2/1/EN/3. Slot Diffuser. Type VSD15. with 15 mm wide diffuser face

Transcription

1 2/1/EN/3 Slot Diffuser Type VSD15 with 15 mm wide diffuser face

2 Contents Air Diffuser Discharge Characteristics (horizontal) 2 Description 3 Air Diffuser Discharge Characteristics (alternating) 3 Construction Dimensions 4 Materials 4 Installation of Dummy Sections 5 Installation Assembly 6 Nomenclature 8 Acoustic Data 8 Spectral Data 8 Aerodynamic Data 9 Order Details 12 Air discharge horizontal, right Air discharge horizontal, left 2

3 Description The type VSD15 slot diffuser is ideal for use where suspended ceiling panels leae narrow gaps just 16 mm wide. As air diffusers should be inisible with this type of ceiling design, the slot diffusers are supplied as standard in black (RAL 9005). An anodised finish is required on VSD15, construction Z0 can be supplied natural anodised to E6-C-0. The type VSD15 can be used in rooms with heights from approx m to 4.00 m. These diffusers are characterised by high induction, which results in rapid decay of supply air elocity and temperature differential. The recommended olume flow range is 8 to 25 l/s/m with a supply air temperature difference of up to ± 10 K. Because of their stable discharge characteristics, slot diffusers are suitable for use in systems with constant or ariable olume air flows. The direction of air discharge can be adapted to the room conditions required. The air control blades are set as specified on the order. If the discharge direction has to be subsequently changed, this can easily be done by rotating the air control blades on site. Air discharge alternating, angled Air discharge alternating, horizontal

4 Construction Dimensions Materials Construction Dimensions The diffuser is supplied with the rear-mounted plenum box, which, if required, can be fitted with internal acoustic lining. The plenum has circular side entry spigot into which can, if required, be fitted olume control damper which can be adjusted from the diffuser face. When used in continuous linear format dummy sections can be fitted between or at the end of actie sections (see page 5). The integral border, Z0, can be supplied for constructions A, F and D ersions. Dummy sections are not aailable in Z0. Materials The diffuser face consists of aluminium extruded section. The isible surfaces of VSD15 are black (RAL 9005), powder coated. Visible surfaces of VSD15-Z0 natural anodised (E6-C-0). The plenum box is of galanised sheet steel. Lining of mineral wool L VSD15-A-M 40 VSD15-A-M-Z0 L Length L 1 (mm) End angle only for construction Z0 14 L 1 L 1 58 Without end angle End angle right 15 VSD15-D-M 40 VSD15-D-M-Z0 End angle left End angle both ends 4

5 Installation of Dummy Sections Fig. 1 Two special air control blades are pushed in to the ends of the dummy section. The assembled unit is then pressed from below into the slot diffusers which are already suspended in position. For lengths L 1 > 1000 mm, a central installation subframe must also be fitted (see Fig. 3). Fig. 2 If a dummy section terminates at a wall on one side, a bracket fixing such as that shown must be proided by the customer. The other side can be mounted as shown in Fig. 1. Fig. 3 Separate mounting of dummy sections by installation subframes. The screw is supplied and its head is pushed into the dummy section, and the entire unit suspended and aligned with the installation subframes. Up to length L 1 = 1500 mm, two installation subframes are required. Fig. 1 Slot Diffuser Dummy Section Special air control blade Fig. 2 supplied by others Dummy section Fig. 3 Installation subframe (30 mm wide) Ceiling panels supplied by others

6 Installation Assembly Fig. 4 Slot diffusers of type VSD15 are also suitable for mounting onto the sides of light troffers. The method of fixing and components required must be agreed. All necessary proisions/components will then be supplied by Trox, i.e. inserts, clamping angles etc. Fig. 4 shows an example with clamping angle and threaded insert. Fig. 5 Standard installation of slot diffusers using 4 suspension brackets fitted to the plenum box. Suitable installation and fixing accessories supplied by others. Fig. 6 When slot diffusers are to be installed in panelled ceilings with external radius R 10 mm, they can be mounted up to 7 mm aboe the ceiling line. If the ceiling panels are rectangular howeer, the profile edge of the slot diffuser must lie flush with the ceiling line, i.e. the air control blade projects approx. 1 mm. Fig. 7 When slot diffusers are installed in plaster board ceilings the diffuser can be supplied with integral border Z0 for coering the cut opening. Fig. 4 Fig. 6 max. 7 Light R 10 min. 1 Threaded insert Clamping angle Fig. 7 Fig. 5 6

