TVM_img_09psd.png
VAV dual duct terminal unit, variant TVM

  • VAV terminal unit for the control of variable supply air volume flows
  • Connecting spigots for warm and cold air arranged at an angle of 90°

TVM_img_11psd.png
Circular connection on the fan end

Circular connection on the fan end

TVM_img_12psd.png
Variant TVM-S

Variant TVM-S

00075106_0psd.psd.link
Rectangular connection on the room end

Rectangular connection on the room end

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Tested to VDI 6022

Tested to VDI 6022

TVM_img_09psd.png
TVM_img_11psd.png
TVM_img_12psd.png
00075106_0psd.psd.link
00073144_0ai.ai.link

TVM

For dual duct systems


 

VAV dual duct terminal units for dual duct systems with variable volume flows in buildings with demanding acoustic requirements

  • Individual temperature control for each room or zone
  • Highly effective integral attenuator
  • Electronic control components for various applications
  • Closed blade air leakage to EN 1751, up to class 4
  • Casing leakage to EN 1751, Class B

 

 

Optional equipment and accessories

  • Acoustic cladding for the reduction of case-radiated noise
  • Secondary silencer Type TS for the reduction of air-regenerated noise

 

 

 


General information

Application

  • VAV dual duct terminal unit for use in ventilation and air conditioning systems
  • Supply air control in dual-duct volume flow systems
  • Closed-loop volume flow control using an external power supply
  • For maximum acoustic and thermal comfort
  • Demand-based mixing of cold and warm air
  • Shut-off by means of switching (by others)



Special features

  • Integral effective pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
  • Integral attenuator with at least 26 dB insertion loss at 250 Hz
  • Factory set-up or programming and aerodynamic function testing
  • Volume flow rate can later be measured and adjusted on site; additional adjustment device may be necessary
  • Inspection access according to VDI 6022



Nominal sizes

  • TVM-S: 125, 160, 200
  • TVM: 125, 160, 200, 250, 315, 400



Variants

  • TVM-S Dual duct unit, 60° spigot arrangement
  • TVM-S-D Dual duct unit with acoustic cladding, 60° spigot arrangement
  • TVM: Dual duct unit, 90° spigot arrangement
  • TVM-D: Dual duct unit with acoustic cladding, 90° spigot arrangement
  • Units with acoustic cladding and/or secondary silencer Type TS for very demanding acoustic requirements
  • Acoustic cladding cannot be retrofitted



Parts and characteristics

  • Ready-to-commission unit which consists of mechanical parts and control components
  • Averaging effective pressure sensors for volume flow rate measurement, one in the cold air flow and in the total air flow respectively
  • Damper blade
  • Integral attenuator
  • Inspection access
  • Factory-mounted control components complete with wiring and tubing
  • Aerodynamic functional testing on a special test rig before shipping of each unit
  • Set-up data is given on a label affixed to the unit
  • High control accuracy (even with upstream bend R = 1D)


Attachments

  • Compact controller: Compact unit consisting of controller with potentiometers, effective pressure transducer and actuator



Accessories

  • Double lip seals (factory-fitted)



Useful additions

  • Secondary silencer Type TS



Construction features

  • Rectangular casing
  • Spigot on the fan end suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for double lip seal
  • Connection on the room end suitable for ducts
  • Baffle plate is fitted after the damper blade for optimum aerodynamic performance
  • Position of the damper blade indicated externally at shaft extension
  • Thermal and acoustic insulation (lining)



Materials and surfaces

  • Casing and damper blade made of galvanised sheet steel
  • Damper blade seal made of TPE plastic
  • Lining is mineral wool
  • Effective pressure sensor made of aluminium
  • Plastic plain bearings
  • Shaft and linkage made of galvanised steel


Variant with acoustic cladding (-D)

