PLC - Plenum box

Plenum for diffusers

Terminated as of 1 July 2018
-> replaced with Halton TRH

  • Plenum for connecting ceiling diffuser/exhaust unit to ductwork
  • Ensures proper function of the supply air diffuser
  • Access for ductwork cleaning

Product Models and Accessories

  • Model with sound attenuation, mineral wool or polyester fibre
  • Detachable airflow rate measurement and adjustment module available.

The plenum is made of galvanised steel.

The plenum comprises an airflow measurement and adjustment module.
The diffuser is detachable in order to provide access to the measurement and adjustment module in the plenum.

The plenum comprises sound insulation material made of mineral wool or polyester fibre

The plenum reduces duct pressure and air velocity in order to spread the supply air evenly in the diffuser and improve the air distribution quality.

Halton PLC - terminated as of 1 July 2018
-> replaced with Halton TRH

Plenum for diffusers

  • Plenum for connecting ceiling diffuser/exhaust unit to ductwork
  • Ensures proper function of the supply air diffuser
  • Access for ductwork cleaning

Product Models and Accessories

  • Model with sound attenuation, mineral wool or polyester fibre
  • Detachable airflow rate measurement and adjustment module available.

Dimensions

 

NS W W1 W2 H ØD ØD1
100 300 340 63 225 99 102
125 300 340 63 225 124 127
160 300 340 63 225 159 162
200 450 490 63 315 199 202
250 450 490 63 315 249 252
315 500 540 63 465 314 317
355 500 540 63 465 354 357
400 500 540 63 465 399 402
450 650 690 63 665 449 452
500 650 690 63 665 499 502
560 650 690 63 665 559 562
630 750 790 63 680 629 632

Material

 Part  Material  Note
 Plenum / spigot  Galvanised steel  
 Sound attenuation  Mineral wool
 or polyester fibre
 The mineral wool is fixed with nails

Accessories

 Accessory Code  Description
 Balancing plenum PLC  For balancing and equalising the airflow
 (with airflow adjustment and measurement unit)
 Sound attenuation 3W  Mineral wool in the
 PLC plenum on 3 sides
 Sound attenuation 6W  Mineral wool in the
 PLC plenum on 6 sides
 Sound attenuation 3P  Polyester fibre in the
 PLC plenum on 3 sides
 Sound attenuation 6P  Polyester fibre in the
 PLC plenum on 6 sides
 Airflow measurement and
 adjustment unit
MSM  For supply installation
 (for spigot with diameter < 315)

Function

The duct pressure and air velocity are reduced inside the Halton PLC plenum.
Air is spread evenly in the diffuser ensuring proper air distribution function.

The airflow rate can be adjusted using the optional measurement and adjustment module MSM.

Installation

Key:
1.  Plenum
2.  Measurement and adjustment module (MSM)

The plenum is installed into the suspended ceiling with M8 drop rods (not supplied in the delivery).

Connect to the ductwork with a spigot equipped with an integral gasket.

When equipped with a measurement and adjustment module, the recommended safety distance upstream of the device is at least 3D in order to ensure a reliable airflow rate measurement.

The unit s control spindle must not be excessively bent.

Adjustment

In order to enable airflow adjustment and measurement of airflow rate, it is recommended that the diffuser be connected to the plenum equipped with the MSM module.
The supply flow rate is determined by using the measurement and adjustment module MSM.

Detach the diffuser and pass the tubes and control spindle through the diffuser.
Replace the diffuser.

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

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

PLC  >8xD  min 3xD 
125  9.9 12.6
160  16.9 21.9
200  28.3 31.0
250  47.9 51.5
315  78.6 -

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 and replace the diffuser 

Servicing

Remove the measurement and adjustment module by gently pulling the shaft (not the control spindle).
Wipe the parts with a damp cloth, instead of immersing in water.

Remount the measurement and adjustment module by pushing the shaft back into place until the module meets the stopper.

Specification

The plenum is made of galvanised steel.

The plenum comprises an airflow measurement and adjustment module.
The diffuser is detachable in order to provide access to the measurement and adjustment module in the plenum.

The plenum comprises sound insulation material made of mineral wool or polyester fibre.

The plenum reduces duct pressure and air velocity in order to spread the supply air evenly in the diffuser and improve the air distribution quality.

Order Code

PLC/D-E,IN-OM-ZT

D = Connection size
       100, 125, 160, 200, 250, 315, 355, 400, 450, 500, 560, 630

E = Dimension of diffuser connection
       100, 125, 160, 200, 250, 315, 355, 400, 450, 500, 560, 630

Other Options and Accessories

IN = Sound attenuation material
        N        No attenuation material
        3W     Sound attenuation material on 3 sides, mineral wool
        6W     Sound attenuation material on 6 sides, mineral wool
        3P      Sound attenuation material on 3 sides, polyester fibre
        6P      Sound attenuation material on 6 sides, polyester fibre

 OM = Measurement/adjustment module (MSM)
          N     No
          Y     Yes

ZT = Tailored product
         N      No
         Y      Yes
 

Code example

            PLC-100-N, MS=N, ZT=N

Downloads & Media

Halton PLC - fr
Type
Datasheet
Language
French (France)
Size
1.0 MB
Halton PLC - fi
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Finnish (Finland)
Size
465.8 kB
Halton PLC - se
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Swedish (Sweden)
Size
464.9 kB
Halton PLC - ru
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Language
Russian (Russia)
Size
481.1 kB
Halton PLC - uk
Type
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Language
English (United Kingdom)
Size
463.3 kB
Halton PLC - nl
Type
Datasheet
Language
Dutch (Netherlands)
Size
463.6 kB