Fixed cones circular diffuser Description Fixed cones diffuser for ceiling installation. The launch is horizontal radial with Coanda effect. It can be used both in the case of non-ducted installations (ceiling under pressure), both in the case of ducted systems, if equipped with its collar (TD-9 or TD-10). Represents the simplest ceiling diffusion solution, commonly used in extraction. Construction Painted steel. Finish White RAL 9010 gloss, powder-coated polyester type. Accessories DT 9: butterfly damper * (screwad justment). DT 10: flexible duct collar fitting. * Includes collar fitting to flexible duct. Fixed cones circluar diffuser for ceiling installation. Horizontal radial launch. Construction in painted steel RAL 9010. air flow pressure drop isothermal horizontal throw (isotachìa 0.2 m / s) sound power level (rif. 10-12 W) F.C.R. SpA - Via E. Fermi, 3 - 20092 Cinisello Balsamo (MI) - Italy phone +39 02 61798 1 - fax +39 02 617

Fixed cones circular diffuser DKE Key to symbols h. installation height d distance between the center of the diffuser and the wall to which the jet flows qv airflow per diffuser X02 horizontal isothermal free throw (isotachia 0,2 m/s) At temperature difference (air input - environment setpoint) AP pressure drop Lwa A-weighted sound power level “A” (rif. 10-12 W) Notes The value of d was calculated in relation to X02 and h. to maintain residual velocity in the occupied area within the limit of 0,2 m/s In case of diffusion with At = -10 °C (cooling) reduce X02 of 15%, with At = 10 °C (heating)...

Fixed cones circular diffuser Airflow calculation Because of the possible asymmetry introduced by 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 in Fig. At each point you have to measure the average speed in a range of at least 1 minute (average time). To obtain the air flow, then calculated the arithmetic average of the values k measured and multiply ṽ by the value of Ak given in the table. F.C.R. SpA - Via...