VRI - Plenums

Plenum for demand based ventilation

To be terminated 1.10.2017 - replaced with Halton TRI/V model

  • Supply air plenum for variable flow active diffusers VHB and VHD
  • For optimized demand-based ventilation installations
  • Guarantee of proper function of the supply air diffuser
  • Airtight and robust construction with aesthetic design
  • Effective sound attenuation
  • Access for ductwork cleaning
  • Junction box for cabling an active diffuser as standard with the delivery
  • Detachable measurement and airflow adjustment module MSM

The balancing plenum is made of galvanised steel and shall have an airtight design.

The airflow equalisation module or airflow rate measurement and adjustment module are supplied for supply air applications.

The measurement and adjustment module are adjustable without opening the device.

The balancing plenum has a spigot with integral gasket for airtight duct connection and a plug for ductwork pressure testing.

The balancing plenum attenuates airborne sound, and the sound attenuation material is made of polyester fibre with a washable surface.

Halton VRI/V - to be terminated 1.10.2017

-> replaced with Halton TRI/V model
 

Plenum for demand-based ventilation

  • Supply air plenum for variable flow active diffusers VHB and VHD
  • For optimized demand-based ventilation installations
  • Guarantee of proper function of the supply air diffuser
  • Airtight and robust construction with aesthetic design
  • Effective sound attenuation
  • Access for ductwork cleaning
  • Junction box for cabling an active diffuser as standard with the delivery
  • Detachable measurement and airflow adjustment module MSM

Dimensions

NS  L  H  K  ØD  ØD1 
160/160  458 222 432 159 162
200/200  618 272 592 199 202
250/250  618 336 592 249 252

Material

 Part  Material  Note
 Casing  Galvanised steel  
 Collar  Galvanised steel  
 Attenuation material  Polyester fibre  
 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
 
 Junction box Plastic  
 Hanging and
 safety wire
Steel  

Function

The Halton VRI balancing plenum equalises the airflow by reducing the flow velocity.

Air is spread evenly into the diffuser, ensuring a proper throw pattern in the room space.

The balancing plenum attenuates airborne sounds.

Installation

Halton VRI plenum can be installed using two strips. Connection to distribution ductwork is performed with a spigot including an integral gasket. Halton VRI/V includes a pressure test plug.
 

Halton VRI/V

The VRI/V is connected to the ventilation ductwork with a male inlet connection.
After the ductwork pressure test, the diffuser can be installed.

Hang the diffuser to the wire of the VRI/V plenum.
Connect the actuator cable connector plug to the plug from the plenum junction box.

Fix the actuator assembly to the plenum and tighten two screws.
The power supply and control signal cables are connected to junction box according to the diffuser s wiring instructions.

Wiring


 Junction box                                             Cable connector

Control signals on junction box

Terminal 3

  • 0 VDC  = minimum position / airflow
  • 10 VDC  = maximum position / airflow

Terminal 5

  • Not connected


  •  

Adjustment

The supply airflow rate is determined using measurement and adjustment module MSM. Maximum airflow rate is measured when the active diffuser is fully open.

Pull out the airflow measurement tubes and airflow adjustment spring through the plenum.

Make sure that the active diffuser is fully open.

Measure the differential pressure with a manometer and calculate the airflow rate using the formula below.

qv       Actual airflow rate, l/s
k         Airflow coefficient: see the k value table delivered with the diffuser
Δpm    Measured differential pressure

Adjust the airflow rate by rotating the adjustment spring until the desired setting is achieved. Push the tubes and adjustment spring back into the plenum.

Servicing

Open the diffuser part and detach the perforated plate of the coupling sleeve. Remove the control cone part completely by opening the screw in the middle of the cone.

Loosen two screws which are holding the motor assembly on Halton VHB body and let it hang on the wire.

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

The possible sound attenuation material of the plenum is removable and washable.
Clean the parts with a damp cloth, instead of immersing in water.

Replace all parts in opposite order.

Both the diffuser and the airflow adjustment unit are removable for ductwork cleaning purposes.
Open or detach the diffuser.

Detach the measurement and adjustment module by gently pulling from the unit body. Please, do not pull from the adjustment spring or measurement tubes.

For cleaning of the plenum and diffuser, wipe the plenum and diffuser parts with a damp cloth, instead of immersing in water.
The sound attenuation material of the plenum is removable and washable.

After cleaning, reassemble the sound attenuation material, airflow adjustment unit and diffuser.

Specification

The balancing plenum is made of galvanised steel and shall have an airtight design.

The airflow equalisation module or airflow rate measurement and adjustment module are supplied for supply air applications.

The measurement and adjustment module are adjustable without opening the device.

The balancing plenum has a spigot with integral gasket for airtight duct connection and a plug for ductwork pressure testing.

The balancing plenum attenuates airborne sound, and the sound attenuation material is made of polyester fibre with a washable surface.

Product Code

VRI/S-D-E

S = VRI plenum
    
   V       V model

D = Connection size
     160, 200, 250

E = Dimension of diffuser connection
      160, 200,  250
      

Code example

         VRI/V-160-160

Downloads & Media

Halton VRI - nl
Type
Datasheet
Taal
Nederlands (Nederland)
Grote
544,4 kB
Halton VRI - fr
Type
Datasheet
Taal
Frans (Frankrijk)
Grote
1,0 MB
Halton VRI - se
Type
Datasheet
Taal
Zweeds (Zweden)
Grote
543,6 kB
Halton VRI - fi
Type
Datasheet
Taal
Fins (Finland)
Grote
543,5 kB
Halton VRI - ru
Type
Datasheet
Taal
Russisch (Rusland)
Grote
563,4 kB
Halton VRI - gb
Type
Datasheet
Taal
Engels (Verenigd Koninkrijk)
Grote
544,8 kB