Type TZ-Silenzio

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

Rectangular VAV terminal units for the supply air or 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 – 6 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 air 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
  • Hot water heat exchanger of Type WT for reheating the airflow

VAV terminal unit Type TZ-Silenzio 00131539_0


  • Application
  • Description

Application

  • VARYCONTROL VAV terminal units of Type TZ-Silenzio for the supply air control in variable air volume systems with low airflow velocities
  • Closed-loop volume flow control using an external power supply
  • Integral attenuator for demanding acoustic requirements
  • Shut-off by means of switching (equipment supplied by others)

Special characteristics

  • Hygiene tested and certified
  • Direct connection of ducting
  • Factory set-up or programming and aerodynamic function testing
  • Volume flow rate can be measured and subsequently adjusted on site; additional adjustment tool 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 differential pressure sensor for volume flow rate measurement
  • Damper blade
  • Integral attenuator
  • Factory-assembled control components complete with wiring and tubing
  • Aerodynamic function 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, differential pressure transducer and actuator
  • Universal controller: Controller, differential 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 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 differential pressure sensor made of aluminium
  • Lining is mineral wool
  • Plastic 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
  • Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EG
  • 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

  • Hygiene conforms to VDI 6022
  • VDI 2083, air cleanliness class 3, and US standard 209E, class 100
  • Closed blade air leakage to EN 1751, class 4
  • Meets the increased requirements of DIN 1946, part 4, with regard to the acceptable closed blade air leakage
  • Casing air leakage to EN 1751, class B

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
Schematic illustration of the TZ-Silenzio 00131155_0
① Integral attenuator
② Differential pressure sensor
③ Control components, e.g. an Easy controller
④ Damper blade with seal


Functional description

The VAV terminal unit is fitted with a differential pressure sensor for measuring the volume flow rate.

The control components (attachments) include a differential pressure transducer that transforms the differential pressure (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.

Volume flow rate ranges

The minimum differential pressure of VAV terminal units is an important factor in designing the ductwork and in rating the fan including speed control.

Sufficient duct pressure must be ensured for all operating conditions and for all control 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. The table gives the minimum and maximum values for a VAV terminal unit. Some control components may only have a limited volume flow rate range. This applies in particular to control components with a static differential pressure transducer. For volume flow rate ranges for all control components refer to our Easy Product Finder design programme.

Nominal size
V
l/s
V
m³/h

∆pst min
Pa

∆pst min
Pa
∆V
± %
125 30 108 5 5 8
125 70 252 10 20 7
125 125 450 35 60 5
125 180 648 65 120 5
160 45 162 5 5 8
160 110 396 10 20 7
160 195 702 30 55 5
160 275 990 55 105 5
200 65 234 5 5 8
200 150 540 10 20 7
200 265 954 30 60 5
200 380 1368 55 120 5
250 85 306 5 5 8
250 200 720 10 20 7
250 345 1242 30 60 5
250 495 1782 60 115 5
315 145 522 5 5 8
315 335 1206 15 20 7
315 590 2124 35 50 5
315 840 3024 65 105 5


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




Quick sizing tables provide a good overview of the room sound pressure levels that can be expected. Approximate intermediate values can be interpolated. Precise intermediate values and spectral data can be calculated with our Easy Product Finder design programme.

The first selection criteria for the nominal size are the actual volume flow rates Vmin and Vmax. 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 is required.

TZ-Silenzio, Sound pressure level at differential pressure 150 Pa

Nominal size V Air-regenerated noise Case-radiated noise
Nominal size V
Nominal size V LPA LPA1 LPA2 LPA3
Nominal size l/s m³/h dB (A)

125

30

108

15

5

10

8

125

70

252

26

16

19

19

125

125

450

34

23

26

26

125

180

648

39

28

30

31

160

45

162

15

5

13

10

160

110

396

27

17

22

21

160

195

702

34

23

29

29

160

275

990

37

27

34

34

200

65

234

13

1

12

8

200

150

540

23

12

22

18

200

265

954

29

17

28

26

200

380

1368

32

22

33

31

250

85

306

14

3

13

8

250

200

720

23

12

23

19

250

345

1242

28

17

30

26

250

495

1782

32

20

34

31

315

145

522

15

4

17

12

315

335

1206

23

11

27

23

315

590

2124

28

16

35

31

315

840

3024

32

21

39

36

① TZ-Silenzio

② TZ-Silenzio with secondary silencer TS

③ TZ-Silenzio-D


Rectangular VAV terminal units for variable and constant air volume systems for demanding acoustic requirements, suitable for supply or extract air, available in 5 nominal sizes.

