Swirl Diffusers Series DLA - Opticlim .Swirl diffusers series DLA ... Recommended installation...

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  • The Innovation Company

    LTG Aktiengesellschaft

    Technical Documentation

    Swirl DiffusersSeries DLA

    Example:Type DLA 9withrectangular box

    LTG AktiengesellschaftD - 70435 Stuttgart, Grenzstrae 7 +49 (711) 82 01-0, Fax +49 (711) 82 01-720Internet: www.LTG-AG.deE-Mail: info@LTG-AG.de

    LTG Incorporated105 Corporate Drive, Suite ESpartanburg S.C., 29303 USA +1 (864) 599-6340, Fax +1 (864) 599-6344Internet: www.LTG-INC.netE-Mail: info@LTG-INC.net

    LTG S.r.l. con socio unicoVia G. Leopardi 10I-20066 Melzo +39 (02) 9 55 05 35, Fax +39 (02) 9 55 08 28Internet: www.LTG-SRL.comE-Mail:ltg@ltgsrl.191.it

    DLA-eng-TP (08/10) 419-172

  • The Innovation Company

    LTG Aktiengesellschaft

    E LTG Aktiengesellschaft Grenzstrae 7 D-70435 Stuttgart +49 (711) 8201-0 Fax -720 DLA-eng-TP (08/10)Internet: www.LTG-AG.de E-Mail: raumluft@LTG-AG.dePrinted in Germany Former editions are invalid Subject to technical modifications page 2 of 20

    Swirl diffusers series DLA

    Content Page

    Application, installation/positioning,functionality, flow types, advantages 3

    Product overview 4

    Type DLA 7 5

    Type DLA 8 6

    Type DLA 9 7

    Dimensions air distribution boxes 8

    Selection diagrams type DLA 7 11

    Selection diagrams type DLA 8 16

    Selection diagrams type DLA 9 18

    Installation 19

    Nomenclature 20

    NotesDimensions stated in this brochure are in mm.

    Dimensions stated in this brochure are subject to GeneralTolerances according to DIN ISO 2768-vL.

    Straightness and twist tolerances for extruded aluminumprofiles according to DIN EN 12020-2.

    You will find the actual tender documentations at the endof this document.They are available in word format at your local dealershipor at www.LTG-AG.de.

  • The Innovation Company

    LTG Aktiengesellschaft

    E LTG Aktiengesellschaft Grenzstrae 7 D-70435 Stuttgart +49 (711) 8201-0 Fax -720 DLA-eng-TP (08/10)Internet: www.LTG-AG.de E-Mail: raumluft@LTG-AG.dePrinted in Germany Former editions are invalid Subject to technical modifications page 3 of 20

    Swirl diffusers series DLA

    ApplicationDirect ventilation of occupied zones in commercial and in-dustrial facilities which require high air exchange rates be-cause of thermal loads, e.g. restaurants, shopping centers,laboratories.

    Installation/PositioningIntegration in the ceiling or free suspension.Recommended installation height: 2.5 ... 5 meters.

    FunctionalityThe highly inductive, fanned rotational flow makes it pos-sible to handle high cooling loads and still maintain comfort-able air conditions in the occupied zones.

    As the aerodynamic swirl disc is easily adjustable the pat-terns can be set to suit varying room conditions, even afterinstallation.

    Thanks to the highly inductive effect as a result of the largenumber of individual air jets, the diffuser is suitable for bothhigh flow rates and variable flow rate systems with low flowrates.

    Flow typesThe swirl disc can be set for two flow types:- tangential flow (basic version)- vertical flow.

    With tangential flow, the air jets will attach strongly to theceiling resulting in a fully mixed turbulent flow structure inthe room, with rapid temperature and velocity decay of thejet.

    With vertical flow, the air is projected conically downwards.The vertical flow is used preferably in the heating modeand in high rooms.

    Example for the installation of a swirl diffuser type DLA 7

    Advantages Highly inductive air diffuser with swirl characteristics.

    High comfort due to low air speeds and temperature dif-ferences in the occupied zone.

    Economical installation, thanks to- central fixing (up to size 625)- factory-set swirl disc, pattern may be modified at any

    time to meet new room conditions.

    Easy flow rate regulation thanks to integrated throttlevalves as standard.

    Wide range of different design features.

    All metal construction- smooth surface- easy cleaning

    With rectangular, pyramid or cylindrical plenum boxavailable.

    Connection box may be used in combination with avariety of LTG swirl diffusers.

