SLOT DIFFUSERS, ROUND DUCT DIFFUSERS

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2 SLOT DIFFUSERS, ROUND DUCT DIFFUSERS Slot diffusers LD-3, LD-4, LD-5 LD-3 LD-4 LD-5 SLOT DIFFUSERS Application: Slot diffusers are designed for air supply in rooms with floor to ceiling heights of 2.5 to 4 m. They are suitable for supplying either cold or warm air, in particular in applications where air conditioning comfort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems. Description: Diffuser face plate is made of anodized aluminium sections with built-in cylindrical deflectors made of recycled plastics. Deflectors allow continuos adjustment of discharged air direction within the 360 o range. The diffuser plenum box is made of galvanised sheet steel and has a flow rate control damper built in its inlet spigot, to allow fine adjustment of the desired air flow rate. LD-6N Panel design slot diffusers LDP-3 and LDP-4 LDP-4 Round duct diffusers SKD-3 SKD-3D Software: Klima ADE 5.3 LD and SKD Software PANEL DESIGN SLOT DIFFUSERS A panel design slot diffuser consists of a face plate and a plenum box. Cylindrical air deflectors, equal to those in LD-3 and LD-4 diffusers, are installed in the slots, to allow continuous adjustment of discharged air direction within the 360 o range. On order, diverse plate designs and slot patterns are available. ROUND DUCT DIFFUSERS Application: Round duct diffusers can be installed at various locations within the duct network. They are suitable for supplying either cold or warm air. Description: They are made of galvanised tubes with slots equipped with cylindrical air deflectors equal to those in the LD-3 slot diffuser, to allow adjustment of air direction and flow rate. As standard, the tube and cylindrical deflectors are in RAL 900 white colour. SOFTWARE: KLIMA ADE 5.3 LD and SKD Software: - available calculation and graphical display of air supply for slot diffusers LD-3, LD-4 and LD-5 - available calculation of technical specifications for the application of wall- or ceiling-mounted slot diffusers - available calculation of ceiling-mounted multiple-diffuser configuration air supply - application of vertical or horizontal slot diffuser air supply into the room, depending on the mode of operation - heating or cooling - the package supports basic air supply mode models for the SKD-3 round duct diffuser - available calculation of SKD-3 round duct diffusers cooling mode: single-side and two-side horizontal supply and alternating horizontal supply heating mode: vertical air supply

3 AIR DISTRIBUTION Slot diffusers, Round duct diffusers Slot diffusers Page Slot diffusers LD-3 and LD Technical data for Slot diffusers LD-3 and LD Slot diffusers LD Floor slot diffusers LD-6N...79 Panel design slot diffusers LDP-3, LDP Round duct diffusers Round duct diffusers SKD Legend of symbols St RAL 900 Element is made of aluminium profiles, aluminium sheet or aluminium casting. Element is made of steel sheet. Element is powder painted in standard RAL 900 colour. Other desired colour is to be specified in the order. Shady symbol means possibility of optional material, surface protection, motor version,... Element is intended to be built in the floor. Element is intended to be built in the wall. Element is intended to be built in the ceiling or in the wall. Element for air conditioning of rooms with floor to ceiling heights room up to 4m. Element for air conditioning of rooms with floor to ceiling heights from 6 to 5m. Element is suitable for the supply of warm air (heating). M CD Element is suitable for the supply of cool air (cooling). Element allows regulation by electric motor (Belimo electric motors). Element is intended for air filtration. The filter of class... is built in. The possibility of the automatic selection and calculation of the technical characteristics of grilles and difusers in regard to the given conditions with the assistance of the Klima ADE program.

