DKS - Multi-nozzle Ceiling Diffuser. Halton DKS. Multi-nozzle Ceiling Diffuser

Transcription

1 Halton DKS Multi-nozzle Ceiling Diffuser Horizontal air supply, vertical air patterns also possible Supply air pattern can freely be directed in up to four directions or alternatively radially as swirl jet Directional nozzles with two-slot air path efficiently deflect the airstreams Supply air jet velocity is efficiently reduced due to high mixing effect Openable front panel enables cleaning of the diffuser and ductwork Size 600 adapted for installation in modular 600x600 mm suspended ceiling Accessories Balancing plenum with measurement and adjustment functions. MATERIAL AND FINISHING PART MATERIAL NOTE Frame Front panel Galvanised steel Steel Nozzle Polyacetal POM Colour alternatives White RAL 9010 Grey RAL 7040 Black Coupling sleeve Gasket Galvanised steel Rubber compound Finishing Painted White RAL 9010 Special colours available 1

2 QUICK SELECTION Pa qv l/s m 3 /h DKR (R4) LpA DPst DPtot Ld Lmin 1,0 1,4 2,4 3,6 L0.2 1,8 2,6 3,8 4,6 DKR (R4) LpA DPst DPtot Ld Lmin - 1,0 1,2 1,8 L0.2 1,6 2,2 2,6 3,2 DKR (R4) LpA DPst DPtot Ld 2,6 3,0 3,2 4,0 4,8 Lmin 1,4 2,2 3,0 4,6 6,4 L0.2 2,8 3,4 4,2 5,6 7,0 DKR (R4) LpA DPst DPtot Ld ,4 4,8 Lmin 1,0 1,2 2,2 3,4 4,4 L0.2 2,0 2,6 3,6 4,6 5,4 DKR (R4) LpA DPst DPtot Ld 3,0 3,6 4,2 4,6 5,0 Lmin 2,6 3,8 5,0 6,2 7,4 L0.2 4,0 5,0 6,0 7,0 8,0 DKR (R4) LpA DPst DPtot Ld 3,0 3,4 3,6 4,2 4,6 5,4 Lmin 2,0 3,0 4,2 5,2 6,2 8,2 L0.2 3,4 4,2 5,2 6,0 6,8 8,6 DKR (R4) LpA 21 28, DPst 7 11, DPtot 8 13, Ld 2,8 3,2 3,6 4,0 4,2 5,2 Lmin ,0 1,0 L0.2 4,4 5,4 6,0 7,0 8,0 10,0 DKR (R4) LpA DPst DPtot Ld 3,4 3,6 4,0 4,8 5,6 6,4 Lmin - - 1,0 1,0 1,2 1,8 L0.2 4,8 5,4 6,2 7,6 9,4 11,2 DKR (R4) LpA DPst DPtot Ld 2,8 3,0 3,4 4,0 4,8 Lmin 3,0 3,6 5,0 6,8 8,6 L0.2 4,2 4,8 6,0 7,4 9,0 LpA values presented with room attenuation 4 db (red 10m 2 - sab). When using room attenuation 8 db (red 25m 2 - sab): LpA - 4dB. Pa LpA DPst Supply air cooling capacity, W A-weighted sound pressure level, reduced by total equivalent absorption surface of 10m 2, db(a) red 10m 2 - sab Static pressure drop, Pa DPtot Ld Lmin Total pressure drop, Pa Distance from the supply unit, at which air jet detaches from ceiling, m Minimum distance between central lines of two supply units, m (V3 = 0,25m/s at 1.8m height) L0.2 Isotermal throw length, m when residual velocity of supply air jet 0,2 m/s Room temperature (Tr) = 24 C Supply air temperature (Ta) = 14 C Room height = 2,8 m 2

3 Function Air is supplied both horizontally and vertically into the space through the front panel of the diffuser. The supply air pattern can be directed radially in the direction(s) desired (1, 2, 3 and 4) by rotating the nozzles (model DKS/S). Horizontal swirl jet and vertical air patterns can also be achieved by adjusting the nozzles (model DKS/W). Direction of the supply air jet has no effect on the pressure drop or the airflow rate. The recommended maximum air temperature difference between supply and room air is 10 C. The maximum recommended temperature for plastic material is 60 C. ACCESSORIES ACCESSORY CODE DESCRIPTION Balancing plenum TRI For balancing & equalising the airflow and attenuating the duct noise DIMENSIONS NS W W1 H ØD W W1 ØD 63 H NS = Connection size - Diffuser size 3

4 The technical performance for the combination of supply air diffuser and TRI plenum is presented separately for the two different installations. See HIT Design software. Installation Nozzle settings The diffuser is connected either directly to the duct by screwing or riveting, or alternatively to the TRI balancing plenum. Direct the flow pattern in the desired directions by individually rotating each nozzle in order to meet the required specifications. A minimum safety distance upstream of the diffuser of 3xD is recommended. 300 x x x600 Installation with plenum TRI The collar of TRI plenum can be installed either internally in the plenum or externally on the bottom of the plenum. The height of the unit is presented in the table below for the external installation. When the collar is installed internally, the total height H1 is reduced by 60 mm. DKS (ØD) ØD1 TRI W2 H TRI TRI TRI TRI TRI TRI TRI TRI TRI ØD1 ØD 7 W2 4

