JDA - Halton Jaz diffuser

• Ceiling diffuser with side slot in square 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 panels for direction of flow pattern in 1-3 directions
• Circular duct connection with rubber gasket

Accessories

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

Product models

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

The diffuser shall be made of painted steel with a white (RAL 9010) 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.

Quick Selection

• Dimensions and Weight
• Material
• Accessories
• Function
• Product models
• Installation
• Adjustment
• Servicing
• Specification
• Order Code

Halton Jaz

JDA -  square ceiling diffuser with side slot  

• Ceiling diffuser with side slot in square 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 panel for direction of flow pattern in 1-3 directions
• Circular duct connection with rubber gasket

Accessories

• Deflector panel to provide control of flow pattern direction.
• Balancing plenum with sound attenuation, measurement and adjustment functions
• Installation panel for modular ceiling

Product models

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

Dimensions and Weight ▲

Halton Jaz JDA, basic model (WS = NA)

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

WS-T = Standard T-bar, tile 600x600
WS-C = Clip-in ceiling, tile 600x600 (Dampa)

Weight

Material ▲

Accessories ▲

Installation panel (PI)

Function ▲

• 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

Product models ▲

Halton Jaz JDA/S (solid front panel)

Halton Jaz JDA/P (perforated front panel)

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

Installation ▲

Fig.1.  Halton Jaz JDA (solid)  installed with installation panel (PI)

The diffuser is connected either directly to the duct by screwing or riveting, or alternatively to the Halton TRI or Halton TRH balancing plenum.

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

The recommended minimum safety distance upstream of the diffuser is 3xD.

In an exhaust application deflector panel is not used.

Installation in suspend ceiling 

Installation with ceiling panel (PI) 

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

Installation with integrated ceiling model (WS)

Installation with Halton TRI or Halton TRH

Diffuser collar of Halton TRI plenum can be installed either internally or externally onto the bottom of the plenum. The height of the unit for the external installation is presented in the table below. When the collar in Halton TRI is installed internally, the heights H and H1 are reduced by 60 mm (see images below). 

 Option 1: Diffuser collar installed externally (Halton TRI or Halton TRH)

Option 2: Diffuser collar installed internally (Halton TRI) 

The technical performance for the combination of supply air diffuser and plenum is presented separately for these two different installation cases.

Adjustment ▲

The diffuser itself has no means for airflow adjustment.

In order to enable airflow adjustment and measurement of airflow rate it is recommended to connect the diffuser to the HaltonTRI/TRH balancing plenum. The supply flow rate is determined by using the measurement and adjustment module MSM.
Open the front plate and pass the tubes and control spindle through the side slot of the diffuser. Replace the front panel.

Measure the differential pressure with a manometer. The flow rate is calculated using the formula below:

Adjust the airflow rate by rotating the control spindle until the desired setting is achieved. Lock the damper position with a screw.
Set the tubes and spindle back into the plenum and push back the diffuser front panel.

The k-factor for installations with different safety distances (D = duct diameter)

Servicing ▲

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.

Specification ▲

The diffuser shall be made of painted steel with a white (RAL 9010) 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.

Order Code ▲

JDA/S-D

S = Model
       S     Solid front panel
       P     Perforated front panel 

D = Nominal duct connection size
       125, 160, 200, 250, 315

Other options and accessories 

CO   = Colour
       W       White (RAL 9010), standard
       X        Special colour (RAL)

WS  = Ceiling integration model
       NA     Not assigned
       T       Standard T-bar ceiling, tile 600x600
       C       Clip-in ceiling, tile 600x600 (Dampa)

ZT  = Tailored product
      N        No
      Y        Yes

Sub products 

      DP    Deflector panel 
      PI      Panel for ceiling installation:
               PI-N     T-bar ceilings
               PI-C     Clip-in (Dampa)

Balancing plenums with airflow controls and sound attenuation
                Halton TRI/S for supply air
                Halton TRI/E for exhaust air
                Halton TRH/S for supply air

 Code example

         JDA/S-200, CO=W, WS=NA, ZT=N