High control accuracy even in case of unfavourable upstream conditions.

Ready-to-commission unit which consists of the mechanical parts and the electronic control components. Each unit contains an averaging differential pressure sensor for volume flow rate measurement, a damper blade, and an integral attenuator. Factory-assembled control components complete with wiring and tubing.

Differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)

Both ends suitable for the connection of air duct profiles.

Casing with acoustic and thermal insulation.

Position of the damper blade indicated externally at shaft extension.

Closed blade air leakage to EN 1751, class 4.

Casing air leakage to EN 1751, class B.

Complies with VDI 2083, clean room class 3, and US standard 209E, class 100. Hygiene complies with VDI 6022, DIN 1946, part 4, as well as EN 13779 and VDI 3803.

Special characteristics

  • Hygiene tested and certified
  • Direct connection of ducting
  • Factory set-up or programming and aerodynamic function testing
  • Volume flow rate can be measured and subsequently adjusted on site; additional adjustment tool 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 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
  • Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EG
  • Faced with glass fibre fabric as protection against erosion through airflow velocities of up to 20 m/s
  • Inert to fungal and bacterial growth

Technical data

  • Nominal sizes: 125 – 315
  • Volume flow rate range: 30 to 840 l/s or 108 to 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

Attachments

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 volt-free contacts: CLOSED, OPEN, Vmin and Vmax
  • Potentiometers with percentage scales to set the volume flow rates Vmin and Vmax
  • 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

  • V _______________________ [m³/h]
  • Δpst _______________________ [Pa]

Air-regenerated noise

  • LPA _______________________ [dB(A)]

Case-radiated noise

  • LPA _______________________ [dB(A)]

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

Order example: TZ–Silenzio/200/BC0/E0/300–1200 m³/h

Acoustic cladding

Without

Nominal size

200

Attachment

Compact controller

Operating mode

Single

Signal voltage range

0 – 10 V DC

Volume flow rate

300 – 1200 m³/h


Order example: TZ–Silenzio/200/ELAB/RS/LAB

Acoustic cladding

Without

Nominal size

200

Attachment

EASYLAB controller TCU3 with fast-running actuator

Equipment function

Supply air control (Room Supply)

Additional function

Extract air led system for laboratories


 

Variants, Attachments, Dimensions and weight, Product details

  • Variants
  • ATTACHMENTS
  • Dimensions and weight
  • Product details

TZ-Silenzio

  • VAV terminal unit for the control of variable supply air volume flows

TZ-Silenzio-D

  • VAV terminal unit with acoustic cladding for the control of variable supply air volume flows
  • For rooms where the case-radiated noise of the unit is not sufficiently reduced by a false ceiling
  • The ducts for the room under consideration must have adequate acoustic insulation (to be provided by others) on the fan end
  • Acoustic cladding cannot be retrofitted

TZ-Silenzio, VARYCONTROL control components

Order code detail Controlled variable Controller Differential pressure transducer Actuator

