Circular diffuser with microperforated disc UFO-N Description Microperforated disc diffuser for ceiling installation. The launch is horizontal radial with Coanda effect, through the circular slot that is created between the body of the diffuser and the microperforated disc : the distance between these two is variable on four positions. Inside a intermediate height adjustable disc (screw adjustment) acts as a damper. Characterized by a simple and elegant design, it is tipically used in civil environments for office conditioning, shops, hospital structures snd exibi-tion spaces. Construction painted Natural aluminum (body), painted galvanized steel (microperforated disc). Finish White RAL 9010 gloss, powder-coated polyester type. Xn2 isothermal horizontal throw (isotachia 0.2 m / s) Lwa sound power level (rif. 10-12 W). Accessories PLSC : Standard plenum with lateral inlet. PLIC : insulated* plenum with lateral inlet. * polyurethane internal isolation thickness. 6 mm, cl.1 Specifications Adjustable microperforated disc circular diffuser for ceiling installation. Radial horizontal launch. Steel and aluminum painted white RAL 9010. 0 A 0 B* 0 C D 0 E 0 F* H Dn (mm) (mm) (mm) (mm) (mm) (mm) (mm) 160 220 158 270 55 240 158 296~ * external diameter 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]

Circular diffuser with microperforated disc installation height distance between the center of the diffuser and the wall to which the jet flows temperature difference (air input - environment setpoint) pressure drop X0,2 horizontal isothermal free throw (isotachìa 0,2 m/s) LWA A-weighted sound power level “A” (rif. 10-12 W) The value of d was calculated in relation to X0,2 and hi to maintain residual velocity in the occupied area within the limit of 0,2 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%. 3 Dipending on installation...

Circular diffuser with microperforated disc Airflow calculation Because of the possible asymmetry introduced by the plenum and the flexible duct, you should position the probe for measuring the speed of vk in at least 4 points equally spaced angularly. You must employ hot-wire anemometers, taking care to orient the “window” radially. You must place the probe as shown: in the middle of the slot near the same (in the first few inches from the exhaust velocity is constant - zone 1). At each point you have to measure the average speed in a range of at least 1 minute (average time). To obtain the...