A B. Linear cylinder diffuser LC. pag. A-52

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1 pag. A-5 Linear cylinder diffuser LC Description Linear rotating cylinder diffuser for ceiling or wall installation. Each slot houses inside a range of cylinders, that, by rotation, allow differents launch configurations. Compared to the traditional linear slot diffuser, it offers more flexibility and best performances. In fact, it s possible to guarantee comfortable environment s conditions (absence of air-flows) also in presence of high specific loads, due to the jet splitting (alternate throw), which allows a fast reduction of velocity. Characterized by pressure drops and limited noise levels, thanks to the big versatility, it s used both for cooling and for heating both for ceiling and for wall. To maintain the aesthetic uniformity, the LFR (LF) linear diffuser can be used for intake. Dimensions ominal length (L) : 000, 0, 000 mm* Slots number () :,,, 4 * Different lengths on request (by increments of 00 mm) Construction Extruded anodised aluminium (LC), extruded natural painted aluminium (LCW). Plastic material cylinders. Finish Anodised aluminium, with black cylinders (LC). Gloss white RAL 900, powder-coated polyester type, with white cylinders (LCW). Specifications Linear rotating cylinder diffuser for ceiling or wall installation. Ceiling diffusion with horizontal launch and alternate throw, with or without Coanda effect. Ceiling diffusion with vertical launch. Wall diffusion. Possibility to rotate cylinders in closing position, in order to partialize the jet. Anodised aluminium or white painted aluminium RAL 900 and plastic material (cylinders) construction. Accessories PLSA-LC: standard plenum type A PLSB-LC: standard plenum type B PLSC-LC: standard plenum type C PLIA-LC: insulated plenum* type A PLIB-LC: insulated plenum* type B PLIC-LC: insulated plenum type C CT-LC: counterframe for LC AGLC: angle piece for 90 element composition *internal polyurethane insulation thickness 6mm, cl. A* B* C** D** F*** H** (mm) (mm) (mm) (mm) (mm) (mm) 5/ 5/ 00/00 0/7 58 0/0 64/60 80/60 90/85 59/ /60 9/89 09/89 70/85 88/ /60 4 /8 8/8 70/85 7/4 48 0/0 * LC / LCSB ** type A / type B *** external diameter, single inlet for L = 000 mm, double inlet for L = 0 mm and L = 000 mm. C D 4 DP d L WA DP d L WA (Pa) (m) (db A ) ,7, , , ,6 9 00, ,9 00 0, , , ,5 0 5,5 45 air flow per meter (L = 000 mm) pressure drop distance from the wall ( = m) noise rating (rif. 0 - W) BF 4 A B Plenum type A H

2 Linear cylinder diffuser LC pag. A-5 Other versions LCSB: like LC but without lateral frame, for plasterboard installation. B-0 For wall installations it is used the plenum type C, with the wall hanging of the plenum or ceiling hanging and diffuser s fixing to the plenum through apposite screws, through slots. Schema di montaggio The basic mounting scheme provides the employment of plenum type A with hanging of the diffuser to the ceiling through specific brackets. These allow also the diffuserplenum junction (with gasket). The regulation damper can be controlled through a fine tool (for ex.: screwdriver). As alternative, by employment of plenum type B, it s possible to fix diffuser to plenum, working on special suspension screws, through rotating slots. C D A* B* E F*** G (mm) (mm) (mm) (mm) (mm) 5/ 5/ /60 80/ /89 09/ /8 8/ * LC / LCSB *** external diameter, single inlet for L = 000 mm, double inlet for L = 0 mm and L = 000 mm. E BF H BF G+5.5 G A B.5 Plenum type C A B Plenum type B

3 pag. A-54 Plenum Plenums are equipped with single inlet in case of L = 000 mm and with double inlet for L = 0 mm and for L = 000 mm. Other different executions are possible at request. Plenum type A Linear cylinder diffuser LC Plenum type B H H H (mm) (mm) (mm) * LC / LCSB H H H (mm) (mm) (mm) * LC / LCSB Adjustable damper from ambient (in photo PLSB-LC)

4 Linear cylinder diffuser LC pag. A-55 Plenum type C Diffusers composition (L > 000) H H H In case of L > 000 mm, the execution is made in more parts. The composition of two side by side LC is made through grooved pins and connection plates to be mounted where there are the fixing screws, which can be normally found at the end of the diffuser. 05/005* H H H 55/5* /005* 4 H H H (mm) (mm) (mm) * LC / LCSB Counterframe H H H CT-LC: counterframe for LC,for plasterboard false ceilings.5 mm thick; screw fixing. The composition foresees the use of 000 mm sectionsin the center and of elements of different lenght at the two ends, according to following rule (nominal lenght L): L=0 mm: L=000 mm: L=0 mm: L=00 mm: L=40 mm: L=00 mm: L=6000 mm: L=7000 mm: L=8000 mm: The composition of the plenums follow same rules of the diffusers. On request different compositions are possibile. In the case of composition of elements disposed at 90, shaped angles are available (AGLC) that allow a fast and nice connection. RA 44 B R9.5

