EN3_300x200_3d_01psd.png
CAV controllers

EN (Generation 3) with actuator

EN_gc_sv_Detail_01.psd.png

Visual display of the damper blade position

EN3_300x200_3d_02.psd.png
CAV controllers

Actuator for switching between setpoint values or steady operation

EN3_500x400_3d_02.psd.png
CAV controllers

Large dimensions as double version

doc_graphic_000009.png
Tested to VDI 6022

Conforms to VDI 6022

EN3_300x200_3d_01psd.png
EN_gc_sv_Detail_01.psd.png
EN3_300x200_3d_02.psd.png
EN3_500x400_3d_02.psd.png
doc_graphic_000009.png

EN 

For precise control of normal to high constant volume flow rates

Rectangular, mechanically self-powered air terminal units for supply and extract air systems with constant air volume flows


  • Suitable for volume flow rates up to 12600 m³/h or 3500 l/s
  • Volume flow rate adjustment from outside by rotary knob
  • Easy retrofitting of an actuator for volume flow setpoint adjustment
  • High control accuracy
  • No on-site test measurements required for commissioning
  • Casing air leakage to EN 1751, class C
  • Visual display of the damper blade position for operating point optimisation

 


Optional equipment and accessories


  • Acoustic cladding for the reduction of case-radiated noise
  • Secondary silencer Type TX for the reduction of air-regenerated noise
  • Hot water heat exchanger Type WT for reheating the airflow
  • Actuator for setpoint value switching or steady operation

General information

Application

  • Rectangular CAV terminal units for supply or extract air volume flow control in constant volume flow systems
  • Mechanical self-powered volume flow control without external power supply
  • Simplified project handling by ordering based on nominal size


Special features

  • Setting of the volume flow setpoint from the outside by rotary knob
  • High control accuracy of the set volume flow rate
  • Correct operation even under unfavourable upstream conditions
  • Visual display of the damper blade position for operating point optimisation
  • Easy retrofitting of an actuator for volume flow setpoint adjustment


Nominal sizes

  • 19 nominal sizes from 200 × 100 – 600 × 600 mm



Variants

  • EN: Air terminal units
  • EN-D: Air terminal units with acoustic cladding
  • Air terminal units with acoustic cladding and/or secondary silencer type TX for high acoustic requirements


Construction



  • Galvanised sheet steel
  • P1: Powder-coated, silver grey (RAL 7001)



Parts and characteristics

  • Air terminal unit ready for commissioning
  • Damper blade with low-friction bearings
  • Bellows for vibration damping
  • Cam plate with leaf spring
  • Rotary knob pointer and scale for adjusting the flow rate setpoint
  • Each air terminal unit is tested in the factory on a special ventilation test rig
  • Visual display of the damper blade position for operating point optimisation


Attachments

  • Min/Max actuators: Actuators for switching between minimum and maximum volume flow rate setpoint values
  • Variable actuators: actuators for variable volume flow or for switching volume flow setpoints
  • EN with actuator only up to H = 300 mm



Useful additions

  • Secondary silencer Type TX
  • Heat exchangers Type WT



Construction features

  • Rectangular casing
  • Flanges on both ends, suitable for duct connections
  • Air terminal units from H = 400 mm as double version (2 dampers with separate setting scales)
  • Acoustic cladding cannot be retrofitted


Materials and surfaces

Galvanised sheet steel construction



  • Casing and damper blade made of galvanised sheet steel
  • Leaf spring made of stainless steel
  • Polyurethane bellows
  • Plain bearings with PTFE coating
  • Cam plate and adjusting unit made of galvanised sheet steel


 



Powder-coated construction (P1)



  • Casing and damper blade made of galvanised sheet steel, powder-coated
  • Leaf spring made of stainless steel
  • Polyurethane bellows
  • Plain bearings with PTFE coating
  • Cam plate and adjusting unit made of galvanised sheet steel


 



Variant with acoustic cladding (-D)



  • Acoustic cladding made of galvanised sheet steel
  • Rubber seal for the insulation of structure-borne noise
  • Lining made of mineral wool


 



Mineral wool



  • Acc. to EN 13501, fire rating class A1, non-combustible

  • RAL quality mark RAL-GZ 388

  • Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008


Standards and guidelines

Meets the hygiene requirements of



  • EN 16798, Part 3
  • VDI 6022, Sheet 1
  • DIN 1946, Part 4
  • For further standards and guidelines, please refer to the hygiene certificate