7 Installation Assembly Fig. 8 When slot diffusers are fitted in a linear format, connecting pins are used to align the front face. The connecting pins (2 per section) are first inserted into one section and then pushed halfway into the other section. Fig. 9 For an airtight seal on the first and last diffuser in a linear format, an end seal must be fitted. This can be installed in the factory or on site by others. When diffusers are installed as single units, a seal at both ends must be used. The end seal is not aailable for type Z0. Fig. 10 The air flow rate can be adjusted from the diffuser face. The air control blade under the spigot should be rotated until the damper can be adjusted by a screwdrier or rod (max. 3.5 mm, approx. 100 mm long). The control blade can then be reset. Fig. 8 Fig Connecting pin 2 Flat bar max. 1.5 mm thickness Fig End seal (tube) 2 Intermediate seal 7

8 Nomenclature Acoustic Data Spectral Data Nomenclature V. in l/s m: Volume flow per unit length V. in m 3 /h m: Volume flow per unit length V. t in l/s: Total olume flow V. t in m 3 /h: Total olume flow A in m: Spacing between two diffusers H 1 in m: Distance between ceiling and occupied zone H 1 max in m: Max. penetration depth when heating L in m: Distance from diffuser L = A/2 + H 1 or L = X + H 1 H1 in m/s: Time aerage air elocity between two diffusers at distance H 1 from the ceiling L in m/s: Time aerage air elocity at the wall at distance L eff in m/s: Effectie jet elocity in m: Effectie width of slot s eff t Z t L in K: Temperature difference between supply air and room air in K: Difference between core temperature and room temperature at distance L p t in Pa: Total pressure drop L WA in db(a): A-weighted sound power leel L WNC : NC rating of sound power leel L WNR : L WNR = L WNC +3 L pa, L pnc : A-weighting and NC rating of room sound pressure leel L pa L WA 8 db L pnc L WNC 8 db L in db/oct.: Relatie sound power leel with respect to L WA L W in db/oct.: Octae band sound power leel of regenerated noise L W = L WA + L in : Damper angle 1 Sound power leel and pressure drop (supply air) Pressure drop p t in Pa V. t Relatie Spectra L for damper angle = 0 Length L WNC Effectie jet elocity Length L WA in db(a) l/s m 3 /h Correction to Diagram 1: Air control damper Correction to Diagram 1: Extract air Octae Band Centre Frequency Hz Damper angle L 1 = 600 p t x 1.0 x 1.15 x 1.3 L 1 = 1000 p t x 1.0 x 1.15 x 1.7 L 1 = 1500 p t x 1.0 x 1.25 x 2.0 L 1 L WA p t x x x 0.41 mm eff m/s For calculation of eff see page 9. 8

9 Aerodynamic Data Air discharge: horizontal one direction Example Data gien: VSD15 Slot length Total olume flow L 1 = 1000 mm V. t = 15 l/s Required: Octae band sound power leel for regenerated noise L W Octae band centre frequency in Hz L WA in db(a) L in db L W in db Diagram 1: L WA = db(a) p t = 18 Pa Sound power leel and pressure drop Effectie jet elocity eff : V. t 15 eff = = = 3.75 m/s s eff L Effectie width of slot Air discharge horizontal angled s eff in m Air elocity between two diffusers and at the wall H 1 = m Diffuser Layout A L X l/s m (m 3 /h m) V. = 20 (72) 0.80 L H1 in m/s (36) 8 (29) 15 (54) L in m/s H 1 t L L H1 t L m Spacing A or Distance L 3 Temperature Quotient 0.30 Effectie jet elocity Temperature Quotient t L / t Z V. t in l/s V. t t eff = = [m/s] s eff L V. t in m 3 /h V. t t eff = = [m/s] s eff L s eff L 1 = m = length of slot diffuser in m m Distance L 9

10 Aerodynamic Data Air discharge: alternating, horizontal Example Data gien: VSD15; air discharge horizontal, alternating Slot length Volume flow per unit length Supply air temperature differential horizontal for cooling Spacing between diffusers Distance between ceiling and occupied zone Distance between diffuser centre line and wall L 1 = 1000 mm. V = 15 l/s m t Z = 10 K A = 2.0 m H 1 = 1.0 m X = 2.4 m Diagram 4: H1 = 0.12 m/s Diagram 5: L = A/2 + H 1 = = 2.0 m t L / t Z = 0.09 t L = 0.09 ( 10) = 0.9 K Diagram 6: L = X + H 1 = = 3.4 m L = 0.21 m/s Air elocity between the two diffusers Temperature Quotient Air elocity at the wall Diagram 1: Sound power leel and pressure drop L WA = db(a) (L WNC = 18 NC) p t = 18 Pa 4 Air elocity between two diffusers H 1 = m Diffuser Layout A L X 0.25 l/s m (m 3 /h m) V. = 20 (72) L (54) H 1 H1 in m/s (36) 8 (29) H1 t L L t L m Spacing A 5 Temperature Quotient 6 Air elocity at wall l/s m (m 3 /h m) V. = 20 (72) Temperature Quotient t L / t Z L in m/s (36) 8 (29) 15 (54) m Distance L m Distance L 10

