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Halton Jaz JDB – Diffuser with side slot

Halton’ s Jaz series of diffusers combine excellent performance with iconic design . The aerodynamic construction is silent in operation and efficient to buy as smaller diffuser sizes  can be utilized.

The diffusers are available for both supply and exhaust ensuring  architectural ceiling outlook.

  • Circular diffuser with solid or perforated front panel
  • Detachable front panel enables  cleaning of the diffuser and ductwork
  • Deflector panels for direction of flow pattern in 1-3 directions
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Overview

  • Ceiling diffuser with side slot in circular shape
  • Suitable for supply and exhaust
  • Installation either directly to ductwork or to balancing plenum
  • Detachable front panel enables the cleaning of the diffuser and ductwork
  • Deflector parts for direction of flow pattern in 1-3 directions
  • Circular duct connection with rubber gasket

Accessories

  • Set of deflector parts provide control flow pattern direction.
  • Balancing plenum with measurement and adjustment functions
  • Installation panel for modular ceiling

Product models

  • JDB/S, solid front panel
  • JDB/P, perforated front panel
  • Direct installation to the ceiling opening
    • Standard T-bar ceiling
    • Clip-in ceiling

Operating principle

  • Air is supplied into the space through the side slots and mixed with the room air outside the diffuser.
  • Recommended maximum air temperature difference between supply and room air is 10 °C.
  • The throw pattern can be deflected in different (1, 2 and 3) directions with the deflection panels.

Features and options

Accessory Code Description
Deflector part DP A set of parts for providing the flow pattern in 3, 2 and 1  directions (not needed for 4 direction flow)
Balancing plenum PDI For balancing and equalising the airflow and attenuating the duct noise
Installation panel PI-N For standard 600×600 module ceiling installation, colour white (RAL 9003)
PI-C For Clip-In module ceiling installation, colour white (RAL 9003)

Installation panel (PI)

Quick selection

Values with adjustment module (MSM) fully open.


Fig. 1. Quick selection, supply with unit l/s

 


Fig. 2. Quick selection, supply with unit m3/h

Materials

Part Material Note
Upper plate Steel
Upper plate,
ceiling integrated model (WS)
Steel
Front panel Steel
Deflection parts (DP) Foamed plastic
Coupling sleeve with gasket Galvanised steel Gasket rubber compound
Installation panel (PI) Steel
Finishing Painted, white
(RAL 9003/30%)
Special colours available

Dimensions and weight

Halton Jaz JDB, basic model (WS=NA)

NS
[mm]
Ø W
[mm]
H
[mm]
ØD
[mm]
Weight
[kg]

125 300 116 124 1.2
160 300 121 159 1.2
200 450 126 199 2.4
250 450 136 249 2.4
315 570 146 314 4.4

Halton Jaz JDB, ceiling integrated model (WS = T or C)

NS
[mm]
W
[mm]
W1
(WS=T)
[mm]
W1
(WS=C)
[mm]
H
[mm]
ØD
[mm]
125 300 595 600 119 124
160 300 595 600 124 159
200 450 595 600 129 199
250 450 595 600 139 249
315 600 595 600 149 314

WS-T  =  Standard T-bar, tile 600×600
WS-C  =  Clip-in ceiling, tile 600×600

Halton Jaz JDB with Halton Pop PDI plenum


Fig. 3. Halton Jaz JDB with Halton Pop PDI plenum, externally positioned connection spigot

 


Fig. 4. Halton Jaz JDB with Halton Pop PDI plenum, internally positioned connection spigot

JDB W
[mm]
PDI ØD
[mm]
ØD1
[mm]
L
[mm]
W1
[mm]
H
[mm]
L1
[mm]
Weight
[kg]
125 300 100-125 99 127 308 282 172 168 3.9
300 125-125 124 127 308 282 172 168 4.0
160 300 125-160 124 162 308 282 172 168 3.9
300 160-160 159 162 458 358 239 280 6.2
200 450 160-200 159 202 458 358 239 280 7.3
450 200-200 199 202 458 358 239 280 7.4
250 450 200-250 199 252 458 358 239 280 7.3
450 250-250 249 252 520 480 359 280 10.6
315 570 250-315 249 317 520 480 359 280 12.4
570 315-315 314 317 520 480 359 280 12.6

Product models

Halton Jaz JDB/S (solid front panel)

 Halton Jaz JDB/P (perforated front panel)

 Halton Jaz JDB, ceiling integrated model (WS=T or C)

Specification

The diffuser shall be made of painted steel with a white (RAL 9003) standard colour. Air shall be introduced into the space through the side slot, ensuring a high mixing rate. Flow pattern of the diffuser shall be adjustable in 1, 2 or 3-way directions by shaping the deflector.

