TA-Silenzio

Easy controller, Compact controller

TROX UNIVERSAL controller, TROX LABCONTROL controller

Rectangular connections on both ends

For all upstream conditions

Conforms to VDI 6022

TA-SILENZIO

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

Rectangular VAV terminal units for the extract 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 – 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, up to 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

General Information

Application

Rectangular VAV terminal units for use in ventilation and air conditioning systems
For controlling, restricting or shutting off airflows in extract 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 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

Nominal sizes

125, 160, 200, 250, 315

Variants

TA-Silenzio: Extract air unit
TA-Silenzio-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 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

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)

Materials and surfaces

Casing made of galvanised sheet steel
Damper blade and effective pressure sensor made of aluminium
Lining is mineral wool
Plastic plain bearings

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
Other standards and guidelines in accordance with 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

Technical information

Schematic illustration of the TA-Silenzio

① Effective pressure sensor

② Indicator light

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 109 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 program.

Specification text

Rectangular VAV terminal units for variable and constant air volume systems, for demanding acoustic requirements, suitable for extract 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. Both ends suitable for the connection of ducts. 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 VDI 6022, DIN 1946, Part 4, as well as EN 13779 and VDI 3803.

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 effective pressure sensor made of aluminium
Lining is mineral wool
Plastic plain bearings

Mineral wool:

RAL quality mark RAL-GZ 388
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

With flanges on both ends
Both ends suitable for the connection of ducts.

Technical data

Nominal sizes: 125 – 315
Volume flow rate range: 27 – 872 l/s or 95 – 3142 m³/h
Minimum differential pressure: up to 109 Pa (without secondary silencer)
Maximum differential pressure: 1000 Pa
Closed blade air leakage to EN 1751, class 4. Casing air leakage to EN 1751, class C.

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 of the volume flow rates without adjustment device using qvmin and qvmax potentiometers
Electrical connections with screw terminals, no junction box required
Aerodynamic functional testing of each volume flow controller on a test rig at the factory; the test result is given on a sticker on the controller
No inflow lengths required
Acoustic data to ÖNORM EN ISO 5135:1999
Maximum system deviation 5 % at qvmax, without inflow length

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
Potentiometers with percentage scales to set the volume flow rates qᵥmin and qᵥmax
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)

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

1 Type
TA-Silenzio VAV terminal unit, extract air

2 Acoustic cladding
No entry required: None
D With acoustic cladding

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

4 Attachments (control component)
Easy Volume flow controller, dynamic, interface analogue, setting q_vmin and q_vmax with potentiometers

Order example: TA–Silenzio/125/Easy

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

Order code for volume flow control (with VARYCONTROL attachment)

TA-Silenzio

–

200

XD4

400 – 1200 [m³/h]

1 Type
TA-Silenzio VAV terminal unit, extract air

2 Acoustic cladding
No entry required: None
D With acoustic cladding

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

4 Attachments (control component)
For example
BC0 Compact controller
XD4 Universal controller (VARYCONTROL)

6 Operating mode
F Constant value (one setpoint value)
V Variable (setpoint value range)

7 Signal voltage range
For the actual and setpoint value signals
0 0 – 10 V DC
2 2 – 10 V DC

8 Operating values for factory setting
Volume flow rates [m³/h or l/s]
q_ᵥconst. (with operating mode F)
q_ᵥmin – q_ᵥmax (with operating mode V)

9 Damper blade position
Only with spring return actuators
NO Power off to OPEN
NC Power off to CLOSE

Order example: TA–Silenzio/250/BC0/V0/500–1500 m³/h

Acoustic cladding	None
Nominal size	250
Attachments (control component)	Compact controller
Operating mode	Variable
Signal voltage range	0 – 10 V DC
Operating values	q_vmin = 500 m³/h q_vmax = 1500 m³/h

Order code for volume flow control (with TROX UNIVERSAL attachment)

