2/16/EN/7 Ceiling Diffuser Type ADLR with circular face Type ADLR-Q with square face

Description 2Quick Selection 6Nomenclature 3Determination of volume flow rate 7Acoustic Data 3Construction ׷ Dimensions 8Aerodynamic Data 4Installation Assembly ׷ Material 11Order Information 5Spectral Data 14 ADLRADLR-Q > Diffusers Type ADLR and ADLQ are recommended for flushinstallation in ceilings. In this way a coander effectђ with a radial discharge is guaranteed. Typical supply air volume flows for each size are given in the tables and diagrams. Flush mounting is not absolutely necessary for extract air applications.Typical supply air temperature differentials lie within the range of +10K...

eff In the quick-selection table below the maximum supply air is setat The effective discharge velocity v > eff is measured using a pitottube, Measurements should be taken evenly and distributed over the diffuser face, the average taken then the flow rate can be calculated from the equation below. ׇ > max , such that a sound power level L > WA max of 40 dB(A) is notexceeded. At the minimum volume flow given, the discharge velocity will not fall below v > eff of 2 m/s. This ensures that the CoandaeffectӔ necessary for a ceiling installation will be achieved.In commissioning the volume flows per...

All constructions and sizes are designed for installation in falsesuspended ceilings. If plenum boxes are used the unit is suspended on wires or slotted strip using the drillings provided, or on straps from the slab. The diffuser face is fixed by the central screw and the subframe provided. A snap-on cap is provided to cover the screw head. If a vertical rigid duct is provided on site the diffuser can be fixed by means of a cross bridge and central screw or directly to the neck of the diffuser, e.g. by self tapping screws. For these types of fixings the ...-AR mounting ring can be used.The following...

Acoustic Data Example Data given: Type ADLR; size 2 Volume flow per diffuser V = 80 l/s octave centre frequency in hz L in dB(A) 63 125 250 500 1000 2000 4000 8000 25 25 25 25 25 25 25 25 A L in dB + 15 + 4 + 4 - 2 - 9 - 14 - 19 - 25 inLdWB 40 29 29 23 16 11 6 0 Required: Octave sound power level of air regenerated noise LW Diagram 4: Lwa = 25 dB(A) A pt = 17 Pa Sound power level and Pressure drop Effective jet velocity veff: V 80 = 5.1 m/s veff Aeff- 1000 0.0157 1000 1 Sound power level and pressure drop Type ADLR-ZH Օ ADLR-Q-ZH Size 1 2 3 4 5 6 correction to diagram 1: air flow control damper...

in Pa t in Pa p t p Pressure drop Pressure drop > in Pa t in Pa p t p Pressure drop Pressure drop >

Size Size in Pa t in Pa p t p Pressure drop Pressure drop

Diagram 10:Temperature quotientBetween the diffusers at 1.70 m height above the floor, withL = A/2 + H t > 1 = 2.0/2 + 1.30 = 2.30 mthe remaining supply air temperature differential is > H1 = 0.16 m/s.At 1.70 m above the floor, at the distance to the wallL = X + H > L = 0.08 x (8) = ֖ 0.64 KAt 1.70 m height above the floor, at the distance to the wallL = X + H > 1 = 1.5 + 1.3 = 2.80 mthe air velocity v- t > 1 = 1.5 + 1.3 = 2.80 mthe remaining temperature differential is > L = 0.14 m/s.At the other distance to the wallL = X + H > L = 0.065 x (8) = ֖ 0.52 KAt L = X + H t > 1 = 2.0 + 1.3 = 3.30...

Aerodynamic Data Result: On the basis of the calculations above, both the acoustic and air distribution requirements can be met, the use of 2 x ADLR-C size 2 installed as in diagram below is recommended. H = 3.0 For a square arrangement of say 4 diffusers please multiply the air velocities from the diagrams by 1.4. 2.0 5.0 1.5 - Dimensions in m 12

Order Information Spcification Text Ceiling diffusers type ADLR (circular construction), type ADLR-Q (square construction) for flush installation in cei-lings to provide a radial horizontal discharge for supply air application. The diffuser face comprises concentrically arranged circular rings and a circular or square border with peripheral sealing strip centre cone. The diffuser face can be supplied with a rear connecting ring or flow rate control in the form of a butterfly damper adjustable from the diffuser face. Plenum box with special internal air control elements and side or top entry circular...