Grilles Type AR. AE for return air 1 / 1.3 / B / 1

Transcription

1 Grilles Type for return air 1 / 1 / B / 1

2 Contents Description Construction Cover Page 1 Contents 2 Description 2 Construction 2 Materials Standard Sizes Technical Data Technical Data Type Nomenclature Technical Data Type Order Details Description: The grilles are suitable for wall or duct installation They may be fitted straight into the duct section or, alternatively a timber surround installation subframe may be used eg: for installation into builders work Construction: Type : Return air grille with fixed horizontal angled front blades With visible screw fixing (border counter punched) Available on request with spring clip or concealed fixing Type : Return air grille with fixed square pattern core With visible screw fixing Available on request with spring clip or concealed fixing To optimise air distribution, the standard construction -A is available with rear assembly - the -AG opposed blade action volume control damper adjustable from the front face 1 2 H + /L + H/L H + 22/L + 22 Type : Type : 2 1 H + /L + 1 H + 22/L + 22 H/L 11 Rear Assembly Duct opening with Subframe (spring clip or concealed fixing) The required duct opening with a subframe type P11 or S11 (page ) is: L + mm I H + mm 'Refer to page 21 leaflet 1/1/B/1 for sub-frame options' 2 1

3 Materials Standard Sizes Materials: The grilles are made from extruded aluminium sections, with a natural anodised finish E-C-O The grille core in the type is made from aluminium eggcrate The rear assembly is made from formed sheet steel and aluminium The surfaces are stoved enamelled black (RAL ) The installation subframe is made from galvanised sheet steel to BS 299 Standard Sizes L x H (mm) H in mm L in mm

4 Technical Data L x H in mm A in m 2 L x H in mm A in m 2 10 x x x x x x x x x x Determination of Volume Flow: The volume flow can be determined by measuring the air velocity using a rotating vane anemometer The measurement instrument should be evenly transversed across the entire grillle face to determine a value of v mean The volume flow is then: V (l/s) = Vmean (m/s) x (m 2 ) x f x V (m /h) = Vmean (m/s) x (m 2 ) x f x Corrections for in m / L W Correction factor - f - Type,2 1, φ 109

5 Technical Data Nomenclature Type Example: Data Given: -AG/ x 10 Effective inlet area = 0029 m 2 Volume flow V = 19 l/s Damper setting 100% (fully open) Diagram 1 : Sound Power Level and Pressure drop = V = 19 m/s 0029 = Pa (L W = 1 ) P t = 1 Pa Correction from table on page = - = 1 db(a) L W = 1 - = Nomenclature: V in I/s : Volume flow V in ma/h : Volume flow in m/s : Effective jet velocity in m 2 : Effective inlet area in db(a) : A-weighted sound powerlevel, based on = 01 m2 (see table for corrections) L W : rating of sound power level L w in db/oct : Octave sound power level of regenerated noise based on Aeff = 01 m2 (see table for corrections) L PA, L p : A-weighting or rating respectively of room sound pressure level L PA ~ - db L p ~ L W - db 1 Sound Power level and Pressure drop Octave band sound power levels Pressure drop p t in Pa pt LW Damper setting % open 1 2 in m/s LWA in db(a) 2 Octave band sound power levels % open 100% open 0 Damper setting 0% open =9 m/s, Octave band sound power levels Damper setting % open 0 0 = m/s =11m/s

6 Technical Data Type Sound Power level and Pressure drop Octave band sound power levels Damper setting % open 0% open 0 Damper setting 0% open = m/s Pressure drop p t in Pa 1 10 LW pt LWA 1 2 in m/s in db(a) Octave band sound power levels % open 2, Octave band sound power levels Damper setting % open 0 0 =m/s =10m/s

7 Order Details Order Code: These codes need not be completed for standard products -AG / x 0 / 0 / B1 / S11 / E-C-2 Type Grille face A Grilles plus AG Opposed blade dumper L x H see page { 0 S1 S2 State colour Natural anodised standard finish Painted according to RAL Anodised according to Euro Standard *E-C-1 to C { 0 A1 { 0 P11 S11 Standard construction (screw fixing, no subframe) Spring clip fixing with subframe Concealed fixing with subframe Without installation subframe With installation subframe * only Specification Text: Grilles for return air, preferably for wall and duct installation, consisting of borders with corner mitres and perimeter sealing strip - horizontal fixed angled front blades or square pattern core; installed by visible screw fixing (border counter punched), optional concealed fixing or spring clip fixing both with installation subfrarne To optimise air distribution, rear assembly - opposed blade action volume control damper adjustable from the front face Materials: The grilles are made from extruded aluminium sections, natural anodised finish E-C-0 The core in type is made from aluminium eggcrate The rear assembly is made from formed sheet steel, the surface is stove enamelled black (RAL ) The installation subframe is made from galvanised sheet steel according to BS 299 Order Example: Make : TROX Type : -AG/ x 0