Easy controller





Easy

Volume flow rate

Easy controller TROX

Dynamic, integral

Integral

Compact controller, dynamic





BC0

Volume flow rate

Compact controller with MP bus interface TROX/Belimo

Dynamic, integral

Integral

BL0

Volume flow rate

Compact controller with LonWorks interface TROX/Belimo

Dynamic, integral

Integral

BM0

Volume flow rate

Compact controller with Modbus RTU interface (with connecting cable) TROX/Belimo

Dynamic, integral

Integral

BM0-J6

Volume flow rate

Compact controller with Modbus RTU interface (with socket) TROX/Belimo

Dynamic, integral

Integral

XB0

Volume flow rate

Compact controller TROX/Gruner

Dynamic, integral

Integral

LN0

Volume flow rate

Compact controller Siemens

Dynamic, integral

Integral

LK0

Volume flow rate

Compact controller with KNX interface Siemens

Dynamic, integral

Integral

Compact controller, static





SA0

Volume flow rate

Compact controller with SLC interface Sauter

Static, integral

Integral

SC0

Volume flow rate

Compact controller with SLC interface Sauter

Static, integral

Fast-running actuator, integral

Universal controller, dynamic





B13

Volume flow rate

Universal controller TROX/Belimo

Dynamic, integral

Actuator

B1B

Volume flow rate

Universal controller TROX/Belimo

Dynamic, integral

Spring return actuator

XC3

Volume flow rate

Universal controller TROX/Gruner

Dynamic, integral

Spring return actuator

Universal controller, static





BP3

Volume flow rate

Universal controller with MP bus interface TROX/Belimo

Static

Actuator

BPB

Volume flow rate

Universal controller with MP bus interface TROX/Belimo

Static

Spring return actuator

BPG

Volume flow rate

Universal controller with MP bus interface TROX/Belimo

Static

Fast-running actuator

BB3

Volume flow rate

Universal controller TROX/Belimo

Static

Actuator

BBB

Volume flow rate

Universal controller TROX/Belimo

Static

Spring return actuator

XD1

Volume flow rate

Universal controller TROX/Gruner

Static, integral

Actuator

XD3

Volume flow rate

Universal controller TROX/Gruner

Static, integral

Spring return actuator

BR3

Differential pressure

Universal controller with MP bus interface TROX/Belimo

Static, integral 100 Pa

Actuator

BRB

Differential pressure

Universal controller with MP bus interface TROX/Belimo

Static, integral 100 Pa

Spring return actuator

BRG

Differential pressure

Universal controller with MP bus interface TROX/Belimo

Static, integral 100 Pa

Fast-running actuator

BG3

Differential pressure

Differential pressure controller TROX/Belimo

Static, integral 100 Pa

Actuator

BGB

Differential pressure

Differential pressure controller TROX/Belimo

Static, integral 100 Pa

Spring return actuator

XE1

Differential pressure

Differential pressure controller TROX/Gruner

Static, integral 100 Pa

Actuator

XE3

Differential pressure

Differential pressure controller TROX/Gruner

Static, integral 100 Pa

Spring return actuator


TZ-Silenzio, LABCONTROL control components

Order code detail Controlled variable Controller Differential pressure transducer Actuator

EASYLAB





ELAB

Room supply air Room pressure Single controller

EASYLAB controller TCU3

Static, integral

Fast-running actuator

Nominal size
L
mm
B3
mm
H3
mm
B
mm
B1
mm
H
mm
H1
mm
m
kg
125 1035 300 236 198 232 152 186 17
160 1035 410 236 308 342 152 186 21
200 1250 560 281 458 492 210 244 32
250 1250 700 311 598 632 201 235 41
315 1250 900 361 798 832 252 286 54


Nominal size
L
mm
B3
mm
H3
mm
B
mm
B1
mm
H
mm
H1
mm
m
kg
125 1035 380 316 198 232 152 186 32
160 1035 490 316 308 342 152 186 38
200 1250 640 361 458 492 210 244 64
250 1250 780 391 598 632 201 235 72
315 1250 980 441 798 832 252 286 91




Detail of flange 00137158_0
① Compressible seal, to be provided by others
② Flange


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • Any installation orientation (except units with static differential pressure transducer)
  • Return edges of the casing with drilled holes suitable for M10 threaded rods
  • TZ-Silenzio-D: For constructions with acoustic cladding, ducts on the room side should have cladding up to the acoustic cladding of the controller

Upstream conditions

The volume flow rate accuracy ΔV 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.

Space required for commissioning and maintenance

Sufficient space must be kept clear near any attachments to allow for commissioning and maintenance. It may be necessary to provide sufficiently sized inspection access openings.