4 SLOT DIFFUSERS LD-3, LD-4 LD-3 LD-4 RAL CD Slot diffusers LD-3, LD-4 Application: LD-3 and LD-4 slot diffusers are designed for the supply of air in rooms with floor to ceiling heights of 2.5 to 4 m for supplying either cold or warm air, in particular in applications where air conditioning comfort demands are stringent. Due to their high induction rate and rapid decrease of temperature difference, these diffusers are also suitable for variable systems. Description: LD-3 and LD-4 slot diffusers are designed in, 2, 3 and 4-slot versions. Diffuser face plate consists of anodised aluminium sections with built-in cylindrical deflectors made of recycled plastics. Deflectors allow continuos adjustment of discharged air direction within the 360 o range as well as control of supply air flow rate. The cylindrical deflectors also allow full shutting of the diffuser. The slot diffuser plenum box is made of galvanised sheet steel and has a flow rate control damper built in its inlet spigot, to allow fine adjustment of the desired air flow rate. B φ D H H LD Component parts: Plenum box 2 Inlet spigot 3 Volume control damper 4 Main section 5 Cylindrical deflector 6 Side lateral section 7 Connecting section 8 Outside insulation 5 A E 7 a Installation openings: (A+5) x (L+5) Control schematic of the spigot volume control damper: 8 LD A 7 E Installation openings: (A+5) x (L+5) 62

5 SLOT DIFFUSERS LD-3, LD-4 LD-3/ LD-4/ LD-3/2 LD-3/3 LD-3/4 LD-4/2 LD-4/3 LD-4/4 Slot diffuser types: Single-slot (designation LD-3,4/) Two slots (designation LD-3,4/2) Three-slots (designation LD-3,4/3) Four-slots (designation LD-3,4/4) LD-3 O/ LD-3 O/2 LD-3 O/ LD-4 O/ LD-4 O/2 LD-4 O/ Slot diffusers LD-3 O and LD-4 O Narrow version - New installation method The narrow slot diffuser differs from the conventional slot diffuser construction as regards its mounting to the ceiling or wall. The conventional slot diffuser has a L-crosssection mounting sleeve which remains visible and may, in certain applications, interfere with aesthetic requirements. The new design has eliminated this deficiency as well as introduced improved structural rigidity due to its reinforced sleeve. The product is thus suitable for installation in cooling suspended ceilings as well LD-3 O/4 4.5 LD-4 O/ LD-3 O, LD-4 O LD-3, LD-4 LD-3 No. of slots H H B A E F LD-4 No. of slots H H B A E F Standard lenghts L LD-3 and LD-4 slot diffusers are available in standard lengths ranging from L=300 to L=00 mm, with a 00 mm step. In cases where longer diffusers are required, they can be joint together by means of (rail-type) connecting plates. Plenum boxes are also available in standard lengths ranging from 300 mm to 00 mm. Special orders: On customer s request slot diffusers can be made in other dimensions. End seals and longitudinal sections are painted in any RAL scale colour according to the customer s request. As standard, cylindrical deflectors are black or white, on the customer s request, they can be coloured in any RAL scale colour. Non-standard colours and extra components are to be ordered separately. 63

6 SLOT DIFFUSERS LD-3, LD-4 L 300 to to to 00 Number Number and diameter of inlet spigots of slots LD-3 LD-4 LD-3 LD-4 LD-3 LD-4 x 98 x 23 2 x 98 2 x 23 2 x 23 2 x 38 2 x 38 x 58 2 x 23 2 x 38 2 x 38 2 x 58 3 x 58 x 98 2 x 38 2 x 58 2 x 58 2 x 98 4 x 98 x x 58 2 x 98 2 x 98 2 x 223 Number and diameter of inlet spigots Standard lenghts: from 300 mm to 000 mm Number of slots: Standard lenghts: from 000 mm to 00 mm Number of slots: 2 J L/2 L/2 J Position of inlet spigots: Number Standard Position of inlet spigots length of spigots L/ J = J = 400 angle Slot diffuser face plate designs: Slot diffuser face plates are made of linear or angular ended sections, which allow the diffusers to be joined at different angles Angular ended sections are not fitted with air direction controls. 300 Cylindrical deflectors: Cylindrical deflectors are the most important components of a slot diffuser. They allow adjustment of both air flow rate and direction. Cylindrical deflectors are made of recycled plastics. As standard, they are black or white. End seals End seals are components of the diffuser face plate. They are available in two designs: as an angle piece (E on both ends, ET on one end only) or plates (F on both ends, FT on one end only). The connecting strip-section has no end angle pieces or plates seals (designation T). Joining diffusers together in length and width Joining in width (into diffusers with multiple slots) requires special strip sections, while joining in length requires connecting plates (the total length of combined diffusers is not limited). 64

