VAV Controllers LVC-LowVelocity - TROX

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Air-regenerated noise 1 LW₂ LW 2 LPA LPA₁ 3 4 5 Example Given: V max = 50 l/s (180 m³/h) ∆pst = 150 Pa Required sound pressure level in the room 45 dB(A) For further assumptions, see calculation Calculation Quick selection: LVC-LowVelocity / 160 Air-regenerated noise LPA = 44 dB(A) Case-radiated noise LPA₂ = 28 dB(A) LPA₂ 1 LVC-LowVelocity 2 Circular silencer CS/CF 3 Air distribution to several diffusers 4 Duct bend 5 End reflection based on diffuser Nominal size V Air-regenerated noise ∆pst = 50 Pa ∆pst = 150 Pa ∆pst = 300 Pa LW in dB LW in dB LW in dB fm in Hz fm in Hz fm in Hz l/s m³/h 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 8 30 42 29 29 36 27 16 4 7 44 36 39 45 39 31 17 22 45 41 45 50 47 41 26 31 125 30 110 55 47 44 43 33 27 19 14 57 54 53 52 45 42 32 29 59 59 59 58 53 51 41 38 55 200 61 55 50 47 36 31 26 17 63 62 59 55 48 46 39 32 65 67 65 61 56 56 47 41 75 270 64 59 54 49 38 34 30 19 67 67 63 57 50 49 43 34 68 71 69 63 57 58 51 43 12 45 41 30 40 36 27 19 22 7 45 68 47 45 39 35 35 25 47 43 51 50 46 45 43 37 160 50 180 49 45 46 40 34 27 26 13 53 53 53 49 45 43 39 32 55 58 58 55 53 53 48 44 85 305 52 51 48 42 36 31 28 16 56 59 56 51 48 46 41 35 58 64 60 57 56 56 49 46 120 430 54 55 50 44 38 33 29 18 58 63 57 52 50 48 42 36 60 68 62 58 57 58 50 48 20 70 42 31 40 39 30 23 19 8 44 39 46 48 41 38 34 24 45 44 50 53 48 48 53 35 200 75 270 53 44 44 42 36 30 24 14 55 52 50 50 47 45 39 30 56 58 54 56 54 55 48 41 135 485 58 49 45 43 38 33 26 16 60 58 51 51 49 48 41 33 61 63 55 57 56 58 50 43 190 685 61 52 46 43 40 35 28 18 63 61 52 52 51 50 42 35 64 66 56 57 58 60 52 45 30 110 35 33 43 38 31 28 20 13 42 41 49 46 42 42 37 30 46 47 52 51 49 50 47 41 250 120 430 47 45 45 41 37 37 25 18 54 53 51 49 48 50 42 35 58 59 55 54 55 58 52 46 210 755 52 50 46 42 40 40 27 20 58 58 52 50 50 53 44 37 62 64 56 56 57 62 54 48 300 1080 55 53 47 43 41 42 29 22 61 61 53 51 52 55 45 39 65 67 57 56 59 64 56 49 8
Case-radiated noise Example (contd.) Calculation of air-regenerated noise fm 63 125 250 500 1000 2000 4000 8000 LW 53 53 53 49 45 43 39 32 Distribution 0 0 0 0 0 0 0 0 Duct bend 0 0 1 2 3 3 3 3 End reflection 10 5 2 0 0 0 0 0 Sound power level to room 43 48 50 47 42 40 36 29 Room attenuation 6 6 5 5 4 4 4 4 A-weighting −26 −16 −9 −3 0 1 1 −1 Corrected level 11 26 36 39 38 37 33 24 LPA 44 Calculation of case-radiated noise fm 63 125 250 500 1000 2000 4000 8000 LW₂ 30 23 25 29 33 32 25 24 Ceiling attenuation 4 4 4 4 4 4 4 4 Room attenuation 6 6 5 5 4 4 4 4 A-weighting −26 −16 −9 −3 0 1 1 −1 Corrected level 0 0 7 17 25 25 18 15 LPA₂ 29 In a variation from the quick selection, different room attenuation values have been assumed. The logarithmic addition of air-regenerated noise and case-radiated noise equals 44 dB(A) and does therefore not exceed the required sound pressure level of 45 dB(A). Nominal size V Case-radiated noise ∆pst = 50 Pa ∆pst = 150 Pa ∆pst = 300 Pa LW₂ in dB LW₂ in dB LW₂ in dB fm in Hz fm in Hz fm in Hz l/s m³/h 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 63 125 250 500 1000 2000 4000 8000 8 30 25 6 7 12 14 4 7 13 26 14 16 20 24 18 21 28 27 18 21 26 30 26 29 38 125 30 110 28 18 19 21 22 15 13 10 29 25 27 29 32 29 27 25 30 30 33 35 38 37 35 35 55 200 29 23 24 25 26 20 16 8 31 30 32 33 35 33 29 24 31 35 38 39 42 42 38 33 75 270 30 26 27 27 28 23 17 7 31 33 36 36 37 36 31 23 32 38 41 41 44 45 40 33 12 45 24 5 6 12 15 9 3 4 26 10 13 20 25 22 19 22 28 13 18 25 31 30 28 33 160 50 180 28 18 18 21 24 19 9 7 30 23 25 29 33 32 25 24 31 26 30 34 40 40 35 36 85 305 29 23 22 24 27 23 12 8 31 28 30 32 37 36 28 26 33 31 35 37 43 44 38 37 120 430 30 27 25 26 30 25 14 9 32 32 33 34 39 38 29 26 34 35 38 39 45 47 39 38 20 70 26 10 14 19 13 8 4 7 28 16 20 28 24 22 19 22 29 19 24 34 31 31 29 32 200 75 270 29 19 21 25 22 18 11 9 31 24 27 34 33 32 26 24 32 27 31 39 40 41 36 34 135 485 30 22 24 27 26 22 14 9 32 28 30 36 37 36 29 25 33 31 34 42 43 45 39 34 190 685 31 25 26 28 28 25 15 10 33 30 32 37 39 39 31 25 34 33 36 43 46 48 40 35 30 110 24 13 8 19 23 18 11 2 26 17 17 27 32 30 26 21 28 20 22 32 38 38 36 33 250 120 430 28 22 18 25 30 27 17 7 31 27 27 33 39 40 33 26 32 30 32 38 45 47 43 38 210 755 30 26 22 27 33 31 20 9 32 30 31 35 42 44 35 28 34 33 36 40 48 51 45 40 300 1080 31 28 25 29 35 34 22 10 34 33 33 37 44 46 37 29 35 36 38 42 50 54 47 41 9
Page 1 and 2: 5/5/EN/1 VARYCONTROL VAV Controller
Page 3 and 4: Innovation TROX LVC-LowVelocity - t
Page 5 and 6: Construction · Dimensions Characte
Page 7: Acoustic quick selection Using quic
Page 11 and 12: Flow characteristics · Wiring exam

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