Alternative 1: No balancing plenum

The diffuser shall have a spigot with integral gasket for connection to circular duct.
The diffuser shall have a detachable solid or perforated front panel to provide access to the duct.

Alternative 2: Option with balancing plenum

The diffuser shall be connected to a balancing plenum equipped with a measurement and adjustment module.
The diffuser shall have a detachable solid or perforated front panel to provide access to the measurement and adjustment module in the plenum.
The balancing plenum shall have a spigot with integral gasket for airtight duct connection.
The balancing plenum shall comprise sound attenuation material made of polyester fibre with a washable surface.

Installation


Fig. 5. Halton Jaz JDB diffuser connected to a Halton Pop PDI plenum

The diffuser is connected usually to balancing plenum Halton Pop PDI. Alternatively, it can be connected direct to the duct by riveting or screwing. In that case, minimum safety distance to the next T-branch or curve is three times the duct diameter (3xD).

The desired flow pattern is selected during installation with the deflector panels, according to the installation manual.

Installation in suspended ceiling

Ø D Ø d
124 160
159 215
199 255
249 320
314 405

Installation with ceiling panel (PI)

The ceiling panel will enable installation in different modular suspend ceiling tiles.
 

Code Description
PI-N T-bar ceilings
PI-C Clip-in ceilings

Installation with integrated ceiling model (WS)


Code Description
WS-T T-bar ceilings
WS-C Clip-in ceilings

 

Commissioning


Fig. 6. Adjustment of airflow of diffuser and plenum combination

Airflow control

The diffuser itself has no airflow adjustment. To adjust and measure the supply airflow rate, the diffuser shall be combined with Halton Pop PDI balancing plenum with measurement and adjustment module MSM. In case of exhaust air, use of adjustment module MEM is recommended. It is not possible to measure exhaust airflow rate with adjustment module MEM.

Open the front plate and pass the tubes and control spindle through the front panel (Fig. 6.). Replace the front panel. Measure the differential pressure with a manometer. The flow rate is calculated using the formula below:

where

  • qv           Airflow rate [l/s] or [m3/h]
  • ∆pm      Measured pressure [Pa]
  • k            The k factor (see the table below)

Adjust the airflow rate by rotating the control spindle until the desired airflow rate (pressure difference) is achieved.

Set the tubes and spindle back into the plenum. Damper position can be locked with a knurled head screw of the adjuster.

Duct connection (PDI) k factor of MSM adjuster, opening >0 [l/s]
> 8D Min. 3D
100 5.7 7.5
125 9.6 12.6
160 16.4 21.9
200 26.3 31.0
250 47.1 51.5
315 78.8

 

Duct connection (PDI) k factor of MSM adjuster, opening >0 [m3/h]
> 8D Min. 3D
100 20.6 27.0
125 34.4 45.4
160 59.0 78.8
200 94.8 111.6
250 169.5 185.4
315 283.6

Maintenace

Open the front panel of the diffuser and clean the parts by wiping them with a damp cloth.

Push the front panel back into place so that the springs lock.

Option with balancing plenum

Open the front panel of the diffuser.
Remove the measurement and adjustment module by gently pulling the shaft.
Note: Not the control spindle or measurement tubes!

Wipe the parts with a damp cloth, instead of immersing in water.

Remount the measurement and adjustment module by pushing in the shaft until the unit meets the stopper.
Push the front panel back into place so that the springs lock.

Order code

JDB/S-D; CO-WS-ZT

Main options
S = Model
S Solid front panel
P Perforated front panel
D = Diffuser duct connection size [mm] 125, 160, 200, 250, 315
Other options and accessories
WS = Ceiling integration model
NA Not assigned
T T-bar ceiling, tile 600×600 (standard)
C Clip-in ceiling, tile 600×600
CO = Colour
SW Signal white (RAL 9003)
X Special colour (RAL xxxx)
ZT = Tailored product
N No
Y Yes (ETO)
Sub product (ordered separately)
DP Deflector part
PI-N Panel for T-bar ceiling installation
PI-C Panel for Clip-in ceiling installation
Halton Pop PDI Balancing plenum

Order code example

JDB/S-200, WS=NA, CO=SW, ZT=N

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