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


Mineral wool

  • To EN 13501, fire rating class A1, non-combustible
  • RAL quality mark RAL-GZ 388
  • Non-hazardous to health thanks to being highly biosoluble in accordance with the Ordinance on Hazardous Substances and Note Q of the European Directive (EC) No. 1272/2008
  • Faced with glass fibre fabric as a protection against erosion from airflow velocities of up to 20 m/s
  • Inert to fungal and bacterial growth


Standards and guidelines

Fulfils the hygiene requirements of

  • EN 16798, Part 3
  • VDI 6022
  • DIN 1946, Part 4
  • Further standards, guidelines in accordance with hygiene certificate

Casing leakage

  • EN 1751, Class B

Closed blade leakage
Nominal sizes 125 and 160

  • EN 1751, Class 3
  • Fulfilment of the general requirements of DIN 1946, Part 4, with regard to the acceptable closed blade air leakage

Nominal sizes 200 to 400

  • EN 1751, Class 4
  • Fulfilment of the increased requirements of DIN 1946, Part 4, with regard to the acceptable closed blade air leakage


Maintenance

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


Technical information

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

  • FUNCTION
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE
  • RELATED PRODUCTS

The VAV terminal unit is fitted with two effective pressure sensors for measuring the volume flow rates, one in the cold air flow and one in the total air flow. The control components (attachments) include two effective pressure transducers that transform the effective pressure into an electric signal, two controllers, and two actuators; as Compact controller or with individual components. In most cases, the setpoint value for the dual duct terminal unit comes from a room temperature controller. The room temperature controller administers the cold air volume flow controller and indicates the setpoint value for the cold air flow rate between 0 and a maximum volume flow qᵥmax. The controller compares the actual value with the setpoint value and alters the control signal of the damper actuator if there is a difference between the two values. The warm/overall


controller is set to the minimum volume flow rate qᵥmin and controls the damper blade in the heat duct. As a consequence, a corresponding proportion of warm air is added. As the demand for cooling increases, the warm air damper blade closes such that eventually only cold air flows. An integral attenuator reduces the noise that is created by the restriction of the airflow. The airflow velocity at the room end is, due to the larger rectangular cross section, about half the velocity in the circular duct.


 

Volume flow rate range

50 – 2108 l/s or 210 – 7591 m³/h

Volume flow rate control rangeApprox. 30 to 100 % of the nominal volume flow rate
Minimum differential pressure

Up to 202 Pa (without secondary silencer TS)

Maximum differential pressure1000 Pa
Operating temperature10 to 50 °C


 


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.

The sound power levels for calculating the sound pressure levels were measured in the TROX laboratory according to DIN EN ISO 5135 - see "Basic information and nomenclature".

Precise results and spectral data for all control components can be calculated 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. A sufficient pressure differential must be ensured under all operating conditions across the regulator (Δpt,min) for all terminal 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

Control component dynamic measurement principle - qv Extended
Attachment BC0, BM0, BM0-J6


NSqv [l/s]qv [m³/h]Δpstmin [Pa]Δqv [±%]
1255921019249
12510437358766
1251495361191565
1251946992022654
16010136320279
16017161657766
1602418691121515
16031111221872515
20015254517289
20027097354876
20038914001121795
20050718281903054
25021376515249
250398143451837
25058421021081785
25076927711883105
3153101115111610
315633227846667
31595634401041505
315127846031862694
4005011803111410
4001037373246597
400157356621061355
400210875911902434

① Basic unit
② Basic unit with secondary silencer TS


Volume flow rate ranges and minimum differential pressure values
Control component dynamic measurement principle - q v As standard
Attachment XB0, LN0, LK0


NSqv [l/s]qv [m³/h]Δpstmin [Pa]Δqv [±%]
1255921019249
1259333346607
125126455861126
1251605781391815
16010136320279
16015355145617
160206740821096
1602579281281725
20015254517289
20024186743697
2003311190811306
20042015121302095
25021376515249
250354127440667
2504951783781286
25063622921292125
3153101115111610
315559201236527
3158082910751086
315105738071271845
4005011803111410
400915329536467
4001330478776976
400174462791301665

① Basic unit
② Basic unit with secondary silencer TS

 


Quick sizing table for sound pressure levels


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 is required. For more information on the acoustic data, see basic information and nomenclature.


