CIRCO. Sound-attenuating transfer unit QUICK FACTS

Transcription

1 Sound-attenuating transfer unit QUICK FACTS Supplied in pairs For the transfer of air through a wall Fits in a circular cut opening Simple to install Mounting frame integrated into the transfer diffuser Accessories: -- TRAC disc valve -- VGC telescopic wall sleeve Available in alternative colours CIRCO AIR FLOW - PRESSURE DROP - R w VALUE Hole (mm) 10 Pa 1 Pa Pa R w =D n,we (db) l/s m /h l/s m /h l/s m /h The data applies to installation in a mm thick studded wall with a 10 m transmission area. One transfer diffuser on each side of the wall.

2 Technical Description Design Sound attenuating transfer unit designed for installation in studded walls, produced as circular baffles containing insulating sound-absorbing material covered by a reinforced surface layer, rated to Fire Resistance Class B-s1,d0 conforming to EN ISO The baffles have an integrated mounting frame with open slot all around. Materials and surface treatment The baffles are made of sheet steel. The mounting frame is made of galvanised sheet steel. The baffles are painted in our standard white colour: RAL 900/NCS S 000-N. The transfer unit is also available in optional standard colours: RAL 707 dusty grey, RAL 9006 white aluminium, RAL 900 jet black, RAL 9007 grey aluminium and RAL 9010 white. Adaptation Other colours are available on enquiry. Please contact your nearest sales office for information. Accessories Disc valve: TRAC. The disc valve is made of sheet steel and is painted in our standard white colour, RAL 900/NCS S 000-N. The disc valve is also available in alternative standard colours: RAL 707 dusty grey, RAL 9006 white aluminium, RAL 900 jet black, RAL 9007 grey aluminium and RAL 9010 white. Used on one side of the wall when only one sound baffle is required. Wall sleeve: VGC. Circular telescopic wall sleeve made of galvanized sheet steel. Installation Cut the opening according to table 1. The baffle's integrated mounting frame has key holes. Fasten screws above and below the cut opening and then hook the transfer unit to secure it against the screws, see Figure 1. If a wall sleeve is used, it can be secured to the wall structure. Pull the wall sleeve apart or push it together to adjust it to the thickness of the relevant wall. Figure 1. Installation. Swegon reserves the right to alter specifications. 71

3 Project planning The diffuser is designed for installation in studded walls with plasterboard covering. Concrete wall, or wall sleeve decreases the reduction index, see Table 1. Rule of thumb: R w - Transfer unit = Sound classification of the door + db(a). Calculation of the wall structure's resulting R w value is shown in the example on the next page. Table 1 specifies reduction index D n,ew for transfer units, which refer to 10 m transmission area. The measurements have been carried out according to ISO 961- Technical. The R w = D n,ew value has been evaluated in relation to reference curve i ISO The tests have been carried out in a mm thick studded wall with insulation. Maintenance The baffles can be cleaned, if necessary, using lukewarm water and dishwashing detergent. Environment The Building Materials Declaration is available from www. swegon.com. 1. a. b.. Table 1 R w = D n,ew [db], 10 m Figure. Application options. 1. Concealed installation towards a corridor.. Visible installation towards a corridor. The CIRCO can be supplemented with a TRAC (a) disc valve, or double CIRCO (b).. As in (), but with VGC wall sleeve. Cut opening in One transfer One transfer unit + Double transfer units CIRCO wall (mm) unit disc valve, s = 1 mm VGC in hole Concrete wall Decreases -6 db Decreases -10 db Decreases -6 db Decreases -10 db Decreases -6 db Decreases -10 db 0 Decreases -6 db Decreases -10 db Double transfer units = One unit on each side of the wall. Standard delivery of double transfer units. s = 1 mm slot on disc valve. 71 Swegon reserves the right to alter specifications.