7 SLOT DIFFUSERS LD-3, LD-4 Fixing of the plenum box onto LD-3, LD-4 diffusers with self-tapping screws (designation U) with spring clamps (designation S) with a cross-member (designation Z) Fixing with self-tapping screws (U) Fixing with spring clamps (S) Fixing with a cross-member (Z) Installation methods: with a threaded bar (designation R) with a wire (designation R) with suspension brackets on the plenum box (designation P) with special fixing elements (designation R) with springs (designation N) Installation with a threaded bar (R) Installation with wire (R) Installation with suspension bracket (P) Installation with special fastening elements (R) Installation with springs into ducts (N) 65

8 SLOT DIFFUSERS LD-3, LD-4 Types of air discharge a b LD-3 Discharge direction Min. air flow rate Max. air flow rate Standard (left, right) Standard (right) c d 0ß Discharge angle LD-4 Standard (left) Standard (vertical) Discharge direction Min. air flow rate Max. air flow rate e f g Air jet angle 60 o (left, right) Air jet angle 60 o (right) Air jet angle 60 o (left) Discharge angle Top view Slot diffuser with actuator controlled discharge direction Slot diffusers with actuator controlled discharge direction are suitable for summer-winter air supply applications. The desired direction of air jet is achieved by means of an electric actuator which moves a slider. Manual adjustment is therefore not necessary. Compared with standard slot diffusers, air flow rate is reduced by %. Component Parts: Slot diffuser 2 Deflector 3 Electric actuator In case the discharge angle is to be adjustable by means of an electric actuator (winter-summer application), this requirement shall be specified in the ordering form. Every second row Adjustment of deflectors for warm air supply Every second row 2 Adjustment of deflectors for cold air supply 66

9 SLOT DIFFUSERS LD-3, LD-4 Ordering key: LD-3//B/E/K/M/S/P/I/g L=700 I5 I9 I9 N P R Z S U Length L=300, 400, 0,..., 00 (single piece) Type of air discharge (a, b, c, d, e, f, g) Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box. sound and thermal insulation (from -40 o C to 05 o C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material). sound and thermal insulation (from -40 o C to 05 o C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material). Installation with spring clamps without plenum box (LD-3 and LD-4 only) Installation of the plenum box with hangers Installation with brackets built in the basic section Fixing of the diffuser to the plenum box with a cross-member Fixing of the diffuser to the plenum box with spring clamps Fixing of the diffuser to the plenum box with self-tapping screws M K Volume control damper Plenum box E ET F FT T B W End sealing on both ends End sealing on one end End plate on both end End plate on one end Rail-type without end sealings and plates Black deflectors White deflectors LD-3 LD-4 LD-3 O LD-4 O Number of slots Slot diffuser Narrow slot diffuser Please specify the deflector colour in your order. Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order. For the LD-3 0 and LD-4 0 type, the following end seals are available: F, FT and T. When installing in cooling ceilings, consult the manufacturer. In the case the slot diffuser is ordered complete with plenum box, the air jet configuration is set as shown on the diagram on page 66. Versions with insulation on the inside of the plenum box are also available. 67

10 SLOT DIFFUSERS LD-3, LD-4 TECHNICAL DATA Fast selection diagram: L WA < 35 db(a) 4 3 Nr. of slots 2 LD-3 LD Q(m 3 /hm) Technical specifications for one-slot diffuser, per meter of lenght, at horizontal discharge: A(m 2 ) Q(m 3 /h) L WA (db) LD-3 0, LD-4 0, H A L VH ΔtH L x VL ΔtL L x VL ΔtL H VH ΔtH A L VL x ΔtL Q (m 3 /h) x (m) H (m) L (m) V L (m/s) Δt z (K) Δt L (K) Δp (Pa) L WA (db(a)) v H (m/s) A, B (m) H (m) Air flow rate Horizontal distance to the wall Room height Throw distance (L=H+x) Air velocity at the throw distance L Temperate difference between the supply and room air Difference between the core and room air temperature Pressure drop Sound power level Air velocity at the distance H Distance between diffusers, in length and in width throw distance 68

