised by a rapid mixing, it stands out for the elegant and mo- dern design and is commonly employed in conditioning/ ventilating systems, most of all in in civil environments. The fixing is made through central screw with cover. Construction Painted galvanised sheet-steel (plate), plastic material (deflectors). Finish Plate: painted gloss white RAL 9010. Deflectors: matt black (white on request). Accessories PLS-EHC : standard plenum with adjustable damper*. PLI-EHC : insulated plenum** with adjustable damper*. * from environment ** internal insulation in polyurethane thickness 6 mm, cl.1 Gr N q v DP X 0,2 L WA (m 3 /h) (Pa) (m) (dB A ) 300/8 8 50 10 1,4 26 100 20 2,5 32 150 45 3,5 40 400/16 16 150 10 1,6 26 250 40 2,9 40 350 60 4,2 48 500/24 24 300 20 2,6 31 400 35 3,6 38 500 60 4,6 44 600/16 16 150 10 1,6 26 250 40 2,9 40 350 60 4,2 48 600/24 24 300 20 2,6 31 400 35 3,6 38 500 60 4,6 44 600/32 32 300 10 2,3 23 500 30 4,0 37 700 60 5,9 46 600/40 40 500 20 2,6 33 700 40 3,5 43 900 70 4,3 50 N q v DP X 0,2 L WA slots number air-flow pressure drop isothermic horixontal throw (isotachìa 0,2 m/s) sound power level (rif. 10 -12 W) Specifications Whirl square diffuser for ceiling installation. Double ge- ometry exhaust for whirling horizontal launch with Co- anda effect , or whirling vertical launch. Construction in galvanised sheet-steel (plate) and plastic material (de- fllectors). White finish RAL 9010 (plate) and black (de- flectors). Fixing by central screw with cover. UFO-EH 600/40
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DescriptionWhirl square diffuser for ceiling installation. According to the internal deflectors’ position, you can obtain two dif-ferents launch’s configurations: a whirling one not radial with Coanda effect, suitable for summer regimen and a whirling one without Coanda effect, suitable for winter re-gimens. The passage from one configuration to the other one is made by rotating each flap round its own axis (possible also from the environment). It is characterised by a rapid mixing, it stands out for the elegant and mo-dern design and is commonly employed in conditioning/ventilating systems, most of all in in civil environments. The fixing is made through central screw with cover.ConstructionPainted galvanised sheet-steel (plate), plastic material (deflectors).FinishPlate: painted gloss white RAL 9010.Deflectors: matt black (white on request).AccessoriesPLS-EHC : standard plenum with adjustable damper*.PLI-EHC : insulated plenum** with adjustable damper*.* from environment** internal insulation in polyurethane thickness 6 mm, cl.1
SpecificationsWhirl square diffuser for ceiling installation. Double ge-ometry exhaust for whirling horizontal launch with Co-anda effect , or whirling vertical launch. Construction in galvanised sheet-steel (plate) and plastic material (de-fllectors). White finish RAL 9010 (plate) and black (de-flectors). Fixing by central screw with cover.
Key to symbolshi Installation heightd Distance between the centre of the diffuser and
the wall to which the jet flowsqv Air-flow per diffuserX0,2 Free isothermic horizontal throw
(isotachìa 0,2 m/s)Dt Temperature difference (supplied air - environment
setpoint)DP Pressure dropLWA Sound power level weighted “A”
(rif. 10-12 W)NotesThe value d has been calculated according to X0,2 and hi to keep the remaining velocity in the occupied volume within the limit of 0,20 m/s.
In case of diffusion with Dt = -10 °C (cooling) reduce X0,2 of 15%, with Dt = 10 °C (heating) increase X0,2 of 20%.
Selection1 At the requested air-flow qv, with the allowed sound
power level LWA, from diagram 1 determine the size of Gr (N).
2 At the requested air-flow qv, from diagram 2 determi-ne the free throw X0,2.
3 According to installation height hi, from diagram 3 de-termine the minimum distance d between the centre of the diffuser and the wall to which the jet flows.
4 At the requested air-flow qv, from diagram 4 veri-fy that the pressure drop DP is compatible with the plan’s value.
Air-flow calculationDue to possible asymmetries caused by plenum and fle-xible duct, it is necessary to position the velocity probe to measure vk in at least 4 angularly equally spaced points. You must position the probe as shown in the picture and in each point you must measure the average speed in a breaktime of at least 1 minute (average in time). In order to obtain the air-flow, calculate the arithmetic average ṽk of the so measured values.