Instruction Manual for Lindab models including: OLC Overflow Unit, OLC, Overflow Unit
Overflow unit lindab | we simplify construction OLC Dimensions 24 Ød ØU* ØD 25 Description OLC is a circular overflow unit for installation directly into a wall. OLC consists of two sound-attenuating baffles, which are mounted on both sides of the wall. · Discrete design · Sound-attenuating baffles Maintenance The sound attenuation baffles on both sides of the wall can be removed to enable cleaning of internal parts. The visible parts of the unit can be wiped with a damp cloth. OLC Size (Ød) ØD [mm] *ØU m [kg] 100 200 108-110 0.,8 125 250 133-135 1.,0 160 300 168-170 1.,2 *ØU = Cutout dimension in wall = Ød + 10 mm Quick selection OLC Size Ød 100 125 160 pt = 10 [Pa] [l/s] [m3/h] 19 68 28 101 40 144 pt = 15 [Pa] [l/s] [m3/h] 24 86 34 122 49 176 pt = 20 [Pa] *Dn,e,w [l/s] [m3/h] [dB] 27 97 49 39 140 47 56 202 44 * Values valid for cavity wall with 95 mm insulation. Order code Product Type OLC Size 100, 125, 160 mm Example: OLC - 125 Materials and finish OLC aaa Installation bracket: Galvanised steel Front plate: Galvanised steel Standard finish: Powder-coated Standard colour: RAL 9010 or 9003, Gloss 30 The OLC is available in other colours. Please contact Lindab's sales department for further information. Lindab reserves the right to make changes without prior notice 1 2021-03-11 lindab | we simplify construction Overflow unit Accessories OLCZ - Perforated wall sleeve OLC installed in wall OLC Order code Product Type OLCZ Size Ø100, 125, 160 mm Example: OLCZ - 160 OLCZ OLC with OLCZ installed in wall OLCZ optional accessory. aaa For further information, see OLC installation instruction. 2 Lindab reserves the right to make changes without prior notice 2021-03-11 Overflow unit lindab | we simplify construction OLC Technical data Capacity Air flow rate qv [l/s] and [m3/h], total pressure loss pt [Pa] and sound power level LWA [dB(A)] are specified for a OLC unit on both sides of the wall. Dimensioning diagram pt [Pa] OLC 100 70 50 30 20 15 10 7 5 15 20 60 70 100 125 160 50 45 40 35 30 25 20 30 40 100 50 200 70 100 300 LWA dB(A) q [l/s] 150 200 V q [m3/h] 500 700 V Element-normalised reduction figure Dn,e Weighted value (Dn,e,w) evaluated according to ISO 717-1 Cavity wall with 95 mm insulation Size [mm] 100 125 160 Centre frequency [Hz] 125 250 500 1K 2K 32 46 46 48 54 34 43 43 46 51 34 40 40 44 50 *Dn,e,w 49 47 44 Cavity wall with 70 mm insulation Size [mm] Centre frequency [Hz] 125 250 500 1K 2K 100 30 40 38 42 50 125 30 37 37 42 49 160 30 34 34 40 50 *Dn,e,w 43 43 41 Solid wall without insulation Size [mm] Centre frequency [Hz] 125 250 500 1K 2K 100 24 24 23 32 40 125 23 24 23 33 40 160 24 24 23 32 39 *Dn,e,w 31 31 30 Lindab reserves the right to make changes without prior notice 3 2021-03-11 lindab | we simplify construction Overflow unit OLC Technical data Sample calculation When dimensioning an overflow diffuser, calculate the decrease in the wall's noise-reducing properties. For these calculations, the area of the wall and sound reduction figure R must be known. This is adjusted in relation to the unit's Dn,e value. Dn,e is the unit's R value given at a transmission area of 10 m2, as specified in ISO 140-10. The Dn,e value can be converted into the R value for other transmission areas using the table below. Area [m2] Correction [dB] 10 2 1 0 -7 -10 The diagram below indicates the decrease of the sound reduction index of the wall, for a given octave band value (Dn,e ) or weighted value ( Dn,e,w ). As a rough estimate the calculation can be performed directly using the wall´s Rw value and the weighted elementnormalized level difference Dn,e,w of the unit. Example: (See diagram below) : Rw (wall): Dn,e,w (diffuser): Area of wall: 50 dB 44 dB 20 m2 Number of Units: 1 Rw- Dn,e,w = 6 dB 20 m2/1 = 20 m2 Indicated reduction of Rw (wall): Rw value for wall with unit: 5 dB ~50-5 = 45 dB The calculation can also be performed using the following formula: Rres = 10 Log Swall + (10m² 10-0,1·Dn,e ) (Swall 10-0,1 · Rwall ) where: - Rres is the resulting reduction figure for wall and diffuser. - S is wall area. - Dn,e is the unit's Dn,e value. - Rwall is the wall's R value without unit. Reduction of wall (Rw) [dB] 25 20 15 10 5 0 0 5 10 Difference between wall and unit ( Rw - Dn, e, w ) [dB] 20 15 10 5 0 15 20 25 30 35 40 45 50 Area of wall [m²] / Number of units [-] 4 Lindab reserves the right to make changes without prior notice 2021-03-11Adobe PDF Library 15.0 Adobe InDesign 15.1 (Windows)