11 SLOT DIFFUSERS LD-3, LD-4 TECHNICAL DATA Air velocity diagrams for LD-3, at different throw distances: One or two sided horizontal discharge: H (m) LD-3 / LD-3 / LD-3 / LD-3 / LD-3 / LD-3 / LD-3 / LD-3 / V H (m/s) V (m/s) L A (m) L (m) Alternate sided horizontal discharge: H (m) LD-3 / LD-3 / LD-3 / LD-3 / LD-3 / LD-3 / LD-3 / LD-3 / V H (m/s) V (m/s) L A (m) L (m) 69

12 SLOT DIFFUSERS LD-3, LD-4 TECHNICAL DATA Air velocity diagrams for LD-4, at different throw distances: One or two sided horizontal discharge: H (m) LD-4 / LD-4 / LD-4 / LD-4 / LD-4 / LD-4 / LD-4 / LD-4 / V H (m/s) V L (m/s) A (m) L (m) Alternate sided horizontal discharge: H (m) LD-4 / LD-4 / LD-4 / LD-4 / LD-4 / LD-4 / LD-4 / LD-4 / V H (m/s) V (m/s) L A (m) L (m) 70

13 p (Pa) t SLOT DIFFUSERS LD-3, LD-4 TECHNICAL DATA Sound power level and pressure drop: LD 3/ LD 3/ L wa (db(a) ) p t (Pa) L wa (db(a) ) Q (m 3 /h) Q (m 3 /h) Correction factors applicable to LD-3/ Type of discharge vertical horizontal Flow rate control damper open closed open closed L=0 x x,44 x 0,87 x,34 L=000 x x 3,30 x 0,85 x 3,02 L=0 x x 5,26 x 0,84 x 4,47 L=00 x x 7,37 x 0,8 x 5,68 Correction factors applicable to LD-3/2 Type of discharge vertical horizontal Flow rate control damper open closed open closed L=0 x x,9 x 0,86 x,79 L=000 x x 5,9 x 0,70 x 5,3 L=0 x x 9,88 x 0,58 x 8,67 L=00 x x 4,0 x 0,47 x,99 Example: Q = m 3 /h L = 000 mm Δp t = 4 Pa (vertical; damper closed) Δp t = 4 x 3,30 = 46,2 Pa (vertical; damper closed) Δp t = 4 x 0,85 =,9 Pa (horizontal; damper opened) Δp t = 4 x 3,02 = 42,3 Pa (horizontal; damper closed) L WA = 32 db(a) Example: Q = m 3 /h L = 0 mm Δp t = 22 Pa (vertical; damper opened) Δp t = 22 x,9 = 42,0 Pa (vertical; damper closed) Δp t = 22 x 0,86 = 8,9 Pa (horizontal; damper opened) Δp t = 22 x,79 = 39,4 Pa (horizontal; damper closed) L WA = 30 db(a) 7

14 p (Pa) t t SLOT DIFFUSERS LD-3, LD-4 TECHNICAL DATA Sound power level and pressure drop: LD 3/3 LD 3/ LwA (db(a) ) p (Pa) L wa (db(a) ) Q (m 3 /h) Q (m 3 /h) Correction factors applicable to LD-3/3 Type of discharge vertical horizontal Flow rate control damper open closed open closed L=0 x x 2,37 x 0,84 x 2,24 L=000 x x 8,52 x 0,56 x 7,59 L=0 x x 4, x 0,32 x 2,86 L=00 x x,82 x 0,8 x 8,29 Correction factors applicable to LD-3/4 Type of discharge vertical horizontal Flow rate control damper open closed open closed L=0 x x 3,08 x 0,70 x 2,9 L=000 x x,07 x 0,47 x 9,87 L=0 x x 8,85 x 0,27 x 6,72 L=00 x x 27,07 x 0,5 x 23,78 Example: Q = 300 m 3 /h L = 000 mm Δp t = 5 Pa (vertical; damper opened) Δp t = 5 x 8,52 = 27,8 Pa (vertical; damper closed) Δp t = 5 x 0,56 = 28,4 Pa (horizontal; damper opened) Δp t = 5 x 7,59 = 3,8 Pa (horizontal; damper closed) L WA = 29 db(a) Example: Q = 300 m 3 /h L = 0 mm Δp t = 35 Pa (vertical; damper opened) Δp t = 35 x 3,08 = 07,8 Pa (vertical; damper closed) Δp t = 35 x 0,70 = 024,5 Pa (horizontal; damper opened) Δp t = 35 x 2,9 = 0,8 Pa (horizontal; damper closed) L WA = 33 db(a) 72