Quick sizing table for air-regenerated noise LPA
Controller including sound attenuator variants
(Total flow rate range of the type)

NSqv [l/s]qv [m³/h]250 Pa500 Pa
1255921027173020
12510437334243726
12514953639284130
12519469942n.V.4433
16010136329193323
16017161635253929
16024186939294232
160311112242n.V.4534
20015254527173121
20027097331213525
200389140035253828
200507182838n.V.4130
25021376517< 1520< 15
250398143426162818
250584210231223323
250769277135n.V.3728
315310111518< 1521< 15
315633227828173119
315956344034233724
3151278460339n.V.4127
400501180315< 1517< 15
4001037373227162917
4001573566234253625
4002108759140n.V.41n.V.

Air-regenerated noise LPA [dB(A)] in the case of total differential pressure Δpt of 250 or 500 Pa

① Basic unit

② Basic unit with secondary silencer TS


n.a.: specified total differential pressure Δpt is lower than the minimum differential pressure Δpt,min

 Quick sizing table for case-radiated noise LPA

Controller including acoustic cladding variant
(Total flow rate range of the type)

NSqv [l/s]qv [m³/h]250 Pa500 Pa
1255921032243829
12510437336294234
12514953640324537
12519469943364840
16010136341324738
16017161644364942
16024186946395144
160311112248425347
20015254536284233
20027097340344638
200389140044384942
200507182847425245
25021376529233428
250398143435294134
250584210240344538
250769277144384841
315310111537314438
315633227841374843
315956344044415047
3151278460347455250
400501180330263732
4001037373238334439
4001573566243384843
4002108759147435147

Case-radiated noise LPA [dB(A)] in the case of total differential pressure Δpt of 250 or 500 Pa

① Basic unit

② Basic unit with acoustic cladding

n.a.: specified total differential pressure Δpt is lower than the minimum differential pressure Δpt,min

Note:
Information on case-radiated noise for combinations of basic unit and optional acoustic cladding and secondary silencer can be found in the Easy Product Finder design program.


Specification text

Rectangular VAV dual duct terminal units for dual duct systems with variable and constant volume flows, available in 6 nominal sizes. Connecting spigots for warm and cold air arranged at an angle of 90°. Up to nominal size 200, an angle of 60° is also possible and is therefore ideal for the refurbishment of older systems with dual duct units. High control accuracy (even with upstream bend R = 1D). Ready-to-commission unit which consists of the mechanical parts and the electronic control components. Each unit contains two averaging effective pressure sensors for volume flow rate measurement, one in the cold air flow and one in the total air flow, two damper blades, and an integral sound attenuator. Factory-mounted control components complete with wiring and tubing. Effective pressure sensor with 3 mm measuring holes, hence resistant to contamination. Spigot on the fan end with groove for double lip seal, suitable for ducts according to EN 1506 or EN 13180. Room end suitable for the connection of flanges. Two baffle plates, one fitted after each damper blade for optimum acoustic and aerodynamic performance. Casing with acoustic and thermal insulation. Position of the damper blade can be seen from the outside at the shaft extension. Closed blade air leakage to EN 1751, class 4 (nominal sizes 125 and 160, class 3). Casing leakage according to EN 1751, class B. Meets the hygiene requirements of VDI 6022, EN 16798, Part 3, VDI 3803 as well as  DIN 1946 Part 4.


