JDS - Halton Jaz for Vario

Halton Jaz for Vario

适用于Halton Vario 系统的变风量主动式送风散流器。适用于要求苛刻的办公室环境

 

  • 稳定的射程长度和可变风量可实现无吹风感送风
  • 吊顶安装
  • 用于定静压管道系统
  • 具有测量和调节功能的静压箱
  • 有效的消音装置

Halton JDS 送风散流器由标准白色 (RAL 9010) 的彩钢板制成。
通过可调节的控制板和前挡板的侧隙将空气送到室内,从而确保较高的混合效率。散流器始终维持出风速度恒定。

散流器集成到一个专门为主动型散流器安装而设计的静压箱中,并配有测量和调节模块。

散流器配有一个合成橡胶密封圈,从而确保与管道紧密连接在一起。

散流器能够配备传感器和控制系统。

Halton Jaz for Vario

JDS - active diffuser for supply air  

Halton Jaz  family exhaust air diffuser for variable airflow rate

  • Stable throw length with variable air flow rates for enabling draught free air distribution
  • Installation for suspended ceiling
  • Designed for systems with constant static pressure ductwork system
  • Integrated balancing plenum with measurement and adjustment functions
  • Effective sound attenuation
     

Dimensions

 

NS Ø D H1 H2
125 124 276 114
160 159 276 114
200 199 326 139
250 249 326 139

Material

 Part  Material  Finishing  Note
 Diffuser plate  Steel  Powder painted,
 white
 (RAL 9010)
 Special colours available
 Front panel  Steel  Powder painted,
 white
 (RAL 9010)
 Special colours available
 Control cone  Steel  Powder painted,
 black
 
 Gasket  Rubber compound    
 Plenum casing  Galvanised steel    
 Control box  Galvanised steel    
 Attenuation
 material
 Polyester fiber    
 Spigot with gasket  Galvanised steel    Gasket of rubber compound

 Measurement and
 adjustment module
 (MSM)

 Body:
 aluminium
 Plate:
 galvanised steel
 Brackets:
 galvanised steel
 Plastic parts:
 polypropylene (PP)
 Spindle:
 stainless steel

   

Function

The Halton Jaz JDS is an active ceiling diffuser for supply air in variable conditions.

Air is supplied horizontally to the room space mainly through the slots of the diffuser.
 

The room air will circulate through the perforation in the front panel to the sensors located inside the diffuser.

The unit maintains a nearly constant outlet air velocity between the minimum and maximum airflow rates, create comfortable conditions and low residual air velocities in the occupied zone. Room conditions can be guaranteed without a risk of draughts, at both the maximum and minimum airflow rate.

Recommended maximum air temperature difference between supply and room air is 12 ° C.

An external room controller varies the room air flow rate by running the Halton Jaz JDS diffuser actuator with a standard 0...10 VDC control signal.

The pressure dependent function of the Halton Jaz JDS operates in combination with a constant pressure duct zone.

Exhaust diffuser do not include any airflow control function, will need a separate flow control damper (like Halton HFB).

Installation

The Halton Jaz JDS active diffuser shall have a minimum safety distance of 3 x duct dimension to ensure reliable measurement and accurate control of the airflow rate.

Hang the diffuser by using the brackets located on two sides of the plenum.
 

Alternatively ceiling integrations

  

               Clip-in ceilings                                      Fineline-15 ceilings         
 

NS ØD H1 H2
125 124 276 114
160 159 276 114
200 199 326 139
250 249 326 139

Controls

The Halton Vario Jaz controller is a room controller dedicated to complete room applications providing the demand controlled ventilation.

  • Halton Vario Jaz diffuser integrated with room controller
  • Room air temperature measurement to control space temperature
  • Occupancy sensor for demand based operation located outside of the diffuser (separate ceiling installation)
  • Air quality control with carbon dioxide sensor, CO2

The Halton Vario Jaz room controller provides a wide variety of connections for sensors and actuators and the possibility to connect a wall mounted panel with or without a display for local set points adjustment e.g. temperature, and a wireless remote control.

See documents from the Documents-section for more information.

Wiring

Control that the actuator settings are in line with the factory pre-setted DIL switches.