Casing air leakage



  • EN 1751, Class C


Maintenance

Maintenance-free as construction and materials are not subject to wear



Technical information

Function Technical data, Quick sizing, Specification text, Order code

  • FUNCTION
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE
Schematic illustration of the EN EN3_gc_01.ai.png

① Damper blade

② Bellows

③ Bellows inlet

④ Scale sticker

⑤ Visual display of the damper blade position

⑥ Rotary knob

⑦ Actuator (optional)

Functional description

The air terminal unit is a mechanical self-powered unit and works without external power supply. A damper blade with low-friction bearings is adjusted by aerodynamic forces so that the set volume flow rate is kept constant within the differential pressure range. The aerodynamic forces of the airflow create a closing torque on the damper blade. An inflating bellows amplifies this force and at the same time acts as a damping element. The closing torque is countered by a leaf spring that unrolls over a cam plate. The cam plate is adapted in such a way that the damper blade moves when the differential pressure changes. As a result, the volume flow rate remains constant within narrow tolerances.

Efficient commissioning

Using the rotary knob, the desired volume flow setpoint can be set quickly on the external scale, no prior measurement required. The advantage over conventional flow adjustment dampers is that no repeated measurements or adjustments during commissioning are required. Should the system pressure change, e.g. by opening or closing of duct sections, the flow rates in the entire system will also change if flow adjustment dampers are used; however, this is not the case with mechanical self-powered air terminal units. The air terminal unit reacts immediately and keeps the set air volume constant.

 


 


Quick sizing tables provide a good overview of the room sound pressure levels that can be expected. The first selection criteria for the nominal size are the actual volume flow rates qᵥmin and qᵥmax. Intermediate values can be interpolated. Precise results and spectral data can be calculated with our Easy Product Finder design programme. The quick sizing tables are based on generally accepted attenuation levels. If the sound pressure level exceeds the required level, a larger air terminal unit and/or a silencer or acoustic cladding are required.

Quick sizing tables provide a good overview of the minimum differential pressures, the volume flow rate accuracy and the room sound pressure levels that can be expected. Intermediate values may be achieved by interpolation.
Exact results as well as spectral data for all control components are provided by the design with our Easy Product Finder design program. The first selection criteria for the nominal size are the actual volume flow rates qᵥmin and qᵥmax.


 


Volume flow rate ranges and minimum differential pressure values
The minimum differential pressure of VAV terminal units is an important factor in designing the ductwork and in rating the fan including speed control. It must be ensured that a sufficient differential pressure across the controller (Δpstat, min) is present under all operating conditions on all control units. The measurement points for fan speed control must be selected accordingly. The volume flow rates given for VAV terminal units depend on the nominal size and on the control component (attachment) that is installed.


 



Volume flow rate ranges and minimum differential pressure values


NS qv [l/s]qv [m³/h]Δpstmin [Pa]Δqv [±%]
200 x 1003914050717
200 x 10068246502211
200 x 10010437650518
200 x 100164590501255
300 x 1006523450913
300 x 10013749250398
300 x 10019971650826
300 x 100260936501405
300 x 1508229550515
300 x 150152547501710
300 x 150294105950646
300 x 1504601656501575
300 x 20012043250614
300 x 200197710501610
300 x 200349125750517
300 x 2005151854501115
400 x 20020072050912
400 x 200337121350278
400 x 200585210650806
400 x 2008753150501794
500 x 20018064850515
500 x 200271977501111
500 x 200554199550467
500 x 2009003240501225
600 x 20022581050515
600 x 2003811370501510
600 x 200689248050497
600 x 20010103636501065
400 x 25020072050614
400 x 2503331198501710
400 x 250537193250437
400 x 2508853186501175
500 x 25023584650515
500 x 250460165550209
500 x 250815293250646
500 x 25011904284501365
600 x 250300108050614
600 x 2504991795501710
600 x 250897323150547
600 x 25013104716501145
400 x 3003101116501012
400 x 300553199250328
400 x 300902324950856
400 x 30012804608501714
500 x 300365131450912
500 x 300535192850199
500 x 300998359350666
500 x 30015805688501664
600 x 300350126050614
600 x 300669240950219
600 x 3001137409450606
600 x 30017506300501425
400 x 400400144050912
400 x 400674242550278
400 x 4001170421250806
400 x 40017506300501794
500 x 400360129650515
500 x 400715257450199
500 x 4001330478750666
500 x 40018006480501225
600 x 400450162050515
600 x 400958344850249
600 x 4001595574150666
600 x 40020207272501065
500 x 500470169250515
500 x 5001143411350318
500 x 5001882677650856
500 x 50023808568501365
600 x 500600216050614
600 x 5001246448750268
600 x 5002084750350726
600 x 50026209432501145
600 x 600700252050614
600 x 6001948701450447
600 x 60029211051750995
600 x 600350012600501425

