TVA

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Easy controller, Compact controller

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TROX UNIVERSAL controller,

TROX LABCONTROL controller

Circular connection on the fan end

Rectangular connection on the room end

Tested to VDI 6022

TVA

For extract air systems with demanding acoustic requirements

VAV terminal units for extract air control in buildings with variable air volume systems and demanding acoustic requirements
■ Highly effective integral attenuator
■ Box style construction for the reduction of the airflow velocity
■ Electronic control components for different applications (Easy, Compact, Universal, and LABCONTROL)
■ Closed blade air leakage to EN 1751, up to class 4
■ Casing air leakage to EN 1751, up to class C

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

Rectangular VAV terminal units for use in ventilation and air conditioning systems
For control, inductor and shut-off tasks in the extract air area with high acoustic requirements
Integral attenuator
Closed-loop volume flow control using an external power supply
For variable or constant volume flow systems
Shut-off via override control by others
Can also be used for duct or room pressure control with suitable control components

Special characteristics

Integral attenuator with at least 26 dB insertion loss at 250 Hz
Hygiene tested and certified
Factory set-up or programming and aerodynamic function testing
Setting and subsequent parameterisation on the control component possible, separate setting device may be required

Nominal sizes

125, 160, 200, 250, 315, 400

Variants

TVA: Extract air unit
TVA-D: Extract air unit with acoustic cladding
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 sensor for volume flow rate measurement
Damper blade
Integral attenuator
Factory assembled control components complete with wiring and tubing
Aerodynamic functional testing on a special test rig prior to shipping of each unit
Set-up data is given on a label or volume flow rate scale affixed to the unit
High control accuracy even in case of unfavourable upstream conditions

Attachments

EASY controller: Compact unit consisting of controller with potentiometers, effective pressure transducer and actuator
Compact controller: Compact unit consisting of controller with potentiometers, effective pressure transducer and actuator
Universal controllers: Controllers, differential pressure transducers and actuators for special applications
LABCONTROL: Control components for air management systems

Accessories

Double lip seal (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)

Material 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 protection against erosion through 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, Sheet 1
DIN 1946, Part 4
Further standards, guidelines in accordance with hygiene certificate

Casing leakage:

NS 125 – 200
EN 1751, Class C
NS 250 – 400
EN 1751, Class B

Closed blade air leakage:

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

Maintenance

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

Disclosure of Chemicals

RoHS EU Directive 2011/65/EU (RoHS)This product or individual variants comply with EU Directive 2011/65/EU (RoHS) on the restriction of the use of certain hazardous substances in electrical and electronic equipment. For more information, please refer to our Environmental Product Declarations. REACH 1907/2006 (EC Regulation REACH)This product or individual variants comply with the provisions of EC Regulation No. 1907/2006, also known as REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals). For more information, please refer to our Environmental Product Declarations

Technical information

1 Integral sound attenuator
2 Double lip seal
3 Damper blade
4 Effective pressure sensor
5 Control components, e.g. an Easy controller

The VAV terminal unit is fitted with an effective pressure sensor for measuring the volume flow rate. The control components (attachments) include an effective pressure transducer that transforms the effective pressure into an electric signal, a controller, and an actuator; the control functions can be achieved with an Easy controller or with a Compact controller or with individual components (Universal or LABCONTROL). For most applications, the setpoint value comes from a room temperature controller. The controller compares the actual value with the setpoint value and alters the control signal of the actuator if there is a difference between the two values. An integral attenuator reduces the noise that is created by the restriction of the airflow. Due to the larger rectangular cross section at the room end, the airflow velocity is about half the velocity in the circular duct.

Nominal sizes	125 – 400 mm
Volume flow rate range	14 – 2007 l/s or 50 – 7228 m³/h
Volume flow rate control range (unit with dynamic effective pressure measurement)	Approx. 10 – 100 % of the nominal volume flow rate
Minimum differential pressure	Up to 258 Pa (without circular silencer)
Maximum differential pressure	1000 Pa
Operating temperature	10 to 50 °C

This specification text describes just one variant of the product and applies to many applications. Texts for variants can be generated with our Easy Product Finder design program.

