2/18/EN/2. Air Handling Lights. Type LR. Recommended for use in rooms with ceiling heights of approx m

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1 2/18/EN/2 Air Handling Lights Type LR Recommended for use in rooms with ceiling heights of approx m

2 Contents Description Description... 2 Supply Air Construction LR-Z... 3 Extract Air Construction LR-A... 4 Combined Construction LR-K... 5 Installation Details... 6 Materials... 6 Nomenclature... 8 Acoustic Data... 9 Aerodynamic Data...10 Order Details... 1 In air-conditioned buildings supply air and exhaust air is ducted into and out of rooms, suspended ceilings are installed which mask this equipment from the working space. From cost considerations the depth of ceiling void is kept to a minimum ensuring sufficient space for ducts, plenum boxes, light fittings etc. Openings are required in the ceiling for air diffusers and flush lights. As the visual impression of a ceiling depends not only on the ceiling elements but also on the air diffusers and lights used, it is useful to combine the two. By combining the two components, the architect can optimise the design of the ceiling further. In this technical brochure, we introduce Trox Air Handling Lights Type LR. In a combined air and light fitting, the customer can specify the manufacturer and type of light fitting to be integrated with the Trox diffuser. The opening size in the diffuser is designed to accept the most common light diameters produced by Staff GmbH and Co. KG. The Trox air diffuser is designed so that the light ordered can easily be fitted on site. Trox air lights are available in 5 sizes for supply air, extract air or as a combination of the two. They are all characterised by sophisticated design, excellent air conditioning functions, low noise level and a flat construction. Trox also offer other Air/Light Combinations. 2

3 Supply Air-Construction LR-Z-... The air handling light type LR-Z is suitable for supply air. The air flows evenly out through the diffuser annulus and discharges horizontally along a ceiling. If required, an airflow control damper can be fitted in the entry spigot. The light fitting is enclosed in a sheet metal cylinder. The heat from the bulb can dissipate into the false ceiling void through an opening in the top of the cylinder. k1 / k Ø 198 Ø D Ø R Size D K 1 K 2 R

4 Extract Air-Construction LR-A-... Air handling light type LR-A is designed for extract air application. The air is exhausted through the diffuser annulus. The heat from the bulb is also removed with the extract air. If required, an airflow control damper can be fitted in the connecting spigot. k 1 / k 2 H1 H2 Ø 123 Ø D Ø R Size D H 1 H 2 K 1 K 2 R

5 Combined Construction LR-K-... The air handling light type LR-K is designed for a combination of supply and extract air. The supply air flows evenly out through the outer annulus of the diffuser and discharges horizontally along a ceiling when flush mounted. The extract air is exhausted through the inner annulus. There is no risk of contact between the supply and extract air, as the connections and internal fittings have been designed to prevent this. The extract air volume flow should never be set higher than the supply air flow. The heat from the bulb is removed with the extract air. If required, an airflow control damper can be fitted in the entry spigot for the supply air. k 1 / k Ø 198 Ø 198 Ø D Ø R Size D K 1 K 2 R

6 Installation Details Materials Installation details The plenum box hangs from the support brackets such that the bottom of the diffuser spigot lies flush with the ceiling line. The push-in mounting frame is then fitted and screwed in place. The diffuser face with the light already fitted, is mounted using special quick release fasteners. Fasten the safety cable provided and insert the plastic plugs. The elctrical connection cable is pushed through the grommet in the top of the box. The reflector and bulb (s) are then fitted. When the diffuser face is removed, the control damper in the inlet or outlet spigot can be adjusted using a screwdriver. Materials The diffuser face is pressed galvanised sheet steel to DIN The surface is phosphate treated and white stove enamel finish (RAL 9002). The plenum box is made from sendzimir galvanised sheet steel to DIN Suspension by others Connection spigot Ø DA Ceiling Plenum Box fitting flush with ceiling 4 of f sheet metal fixing screws Push in mounting frame Cable connection for light Light fitting frame Special quick release fastener Dif fuser face 6

7 Installation Details Electrical connection cable Fit split-pin into hole provided Safety cable fixed to rear of diffuser Install diffuser face with quick release fasteners Insert plastic plug Fit reflector Size Ceiling opening diameter Type LR-Z Type LR-K Type LR-A Push and twist to open and close Screwdriver

