PRI - Plenum

Plenum for grilles

To be terminated 28.02.2017
-> replaced with Halton  PRL

  • Plenum for connecting supply/exhaust grille to ductwork
  • Ensures proper function of the supply air grille
  • Robust, airtight construction with aesthetically pleasing design
  • Flexibility for grille installation due to telescopic collar
  • Detachable measurement (only supply air) and airflow rate adjustment module
  • Effective sound attenuation
  • Access for ductwork cleaning

PRODUCT MODELS & ACCESSORIES

  • Models with alternative duct connection positions
  • Plug for pressure test
     

The PRI balancing plenum for grilles shall be made of galvanised steel and shall have a robust and airtight construction.
Airflow rate measurement and adjustment module shall be available for supply application. The measurement and adjustment module shall be adjustable without opening the grille.
The balancing plenum shall have a spigot with integral gasket for airtight duct connection and a plug for ductwork pressure testing. The PRI plenum shall have options for duct connection on the side, back or top.
The balancing plenum shall attenuate duct noise. The sound attenuation material shall be made of polyester fibre with a washable surface.

Introduction

Halton PRI - to be terminated 28.02.2017

-> replaced with Halton PRL
 

Airtight plenum for grilles 


 

  • Plenum for connecting supply/exhaust grille to ductwork
  • Ensures proper function of the supply air grille
  • Robust, airtight construction with aesthetically pleasing design
  • Flexibility for grille installation due to telescopic collar
  • Detachable measurement (only supply air) and airflow rate adjustment module
  • Effective sound attenuation
  • Access for ductwork cleaning
     

Product Models & Accessories

  • Models with alternative duct connection positions
  • Plug for pressure test


 

Dimensions

Dimensions


Halton PRI


 

NS L L1 H H1 K ØD
200x100 269 201 217 90..150 101 124
300x100 369 301 252 90..150 101 159
400x100 469 401 252 90..150 101 159
500x100 569 501 292 90..150 101 199
300x150 369 301 292 90..150 151 199
400x150 469 401 342 90..150 151 249
500x150 569 501 342 90..150 151 249
600x150 669 601 342 90..150 151 249
800x150 869 801 407 90..150 151 314
400x200 469 401 342 90..150 201 249
500x200 569 501 407 90..150 201 314
600x200 669 601 407 90..150 201 314
800x200 869 801 407 90...150 201 314

No special dimensions possible.
 

Material

Material


Halton PRI 

 Part  Material  Note
 Casing  Galvanised steel  
 Telescopic collar with
 flow equalization
 Galvanised steel  Perforated
 galvanised steel
 Attenuation material  Polyester fibre  
 Spigot with gasket  Galvanised steel  Gasket rubber compound
 Measurement and
 adjustment module
 (MSM/MEM)
 Body: Aluminium
 Plate: Galvanised steel
 Bracket: Galvanised steel
 Plastic parts: Polypropylene (PP)
 Spindle: Stainless steel
 
 Pressure test plug  Polyethylene (PE)  


Accessories

Accessories


Halton PRI

 Accessory Code  Description
 Airflow measurement and
 adjustment unit
MSM  Adjustment and measurement
 module for supply airflow rate
 Airflow adjustment unit MEM  Adjustment module for
 exhaust airflow rate
 Pressure test plug PP  Pressure test plug for duct
 connection in coupling spigot
 Sound attenuation IN  Internal sound attenuation material of polyester


Product Models

Product models


Halton PRI

 Model  Description
 PRI/A  Balancing plenum for supply air with adjustment and
 measurement module MSM and internal sound
 attenuation, duct connection from left or right
 PRI/B  Balancing plenum for supply air with adjustment and
 measurement module MSM and internal sound
 attenuation, duct connection from back
 PRI/C  Balancing plenum for supply air with adjustment and
 measurement module MSM and internal sound
 attenuation, duct connection from top or bottom
 PRI/D  Balancing plenum for exhaust air with adjustment
 module MEM and internal sound attenuation,
 duct connection from left or right
 PRI/E  Balancing plenum for exhaust air with adjustment
 module MEM and internal sound attenuation,
 duct connection from back
 PRI/F  Balancing plenum for exhaust air with adjustment
 module MEM and internal sound attenuation,
 duct connection from top or bottom
 PRI/G  Balancing plenum without adjustment and measurement
 module and internal sound attenuation,
 duct connection from left or right
 PRI/H  Balancing plenum without adjustment and measurement
 module and internal sound attenuation,
 duct connection from back
 PRI/I  Balancing plenum without adjustment and measurement
 module and internal sound attenuation,
 duct connection from top or bottom


Duct connections

For Halton PRI there are 3 possible duct connections:




A      Side connection  (PRI/A, D, G)
B      Back connection (PRI/B, E, H)
C      Top connection   (PRI/C, F, I) 

Function

Function


Halton PRI 


 

  • Halton PRI balancing plenum equalises the airflow by reducing the flow velocity.
  • Air is spread evenly into the grille, ensuring proper function.
  • A range of grilles can be connected to the distribution duct with the aid of
    a Halton PRI, improving their characteristics considerably.
  • The plenum also attenuates duct noise.
  • Halton PRI can also be used as an exhaust unit.