TA-Silenzio

–

200

TUNF

UMZ

…

1 Type
TA-Silenzio VAV terminal unit, extract air

2 Acoustic cladding
No entry: None
D With acoustic cladding

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

4 Attachments (control component)
TROX UNIVERSAL controller with
TUN Actuator (150 s)
TUNF Spring return actuator (150 s)
TUS Fast-running actuator (3 s)
TUSD Fast-running actuator (3 s) with digital communication interface (TROX HPD)

5 Equipment function
Room control
RE Extract air control (Room Exhaust)

6 Volume flow rate setting
M Master (RMF)
S Slave
F Constant flow rate controller

7 Signal voltage range
0 0 – 10 V DC
2 2 – 10 V DC

8 Expansion modules
Option 1: Power supply
No entry: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power supply (UPS)

Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP: EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock

Option 3: Automatic zero point correction
No entry: None
Z EM-AUTOZERO with solenoid valve

9 Operating values for factory setting
Volume flow rates [m³/h or l/s], pressure [Pa]
Master (RMF):
q_vmin: Minimum volume flow rate (room value)
q_vmax: Maximum volume flow rate (room value)
q_{vconst_sup}: Constant supply air (room value)
q_{vconst_ext}: Constant extract air (room value)
q_vDiff: Supply air/extract air difference (room value)

Constant value
q_vconst: Constant volume flow rate

Slave
No entry required

10 Damper blade position
Only spring return actuators
NO Power off to OPEN
NC Power off to CLOSE

Useful additions
Room control panel
BE-LCD 40-character display

Order example: TA-Silenzio-D/315/TUN/RE/S/0/Z

Acoustic cladding	With
Nominal size	315
Attachments (control component)	Controller TROX UNIVERSAL, static transducer, slow-running actuator
Equipment function	Extract air control
Volume flow rate setting	Slave
Signal voltage range	0 – 10 V DC
Expansion of attachments	With expansion module EM-AUTOZERO, Solenoid valve for automatic zero point correction of measurement point
Operating values	None (slave)

Order code for differential pressure control (with VARYCONTROL attachment)

TA-Silenzio

–

200

XF4

PRE

30 – 60 [Pa]

1 Type
TA-Silenzio VAV terminal unit, extract air

2 Acoustic cladding
No entry required: None
D With acoustic cladding

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

4 Attachments (control component)
For example
XF0 Compact controller for duct pressure
XF4 Universal controller for duct pressure (VARYCONTROL)

5 Equipment function/Installation location
PDE Duct pressure control, extract air
PRE Room pressure control extract air

6 Operating mode
F Constant value (one setpoint value)
V Variable setpoint value range)

7 Signal voltage range
For the actual and setpoint value signals
0 0 – 10 V DC
2 2 – 10 V DC

8 Operating values for factory setting
With duct pressure control, the differential pressure [Pa] is always an absolute value
∆p_const (with operating mode F)
∆p_min – ∆p_max (with operating mode V)

9 Damper blade position
Only with spring return actuators
NO Power off to OPEN
NC Power off to CLOSE

Order example: TA-Silenzio/250/PDE/XF4/F2/500 Pa/NO

Acoustic cladding	None
Nominal size	250
Attachments (control component)	VARYCONTROL Universal controller duct pressure, interface analogue with safe position and display
Equipment function	Duct pressure control, extract air
Operating mode	Constant value
Signal voltage range	2 – 10 V
Operating value	∆p_const = 500 Pa
Damper blade position	Power off to OPEN (NO)

Order code for differential pressure control (with TROX UNIVERSAL attachment)

TA-Silenzio

–

200

TUNF

PRE

MFP

UMZ

…

1 Type
TA-Silenzio VAV terminal unit, extract air

2 Acoustic cladding
No entry: None
D With acoustic cladding

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

4 Attachments (control component)
TROX UNIVERSAL controller with
TUN Actuator (150 s)
TUNF Spring return actuator (150 s)
TUS Fast-running actuator (3 s)
TUSD Fast-running actuator (3 s) with digital communication interface (TROX HPD)

5 Equipment function
Differential pressure control
PRE Room pressure control, extract air
PDE Duct pressure control, extract air