8 Nomenclature Technical Data Example Data given: Combined air handling lights for supply and extract air are to be used in a conference room. Staff lights with an installation diameter of 135 mm will be used in a grid size A = 1. m. Room height H = 3.10 m Specified noise level L WA = 35 db(a) Room air change rate n = 8 Supply air temperature differential t z = 6 K Consequently: V = 1.2 x 1.2 x 3.1 x 8 10 l/ s 3.6 Nomenclature V LtL L H= m 1.80m V H1 t L A. V in l/s : Volume flow per diffuser in m3/h : A, B in m : Distance between two diffusers H1 in m : Distance between ceiling and occupied zone L in m : Horizontal + vertical distance (X + H1) or (A/2 + H1) VH1 in m/s : Time average air velocity, between two diffusers at distance H1 from ceiling VL in m/s : Time average air velocity, at wall tz in K : Temperature difference between supply air and room air tl in K : Difference between core temperature and room temperature at distance L = A/2 + H1 or L = X + H1 Pt in Pa : Total pressure drop (supply air) LWA in db(a) : A-weighted sound power level LWNC : NC rating of sound power level H 1 LWNR : LWNR = LWNC + 2 LpA, LpNC V tz X L VL tl 75 : A-weighting and NC rating respectively of room sound pressure level LpA LWA 8 db LpNC LWNC 8 db Corrections to diagram 1: Damper setting Blade angle 0º 45º 90º pt x 1.0 x 1.1 x 1.4 Size 110 L and 135 WA + 1 L WNC + 1 P t x 1.0 x 1.0 x 1.1 Size 160 L WA + 1 L WNC + 1 p t x 1.0 x 1.1 x 1.2 Size 0 L WA L WNC p t x 1.0 x 1.1 x 1.2 Size 240 L WA L WNC Corrections to diagram 2: Damper setting Blade angle p t x 1.0 x 1.5 x 4.0 Size 110 L WA L WNC p t x 1.0 x 1.5 x 3.5 Size 135 L WA L WNC p t x 1.0 x 1.5 x 3.5 Size 160 L WA L WNC Corrections to diagram 3: Damper setting Blade angle 0º 45º 90º p t x 1.0 x 1.5 x 3.5 Size 0 L WA + 5 L WNC + 5 p t x 1.0 x 1.4 x 3.0 Size 240 L WA L WNC

9 Acoustic Data V is therefore too low for size 135 (see diagram 6). If every 2nd light is combined, we get: 2.4 x 2.4 x 3.1 x 8 V = 40 I/s 3.6 Diagram 1 : Sound Power Level and Pressure Drop for supply air side L WA = 25 db (A) (L WNC = 19 NC) p t = 12 Pa Diagram 4 : Sound Power Level and Pressure Drop for extract air side L WA = 25 db (A) (L WNC = 19 NC) p t = 8 Pa The noise level of the air handling lights is L WA = 28 db (A) by adding the levels Diagram 5 : Temperature quotient L = = 2.40 m t L / t z = 0.09 t L = 0.09 x ( 6) = 0.54 K between 2 diffusers L = = 2.40 m t L / t z = 0.09 t L = 0.09 x ( 6) = 0.54 K at the wall With symmetric distribution, the two temperature differences are equal. Diagram 6 : V H1 = 0.16 m/s, V L = 0.24 m/s Air velocity Solution : Every second light in a row will be designed as an air handling light. One row of lights only comes between two rows in which every second light is an air handling light. If, for aesthetic reasons, all lights should have the same design, the diffuser face without the plenum box can be combined with a light. 1 Sound Power Level and Pressure Drop for type LR-Z and supply air side of type LR-K Pressure Drop Pt in pa Pressure Drop Pt in pa LWNC LWNC LWA in db(a) I/S m 3 /h Sound Power Level and Pressure Drop for type LR-A Size V V LWA in db(a) I/ S m 3 /h Sound Power Level and Pressure Drop for type LR-A Size Size Pressure Drop Pt in pa V LWNC LWNC LWA in db(a) I /S m 3 /h Sound Power Level and Pressure Drop for extract air side type LR-K Size Pressure Drop Pt in pa V LWA in db(a) I/S m 3 /h

10 Aerodynamic Data Ef fective free area (Type LR-Z and supply air side LR-K) Size A e ff in m Temperature quotient at distance L Temperature quotient t L / t z Size 110 / /240 I /s (m3/ h) 40 (145 ) (110) 25 ( 90 ) ( 70 ) V = (125 ) 7 Air velocity size I /s (m3/ h) 40 (145) 35 (125) ( 90 ) 6 Air velocity sizes110 and Air velocity sizes 0 and 240 H 1 = m VH1 in m/s H 1 = m m m 0. Distance L 0. VL in m/ s VH1 in m/s VH1 in m/s H 1 = m 0. (5 5) ( 70 ) V = V = (110 ) Spacing A or Distance L I /s (m3/ h) 35 (125) 30 (110) 25 (90 ) (70 ) VL in m/ s VL in m/ s m Spacing A or Distance L m Spacing A or Distance L 10

11 Order Details Order Code These codes do not need to be completed for standard products. LR -Z -M S1 RAL 9010 Supply Z Extract A Combination K (supply and extract) Air flow control M 1) damper 1) For combination units (supply and extract) control damper only available in the supply air spigot Size (installation ø of light) Not used State colour S1Painted to RAL... 0 Standard finish RAL 9002 Note : For a given nominal size the overall face size of LR-Z and LR-K are the same but LR-A is different. However all air handling lights accomodate the same size light fitting, see pages 3-5. Specification Text Air handling lights in circular construction for horizontal air discharge, comprising the diffuser face with concentric annuli for supply and exhaust air, spacing 14 mm, and plenum box fitted at rear with internal special air control elements, circular side mounted spigots (with optional flow control damper), mounting brackets and adjustable height push-in mounting frame to compensate for ceiling irregularities. Diffuser face fixed with two quick release fasteners for easy removal, and designed fro the installation of circular light fittings by the customer (down lighters). Material : The diffuser face is made from sheet steel. The surface is phosphate treated and white (RAL 9002) stove enamel finish using the electro-dipcoat process, resistant to saturated environment for a minimum 100 hours without deterioration (DIN)50017). The plenum box is made from sendzimir galvanised sheet steel to DIN Order example: Make : TROX Type : LR-Z-M/

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