4 Sizing To calculate the reduction index of the wall To calculate the total reduction index of a wall including door and transfer unit D n,ew = The R w value of the transfer unit referred to 10 m transmission area. = R w value of a wall without door and transfer unit, specified most often for 10 m. Calculate the difference between wall and door as well as transfer unit (10 m tranmission area ). Difference: - D n,ew is obtained from Table. NOTE! First recalculate the door to 10 m. Example: Door + Transfer unit Wall, R w = 0 db, without door and transfer unit. Transfer unit, R w = D n,ew = 0 db. Door, R w = db for m provides from Table R w =D n,ew =+7= db for the door for 10 m. Include the door in the calculation: -D n,ew = 0-=- Table difference = - db decreases total value of the wall by. = 8 db with door. Include the transfer unit in the calculation: = 8 db -D n,ew = 8-0 = - Table difference = - db decreases the new total value of the wall another db. Wall, total value = 6 db with door + transfer unit. Change to another transmission area The specified D n,ew value of the transfer unit provides R w for a normalised transmission area of 10 m. Recalculation to other transmission areas: Table Area (m ) 10 1 Correction (db) Example: Other transmission area Compare Swegon's transfer unit to a door which most often has a m transmission area. Door R w = db for m Transfer unit D n,ew for 10 m = 0 db Recalculate to m transmission area. The table provides the following: Transfer unit R w =D n,ew for m = 0-7 = db Tip! the transfer unit to be db better than the door since the R w value of the door will be the critical figure. Calculate using the formula: R tot = 10 x log Table ( ) S (10m x x D n,ew ) + (S x x ) R tot = The total reduction index for wall with transfer unit or door. S = The wall area. D n,ew = The D n,ew value of the transfer unit = R w for 10 m transmisson area. = The total R value for wall without transfer unit and door. S Figure. Transfer unit above door, S = wall area. Difference: -D n,ew Decrease by: - 1-1, , 0 1, Swegon reserves the right to alter specifications. 71

5 Acoustic data The specified sound levels db(a) are applicable to a normally attenuated room with 10 m equivalent sound absorption area and db room attenuation. The db(c) value is normally 6-9 db higher than the db(a) value. Sizing diagram CIRCO - One transfer unit Sound power level L w (db) Table K OK Cut opening Mid-frequency (octave band) Hz CIRCO in wall (mm) CIRCO - One transfer unit p s Pa db(a) l/s m /h CIRCO - One transfer unit + disc valve, TRAC, s = 1 mm Sound power level L w (db) Table K OK Cut opening Mid-frequency (octave band) Hz CIRCO in wall (mm) CIRCO - One transfer unit + disc valve, TRAC, s = 1 mm p s Pa db(a) l/s m /h CIRCO - Double transfer units CIRCO - Double transfer units Sound power level L w (db) Table K OK Cut opening Mid-frequency (octave band) Hz CIRCO in wall (mm) p s Pa db(a) l/s m /h 71 Swegon reserves the right to alter specifications.

6 Dimensions and weights CIRCO Dimensions (mm) B ØD ØI Weight (kg) * ,06 ØD B , ,06 0 1,86 of the opening, CIRCO = ØI. * Weight refers to units. Figure. CIRCO, dimensions. Two physical sizes. VGC C Dimensions (mm) ØD Weight (kg) , 80-0, , 80-0, of opening, VGC = ØD + mm. Figure. VGC, dimensions. TRAC ØD Ød ØA Dimensions (mm) ØA Ød ØD H max s Weight (kg) ± 0, ± 0,19 s H max ± 0, ± 0,7 Figure 6. TRAC, dimensions. 6 Swegon reserves the right to alter specifications. 71

7 Ordering key Product Circular transfer unit CIRCO a -bbb Version: : 80-1, NOTE! Supplied in pairs. Two physical sizes. Accessories Circular wall sleeve: VGC a -bbb Version: For CIRCO 80-1: : VGC 80, or 1 Specification text Example of a specification text according to VVS AMA. QMD Transfer unit Swegon s type CIRCO circular sound attenuating transfer unit, with the following features: Acoustic insulation with reinforced surface layer. Powder-painted and baked white finish, RAL 900/NCS S 000-N. : CIRCOa - bbb xx items Accessories: Telescopic wall sleeve: VGCa - bbb xx items Disc valve: TRACa - bbb xx items Disc valve: TRAC a -bbb Version: For CIRCO 80-1: : TRAC 80, or 1 71 Swegon reserves the right to alter specifications. 7