  • The Innovation Company

    LTG Aktiengesellschaft

    E LTG Aktiengesellschaft Grenzstrae 7 D-70435 Stuttgart +49 (711) 8201-0 Fax -720 DLA-eng-TP (08/10)Internet: www.LTG-AG.de E-Mail: raumluft@LTG-AG.dePrinted in Germany Former editions are invalid Subject to technical modifications page 4 of 20

    Swirl diffusers series DLA

    Product overview

    DLA 7 DLA 8 DLA 9Primarily for use inconvenience areas

    (e.g. offices, meeting rooms)

    Primarily for use in conveni-ence areas with high flow rates(e. g. conference rooms, halls)

    Primarily for use in areas requir-ing high air exchange rates dueto thermal load (e. g. shopping

    centers, restaurants, labs)

    Flow rate [m/h] 100 to 900 500 to 1000 400 to 1000Flow typeTangential All models All models All models

    Vertical All model All model Only models 600, 625

    Model [mm]Square 400 500 600 625 800 --- --- 600 625 --- 400 500 600 625 ---

    Round 400 500 600 625 800 --- --- 600 625 --- 400 500 600 625 ---

    Diffuser plate

    Design Basic version: visible side powder coated to RAL referenceSpecial version (e. g. anodized, chrome-plated, stainless steel) on request

    Swirl discDesign Basic version: coated in black or white

    Special version (e. g. anodized, chrome-plated, stainless steel) on request

    Air supply boxForm Rectangular box, pyramid box, cylindrical box

    Material Galvanized sheet steel

    Flow restrictor At round connection with adjustable flow restrictor,adjustment from below through the diffuser plate.

    Duct connectionLateral Round spigot. For small box heights a side entry rectangular connection is available.

    From above Round spigot

  • The Innovation Company

    LTG Aktiengesellschaft

    E LTG Aktiengesellschaft Grenzstrae 7 D-70435 Stuttgart +49 (711) 8201-0 Fax -720 DLA-eng-TP (08/10)Internet: www.LTG-AG.de E-Mail: raumluft@LTG-AG.dePrinted in Germany Former editions are invalid Subject to technical modifications page 5 of 20

    Swirl diffusers type DLA 7

    Views of unit

    Type DLA 7 with rectangular box

    Type DLA 7 with pyramid box

    Flow types

    Tangential setting1 and 2

    Vertical setting

    Swirl disc

    Diffuser plate

    Swirl disc

    Diffuser plate

    The swirl disc can be set for two flow types : the tangentialflow 1 and 2, or vertical flow.

    With the tangential flow 1 (standard setting) the air jets willattach strongly to the ceiling resulting in a fully mixed turbu-lent flow structure in the room, with rapid temperature andvelocity decay of the jet.

    Tangential setting 2 is preferably used for lower flow ratesand large cooling differentials.The outlet cross-section is reduced, thus diffusing the airwith increased momentum, ensuring that the jet remainspowerfully attached to the ceiling. As a result, inductioneffect is increased.

    Flow development with tangential setting

    With the vertical setting, the air is projected conically down-wards. The vertical flow is used preferably in the heatingmode.

    Flow development with vertical setting

  • The Innovation Company

    LTG Aktiengesellschaft

    E LTG Aktiengesellschaft Grenzstrae 7 D-70435 Stuttgart +49 (711) 8201-0 Fax -720 DLA-eng-TP (08/10)Internet: www.LTG-AG.de E-Mail: raumluft@LTG-AG.dePrinted in Germany Former editions are invalid Subject to technical modifications page 6 of 20

    Swirl diffusers type DLA 8

    Views of unit

    Type DLA 8 with rectangular box

    Type DLA 8 with pyramid box

    Flow types

    Swirl disc

    Diffuser plate

    Swirl disc

    Diffuser plate

    Tangential flow

    Vertical flow

    The swirl disc can be set for two flow types: the tangentialflow or vertical flow.

    With the tangential flow (standard setting), the air jets willattach strongly to the ceiling resulting in a fully mixed turbu-lent flow structure in the room, with rapid temperature andvelocity decay of the jet.

    Flow development with tangential setting

    With the vertical flow, the air is projected conically down-wards. The vertical flow is used preferably in the heatingmode.

    Flow development with vertical setting

  • The Innovation Company

    LTG Aktiengesellschaft

    E LTG Aktiengesellschaft Grenzstrae 7 D-70435 Stuttgart +49 (711) 8201-0 Fax -720 DLA-eng-TP (08/10)Internet: www.LTG-AG.de E-Mail: raumluft@LTG-AG.dePrinted in Germany Former editions are invalid Subject to technical modifications page 7 of 20

    Swirl diffusers type DLA 9

    View of unit

    Type DLA 9 with rectangular box

    Flow types

    Tangential setting

    Vertical setting

    Swirl disc

    Diffuser plate

    Swirl disc

    Diffuser plate

    The swirl disc can be set for two flow types: the tangentialflow or vertical flow (vertical flow only for models 600/625).

    With the tangential flow (standard setting), the air jets willattach strongly to the ceiling resulting in a fully mixed turbu-lent flow structure in the room, with rapid temperature andvelocity decay of the jet.

    Flow development with tangential setting

    With the vertical setting, the air is projected conically down-wards. The vertical flow is used preferably in the heatingmode.

    Flow development with vertical setting(only models 600/625)

  • The Innovation Company

    LTG Aktiengesellschaft

    E LTG Aktiengesellschaft Grenzstrae 7 D-70435 Stuttgart +49 (711) 8201-0 Fax -720 DLA-eng-TP (08/10)Internet: www.LTG-AG.de E-Mail: raumluft@LTG-AG.dePrinted in Germany Former editions are invalid Subject to technical modifications page 8 o