5 pag. A-56 Launch configuration By adequate cylinder s positioning (which have asymmetric profile) into the slot and by using the proper reference marks, it s possible to obtain the following diffusion geometries: Linear cylinder diffuser LC ) Horizontal bilateral ceiling diffusion with alternate throw and without Coanda effect. ) Horizontal bilateral ceiling diffusion with alternate throw and Coanda effect (alternate tangent). It s the standard configuration. Cylinders are disposed so that the consecutive elements could generate opposite directions launches. This allows elementary stable jet splitting, with larger induction s surface, compared to the traditional linear slot diffusers, and then a faster reduction of velocity and temperature difference. The vein adhere to the ceiling and to the walls, in the conventionally occupied zone with a residual velocity that must be the plan s one. It s the alternative configuration to the ) when installation height or distance from walls don t allow its employment (inadequate residual velocity in the conventionally occupied volume). Cylinders are disposed so that the consecutive elements could generate wide apart launches without Coanda effect (angles between jets ). The elementary stable jets splitting, offers a larger induction s surface and then a faster reduction of velocity and temperature difference.

6 Linear cylinder diffuser LC pag. A-57 ) Vertical ceiling diffusion. 4) Alternate throw wall diffusion. It s the maximum vertical penetration configuration. Cylinders are disposed so that vertical elementary jets could form a single front. It represents the alternative solution to the traditionals wall grilles. Cylinders are disposed so that the consecutive elements could generate wide apart launches (angles between jets ). The elementary stable jets splitting, ensure a faster reduction of speed and temperature difference.

7 pag. A-58 It s otherwise possible to opt for mixed configurations, by adequated match of the previous cases and proper cylinder disposition. For example it s possible to orient a part of the jet to the ceiling and another part along the wall, however keeping alternate throw. Linear cylinder diffuser LC 5) Diffusion witnterruption fringes (closed cylinder). Sometimes it can be useful to rotate cylinders until complete slot closure: this option increases even more the diffuser s versatility. For example in case of vertical launch, when you want to increase the penetration through throw s velocity increment, or in case of unexpected obstacle, in correspondence of which, it becomes necessary to nullify the jet. Asymmetrical cylinder

8 Linear cylinder diffuser LC Performances: L=000, = (alternate tangent) pag. A L wa (db A ) Key to symbols d DP L WA Selection Installation height Distance from wall Air-flow per single diffuser Pressure drop Sound power level weighed A (rif. 0 - W) At the requested air-flow, according to diagram, determine slots number so that the sound power level L WA can t exceed the maximum allowed one for plan s value. At the requested air-flow, known, from point and known the installation height, from diagram, determine the minimum distance from wall d. At the requested air-flow, known, from point, verify from diagram that the pressure drop DP is in accordance with the plan s value. Correction factors In the case of diverging horizontal ceiling diffusion or alternating wall diffusion, consider a pressure drop increase equal to 70%. In the case of vertical exhaust, consider a pressure drop increase equal to 60%. ote The minimum distance from wall d has been determined so that the residual velocity in the occupied volume does not exceed 0,0 m/s. Velocity probes have been disposed at 0,6 m distance from wall, and at a height from floor corresponding to UI-E-ISO 776 norm. In the case project concerns diffusers disposed on parallel rows, it s recommended to consider d as minimum wheelbase. d (m) P (Pa) =4,0 m =,5 m =,0 m =,5 m

9 pag. A-60 Performances : L=000, = (alternate tangent) Linear cylinder diffuser LC Performances : L=000, = (alternate tangent) L wa (db A ) 5 L wa (db A ) =,5 m =,5 m 4 d (m) =,0 m d (m) =,0 m 0 =4,0 m =,5 m =4,0 m =,5 m P (Pa) 5 0 P (Pa)

10 Linear cylinder diffuser LC Performances : L=000, =4 (alternate tangent) L wa (db A ) 45 5 Air-flow calculation pag. A-6 For air-flow calculation must be employed hot-wire anemometers. The probe must be positioned as shown in the picture, in correspondence to cylinders middle line, orienting the window against the flow. Reference cylinders are: 5 and 6 for L = 000 mm, 4, 5,, for L = 0 mm, 5, 6, 5, 6 for L = 000 mm (result is the same counting from right or from left). In each point, the average velocity must be measured in a minimum breaktime of at least minute (average in time). In order to obtain the air-fow, calculate the arithmetic average of the so measured values (ṽ k ), and multiply it for value A k, carried in the table, which refers only to diffusion with alternate tangent throw A k (m ) = = = =4 L=000 mm 0,0095 0,05 0,04 0,05 L=0 mm 0,04 0,00 0,05 0,047 L=000 mm 0,090 0,006 0,0468 0, =,5 m = ṽ k x A k x d (m) 4 =,0 m =,5 m =4,0 m P (Pa)