15 SLOT DIFFUSERS LD-3, LD-4 TECHNICAL DATA Sound power level and pressure drop: t t p (Pa) LD 4/ 5 L wa (db(a) ) Q (m 3 /h) p (Pa) LD 4/2 LwA (db(a) ) Q (m 3 /h) Correction factors applicable to LD-4/ Type of discharge vertical horizontal Flow rate control damper open closed open closed L=0 x x,8 x 0,76 x,3 L=000 x x 3,83 x 0,42 x 3,23 L=0 x x 5,80 x 0,28 x 5, L=00 x x 7,87 x 0,9 x 7,07 Correction factors applicable to LD-4/2 Type of discharge vertical horizontal Flow rate control damper open closed open closed L=0 x x 2, x 0,53 x,59 L=000 x x 8,84 x 0,29 x 7,96 L=0 x x 5,36 x 0, x 4,4 L=00 x x 22,32 x 0,4 x,70 Example: Q = 300 m 3 /h L = 000 mm Δp t = 33 Pa (vertical; damper opened) Δp t = 33 x 3,83 = 26,4 Pa (vertical; damper closed) Δp t = 33 x 0,42 = 4,0 Pa (horizontal; damper opened) Δp t = 33 x 3,23 = 07,0 Pa (horizontal; damper closed) L WA = 38 db(a) Example: Q = 300 m 3 /h L = 0 mm Δp t = 47 Pa (vertical; damper opened) Δp t = 47 x 2, = 99,2 Pa (vertical; damper closed) Δp t = 47 x 0,53 = 24,9 Pa (horizontal; damper opened) Δp t = 47 x,59 = 74,7 Pa (horizontal; damper closed) L WA = 36 db(a) 73

16 t t SLOT DIFFUSERS LD-3, LD-4 TECHNICAL DATA Sound power level and pressure drop: LD 4/3 LD 4/ p (Pa) LwA (db(a) ) Q (m 3 /h) p (Pa) 00 LwA (db(a) ) Q (m 3 /h) Correction factors applicable to LD-4/3 Type of discharge vertical horizontal Flow rate control damper open closed open closed L=0 x x 2,4 x 0,33 x,87 L=000 x x 3,86 x 0,9 x 2,69 L=0 x x 24,92 x 0,6 x 23,7 L=00 x x 36,76 x 0,3 x 3,33 Correction factors applicable to LD-4/4 Type of discharge vertical horizontal Flow rate control damper open closed open closed L=0 x x 3,4 x 0,28 x 2,43 L=000 x x 8,02 x 0,5 x 6, L=0 x x 32,34 x 0,3 x 28,2 L=00 x x 47,79 x 0,0 x 39,63 Example: Q = 600 m 3 /h L = 000 mm Δp t = 8 Pa (vertical; damper opened) Δp t = 8 x 3,86 = 249,5 Pa (vertical; damper closed) Δp t = 8 x 0,9 = 3,4 Pa (horizontal; damper opened) Δp t = 8 x 2,69 = 228,4 Pa (horizontal; damper closed) L WA = 38 db(a) Example: Q = 600 m 3 /h L = 0 mm Δp t = 70 Pa (vertical; damper opened) Δp t = 70 x 3,4 = 29,8 Pa (vertical; damper closed) Δp t = 70 x 0,28 = 9,6 Pa (horizontal; damper opened) Δp t = 70 x 2,43 = 70, Pa (horizontal; damper closed) L WA = 36 db(a) 74