① Basic unit
② Basic unit with secondary silencer TX (to be considered additionally)



 


Quick sizing table sound pressure level


In the quick sizing are generally accepted attenuation and insulation values have been taken into account. If the sound pressure level exceeds the required level, a larger air terminal unit and/or a silencer is required. Further information on the acoustic data can be found in the basic information and nomenclature.


 



sound pressure level at differential pressure 150 Pa


NSqv [l/s]qv [m³/h]
200 x 1003914040232618
200 x 1006824644293123
200 x 10010437647343527
200 x 10016459050383831
300 x 1006523441262820
300 x 10013749247353528
300 x 10019971648383833
300 x 10026093649404136
300 x 1508229543263021
300 x 15015254747323527
300 x 150294105949364033
300 x 150460165650384438
300 x 20012043244293123
300 x 20019771047333629
300 x 200349125749374236
300 x 200515185451394641
400 x 20020072045303425
400 x 200337121347333931
400 x 200585210650374538
400 x 200875315053404943
500 x 20018064847293423
500 x 20027197748303727
500 x 200554199549334233
500 x 200900324050364538
600 x 20022581048283625
600 x 200381137048293929
600 x 200689248048324334
600 x 2001010363649334537
400 x 25020072044283223
400 x 250333119846303728
400 x 250537193248334133
400 x 250885318649364538
500 x 25023584647283524
500 x 250460165547303929
500 x 250815293247324234
500 x 2501190428447344437
600 x 250300108047293726
600 x 250499179547303930
600 x 250897323147324335
600 x 2501310471647344537
400 x 300310111644293527
400 x 300553199247334133
400 x 300902324950364639
400 x 3001280460852395043
500 x 300365131447303828
500 x 300535192848314031
500 x 300998359348334436
500 x 3001580568849354739
600 x 300350126047293726
600 x 300669240947304131
600 x 3001137409447324335
600 x 3001750630047344639
400 x 400400144045293728
400 x 400674242547334234
400 x 4001170421250374841
400 x 4001750630053405246
500 x 400360129647283726
500 x 400715257448314232
500 x 4001330478749344638
500 x 4001800648050364841
600 x 400450162048283928
600 x 400958344848304334
600 x 4001595574148324738
600 x 4002020727249334840
500 x 500470169247283827
500 x 5001143411347314334
500 x 5001882677647334538
500 x 5002380856847344740
600 x 500600216047294029
600 x 5001246448747314435
600 x 5002084750347324739
600 x 5002620943247344840
600 x 600700252047294029
600 x 6001948701447314637
600 x 60029211051747334840
600 x 60035001260047344942

Air-regenerated noise

① Basic unit
② Basic unit with secondary silencer TX

Case-radiated noise
③ Basic unit
④ Basic unit with acoustic cladding



 

Specification text

Air terminal units in rectangular design for constant air volume systems, mechanically self-powered, without external power supply, for supply or extract air, in 19 nominal sizes.

Air terminal unit ready for commissioning. Unit consists of the casing with damper blade with low friction bearings, bellows, and external cam plate with leaf spring. The air terminal units are factory adjusted and preset to a reference air volume. Sound power level measured according to DIN EN ISO 5135. Meets the hygiene requirements according to VDI 6022.