6 Differential pressure setting
MFP Master, constant pressure control
MVP Master, variable pressure control
SFP Slave, constant pressure control
SVP Slave, variable pressure control

7 Signal voltage range
0 0 – 10 V DC
2 2 – 10 V DC

8 Expansion modules
Option 1: Power supply
No entry: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power supply (UPS)

Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock

Option 3: Volume flow rate measurement
No entry: None
V EM-V Volume flow rate measurement for differential pressure control

Option 4: Automatic zero point correction
No entry: None
Z EM-AUTOZERO solenoid valve (only with V)

9 Operating values for factory setting
Volume flow rate [m³/h or l/s], pressure [Pa]

Slave SVP
Δp_min: Minimum differential pressure
Δp_max: Maximum differential pressure

SFP
Δp_const: Constant differential pressure

Master MFP and MVP – same as slave, but additionally:
q_vmin: Minimum volume flow rate (room value)
q_vmax: Maximum volume flow rate (room value)
q_{vconst_sup}: Constant supply air (room value)
q_{vconst_ext}: Constant extract air (room value)
q_vDiff: Supply air/extract air difference (room value)

10 Damper blade position
Only spring return actuators
NO Power off to OPEN
NC Power off to CLOSE

Useful additions
Room control panel
BE-LCD 40-character display

Order differential pressure transducer for room or duct pressure control separately e.g.
PT-699 For room pressure control
PT-699-DUCT For duct pressure control, including tube and pressure tap

Order example: TA-Silenzio-D/315/TUS/PRE/MVP/2/V/10 Pa/30 Pa/750 m³/h/2500 m³/h/0/0/100 m³/h

Acoustic cladding	With
Nominal size	315
Attachments (control component)	Controller TROX UNIVERSAL, static transducer, fast-running actuator
Equipment function	Room pressure control extract air
Differential pressure setting	Master, variable pressure control
Signal voltage range	2 – 10 V DC
Expansion of attachments	Volume flow rate measurement
Operating values	Pressure range: Δp_min-_{Δp_max: 10 – 30 Pa}_{Volume flow rate range q_vmin - q_vmax: 750 – 2500 m³/h (room values)} _{Constant supply/extract air q_{vconst_CLOSED,}q_{vconst_Ex}: 0 m³/h (room values)} _{Supply air/extract air difference: q_vDiff: 100 m³/h (room value)}

Order code for room control (with EASYLAB attachment)

TA-Silenzio

–

200

ELAB

UMZ

LAB

…

1 Type
TA-Silenzio VAV terminal unit, extract air

2 Acoustic cladding
No entry: None
D With acoustic cladding

3 Nominal size [mm]
125
160
200
250
315

4 Attachments (control component)
ELAB EASYLAB controller TCU3

5 Actuators
S Fast-running actuator (3 s)
SD Fast-running actuator (3 s), with digital communication interface (TROX HPD)

6 Equipment function
Room control
RE Extract air control (Room Exhaust)
PC Differential pressure control (Pressure Control)

8 Expansion modules
Option 1: Power supply
No entry: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power supply (UPS)

Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP: EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock

Option 3: Automatic zero point correction
No entry: None
Z EM-AUTOZERO Solenoid valve for automatic zero point correction

9 Additional functions
Without room management function
LAB Extract air led system (laboratories)
CLR Supply air led system (clean rooms)

With room management function
LAB-RMF Extract air led system
CLR-RMF Supply air led system

10 Operating values for factory setting
(only required when room management function is active)

Volume flow rate [m³/h] or [l/s]

Total extract air/supply air of room:
q_v1: Standard mode
q_v2: Reduced operation
q_v3: Increased operation
q_v4: Constant supply air
q_v5: Constant extract air
q_v6: Supply air/extract air difference
Δp_Set: Setpoint pressure (only with differential pressure control)

Useful additions
Room control panel (only for units with RMF)
BE-LCD 40-character display

The differential pressure transducer required for room pressure control (equipment function) has to be ordered separately, e.g.
PT-699 Measuring range ±50 Pa or ±100 Pa
PT-GB604 Measuring range ±100 Pa