17 SLOT DIFFUSERS LD-5 Slot diffuser LD-5 RAL Application: Slot diffuser LD-5 is designed to supply air in rooms with floor to ceiling heights from 2.5 to 4m. They are primarily designed for the supply of cold air in applications with high comfort demands CD Description: LD-5 slot diffuser is of a one-slot construction. The diffuser face plate consists of aluminium sections with built-in cylindrical deflectors made of recycled plastics. Individually adjustable deflectors allow continuous adjustment of discharge angle within the range, as well as adjustment of air flow rate. The diffuser air flow can be completely shut by means of the cylindrical deflectors. The plenum box is made of galvanised sheet steel. Component Parts: Plenum box 2 Inlet spigot 3 Main section 4 Cylindrical air deflector φ78 No. of spigots Standard lengths (L) 300, 400, 0, 600, , 900, , 0, 300, , 600, 700, , 00 Position of inlet spigots 4 3 The positions of inlet spigots are equal to those of LD-3 and LD-4 slot diffusers. See diagram and table on page Slot diffuser face plate designs Installation openings:5 x L (diffuser length) 5 Slot diffuser face plates are made of linear or angular ended sections, which allow the diffusers to be joined at different angles. Angular ended sections are not fitted with air direction controls. Cylindrical air deflectors Cylindrical deflectors are the most important components of a slot diffuser. They allow free adjustment of the air flow rate. Joining slot diffusers together in length Sections can be joint together by means of connecting plates. Total length of so joint sections is not limited. 75

18 SLOT DIFFUSERS LD-5 Fixing of the plenum box onto a LD-5 slot diffuser: with self-tapping screws (designation U) with spring clamps (designation S) Fixing of the diffuser to the plenum box with self-tapping screws (U) Fixing of the diffuser to the plenum box with a spring clamps (S) Installation methods: Installation with suspension brackets on the plenum box (designation P) Instalaltion with suspension brackets on the main section (designation R) Installation with suspension brackets on the plenum box (P) Installations with suspension bracket on the main section (R) Ordering key: LD-5/B/K/M/S/P/I L=0 I5 I9 I9 P R Length L=300, 400, 0, , 00 (single piece) Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box. Sound and thermal insulation (from -40 o C to 05 o C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material). Sound and thermal insulation (from -40 o C to 05 o C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material). Installation of the diffuser with suspension brackets on the plenum box Installation with suspension brackets on the main section Please specify the deflector colour in your order. Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order. When installing in cooling ceilings, consult the manufacturer. Versions with insulation on the inside of the plenum box are also available. S U M K B W Fixing of the diffuser to the plenum box with a spring clamp Fixing of the diffuser to the plenum box with self-tapping screws Volume control damper Plenum box Black deflectors White deflectors 76

19 SLOT DIFFUSERS LD-5 TECHNICAL DATA Fast selection diagram: L=00 Technical data: Free surface, per m of length: A ef = m 2. Air flow rate per m of length: Q=-70 m 3 /hm. L=0 L=000 L WA <35 db(a) L= Q (m 3 /h) L WA db(a) 2 Air velocity diagrams, at different throw distances: One or two sided horizontal discharge: H (m) LD-5 / LD-5 / V H (m/s) V (m/s) L A (m) L (m) Alternate sided horizontal discharge: H (m) LD-5 / LD-5 / V H (m/s) V (m/s) L A (m) L (m) 77

20 t SLOT DIFFUSERS LD-5 TECHNICAL DATA Sound power level and pressure drop p (Pa) Lwa (db(a)) Q (m 3 /h) α=0 α=45 α=90 Q (m 3 /h) L=0 Data in the diagram L=000 Data in the diagram L=0 Data in the diagram L=00 Data in the diagram ΔP t correction (in Pa) in cases of vertical discharge α = 0 Control damper in the inlet spigot is fully opened α = 45 Control damper in the inlet spigot is half opened α = 90 Control damper in the inlet spigot is fully closed α α=0 α=45 α=90 Q (m 3 /h) L=0 Data in the diagram L=000 Data in the diagram L=0 Data in the diagram L=00 Data in the diagram ΔP t correction (in Pa) in cases of inclined discharge α = 0 Control damper in the inlet spigot is fully opened α = 45 Control damper in the inlet spigot is half opened α = 90 Control damper in the inlet spigot is fully closed α 78