Special features

  • Setting of the volume flow setpoint from the outside by rotary knob
  • High control accuracy of the set volume flow rate
  • Correct operation even under unfavourable upstream conditions
  • Visual display of the damper blade position for operating point optimisation
  • Easy retrofitting of an actuator for volume flow setpoint adjustment




Materials and surfaces


Galvanised sheet steel construction


  • Casing and damper blade made of galvanised sheet steel
  • Leaf spring made of stainless steel
  • Polyurethane bellows
  • Plain bearings with PTFE coating
  • Cam plate and adjusting unit made of galvanised sheet steel

 


Powder-coated construction (P1)


  • Casing and damper blade made of galvanised sheet steel, powder-coated
  • Leaf spring made of stainless steel
  • Polyurethane bellows
  • Plain bearings with PTFE coating
  • Cam plate and adjusting unit made of galvanised sheet steel

 


Variant with acoustic cladding (-D)


  • Acoustic cladding made of galvanised sheet steel
  • Rubber seal for the insulation of structure-borne noise
  • Lining made of mineral wool

 


Mineral wool


  • Acc. to EN 13501, fire rating class A1, non-combustible

  • RAL quality mark RAL-GZ 388

  • Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008





Construction



  • Galvanised sheet steel
  • P1: Powder-coated, silver grey (RAL 7001)





Technical data


  • Nominal sizes: 200 × 100 to 600 × 600 mm
  • Volume flow rate range: 39 – 3500 l/s or 140 – 12600 m³/h
  • Volume flow rate control range: approx. 25 – 100 % of the nominal volume flow rate
  • Minimum differential pressure: 50 Pa
  • Maximum permissible differential pressure: 1000 Pa
  • Casing air leakage acc. to EN 1751, class C





Sizing data

  • qᵥ [m³/h]
  • Δpst [Pa]

Air-regenerated noise

  • LPA [dB(A)]

Case-radiated noise

  • LPA [dB(A)]


ENDP1 / 400 × 200 / E01 / 800 – 3000 [m³/h]
||||||
123456
1 Type
EN Air terminal unit 


2 Acoustic cladding
No entry: none
D with acoustic cladding 

3 Material
No entry: galvanised sheet steel
P1 Powder-coated RAL 7001 (silver grey) 

4 Nominal size [mm]
B × H 

5 Actuator for setpoint adjustment
No entry: none
E01 24 V AC/DC, 3-point (min/max), potentiometer
E02 230 V AC, 3-point (min/max), potentiometer
E03 24 V AC/DC, modulating 0 – 10 V DC, potentiometer

    

Variants, Product details

  • VARIANTS
  • PRODUKT DETAILS

  • Air terminal units for constant air volume flow control

,

  • Air terminal units with acoustic cladding for constant air volume flow control
  • For rooms in which the case-radiated noise of the unit is not sufficiently reduced by a suspended ceiling
  • The rectangular ducts for the room under consideration must have adequate acoustic insulation (provided by others) on the fan and room ends
  • Acoustic cladding cannot be retrofitted

Installation and commissioning

  • Installation with horizontal air flow: Do not point the operating side (setting scale, rotary knob or optional actuator) upwards
  • Setting of the volume flow setpoint from the outside by rotary knob
  • Loosen and lock the rotary knob with hexagon socket screw
  • No repeated measuring or re-adjusting required during commissioning
  • EN-D: For constructions with acoustic cladding, ducts on the room side should have cladding up to the acoustic cladding of the air terminal unit

Upstream conditions


The volume flow rate accuracy Δqvapplies to a straight upstream section of the duct. Fittings such as bends, junctions, or changes in cross-section cause turbulence that can influence the volume flow accuracy. Duct connections, e.g. branches off the main duct, must comply with EN 1505. Free air intake only with 1.5B or 1.5H straight upstream length.


 


Space required for commissioning and maintenance


To enable commissioning and maintenance work, keep sufficient installation space clear in the area of the operating side (setting scale, rotary knob, optional attachment parts). It may be necessary to provide sufficiently sized inspection openings to make sure the attachments are easily accessible.


 


 


 


 


 

References

Hypercube - Moscow

  • Description
Project:
- Hypercube

Field of application:
- Office Building
 
Location:
- Moscow, Russia 
 
TROX-Products:
- Air-water-Systems: Multi-Service-Chilled-Beams, DID312, DID632
- Air diffusor: SL-A, TRS
- Acoustics: CA, MSA
- Control Units: TVJD-Easy, EN-D, VFR

Downloads

product information

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