Special features

  • Integral effective pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
  • Integral attenuator with at least 26 dB insertion loss at 250 Hz
  • Factory set-up or programming and aerodynamic function testing
  • Volume flow rate can later be measured and adjusted on site; additional adjustment device may be necessary
  • Inspection access according to VDI 6022


Materials and surfaces


  • Casing and damper blade made of galvanised sheet steel
  • Damper blade seal made of TPE plastic
  • Lining is mineral wool
  • Aluminium sensor tubes
  • Plastic plain bearings
  • Shaft and casing made of galvanised steel

Mineral wool:

  • To EN 13501, fire rating class A1, non-combustible
  • RAL quality mark RAL-GZ 388
  • Non-hazardous to health thanks to being highly biosoluble in accordance with the Ordinance on Hazardous Substances and Note Q of the European Directive (EC) No. 1272/2008
  • Faced with glass fibre fabric as protection against erosion through airflow velocities of up to 20 m/s
  • Inert to fungal and bacterial growth


Connection

  • Spigot with groove for double lip seal, suitable for ducts according to EN 1506 or EN 13180
  • Room end suitable for the connection of flanges
     


Technical data

  • Nominal sizes: 125 to 400 mm
  • Volume flow rate range: 59 – 2108 l/s or 210 – 7591 m³/h
  • Volume flow rate control range: approx. 30 – 100 % of the nominal volume flow rate
  • Minimum differential pressure: up to 202 Pa (without secondary silencer TS)
  • Maximum differential pressure: 1000 Pa



Specification text for attachment

Variable volume flow control with electronic Compact controller to switch an external control signal and an actual value signal for integration into the central BMS.

  • Supply voltage 24 V AC/DC
  • Signal voltages 0 – 10 V DC or 2 – 10 V DC
  • Possible override controls with external, volt-free switches: CLOSE, OPEN, qᵥmin and qᵥmax
  • Volume flow rate control range: approx. 30 – 100 % of the nominal volume flow rate
Sizing data

    • qᵥwarm,min – qᵥwarm,max (m³/h)
    • qᵥcold,min – qᵥcold,max (m³/h)
    • Δpt Total differential pressure [Pa]
    • LPA Air-regenerated noise [dB(A)]
    • LPA Case-radiated noise [dB(A)]


Order code for volume flow control (with VARYCONTROL attachment)
TVMSD / 160 / D2 / BC0 / V0 / 400 – 900 / 0 – 900 [m³/h]
|||||||||
123456789
1 Type
TVM Dual duct terminal unit
 
2 Spigot arrangement
No entry required: 90°
S 60° (only up to nominal size 200)
 
3 Acoustic cladding
No entry required: none
D With acoustic cladding
 
4 Nominal size [mm]
125, 160, 200, 250, 315, 400
 
5 Accessories
No entry required: none
D2 Double lip seal
 
 
6 Attachments (control component)
BC0 Compact controller, analogue/MP bus interface
BM0 Compact controller, Modbus/BACnet
BM0-J6 Compact controller, Modbus/BACnet (RJ12)
LN0 Compact controller, analogue interface
LK0 Compact controller, KNX interface
XB0 Compact controller, analogue interface
 
7 Operating mode
V Variable (setpoint value range)
 
8 Signal voltage range
For the actual and setpoint value signals
0 0 – 10 V DC
2 2 – 10 V DC
 
9 Operating values for factory setting
Volume flow rates [m³/h or l/s]
qᵥwarm,min – qᵥwarm,max / qᵥcold,min – qᵥcold,max


Order example: TVM/160/BC0/V0/750–1122 m³/h/0–1122 m³/h
Spigot arrangement90°
Acoustic claddingNone
Nominal size160 mm
Attachments (control component)Compact controller
Operating modeVariable
Signal voltage range0 – 10 V DC
Operating values warmqᵥwarm,min = 750 m³/hqᵥwarm,max = 1122 m³/h
Operating values coldqᵥcold,min = 0 m³/hqᵥcold,max = 1122 m³/h

