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Plenum for diffusers
Plenum for diffusers

Halton TRH – Plenum for diffusers

Airtight plenum for general use.

  • Plenum ensuring proper function of supply air ceiling diffuser and connecting to ductwork
  • Flexibility for levelling diffuser elevation

Overview

  • Plenum ensuring proper function of supply air ceiling diffuser and connecting to ductwork
  • Flexibility for levelling diffuser elevation
  • Detachable measurement and airflow rate adjustment module
  • Effective sound attenuation
  • Access for ductwork cleaning

Dimensions

NS ØD ØD1 L W H L1
100-100 99 102 281 281 152 141
100-125 99 127 281 281 152 141
100-160 99 162 281 281 152 141
125-125 124 127 431 431 180 216
125-160 124 162 431 431 180 216
125-200 124 202 431 431 180 216
125-250 124 252 431 431 180 216
160-160 159 162 431 431 212 216
160-200 159 202 431 431 212 216
160-250 159 252 431 431 212 216
200-200 199 202 550 400 245 355
200-250 199 252 550 400 245 355
200-315 199 317 550 400 245 355
250-250 249 252 600 450 295 378
250-315 249 317 600 450 295 378
250-400 249 402 600 450 295 378
315-315 314 317 650 500 360 398
315-400 314 402 650 500 360 398

Structure and material

No. Description Material
1 Measurement and
adjustment module
(MSM / MEM)
Body: Aluminium
Plate: Galvanised steel
Brackets: Galvanised steel
Plastic parts: Polypropylene (PP)
Spindle: Stainless steel
2 Attenuation Polyester fibre or mineral wool
3 Duct seal gasket IC-polyurethane hybrid
4 Casing Galvanised steel

Accessories

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
Sound attenuation material AT Internal sound attenuation material
of mineral wool or polyester fibre
Sides of sound attenuation IN 3 sides or 5 sides

Function

Halton TRH balancing plenum equalizes the supply airflow by reducing the flow velocity .

Air is spread evenly into the diffuser ensuring proper function.

A range of diffusers can be connected to the distribution ductwork using TRH-plenum, which improves their functional characteristics considerably.

The balancing plenum also attenuates duct noise.

Installation

The plenum is connected to the ductwork by use of spigot.

Adjustment for the desired airflow rate can be performed after installation.

The recommended safety distance before Halton TRH plenum is at least 3*D.

The diameter of installation hole in ceiling tile shall be at least 5 mm larger than the diffuser connection.

Adjustment

The supply flow rate is determined by using the measurement and adjustment module MSM.

The tubes and control spindle are passed through the diffuser. Measure the differential pressure with a manometer. The flow rate is calculated using the formula below.

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

NS > 8xD min. 3xD
100 6.5 7.5
125 10.8 12.6
160 19.4 21.9
200 29.7 31.0
250 48.8 51.5
315 81.3 83.1

Adjust the airflow rate by rotating the control spindle until the desired setting is achieved. If needed lock the damper position with a screw. Replace the tubes and spindle into the plenum.

Servicing

Open or detach the diffuser. 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, to enable cleaning of the inner side of the plenum. Close or replace the diffuser after cleaning.

Specification

The balancing plenum is made of galvanised steel and has a robust and airtight construction.

The airflow rate measurement and adjustment module are available for supply application and adjustment module for exhaust application. The measurement and adjustment module is adjustable without opening the device.

The balancing plenum has a spigot with integral gasket for airtight duct connection.

The balancing plenum attenuates duct noise. The sound attenuation material is made of polyester fibre with a washable surface or mineral wool located on three or five sides of plenum.

Order code

TRH/S-D-E; AT-IN-OM-ZT

D = Diameter of duct connection (mm)
100, 125, 160, 200, 250, 315

E = Diameter of diffuser connection (mm)
100, 125, 160, 200, 250, 315, 400

Other options and accessories

AT = Sound attenuation material
W      Mineral wool
D       Polyester fibre
N       No sound attenuation

IN  = Sides of sound attenuation
3       Sound attenuation on 3 sides
5       Sound attenuation on 5 sides
N       No sound attenuation

OM = Measurement and adjustment module
YS     MSM (Supply)
YE     MEM  (Exhaust)
NA     Not assigned

ZT = Tailored product
N       No
Y       Yes (ETO)

Code example

TRH-100-125,AT=D, IN=3, OM=YS, ZT=N

Downloads

Halton TRH – Plenum for diffusers
Data
en
Halton TRH – Liitäntälaatikko hajottajille
Data
fi
Halton TRH – Plénum pour diffuseur à raccordement circulaire
Data
fr
Halton TRH – Anslutninslåda för spridare
Data
se
Halton TRH - fr
Datasheet
fr_FR
807.22 KB
  • Max. file size: 128 MB.

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