SAL 35 Â® Catalog - NAD Klima

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NAD KlimaLinear diffuserConfiguration and Method of operationControlling the direction of airflowIndexing- rangeA21B3C4D56EFVolume flowmin. max.3/25/42/16/51/AA/B4/3F/6E/FB/CC/DD/EDirection of air flowConfiguration1 Extruded aluminum profile2 Additional profile, wide or narrow3 Eccentric cylinders4 Plenum5 Air directing blade6 Reading and setting diskThe SAL 35 linear slot diffuser iscomprised of a profile of extrudedaluminum (1) with an additionalprofile, narrow or wide (2), eccentriccylinders (3) sliding into the profile andrevolving a full 3600, and a plenum (4)The eccentric cylinder (3), withoptimized acoustics and aeraulics, has,on its axis, aside from multiple profilesdirecting the airstream (5), a readingand setting disk (6) on which alphanumericalcharacters are inscribed. Thecharacters on this disk define andreproduce the cylinders setting at will.The profiles on the plenum arefastened by rivets for suspendedceiling applications and by a centralscrew for gypsum ceilings.Method of operationThe eccentric cylinder, aided by theprofiles, create a strong stream,dragging in the air. Near the cylinder'ssurface, an air depression takes place.In this manner, exiting air from the slotflows out steadily and changes directionwithout hindering the low soundpower. Simultaneously, an importantinduction of ambient air takes placewith the exiting air zoneThe positioning of the eccentriccylinder permits the adjustment of theair blast without levelling off, with orwithout reducing the exiting airsection.To maintain the air blast's consistencyand direction perpendicular to thecylinder's axis with the most regularitypossible, the cylinder has smallprofiles that direct the air stream.Mode of operationSetting air blast directionDue to the depression zone around theeccentric cylinder, the air flow directionis adjustable in a 180° range. For everydirection, there are two cylinderpositions (with section "reduced" or"not reduced"). This is illustrated in thefollowing diagram. If diffusers arefree-hanging, the air blast direction isalways such as indicated on thediagram. When installed flush withceiling, with an active cylinder length of300 mm, under-the-ceiling airflow willtake place by Coanda effect in cylinderpositions EF, F6, 1A, AB and 21, 32, 54,65. The cylinders, each individuallyadjustable, are 100 mm in length.The result is a seemingly infinite quantityof airflow combinations. At theplant, cylinders are normally set atalternating positions 1A and F6(diffused mode). This setting provides ahigh induction airflow that can beprovided even with high cooling loadsand high air changeover figures.2 1.1.3 SAL 35Subject to technical changes. Version 27 / 03 / 2013
NAD KlimaLinear diffuserSelection the number of slotsImportant :In order to facilitate SAL selection, it isessential to calculate the total airflow ratefor active lengths of 1 m.Air flow V . [m / h/m SAL]100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 140081Specifications:Height of diffuser:H = 3.00 mAirflow rate by diffuser: Vo = 384 m 3 /hCooling: ∆T = - 15°CHeating:∆T = +15°CLength of SAL:L = 1500 mmRequirements:1- Airflow rate per metre of slot section2- Number of slots n in cooling modeSolution:1 Each slot of 1500 mm = 1.5 m length,Dividing then by 1.5 in order to findthe airflow rate by meter of slot :324 m³/h ÷1.5 = 256 m³/h/m2From diagram "Selection the numberof slots", in a cooling mode, we notethe number of slots : n = 3Number of slots76543212CFM/PI18 36 55 72 90 110 125 140 160 180 200 215 235 250Cooling only for all heightsHeating and cooling or cooling only for heights ≤ 3,0 mHeating and cooling or heating only for heights of 3,0 m - 4,5 m 120 - 150 (22 - 27)Heating and cooling or heating only for heights of 4,5 m - 7,0 m* 150 - 170 (27 - 31)* validate the sound level.Air Flow by meter of slot of SAL 35 V m 3 /h/m/slot0(cfm/li.ft/slot)50 - 120 (10-22)-If the heating mode to the heights above 3 m can be selected to an initial rate, reduce the length Lsof the slot in accordance with the air flow per meter of recommended slotDischarged Airflow RateV . .VmaxAir volume flow ratioV . V . max[°]Angle of the direction of airflowThe opposite diagram illustrates theratio between the diffuser's exitingairflow and the cylinder's position, thesystem's pressure remaining the same.On the other hand, by a pressureincrease upstream, the velocities ofexiting air may be noticeably increasedby maintaining the same airflow rateand a "reduced" cylinder position.3 2 1 A B C D E F 6 5 4Drum positionSubject to technical changes. Version 06 / 09 / 2012 1.1.3 SAL 353
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SAL 35 Â® Catalog - NAD Klima

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