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DES
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Catalog excerpts

DES - 1

Whirl circular diffuser DES / DES-Q Whirl circular diffuser for ceiling installation. The whirling exhaust with Coanda effect, thanks to a rounded edge, allows a quick mixing and so a quick reduction of the thermic jump and velocity, which result reduced already at a short distance. Fixing by central screw (screw with cover). It is mainly used in civil air conditioning systems for offices, shops, hospital stays, exhibition areas. The DES-Q version is equipped with plate 595x595 mm. Construction Painted steel sheet. Finish Gloss white RAL 9010, powder painted. Accessories PLSS : standard plenum with adjustable damper from the room complete with central screw for fixing the diffuser and relative screw cover PLIS : as PLSS but with internal insulation. * polyurethane thickness 6 mm, cl.1 Specifications Whirl circular diffuser for ceiling installation. Rounded edge for horizontal throw with Coanda effect. Construction in white RAL 9010 painted steel. Fixing by central screw with cover. air flow pressure drop isothermic horizontal throw (isotachy 0,2 m/s) sound power level (ref. 10-12 W) 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 - fcr@fcr.it

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DES - 2

Whirl circular diffuser height installation distance between the core of diffuser and the wall to which the flow is directed air flow per single diffuser X0,2 free isothermic horizontal throw (isotachy 0,2 m/s) thermic jump (supplied air - environment setpoint) pressure drop LWA sound power level weighed “A” (ref. 10-12 W) Notes The value of 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 the case of diffusion with Dt = -10 °C (cooling) reduce X0,2 by 15%, with Dt = 10 °C (heating) increase X0,2 by 20%. 2...

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DES - 3

Whirl circular diffuser DES / DES-Q Air flow calculation Due to possible asymmetries caused by plenum and flexible duct, it is necessary to position the velocity probe to measure vk at least in 4 equally spaced points at the angles. You must position the probe as showed in the picture. In each point you must measure the average velocity in an interval of at least 1 minute (average in time). In order to get the air flow you calculate therefore the arithmetic mean vk of the values measured in this way. Dn 125 160 200 250 315 Mounting scheme The diffuser DES-Q is specifically studied for being...

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