Variable air volume active exhaust diffuser for Halton Workplace system. Suitable for demanding office conditions.
|Diffuser plate||Steel||Powder painted, white
|Special colour available|
|Front panel||Perforated steel||Powder painted, white
|Special colour available|
|Balancing vanes||Aluminium||Powder painted||–|
|Plenum casing||Galvanised steel||–||–|
|Attenuation material||Polyester fibre||–||–|
|Flow control damper||Casing:
The Halton Jaz Perforated VAV is an active ceiling diffuser unit for exhaust air.
The air is exhausted from the space through the perforated front panel and the side slot of the diffuser. Maximum airflow rate is selectable and will be made with the movable balancing vanes in the diffuser.
An external room controller varies the room airflow rate by running the Halton Jaz Perforated VAV diffuser’s actuator with a standard 2 – 10 V control signal. The pressure dependent function of the Halton Jaz Perforated VAV operates in combination with constant pressure ductwork.
Effective sound attenuation reduces the generated noise and attenuates the duct noise.
The Halton Jaz Perforated VAV exhaust air diffuser unit is available for installation in different suspend ceiling types.
Clip-in ceilings Fine-line 15 ceilings
The Halton Jaz Perforated VAV active air exhaust diffuser shall be connected to the control system.
With 10 V control signal the active flow control damper is fully open.
The balancing function will not be avaialble when Halton Jaz Perforated VAV exhaust diffuser is connected to Halton Vario control system and when getting the control signal from supply air terminal. In that case the control vanes should be adjusted to the position 20 and maximum and minimum airflow rates shall be adjusted with the control signal.
In balancing function ensure that the flow control damper on each active Halton Jaz Perforated VAV exhaust air diffuser is fully open. This can be done either mechanically or electrically:
Check that the duct zone constant pressure is at the intended level (for examble between 30 to 50 Pa. If the airflow rate of the active exhaust diffuser is too high, adjust the position of the balancing vanes to the closer position. If the maximum airflow can not be reached, open the vanes first fully open and if this is not enough, increase the duct zone pressure.
The minimum airflow rate if factory pre-adjusted to the variable flow control damper and can not be adjusted.
Airflow rate is calculated using the pressure difference reading and the k factors
(see formula below):
qv Calculated airflow rate [l/s]
k Coefficient = 14.3 (opening 20)
Δpm Measured pressure [Pa]
1. Diffuser plenum
2 . Front panel
3. Fixing screws
4. Balancing vanes
For servicing open the front panel (2) of the diffuser and detach the flow control element. Detach the balancing vanes (4) by opening the screws (3) and remove the vanes.
Clean the parts with a damp cloth instead of immersing in water.
Replace the parts in opposite order. Ensure that the balancing vanes are in right position.
The active exhaust diffuser unit is made of steel and powder painted with a white (RAL 9003/30%) standard colour. Air is exhausted through the perforated front panel and the side slot of the diffuser.
The system balancing and maximum airflow selection are made with the balancing vanes in diffuser.
Variable airflow rate is controlled with the electrical flow control damper.
The diffuser is integrated to a balancing plenum designed for the active diffuser installation and equippped with air measurement and sound attenuation properties.
D = Size for duct connection (mm)
CO = Colour
SW White (RAL 9003)
X Special colour (RAL xxxx)
IO = Ceiling type installation options
NA T-profile (standard)
DC Clip-In ceiling
ZT = Tailored product
Y Yes (ETO)
JDE-200, CO=SW, IO=DC, ZT=N