Order example: TA-Silenzio/160/ELAB/SD/RE/IZ/LAB

Acoustic cladding	None
Nominal size	160
Attachments (control component)	EASYLAB controller TCU3
Actuator	Fast-running actuator (3 s), with digital communication interface (TROX HPD)
Equipment function	Extract air control
Expansion of attachments	With expansion module Type EM-IPBACnet/Modbus-IP interface, web server with expansion module EM-AUTOZERO,Solenoid valve for automatic zero point correction of measurement point
Additional function	Extract air led system for laboratories Room management function has been deactivated
Operating values	Not required

Order code for single operation (with EASYLAB attachment)

TA-Silenzio

–

200

ELAB

–

UMZ

…

1 Type
TA-Silenzio VAV terminal unit, extract air

2 Acoustic cladding
No entry: None
D With acoustic cladding

3 Nominal size [mm]
125
160
200
250
315

4 Attachments (control component)
ELAB EASYLAB controller TCU3

5 Actuators
S Fast-running actuator (3 s)
SD Fast-running actuator (3 s), with digital communication interface (TROX HPD)

6 Equipment function
Single operation
EC Extract air controller

7 External volume flow rate setting
E0 Voltage signal 0 – 10 V DC
E2 Voltage signal 2 – 10 V DC
2P Switch contacts (provided by others) for 2 switching steps
3P Switch contacts (provided by others) for 3 switching steps
F Volume flow rate constant value, without signalling

8 Expansion modules
Option 1: Power supply
No entry: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power supply (UPS)

Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP: EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock

Option 3: Automatic zero point correction
No entry: None
Z EM-AUTOZERO Solenoid valve for automatic zero point correction

10 Operating values for factory setting
Volume flow rate [m³/h] or [l/s]
Depending on external volume flow rate setting
E0, E2: q_vmin/q_vmax
2P: q_v1/q_v2
3P: q_v1/q_v2/q_v3
F: q_v1

Order example: TA–Silenzio/200/ELAB/S/EC/E0/300-1000

Acoustic cladding	None
Nominal size	200
Attachments (control component)	EASYLAB controller TCU3
Actuator	Fast-running actuator (3 s)
Equipment function	Extract air controller
External volume flow rate setting	Voltage signal 0 – 10 V DC
Operating values	q_vmin = 300 m³/hq_vmax = 1000 m³/h

Downloads

product information

Product data sheet Type TA-Silenzio

TA-Silenzio_PD_2023_06_14_DE_en Product data sheet 840 KB pdf

brochures

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

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

certificates

Certificate concerning statistical leakage tests

LC_v2_2024_10_DE_en Certificate 650 KB pdf
Certificate concerning statistical leakage tests

LC_v1_2024_10_DE_en Certificate 660 KB pdf
Declaration of conformity or declaration of incorporation Types TZ-Silenzio, TA-Silenzio

CE_2013_05_TZ_TA-Silenzio_DE_en Declaration of conformity or declaration of incorporation 160 KB pdf
Declaration of hygiene conformity Type TA-Silenzio

TA-Silenzio_HC_2024_05_DE_en Hygiene certificate 1,4 MB pdf
Environmental Product Declaration TA-Silenzio

TA-Silenzio_EPD_2024_07_DE_en Environmental Product Declarations 1,1 MB pdf
Environmental Product Declaration TA-Silenzio-D

TA-Silenzio-D_EPD_2024_07_DE_en Environmental Product Declarations 1,1 MB pdf

operation manuals

Assembly and operating instructions TA-Silenzio

TA-Silenzio_IOM_CD10004_V2_2024_01_GB_en 1,7 MB pdf

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TA-SILENZIO

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

General Information

Technical information

Downloads

product information

Product data sheet Type TA-Silenzio

brochures

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

certificates

Certificate concerning statistical leakage tests

Certificate concerning statistical leakage tests

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

Declaration of hygiene conformity Type TA-Silenzio

Environmental Product Declaration TA-Silenzio

Environmental Product Declaration TA-Silenzio-D

operation manuals

Assembly and operating instructions TA-Silenzio

TROX Services

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