F.C.R. SpA - Via E. Fermi, 3 - 20092 Cinisello Balsamo (MI) - Italyphone +39 02 61798 1 - fax +39 02 61798 300 - www.fcr.it - fcr@fcr.it

Double geometry whirl square diffuser UFO-EH pag. A-35

17.05.18

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

Gr Nqv DP X0,2 LWA

(m3/h) (Pa) (m) (dBA)

300/8 850 10 1,4 26

100 20 2,5 32150 45 3,5 40

400/16 16150 10 1,6 26225 25 2,6 37300 40 3,4 43

500/24 24300 20 2,6 31375 30 3,4 37450 45 4,3 41

600/16 16150 10 1,6 26225 25 2,6 37300 40 3,4 43

600/24 24300 20 2,6 31375 30 3,4 37450 45 4,3 41

600/32 32300 10 2,3 23450 25 3,6 34600 45 4,9 42

600/40 40500 20 2,6 33650 35 3,3 41800 50 3,9 46

NqvDPX0,2LWA

slots numberair-flowpressure dropisothermic horixontal throw (isotachìa 0,2 m/s)sound power level (rif. 10-12 W)

SpecificationsHigh induction vortex square diffuser for ceiling instal-lation. Double geometry exhaust for horizontal vortex launch with Coanda effect , or vertical vortex launch. Construction in galvanised sheet-steel (plate) and plastic material (defllectors). White finish RAL 9010 (plate) and black (deflectors). Fixing by central screw with cover.Plenum with adjustable damper from the environment.

UFO-EH 600/40

F.C.R. SpA - Via E. Fermi, 3 - 20092 Cinisello Balsamo (MI) - Italyphone +39 02 61798 1 - fax +39 02 61798 300 - www.fcr.it - fcr@fcr.it

pag. A-36

17.05.18

Double geometry whirl square diffuser UFO-EH

GrØ A Ø B Ø C ∅ F* H

(mm) (mm) (mm) (mm) (mm)300/8 300 277 277 123 215

400/16 400 377 377 158 250500/24 500 477 477 198 290600/16 594 377 377 158 250600/24 594 477 477 198 290600/32 594 573 573 248 340600/40 594 573 573 248 340

* external diameter

Mounting schemeThe diffuser UFO-EH 600/ has been expressly desi-gned for installation in standard false ceilings frame with panels 600x600 mm.

Horizontal launch with Coanda effect

Vertical launch without Coanda effect

F.C.R. SpA - Via E. Fermi, 3 - 20092 Cinisello Balsamo (MI) - Italyphone +39 02 61798 1 - fax +39 02 61798 300 - www.fcr.it - fcr@fcr.it

Double geometry whirl square diffuser UFO-EH pag. A-37

17.05.18

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.

Performances

100 1000200 400 600 800

qv (m3/h)

20

25

30

35

40

45

50

L wA (d

BA)

50 80 150

402416 1 32N=8

100 1000200 400 600 800

1

2

3

4

5

6

7X 0

.2 (m

)

50 80 150

1.2

1.4

1.6

1.8

2.5

3.5

4.5

5.5

6.5

qv (m3/h)24 2 32

40

16N=8

2 3 4 5 6 7 8X0.2 (m)

0

1

2

3

4

5

d (m

)

hi=3,0 m

hi=3,5 m

hi=4,0 m

hi=4,5 m

3

F.C.R. SpA - Via E. Fermi, 3 - 20092 Cinisello Balsamo (MI) - Italyphone +39 02 61798 1 - fax +39 02 61798 300 - www.fcr.it - fcr@fcr.it

pag. A-38

17.05.18

Double geometry whirl square diffuser UFO-EH

100 1000200 400 600 800

10

20

30

40

50

60

70

80

98

7

6

5

P (P

a)

12

14

1618

25

35

45

50 80 150

qv (m3/h)4016N=8 4 3224

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.

N 8 16 24 32 40Ak (m2) 0,0079 0,0157 0,0246 0,029 0,0381

qv = ṽk x Ak x 3600

Adjustable damper from the environment