Application

Rectangular VAV terminal units for variable and constant air volume systems, suitable for extract air, available in 6 nominal sizes. High volume flow rate control accuracy. Ready-tocommission

unit which consists of the mechanical parts and the electronic control components Each unit contains an averaging effective pressure sensor for volume flow rate measurement, a

damper blade, and an integral sound attenuator. Factoryassembled control components complete with wiring and tubing. Effective pressure sensor with 3 mm measuring holes, hence resistant to contamination. Baffle plate is fitted after the damper blade for optimum acoustic and aerodynamic performance. Casing with acoustic and thermal insulation. Position of the damper blade indicated externally at shaft extension. Damper blade is supplied open so that the air flow will be ensured, even without the control function, except variants with defined safe position NC (normally closed). Meets the hygiene requirements of EN 16798, Part 3, of VDI 6022, Sheet 1, and of DIN 1946, Part 4.

Special features

Integral attenuator with at least 26 dB insertion loss at 250 Hz
Hygiene tested and certified
Factory set-up or programming and aerodynamic function testing
Setting and subsequent parameterisation on the control component possible, separate setting device may be required

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

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 type

Fan side spigot with groove for lip seal, suitable for connecting ducts according to EN 1506 or EN 13180. Room end suitable for the connection of ducts.

Technical data

Nominal sizes: 125 to 400 mm
Volume flow rate range: 14 – 1602 l/s or 50 – 5768 m³/h
Minimum differential pressure: Up to 258 Pa
Maximum differential pressure: 1000 Pa
Closed blade air leakage to EN 1751, Class 4
Casing air leakage according to EN 1751, Class C (nominal sizes 125 - 250, Class B)

Equivalence criteria

Declaration of hygiene conformity in accordance with VDI 6022, Sheet 1 (01/2018), ÖNORM H 6020 (02/2007) and ÖNORM H 6021 (09/2003)
Setting the volume flow rates without adjustment device via Vmin- and Vmax- potentiometer
Electrical connections with screw terminals, no additional terminal boxes required
Aerodynamic functional testing of each volume flow controller on test rigs at the factory, before a label is affixed to the controller
Acoustic data measured to ÖNORM EN ISO 5135:1999

Specification text attachment

Variable volume flow control with electronic Easy controller to connect an external control signal; actual value signal can be integrated into the central BMS.

Supply voltage 24 V AC/DC
Signal voltages 0 – 10 V DC
Possible override controls with external switches using voltfree contacts: CLOSED, OPEN, qᵥmin and qᵥmax
Potentiometers with percentage scales to set the volume flow rates qᵥmin and qᵥmax without adjustment device
The actual value signal relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified
Volume flow rate control range: approx. 10 – 100 % of the nominal volume flow rate
Clearly visible external indicator light for signalling the functions: Set, not set, and power failure
Electrical connections with screw terminals
Double terminals for looping the supply voltage, i.e. for the simple connection of voltage transmission to the next controller

Sizing data

qᵥ [m³/h]
Δpst [Pa]

Air-regenerated noise

LPA [dB(A)]

Case-radiated noise

LPA [dB(A)]

Order code for volume flow control (with Easy controller)

TVA	–	D	/	160	/	D1	/	Easy
\|		\|		\|		\|		\|
1		2		3		4		5

1 Type
TVA VAV terminal unit, extract air

2 Acoustic cladding

No entry: none

D with acoustic cladding

3 Nominal size [mm]
125, 160, 200, 250, 315, 400

4 Accessories
No entry: none

D1 Double lip seal (one end)

5 Attachments (control component)

Easy Volume flow controller, dynamic, analogue interface, setting of qᵥmin and qᵥmax with potentiometers (provided on site)

Order example: TVA-D/400/Easy

Acoustic cladding	Yes
Nominal size	400 mm
Attachments (control units)	Easy controller, dynamic, analogue interface, Adjustment q_vmin and q_vmax with potentiometers

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TVA

For extract air systems with demanding acoustic requirements

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For extract air systems with demanding acoustic requirements

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