Variants, Attachments, Dimensions and weight, Product details

  • VARIANTS
  • DIMENSIONS AND WEIGHT
  • PRODUKTDETAILS

Material

Standard construction

Order code detailPartMaterial
CasingGalvanised sheet steel
Effective pressure sensor (cold)Aluminium tube
Effective pressure sensor (total)Aluminium
Damper bladeGalvanised sheet steel
Damper blade sealThermoplastic elastomer (TPE)
Shaft and linkageGalvanised steel
Plain bearingsThermoplastic elastomer (TPE)


With acoustic cladding (optional)

Order code detailPartMaterial
DLiningMineral wool to EN 13501, fire rating class A1, non-combustible
Acoustic cladding casingGalvanised sheet steel
Insulation of structure-borne noisePolyethylene, PE


Option double lip seal

Order code detailPartMaterial
D2Double lip sealRubber, EPDM

Dimensions/weight for TVM

NSBHL∅DAA₁B₁B₃CC₁H₁H₃L₁Wkg
1251981521355124150170232300125240186236120526528
1603081521455159200150342410145295186236125526534
2004582101790199200125492560170350244281159026550
2505982012015249250160632700200415235311176554065
3157982522090314250130832900240535286361184054090
400898354257539925018093210002906253884462325540130

Dimensions/weight for (TVM-D)

NSBHL∅DAA₁B₁B₃CC₁H₁H₃L₁Wkg
1251981521355124110130232380165280186316124530542
1603081521455159160110342490185335186316129530551
200458210179019916085492640210390244361163030578
25059820120152492101206327802404552353911805580105
3157982522090314210908329802805752864411880580140
400898354257539921014093210803306653885262365580200

Dimensions/weight for (TVM-S)
NSBHL∅DAB₁B₃B₄H₁H₃L₁Wkg
1251981521385124245232300525186236119017330
1603081521630159335342410690186236136017335
2004582101920199340492560800244281166017350


Dimensions/weight for (TVM-S-D)

NSBHL∅DAB₁B₃B₄H₁H₃L₁Wkg
1251981521385124225232380525186316121516045
1603081521630159295342490690186316141018055
2004582101920199300492640800244361171018080


Installation and commissioning

  • Horizontal (return edges of the casing with suspension holes at the top) and vertical installation orientation
  • Spigots for warm and cold air arranged at an angle of 60° (TVM-S) or 90° (TVM)
  • Return edges of the casing with drilled holes suitable for threaded rods


Upstream conditions

The volume flow rate accuracy Δqᵥ applies to a straight upstream section of the duct. Bends, junctions or a narrowing or widening of the duct cause turbulence that may affect measurement. Duct connections, e.g. branches off the main duct, must comply with EN 1505. Some installation situations require straight duct sections upstream. The upstream conditions apply primarily to the duct connection at the cold air spigot. Since the hot air spigot does not contain a sensor, the upstream section here has no effect on the volume flow rate accuracy; however, unfavourable upstream sections can also lead to increased sound pressure levels.


VARYCONTROL control components

Attachment Controlled variable Interface Effective pressure transducer Actuator Manufacturer
Compact controller, dynamic
BC0

qv

0 – 10 V or 2 – 10 V or MP bus interface integral Slow running

integral
LN0

qv

0 – 10 V or 2 – 10 V integral Slow running

integral
LK0

qv



KNX interface


integral Slow running

integral
XB0

qv

0 – 10 V or 2 – 10 V integral Slow running

integral
BM0

qv



Modbus RTU/BACnet MS/TP


integral Slow running

integral
BM0-J6

qv



Modbus RTU/BACnet MS/TP with RJ12 socket (for X-AIRCONTROL)


integral Slow running

integral

qv Volume flow rate
② TROX/Belimo, ③ TROX/Gruner, ⑤ Siemens; note restricted availability. LN0 and LK0 not available for variant TVM-S-D


Downloads

product information

certificates

operation manuals

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