TROX TVT rectangular variable air volume terminal with controller

TROX TVT VAV damper actuators and control modules

TROX TVT VAV terminal electronic control modules

TROX TVT close-up of damper blade inside rectangular VAV terminal

TROX TVT rectangular VAV terminal with mounted controller

VDI 6022 hygiene certification badge for TROX TVT

TROX TVT – Rectangular VAV Terminal for Normal & High Flow Rates with Low Leakage Shut-Off

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For normal and high volume flow rate ranges and lowleakage shut-off

Rectangular air terminal units for standard applications in supply air or extract air systems with variable volume flow rates, suitable for low-leakage shut-off

For volume flow rate ranges up to 16976 cfm
Suitable for the control of volume flow rate, room pressure or duct pressure
Electronic control components for different applications (Easy, Compact, Universal, and LABCONTROL)
High control accuracy
Closed blade air leakage to EN 1751, class 3
Casing air leakage to EN 1751, up to class COptional 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 of Type WT for reheating the airflow

Type

Material 3: mode

Acoustic cladding

Material

Nominal size [in] B x H

Attachments (control components)

Equipment function/Installation location

Actuators

Operating mode

Differential pressure setting

Volume flow rate setting

Signal voltage range

External volume flow rate setting

Expansion modules - Option 1: Power supply

Expansion modules - Option 2: Digital communication interface

Expansion modules - Option 3: Automatic zero point correction

Expansion modules - Option 4: Automatic zero point correction

Additional functions

Operating values for factory setting

Damper blade position

Useful Additions

SKU: TVT Category: Variable Air Volume Regulators (VAV) Tag: TVT

General Information

Application

Rectangular VAV terminal units for use in ventilation and air conditioning systems
For controlling, restricting, or shutting off supply and extract air flows
Closed-loop volume flow control using an external power supply
For variable or constant volume flow systems
Shut-off by means of switching (equipment supplied by others)
Can also be used for duct or room pressure control with suitable control components

Special characteristics

Integral effective pressure sensor with 0.1 in measuring holes (resistant to dust and pollution)
Factory set-up or programming and aerodynamic function testing
Parameters can also later be set on the control component.
Depending on the control component, an additional adjustment device may be necessary

Nominal sizes

36 nominal sizes from 8 × 4 in to 40 × 24 in
Not all attachments may be available or suitable for all sizes of terminal units

Variants

TVT: VAV terminal unit
TVT-D: VAV terminal unit with acoustic cladding
Units with acoustic cladding and/or secondary silencer Type TX for demanding acoustic requirements
Acoustic cladding cannot be retrofitted

Construction

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

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 blades
Factory assembled 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 or volume flow rate scale affixed to the unit
High volume flow rate control accuracy

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 controller: controller, effective pressure transducer, and actuators for special applications
LABCONTROL: Control components for air management systems

Useful additions

Secondary silencer Type TX for demanding acoustic requirements
Heat exchanger Type WT

Construction features

Rectangular casing
Flanges on both ends, suitable for duct connection
Opposed blade action, blades connected by internal gears (enclosed) at both ends
Damper blades with replaceable seals
Position of the damper blade indicated externally at shaft extension
Bearings with ring seals

Material and surfaces

Galvanised sheet steel construction

Casing made of galvanised sheet steel
Shaft and linkage made of galvanised steel
Damper blades and effective pressure sensor made of aluminium
Gears made of anti-static plastic (ABS), temperature resistant to 122 °F
Plastic plain bearings

Powder-coated construction (P1)

Casing made of galvanised sheet steel, powder-coated

Variant with acoustic cladding (D)

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

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

Standards and guidelines

Fulfils the hygiene requirements of

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

Casing leakage

EN 1751, Class C; if B + H ≤ 16 in, Class B

Closed blade air leakage

EN 1751, Class 3
Meets the general 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

Disclosure of Chemicals

RoHS EU Directive 2011/65/EU (RoHS)This product or single 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 single 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.

Function

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.

Schematic Illustration of the TVT

① Effective pressure sensor
② Damper blade with seal
③ Gears
④ Control components, e.g. an Easy controller

Specification Text

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

Specification text

Rectangular VAV terminal units for variable and constant air volume systems, suitable for supply or extract air, available in 36 nominal sizes. High volume flow rate control accuracy.

Ready-to-commission 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 and damper blades. Factory mounted control components complete with wiring and tubing Effective pressure sensor with 0.1 in measuring holes, hence resistant to contamination. Position of the damper blades indicated externally at the shaft extension. The damper blade is factory set to open position, which allows a ventilation airflow even without control; this does not apply to variants with defined safe position NC (normally closed).

Special features

Integral effective pressure sensor with 0.1 in measuring holes (resistant to dust and pollution)
Factory set-up or programming and aerodynamic function testing
Parameters can also later be set on the control component.
Depending on the control component, an additional adjustment device may be necessary

Materials and surfaces

Casing made of galvanised sheet steel
Shaft and linkage made of galvanised steel
Damper blades and differential pressure sensor made of aluminium
Gears made of anti-static plastic (ABS), resistant to temperatures up to 122 °F
Plastic plain bearings

Connection type

Flanges on both ends, suitable for duct connection

Technical data

Nominal sizes: 8 × 4 in to 40 × 24 in
Volume flow rate range: 88 – 12454 cfm
Minimum differential pressure: up to 0.42 in WG
Maximum differential pressure: 4.01 in WG
Closed blade air leakage to EN 1751, class 3
Casing air leakage to EN 1751, class C (B + H ≤ 16 in, class B)

Equivalence criteria

Declaration of hygiene conformity according to VDI 6022, sheet 1 (01/2018), ÖNORM H 6020 (02/2007) and ÖNORM H 6021 (09/2003)
Fulfils the hygiene requirements according to EN 16798 Part 3, VDI 6022 Sheet 1, DIN 1946 Part 4.
Acoustic data determined in accordance with ÖNORM EN ISO 5135:1999
Setting the volume flow rates without a setting device via qvmin and qvmax potentiometers
Electrical connections with screw terminals, no additional terminal boxes required
Each volumetric flow controller is factory-tested on an air test bench and certified with a sticker on the controller

Specification text attachment

Variable volume flow control with electronic Easy controller for applying a reference value and capturing an actual value to be integrated with the central BMS.

Supply voltage 24 V AC/DC
Signal voltages 0 – 10 V DC
Possible override controls with external switches using voltfree contacts: CLOSE, OPEN, qᵥmin and qᵥmax without adjustment device
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 so that commissioning and subsequent adjustment are simplified
Volume flow rate control range: approx. 20 – 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

Life cycle assessment

A life cycle assessment is available for the product type in the form of an environmental product declaration (EPD), which has been checked and published by a programme holder.