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1 for Asia / Pacific Radial outlet RA-N... DS AUS./
2 Radial outlet RA-N Preliary remarks KRANTZ KOMPONENTEN radial outlets of type RA-N have fixed radial vanes. They generate high-quality, diffuse supply according to the principle of turbulent mixing air flow. The supply air is discharged horizontally. The highly turbulent supply air jets induce the indoor air, which leads to rapid equalisation of supply air and indoor air temperature and rapid jet velocity decay. The RA-N produces extremely comfortable indoor air conditions and is eently suitable for offices and adistrative buildings. They are intended for installation in suspended ceiling systems. The RA-N radial outlet is available in sizes for volume flow rates of to l/s (at = K). The discharge height is. to. m, the imum temperature difference between supply air and indoor air is K when cooling, and + K at m and + K at. m height when heating. H ø9 Detail X Type Q 9 turn-up for installation in coffered ceilings ød H B L X Nom. ø DN B 7 L E Y H Nom. ø DN ød Radial outlet with square visible face ) and connection box ) Key: RA-N radial outlet Collar ) Connection box Spigot with volume flow damper adjustable from room Fastener for RA-N Hanging bracket 7 Insulation Detail Y Type R Flush contact edge for ceiling attachment Noal diameter DN DN Ceiling grid DN Collar size V l/s at = K Volume flow rate ) Dimensions in mm Weight in kg V V ) Con- in l/s E With Perf. ) ød L L B B H H H ød Air nec- tion l/s at = K mm mm mm mm mm mm mm mm mm mm outlet = K box ) Rectangular and circular design available on request ) pt less than Pa, Lp per diffuser less than NC (based on db(a) ) Collar for -way, -way and -way discharge available on request room absorption), V valid for diffuser flush with closed ceiling ) Reducer for outlet connection to duct, without connection box, ) Perforated face adds db and increases pressure loss by % available on request. to..7 to.. 7. DS AUS Bl../
3 Radial outlet RA-N V l/s A DN V l/s A = Diffuser without collar to= Collar size to reduce effective neck diameter Sound pressure level L per diffuser in NC ) Sound power level LWA in db(a) ref. -W ) p Total pressure loss p t in Pa ) V l/s A DN V l/s A DS AUS Bl = Diffuser without collar to= Collar size to reduce effective neck diameter Sound pressure level Lp per diffuser in NC ) Note: Without acoustic lining the sound power level of the connection box is up to db(a) higher ) Based on db(a) room absorption ) Values apply for -way discharge 9 7 Sound power level L in db(a) ref. - WA W ) Correction table for -way and -way discharge: Total pressure loss p t in Pa ) Sound power level Pressure loss -way discharge + db(a) To be multiplied by. -way discharge, symmetrical + 9 db(a) To be multiplied by. -way discharge, asymmetrical + db(a) To be multiplied by.
4
5 DS AUS Bl../ Distance Dinm ADPI > 9% V = l/s l/s V = l/s l/s V for T= K K K Specific air volume flow rate Vsp in l/(s m ) Air Diffusion Performance Index (ADPI) is a single number that rates the air diffusion performance of a system of diffusers operating in a space. ADPI is affected by such factors as diffuser type and location, airflow rates, heat loads and location, space geometry, etc. To detere ADPI, air velocity and air temperature measurements are made at four different heights at a multitude of locations throughout the occupied zone in accordance with ASHRAE Standard. For each measurement point, ADPI evaluates the combined effect of local velocity and temperature deviation from average room temperature to establish whether the threat of draught or stagnation exists at that point. The temperature deviation and air velocity effects are additive, so that an increased threat of draught exists at points where the air velocity is high and the local temperature is cooler than average; similarly, an increased threat of stagnation exists at points where the air velocity is low and the local temperature is higher than average. The percentage of points that pass the ADPI test (i.e. do not fail due to draught or stagnation) deteres the ADPI percentage attained. According to ASHRAE, for an office environment in cooling mode, the design goal should be an ADPI of %. To ensure enhanced conditions of comfort, Krantz diffuser spacing graphs are based on satisfying an even more stringent ADPI of 9%. Choose RA N DN (i.e. with collar ) Minimum permissible diffuser spacing to satisfy ADPI 9% is. m (imum permissible distance to wall is half this figure, i.e.. m/=.7 m). Maximum permissible diffuser spacing to satisfy ADPI 9% is m (imum permissible distance to wall is half this figure, i.e. m/=m). Average diffuser spacing is. m. Choose RA N DN (i.e. without collar) Minimum permissible diffuser spacing to satisfy ADPI 9% is.7 m (imum permissible distance to wall is half this figure, i.e..7 m/=. m). Maximum permissible diffuser spacing to satisfy ADPI 9% is m (imum permissible distance to wall is half this figure, i.e. m/=m). Average diffuser spacing is 7. m. Choose RA N DN (i.e. with collar ) At l/s per diffuser the specific airflow at m spacing is approx l/(s m ). This system can be turned down to l/s per diffuser, equating to approx l/(s m ). Therefore, turndown to 9% (i.e. /l/s) is permissible. Choose RA N DN (i.e. with collar ) At l/s per diffuser the specific airflow at m spacing is approx l/(s m ). This system can be turned down to l/s per diffuser (without dropping below 9% ADPI), equating to approx l/(s m ). Therefore, turndown to % (i.e. / l/s) is permissible.