Installation

Installation


Halton PRI 



Code description
1.   Telescopic collar
2.   Pressure test plug


Halton PRI is connected to the duct with a spigot equipped with a gasket. The duct connection can be located on the side, above/below or behind the plenum. Due to the symmetrical structure of the Halton PRI, connections can be made in a number of different ways: by turning the plenum right or left, or by rotating, from above or below. The telescopic collar (1) of the plenum permits mounting into walls of thickness 90...150 mm. For installation with Halton EVA exhaust unit no telescopic collar is used.

The recommended safety distance upstream of the plenum in supply installations is minimum 3D.

Dimensions for installation hole are (L1+5mm) x (K+5mm).
 

Adjustment

Adjustment


Halton PRI

 

To perform the pressure test, the adjustment module shall be removed by pulling gently from the body, not from control spindle or measurement tubes. Install the pressure test plug (2) to the spigot by pulling gently until it meets the stopper. Remove the pressure test plug after the pressure test is performed and remount the adjustment module into place. Avoid bending the spindle too much.

The supply flow rate is determined by using the measurement and adjustment module MSM.
The tubes and control spindle are passed through the grille. 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. Replace the tubes and spindle into the plenum.

When Halton PRI is used for exhaust air, airflow rate is determined by using the separate measurement tab located inside the plenum.
 

Servicing

Servicing


Halton PRL 

Detach the grille and the perforated plate of the telescopic collar. Detach the measurement and adjustment module by pulling gently from the casing (not from the control spindle or measurement tubes). Wipe the parts with a damp cloth, instead of immersing in water.

The measurement and adjustment module is remounted by pushing the body until it meets the stopper.

The sound attenuation material within the plenum can also be removed (the material is washable), to enable cleaning of the inner side of the plenum. The material is detached by releasing the retaining brackets, which are replaced after washing.
Replace the grille after cleaning.
 

Technical specification

Technical specification

 

The Halton PRI balancing plenum for grilles shall be made of galvanised steel and shall have a robust and airtight construction.
Airflow rate measurement and adjustment module shall be available for supply application. The measurement and adjustment module shall be adjustable without opening the grille.

The balancing plenum shall have a spigot with integral gasket for airtight duct connection and a plug for ductwork pressure testing. The Halton PRI plenum shall have options for duct connection on the side, back or top.
The balancing plenum shall attenuate duct noise. The sound attenuation material shall be made of polyester fibre with a washable surface.
 

Product Code

Product code


PRI/S-W-H-D

S = Model
  
    A    Supply inlet connection           (Left-Right)
       B    Supply inlet                            (Back)
       C    Supply inlet                            (Top/Bottom)
       D    Exhaust outlet connection       (Left-Right)
       E    Exhaust outlet connection       (Back)
       F    Exhaust outlet connection       (Top/Bottom)
       G    No accessories - Connection   (Left - Right)
       H    No accessories - Connection   (Back)
       I     No accessories - Connection   (Top/Bottom)

W = Width of grille connection
       200, 300, 400, 500, 600, 800

H = Height of grille connection
       100, 150, 200
      
D = Connection size
      
125, 160, 200, 250 
       


Other options and accessories
 

ES = Model for EVA exhaust unit
   
     N         No
         Y         Yes

AC = Accessories
         MSM    Measurement and adjustment module, supply
         MEM    Adjustment module, exhaust
         PP       Plug for pressure test
         IN         Heat and sound insulation
         MS1     MSM with adjusting spin.L=1500
         ME1     MEM with adjusting spin.L=1500

ZT = Tailored product
        N          No


Code example

         PRI/A-200-100-125, AC=MS1, ZT=N
 

Downloads & Media

Halton PRI - fr
Type
Datasheet
Language
French (France)
Size
2.1 MB
Halton PRI - ru
Type
Datasheet
Language
Russian (Russia)
Size
2.8 MB
Halton PRI - uk
Type
Datasheet
Language
English (United Kingdom)
Size
2.7 MB
Halton PRI - fi
Type
Datasheet
Language
Finnish (Finland)
Size
2.7 MB
Halton PRI - se
Type
Datasheet
Language
Swedish (Sweden)
Size
2.7 MB