21 FLOOR SLOT DIFFUSERS LD-6N RAL 900 Floor Slot Diffusers LD-6N Application: LD-6N floor slot diffusers are a suitable solution for swimming pools and similar rooms with large glass surfaces and windows. They are designed for installation in the floor. Warm air is supplied in the upwards direction, towards the window. With appropriate dimensions, proper air supply is guaranteed, free of excessive draught or noise (L WA <35 db(a)). Description: LD-6N slot diffusers are designed in, 2, 3, 4, 5 and 6 slot versions. They are made of fixed aluminium sections and an aluminium structural frame. The diffusers are available in single piece lengths 0 mm to 00 mm. Painting according to the customer s specification is available on order. Advantages: no glass misting optimal ventilation no heat losses low pressure drop prevents the descent of cold air along windows does not cause heating of air near the windows even in the sunshine easy installation Versions: single slot LD-6N/ 8.5 two slots LD-6N/2 three slots LD-6N/ four slots LD-6N/4 five slots LD-6N/5 six slots LD-6N/

22 FLOOR SLOT DIFFUSERS LD-6N INSTALLATION Installation method: max 0.2 m 2 glass 2 LD 6N slot diffuser 3 air supply channel 3 Fast selection diagram: L wa < 35 db(a); V ef =2,5 m/s; Δp t = 80 Pa/m 25 LD-6 N / v ef L D -6 N/2 L D -6 N/3 L D -6N /4 L D -6N /5 Example The available floor area next to the glass surface is 5 m in length. The calculated supplied air flow rate is 4000 m 3 /h. From the diagram, the type: LD-6N/3 L=5m is selected. L D -6N/6 5 L (m) 0 Ordering key: Q (m 3 /h) LD-6N / / L / n number of longitudinal sections (pieces) Q (m 3 /h) L WA (db(a)) Δp t (Pa) L (m) v ef (m/s) Air flow rate Sound power level Pressure drop Slot diffuser length Effective air velocity Single piece length (L = 0, 300,...00) LD-6N Number of slots Floor slot diffuser Standard colour is RAL

23 PANEL DESIGN SLOT DIFFUSERS LDP-3, 4 St RAL Panel design slot diffusers LDP-3, LDP-4 Application: Panel design slot diffusers are designed for the supply of air in rooms with floor to ceiling heights from 2.4 m to 4 m. They are suitable for supplying either cold or warm air. A Description: LDP-3 and LDP-4 consists of a diffuser face plate and a plenum box. The diffuser face plate is commonly made of sheet steel and its design can be suited to the customer s requirements. Longitudinal guides, fitting tight to the sheet steel, are inserted in the diffuser face plate. Cylindrical deflectors, made of recycled plastics (ABS-antistatic) are installed in the guides, to allow free adjustment of both air jet discharge direction and flow rate. The number of slots per unit depends on the size of the unit. Diffuser face plate is powder painted in a RAL 900 scale colour, or, on special orders, in other colours. The deflectors, equal to those of LD-3 or LD-4 slot diffusers, are white or black as standard. The plenum box is made of galvanised sheet steel. It is fitted with a flow rate control damper, designed for fine air flow rate adjustment. 3 Types: LDP-3 m = 2 mm LDP-4 m = 22 mm H φ D Component parts: Plenum box 2 Volume control damper 3 Inlet spigot 4 Cross member 5 Diffuser face plate 6 Guide 7 Air deflector 8 Spring clamp 5 C Dimensions: LDP-3 LDP-4 Size C3 Slot length A φ D H No. of slots h No. of slots h

24 PANEL DESIGN SLOT DIFFUSERS LDP-3, 4 Special orders: On special order, we can deliver diffuser face plates of any design. The shape and dimensions are specified in agreement with the designer or customer. Technical data: Tecnical data are determined upon the definition of the shape, design, number of discharge slots and other factors. Fast flow rate determination (at L WA < 35 db(a)): LPD-3: flow rate per meter length 00m 3 /h LPD-4: flow rate per meter length m 3 /h Ordering key: LDP-3/B/K/M/I Size 400 I5 I9 I9 M Size (400, 0, 600, 625) Thermal insulation (polyethylene), 5 mm thick, on the outside of the plenum box. sound and thermal insulation (from -40 o C to 05 o C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material). sound and thermal insulation (from -40 o C to 05 o C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material). Volume control damper K Plenum box B W LDP-3 LDP-4 Black deflectors White deflectors Please specify the deflector colour in your order. Versions with insulation on the inside of the plenum box are also available. 82