 

Control signals in junction box:
Terminal 1              Power supply 24 VAV
Terminal 2              Ground
Terminal 3              0 VDC   = minimum position / airflow
                             10 VDC = maximum position / airflow
Terminal 4               Not connected (feedback form actuator)

Commissioning


Make sure that the control plate of diffuser is fully open (at the lowest position). This can be done either mechanically or electrically:

  • If the power is not connected to active diffuser, detach the control plate for releasing the actuator clutch and pull the control plate to the fully open position.
  • If a 24 VAC power supply is connected to diffusers, please make sure that the control signal is constantly at 10 VDC.

Check that the duct zone constant pressure is at the intended level (for example, between 30 and 50 Pa).

If the duct zone pressure is too low and the zone pressure control damper is fully open, you should either adjust the supply fan pressure set point to be higher or adjust the MSM adjustment unit.

The zone pressure control damper shall have a sufficient operative differential pressure over the damper (for example, 30 Pa or more).
 

Adjustment

The maximum airflow rate of the active diffuser is measured and adjusted using the MSM module.

Airflow rate is calculated using the pressure difference reading and the k factor.

qv       Calculated airflow rate (l/s)
        Factor from the table
Δpm    Measured pressure (Pa)

The k-factors for installation with different safety distances
(D = duct diameter).

 NS > 8 * D min 3 * D
125 9,5 12,6
160 18,0 22,2
200 28,6 32,9
250 44,6 46,0

If the airflow rate of the active diffuser is too high, adjust the position of the MSM adjustment unit to closer position. If maximum airflow can't be reached, open MSM module first full open and if this is not enough, increase the duct zone pressure

The minimum airflow for the diffuser is fixed by factory and cannot be adjusted.

Servicing

For servicing open the front panel of the diffuser and detach the flow control element.

Detach the flow control plate by opening the screw (1) and remove the plate (2).
Remove the motor assembly (3) on JDS body by pushing the mounting shaft and let it hang on the wire.
 

 

The MSM is removed through diffuser outlet by pulling from it's body - not from the measurement tubes or control spindle.

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

Replace all parts in opposite order. Ensure that the actuator is locked and the control plate is in right position.

Specification

The Halton JDS supply air diffuser is made of painted steel with a white (RAL 9010) standard colour.
Air is introduced into the space through the adjustable control plate and the side slots of front panel, ensuring a high mixing rate. The diffuser maintains appropriate discharge velocity throughout the total airflow range.

The diffuser is integrated to a balancing plenum designed for the active diffuser installation and equipped with a measurement and adjustment module.

The diffuser has a gasket of rubber compound to ensure tight connection to the duct work.

The diffuser enables to be equipped with sensors and control system.

Order code

JDS/S-D; CO-IO-RC-SE-ED-CP-ZT

S = Model
       S        Supply
       E        Exhaust

D = Duct connection
      
125, 160, 200, 250
 

Other options and accessories

CO = Colour
         
W      White RAL 9010
          X       Special colour

IO  = Ceiling type installation options
          
NA      Standard T-profile
          DC     Clip-In ceiling
          FL      Fineline-15

RC = Room controller
          NA     Not assigned

          LA1    LON, HVL-527 for single unit
          LA2    LON, HVL-527 for up to 6 units
          LA3    LON, without room controller

          BA1    BACnet, HVB-527 for single unit
          BA2    BACnet, HVB-527 for up to 6 units
          BA3    BACnet, without room controller

          MA1    Modbus, HVM-238T for single unit
          MA2    Modbus, HVM-237T for up to 6 units
          MA3    Modbus, without room controller

          All room controller models include unit integrated temperature sensor.

SE = Sensors
         
NA      Not assigned

          SA1    Occupancy (only with LA- and BA- series)
          SA2    Occupancy and CO2 (only with LA- and BA- series)
          SA3    CO2 (only with LA- and BA- series)

          SB1    Occupancy (only with MA- serie)
          SB2    Occupancy and CO2 (only with MA- serie)
          SB3    CO2 (only with MA- serie)

ED = Exhaust air diffuser control
         
Y        Yes
          N        No

CP = Control panel
         
NA      Not assigned

          PA2    With setpoint shift and display (BACnet and LON only)
          PA3    Remote control unit (BACnet and LON only)
          PB1    With setpoint shift (Modbus only)
          PB2    With setpoint shift and display (Modbus only)

ZT  = Tailored product
          N        No
          Y        Yes

Code example

         JDS/S-200, CO=W, IO=NA, RC=LA1, SE=SA3, ED=N, CP=PA2, ZT=N

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