5 Pressure drop, throw pattern and sound data DKS , DKS , swirl pattern DKS , DKS , swirl pattern DKS , DKS , swirl pattern DKS , DKS , DKS , swirl pattern Selection example : Requirements : qv = 105 l/s Selection : DKS/W LpA < 35 db(a) LpA < 34 db(a) L0,2 < 4,5 m L0,2 < 4,0 m Swirl pattern DPtot = 18 Pa Note: Recommended minimum supply temperature, 10 C below room. 5

6 Pressure drop, throw pattern and sound data DKS , DKS , 4-way pattern DKS , DKS , 4-way pattern DKS , DKS , 4-way pattern DKS , DKS , DKS , 4-way pattern Note: Recommended minimum supply temperature, 10 C below room. 6

7 Pressure drop, throw pattern and sound data DKS , DKS , 3-way pattern DKS , DKS , 3-way pattern DKS , DKS , 3-way pattern DKS , DKS , DKS , 3-way pattern Note: Recommended minimum supply temperature, 10 C below room. 7

8 Pressure drop, throw pattern and sound data DKS , DKS , 2-way pattern DKS , DKS , 2-way pattern DKS , DKS , 2-way pattern DKS , DKS , DKS , 2-way pattern Note: Recommended minimum supply temperature, 10 C below room. 8

9 Pressure drop, throw pattern and sound data DKS , DKS , 1-way pattern DKS , DKS , 1-way pattern DKS , DKS , 1-way pattern DKS , DKS , DKS , 1-way pattern Note: Recommended minimum supply temperature, 10 C below room. 9

10 SOUND LEVEL DATA DKS/S qv DPst DPtot F (Hz) LpA NR NC 1 to 4-way pattern (l/s) (m 3 /h) (Pa) (Pa) [db(a)] DKS/S DKS/S DKS/S DKS/S DKS/S DKS/S DKS/S DKS/S DKS/S LpA values presented with room attenuation 4 db (red 10m 2 - sab). When using room attenuation 8 db (red 25m 2 - sab): LpA - 4dB. NR/NC noise criteria 10

11 SOUND LEVEL DATA DKS/W qv DPst DPtot F (Hz) LpA NR NC Swirl pattern (l/s) (m 3 /h) (Pa) (Pa) [db(a)] DKS/W DKS/W DKS/W DKS/W DKS/W DKS/W DKS/W DKS/W DKS/W LpA values presented with room attenuation 4 db (red 10m 2 - sab). When using room attenuation 8 db (red 25m 2 - sab): LpA - 4dB. NR/NC noise criteria 11

12 Adjustment Servicing It is not possible to adjust airflow in DKS itself. In order to enable airflow adjustment and measurement of airflow rate it is recommended to connect the diffuser to TRI balancing plenum. The supply flow rate is determined by using the MSM measurement and adjustment module. Open the front panel and pass the tubes and control spindle through the plastic nozzle. Replace the front panel. Measure the differential pressure using a manometer. The flow rate is calculated using the formula below. q v = k * p m Adjust the airflow rate by rotating the control spindle until the desired setting is achieved. Lock the damper position with a screw. Replace the tubes and spindle in the plenum and replace the diffuser front panel. Detach the front panel of the diffuser by gently pulling it down and let it balance on the hinges. Each nozzle can be easily removed by pressing the stoppers and then pushing the nozzle through the front panel. Wipe the nozzles and the front panel with a damp cloth. The nozzles are replaced into the front plate by pushing. Reattach the front panel. Option with balancing plenum Remove the measurement and adjustment module by gently pulling the shaft; (not the control spindle or measurement tubes!). Wipe the parts with a damp cloth, instead of immersing in water. Reassemble the measurement and adjustment module by pushing the shaft until the unit meets the stopper. Push the front panel back into place so that the springs lock. K factor for installations with different safety distances (D= duct diameter) TRI/S >8XD min 3XD

13 Suggested Specifications The diffuser must be made of epoxy-painted steel with a white (RAL 9010) standard colour. Air is supplied through plastic nozzles, which must have a two-slot design in order to ensure efficient mixing of supply air. Nozzles must also be individually adjustable in order to provide high flexibility for the adjustment of the throw pattern. Option 1; no balancing plenum The diffuser has a hot galvanised steel casing with a spigot with integral gasket for connection to circular duct. The diffuser has a detachable perforated front panel that provides access to the duct. Option 2; option with balancing plenum The diffuser is connected to a balancing plenum equipped with a measurement and adjustment module. The diffuser has a detachable front panel that provides access to the measurement and adjustment module in the plenum. The balancing plenum has a spigot with integral gasket for air-tight duct connection. The balancing plenum has sound attenuation material made of polyester fiber with a washable surface. Product Code DKS/S-D-A S = Airflow pattern S 1, 2, 3 or 4 directions W Swirl jet construction D = Diameter of duct connection 100, 125, 160, 200, 250, 315 A = Diffuser size D=100: 300, 600 D=125: 300, 600 D=160: 300, 450, 600 D=200: 450, 600 D=250: 450, 600 D=315: 600 Specifics and accessories WS = Width of suspended ceiling tile NA Not Assigned x600 CO = Colour W White X Special colour Code example DKS/S , CO=W Sub products TRI Plenum (Diffusers) 13