25 ROUND DUCT DIFFUSER SKD-3 St RAL 900 Round Duct Diffuser SKD-3 Application: Round duct diffusers SKD-3 are designed for supplying air to the rooms with large floor to ceiling heights, e.g. conference halls, gyms, industrial halls etc. They can be installed at any location within the duct network, which renders them suitable for supplying of either hot or cold air. The T register model is designed to control the supply air flow-rate at the individual diffuser level. The T register design is recommended for installations with several round duct diffusers in one line. In such cases, the flow-rates of the diffusers near the line beginning should be slightly reduced, in order to supply adequate amounts of air to the diffusers farther along the line. Description: The duct diffuser consists of galvanised round cross-section tubes with inserted longitudinal guides, fitting tight into the tubes. Cylindrical deflectors made of recycled plastics are inserted into the guides, to allow continuous adjustment of discharged air direction within the 360 o range. Diffusers are available with different number of slots. The tube is painted in a RAL 900 scale colour, or, on special orders, in other colours. The deflectors, equal to those of LD-3 slot diffusers, are white or black as standard. A T register, black in colour, is inserted in the SKD-3D/T. The T register is adjusted by means of a PVC knob, screwed onto a threaded bar. 3 2 Dimensions: φd/no.of Slots Slots Slots Slots Slots Slots Slots Slots Components:. SKD-3D 2. T-register 3. T-register adjusting knob L D L L V / X X X 800 Diffuser structure for lengths exceeding 000 mm: A D φ 60 L v 60 L Note: φ D is the diffuser internal diameter. 60 Lv L 5 Ld Lv L 60 83

26 ROUND DUCT DIFFUSER SKD-3 Accessories: End cover Ød Joining piece Ød Note: φd is the external diameter φd 40 7 Elbow 90 0 Ød L r 7 40 Size d L,r Installation of SKD-3/D: SKD-3/D Joining piece Tube Joining piece SKD-3/D L 87 L 87 L 60 SKD-3/R SKD-3/R is constructed for installations into round ducts with square openings. H L L v H No. of ød of tube Installation openings slots L-35 H L v L Installation of SKD-3/R: 84

27 ROUND DUCT DIFFUSER SKD-3 TECHNICAL DATA Ordering key for SKD-3D: Ordering key for SKD-3R: SKD-3D /B /T /φ 355 /2 L=000 mm SKD-3R /B /T /φ355 /2 L=680 mm, H= mm length B W number of slots tube diameter T-register Black deflectors White deflectors tube length number of slots tube diameter T-register B Black deflectors W White deflectors R diffuser designed for installation into round ducts Please specify the deflector colour in your order. Example accessory specification: Accessory: Elbow 90 0 Colour: RAL 900 Quantity: piece 85

28 ROUND DUCT DIFFUSER SKD-3 TECHNICAL DATA Pressure drop determination diagram Fast selection diagram L WA < 35 db(a) Number of slots Example Air flow rate: Q=2 m 3 /h Nominal size: 4 mm Appropriate number of slots is: 4 φ - φ2 φ280 - φ355 Nominal φ Air velocity in the duct v(m/s) ΔP t (Pa) Q (m 3 /h) Nominal size φ mm φ400 - φ4 φ0 - φ Air flow rate (m 3 /hm) 86

29 ROUND DUCT DIFFUSER SKD-3 TECHNICAL DATA Pressure drop determination diagram v...air velocity in the duct Example Nominal size: φ 0 mm Number of slots: 6 Air velocity in the duct: 4 m/s Flow rate through SKD: Q=4 m 3 /h Pressure drop: 5,5 Pa Example 2 Max. pressure drop: 30 Pa Air velocity in the duct: 6 m/s Flow rate through SKD: Q=400 m 3 /h Unit to be chosen: SKD-3 φ ; n=8 Pressure drop: 27 Pa; L WA <35dB(A) 87

30 The right for technical changes reserved. 88

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