TZ-Silenzio

Easy controller, Compact controller

TROX UNIVERSAL controller, TROX LABCONTROL controller

Rectangular connections on both ends

For all upstream conditions

Tested to VDI 6022

TZ-SILENZIO

For supply air systems with demanding acoustic requirements and low airflow velocities

Rectangular VAV terminal units for the supply air control in buildings with variable air volume systems, demanding acoustic requirements and low airflow velocities
■ Highly effective integral attenuator
■ Optimised for airflow velocities of 0.7 – approx. 7 m/s
■ High control accuracy, even in case of unfavourable upstream conditions
■ Compact construction with rectangular connections on both ends
■ Electronic control components for different applications (Easy, Compact, Universal, and LABCONTROL)
■ Closed blade air leakage to EN 1751, Class 4
■ Casing leakage to EN 1751, 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
■ Hot water heat exchanger of Type WT for reheating the airflow

General Information

Application

Rectangular VAV terminal units for use in ventilation and air conditioning systems
For controlling, restricting or shutting off airflows in supply air systems with low velocities and demanding acoustic requirements
Integral attenuator
Closed-loop volume flow control using an external power supply
For variable or constant volume flow systems
Shut-off by means of switching (by others)
Can also be used for differential pressure control with suitable control components

Special characteristics

Hygiene tested and certified
Direct connection to ductwork
Factory set-up or programming and aerodynamic function testing
Parameters can also later be set on the control component; additional adjustment device may be necessary

Nominal sizes

125, 160, 200, 250, 315

Variants

TZ-Silenzio: supply air unit
TZ-Silenzio-D: supply 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 with potentiometers
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 TS
Heat exchanger Type WT

Construction features

Rectangular casing
Replaceable seals
Flanges on both ends for the connection to ductwork
Position of the damper blade indicated externally at shaft extension
Thermal and acoustic insulation (lining)

Material and surfaces

Casing made of galvanised sheet steel
Damper blade and effective pressure sensor made of aluminium
Lining is mineral wool
Plastic plain bearings
Shaft and linkage: 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, Sheet 1
DIN 1946, Part 4
For other applicable standards and guidelines refer to the hygiene certificate

Casing leakage

EN 1751, Class C

Closed blade air leakage

EN 1751, Class 4
Meets 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

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

Schematic illustration of the TZ-Silenzio

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

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, with a Compact controller, or with individual components (Universal).
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.

Nominal sizes	125 – 315
Volume flow rate range	30 – 840 l/s or 108 – 3024 m³ /h
Volume flow rate control range (unit with dynamic differential pressure measurement)	Approx. 10 to 100 % of the nominal volume flow rate
Minimum differential pressure	5 – 65 Pa
Maximum differential pressure	1000 Pa
Operating temperature	10 – 50 °C
Nominal sizes	125 – 315
Volume flow rate range	27 – 1093 l/s or 95 – 3937 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 106 Pa (without secondary silencer)
Maximum differential pressure	1000 Pa
Operating temperature	10 to 50 °C

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, for demanding acoustic requirements, suitable for supply air, available in 5 nominal sizes. High control accuracy even in case of unfavourable upstream conditions. 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. Casing with acoustic and thermal insulation. Position of the damper blade indicated externally at 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). Meets the hygiene requirements of EN 16798, Part 3, of VDI 6022, Sheet 1, and of DIN 1946, Part 4.

Special features

Hygiene tested and certified
Direct connection to ductwork
Factory set-up or programming and aerodynamic function testing
Parameters can also later be set on the control component; additional adjustment device may be necessary

Materials and surfaces

Casing made of galvanised sheet steel
Damper blade and differential pressure sensor made of aluminium
Lining is mineral wool
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 from airflow velocities of up to 20 m/s
Inert to fungal and bacterial growth

Connection type

Flanges on both sides, suitable for duct connection

Equivalence criteria

Declaration of hygiene conformity in accordance with VDI 6022, part 1 (01/2018), ÖNORM H 6020 (02/2007) and ÖNORM H 6021 (09/2003)
Setting of the volume flow rates without an adjustment device using Vmin- and Vmax potentiometers
Electrical connections with screw terminals, no junction box required
Aerodynamic functional testing of each volume flow controller on a test rig before shipping (test result on a sticker on the controller)
No upstream section required
Acoustic data to ÖNORM EN ISO 5135:1999
Maximum control deviation of 5 % at qvmax, without upstream section

Technical data

Nominal sizes: 125 – 315
Volume flow rate range: 27 – 872 l/s or 95 – 3142 m³/h
Minimum differential pressure: up to 106 Pa (without secondary silencer)
Maximum differential pressure: 1000 Pa
Closed blade air leakage to EN 1751, Class 4
Casing leakage to EN 1751, Class C

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)

TZ-Silenzio	–	D	/	200	/	Easy
\|		\|		\|		\|
1		2		3		4

1 Type
TZ-Silenzio VAV terminal unit, supply air

2 Acoustic cladding
No entry: none
D with acoustic cladding

3 Nominal size
125, 160, 200, 250, 315

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

Order example: TZ–Silenzio/125/Easy

Acoustic cladding	None
Nominal size	125
Attachments (control component)	Easy volume flow controller, dynamic, setting of qᵥmin and qᵥmax with potentiometers

Downloads

informazioni di prodotto

Basic information and nomenclature - VAV terminal units

Basic-information-and-nomenclature_VAV-terminal-units_PD_2022_02_25_DE_en Basic information and nomenclature 490 KB pdf
Product data sheet TZ-Silenzio

TZ-Silenzio_PD_2025_10_21_DE_en Product data sheet 10 MB pdf

brochure

Sales flyer Type LVC, TZ-Silenzio, TA-Silenzio, VFL

SF/LVC/TZ-Silenzio/TA-Silenzio/VFL/DE/en Sales flyer 940 KB pdf

certificati

Certificate concerning statistical leakage tests

LC_v2_2024_10_DE_en Certificate 650 KB pdf
Declaration of conformity or declaration of incorporation Types TZ-Silenzio, TA-Silenzio

CE_VVS_DE_en Declaration of conformity or declaration of incorporation 200 KB pdf
Declaration of hygiene conformity Type TZ-Silenzio

TZ-Silenzio_HC_2025_10_en Declaration of hygiene conformity 910 KB pdf

manuali d'uso

Assembly and operating instructions TZ-Silenzio

TZ-Silenzio_IOM_CD10009_V1_2024_01_GB_en.pdf 1,7 MB pdf

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TZ-SILENZIO

For supply air systems with demanding acoustic requirements and low airflow velocities

General Information

Technical information

Downloads

informazioni di prodotto

Basic information and nomenclature - VAV terminal units

Product data sheet TZ-Silenzio

brochure

Sales flyer Type LVC, TZ-Silenzio, TA-Silenzio, VFL

certificati

Certificate concerning statistical leakage tests

Declaration of conformity or declaration of incorporation Types TZ-Silenzio, TA-Silenzio

Declaration of hygiene conformity Type TZ-Silenzio

manuali d'uso

Assembly and operating instructions TZ-Silenzio

TROX Services

TECNICAMENTE NECESSARIO

STATISTICHE E ANALISI DEL SITO WEB

CONVENIENZA E PERSONALIZZAZIONE

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