6 Radial outlet RA-N DN, Collar Distance Dinm DN, collar K K Specific air volume flow rate Vsp in l/(s m ) ADPI > 9% V = l/s l/s V = l/s l/s V for T= K Distance D in m DN, collar K K Specific air volume flow rate Vsp in l/(s m ) ADPI > 9% V = l/s l/s V = 7 l/s l/s V for T= K Distance Dinm DN, collar ADPI > 9% K K Specific air volume flow rate Vsp in l/(s m ) V = l/s l/s V = l/s l/s V for T= K Distance D in m DN, collar ADPI > 9% V = l/s l/s V = l/s 9 l/s V for T= K K K Specific air volume flow rate Vsp in l/(s m ) Distance Dinm DN, collar ADPI > 9% K K Specific air volume flow rate Vsp in l/(s m ) V = 9 l/s l/s V = 9 l/s l/s V for T= K Distance D in m DN, collar ADPI > 9% V = l/s l/s V = l/s K K Specific air volume flow rate Vsp in l/(s m ) 7 l/s V for T= K DS AUS Bl..
7 Radial outlet RA-N Features For high-quality, diffuse indoor air flow Suitable for VAV systems Stable supply air jets, also at imum volume flow rate Available in sizes: DN and DN. DN for 7 ranges of volume flow rate (collar type to ), DN for ranges (collar type to ) Discharge height. to. m Maximum temperature difference between supply air and indoor air: K when cooling, and + K at mand+kat.mheight when heating Low sound power level and pressure loss For installation flush with suspended false ceilings or below closed false ceilings Outlet element easy to mount or demount from the room The connection boxes are stackable, which reduces their volume for transport and storage Outlet element made from powder-coated sheet metal, connection box made from sendzimir-galvanised sheet metal Perforation increases total pressure loss by % and adds db(a) to the sound power level Type code RA N - DN / Radial outlet Non-adjustable Face Size Collar Face dimension Face finish Connection type Discharge direction Face R = Circular visible face with flush contact edge ( mm / ) for closed false ceilings Q = Square visible face with 9 turn-up ( mm) for coffered ceilings Size DN = Noal neck diameter mm DN = Noal neck diameter mm Collar = No collar; or collar size - depending on airflow Face dimension for DN : 9 x 9 mm up to 9 x 9 mm for DN : 9 x 9 mm Options: Face finish P = Perforated face Connection type F = With connection box type F D = With damper I = With insulation Discharge direction = -way discharge, = -way discharge s = -way symmetrical a = -way asymmetrical Face finish Discharge direction (viewed from behind) DS AUS Bl. 7./ P = Perforated face = -way discharge = -way discharge s = -way discharge symmetrical Subject to technical alteration a = -way discharge asymmetrical 7
8 M+W Zander Gebäudetechnik GmbH Business unit KRANTZ KOMPONENTEN P.O. Box 9, D-9 Aachen / Germany Tel: +9 ().-, Fax: +9 ().- info@krantz.com.au info@krantz.de; website:
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