11 Aerodynamic Data Air discharge: alternating, angled Example Data gien: VSD15; air discharge alternating, angled Slot length Volume flow per unit length Supply air temperature differential Spacing between diffusers Distance between ceiling and occupied zone L 1 = 1000 mm. V = 15 l/s m t Z = 8 K or + 8 K A = 2.4 m H 1 =1.2 m Diagram 7: H1 = 0.19 m/s Air elocity between the two diffusers Diagram 8: Temperature quotient for cooling t H1 / t Z = t H1 = ( 8) = K for heating t z = + 8 K Diagram 1: Sound power leel and pressure drop L WA = db(a) (L WNC = 18 NC) p t = 18 Pa Diagram 9: H 1max 1.3 m Maximal penetration depth when heating 7 Air elocity H 1 = m Diffuser Layout 0.40 l/s m (m 3 /h m) V. = 20 (72) A (54) H 1 H 1max H1 in m/s (36) 8 (29) 100 H1 t H m Spacing A 8 Temperature quotient when cooling 9 Max. penetration depth when heating K Temperature Quotient t H1 / t Z H 1max in m t Z = + 8 K + 12 K m Distance H 1 V l/s m m 3 /h m

12 Order Details Specification Text Adjustable slot diffusers with face width of 15 mm, suitable for installation in between ceiling panels. Consists of diffuser face with air control blades to proide adjustable discharge direction. Blades are factory set but are adjustable on site by others. Aailable with integral border type Z0. Complete with a rear mounted plenum box fitted with circular side entry spigot and four suspension brackets. Optionally, with 20 mm thick internal lining with glass fibre scrim coering and/or olume control damper adjustable from diffuser face. Dummy sections aailable for VSD15 without Z0. Materials: VSD15 diffuser face in extruded aluminium section, isible surface type powder coated black (RAL 9005), or anodised to European Standard E6-C-0 to C-35. VSD15 Z0 diffuser face in of extruded aluminium section. Visible surface natural anodised to E6-C-0 or to European Standard E6-C-31 to C-35. Air control blades in ABS (flame retardant), self extinguishing tested to UL for lack of molten droplets. Black as standard, white if required (similar to RAL 9010). Rear plenum box of galanised sheet steel, mineral wool lining. Order Code VSD15 - A - M - Z0 / 900 / A9 / Need not be completed for standard products 0 / P1 / RAL 9016 / WS Plenum box Plenum box with lining Dummy section 2) Face Section Volume control damper M 1) Integral border Z0 c u b A D B F c u b L 1 (mm) c u b State colour 1) HL Horizontal left HR Horizontal right WH Alternating Horizontal (standard construction) WS Alternating angled 0 standard finish VSD15 black RAL 9005 VSD15-Z0 E6-C-0 P1 Powder coated to RAL S2 Anodised to European Standard E6-C-0 to C-35 (VSD15-Z0 only E6-C-31 to C-35) Design changes resered All rights resered Gebrüder Trox GmbH (08/2000) Accessories SE Special air control blades MT Installation sub frame 1) Not aailable for type VSD15-B! Please order accessories SE and MT separately. 2) Dummy sections not aailable for Z0 construction. 3) End angle only for Z0 construction. Order code for end angle-pairs supplied loose please order separately End angle VSD15-Z0-EW Accessories: Special air control blades for mounting dummy sections on slot diffusers. Installation subframe for suspending dummy sections. 1) b c u 0 Not used Note! Black air control blades standard. If required state Air control blades white (similar RAL 9010). Does not apply to VSD15-B. 0 Without end seals A9 End seal both ends c B9 End seal right end u Looking at plenum spigot C9 End seal left end b See table for end angle mounting 3) End angle mounting For both construction right left ends Z0 AA BA CA Order Example Make: TROX Type: VSD15 -A- M / 900 / A9 / 0 / P1 / RAL 9016 / WS Air control blades white Accessories: SE/MT 12