Space required

Attachments
Attachments mm

VARYCONTROL




Easy controller

700

300

300

Compact controller

700

300

300

Universal controller

700

300

300

LABCONTROL




EASYLAB

700

350

400


Principal dimensions

ØD [mm]

VAV terminal units made of stainless steel: Outside diameter of the spigot

VAV terminal units made of plastic: Inside diameter of the connecting spigot

ØD₁ [mm]

Pitch circle diameter of flanges

ØD₂ [mm]

Outside diameter of flanges

ØD₄ [mm]

Inside diameter of the screw holes of flanges

L [mm]

Length of unit including connecting spigot

L₁ [mm]

Length of casing or acoustic cladding

B [mm]

Duct width

B₁ [mm]

Screw hole pitch of flange (horizontal)

B₂ [mm]

Outside dimension of flange (width)

B₃ [mm]

Width of device

H [mm]

Duct height

H₁ [mm]

Screw hole pitch of flange (vertical)

H₂ [mm]

Outside dimension of flange (height)

H₃ [mm]

Unit height

n [ ]

Number of flange screw holes

T [mm]

Flange thickness

m [kg]

Unit weight including the minimum required attachments (e.g. Compact controller)

Acoustic data

fm [Hz]

Octave band centre frequency

LPA [dB(A)]

A-weighted sound pressure level of air-regenerated noise of the VAV terminal unit, system attenuation taken into account

LPA1 [dB(A)]

A-weighted sound pressure level of air-regenerated noise of the VAV terminal unit with secondary silencer, system attenuation taken into account

LPA2 [dB(A)]

A-weighted sound pressure level of case-regenerated noise of the VAV terminal unit, system attenuation taken into account

LPA3 [dB(A)]

A-weighted sound pressure level of case-regenerated noise of the VAV terminal unit with acoustic cladding, system attenuation taken into account


All sound pressure levels are based on 20 μPa.

Volume flow rates

Vnom [m³/h] and [l/s]

Nominal volume flow rate (100 %)

  • The value depends on product type and nominal size
  • Values are published on the internet and in technical leaflets, and stored in the Easy Product Finder design software.
  • Reference value for calculating percentages (e.g. Vmax)
  • Upper limit of the setting range and maximum volume flow rate setpoint value for the VAV terminal unit

Vmin unit [m³/h] and [l/s]

Technically possible minimum volume flow rate

  • The value depends on product type, nominal size and control component (attachment)
  • Values are stored in the Easy Product Finder design software
  • Lower limit of the setting range and minimum volume flow rate setpoint value for the VAV terminal unit
  • Depending on the controller, setpoint values below Vmin unit (if Vmin equals zero) may result in unstable control or shut-off

Vmax [m³/h] and [l/s]

Upper limit of the operating range for the VAV terminal unit that can be set by customers

  • Vmax can only be smaller than or equal to Vnom
  • In case of analogue signalling to volume flow controllers (which are typically used), the set maximum value (Vmax) is allocated to the setpoint signal maximum (10 V) (see characteristic)

Vmin [m³/h] and [l/s]

Lower limit of the operating range for the VAV terminal unit that can be set by customers

  • Vmin should be smaller than or equal to Vmax
  • Do not set Vmin smaller than Vmin unit, otherwise the control may become unstable or the damper blade may close
  • Vmin may equal zero
  • In case of analogue signalling to volume flow controllers (which are typically used), the set minimum value (Vmin) is allocated to the setpoint signal minimum (0 or 2 V) (see characteristic)

V [m³/h] and [l/s]

Volume flow rate

ΔV [± %]

Volume flow rate tolerance from setpoint value

ΔVwarm [± %]

Volume flow rate tolerance for the warm air flow of dual duct terminal units

Differential pressure

Δpst [Pa]

Static differential pressure

Δpst min [Pa]

Static differential pressure, minimum

  • The static minimum differential pressure is equal to the pressure loss of the VAV terminal unit when the damper blade is open, caused by flow resistance (sensor tubes, damper mechanism)
  • If the pressure on the VAV terminal unit is too low, the setpoint volume flow rate may not be achieved, not even when the damper blade is open
  • Important factor in designing the ductwork and in rating the fan including speed control
  • Sufficient duct pressure must be ensured for all operating conditions and for all terminal units, and the measurement point or points for speed control must have been selected accordingly to achieve this

Construction

Galvanised sheet steel

  • Casing made of galvanised sheet steel
  • Parts in contact with the airflow as described for the product type
  • External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

Powder-coated surface (P1)

  • Casing made of galvanised sheet steel, powder-coated RAL 7001, silver grey
  • Parts in contact with the airflow are powder-coated or made of plastic
  • Due to production, some parts that come into contact with the airflow may be stainless steel or aluminium, powder-coated
  • External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

Stainless steel (A2)

  • Casing made of stainless steel 1.4201
  • Parts in contact with the airflow are powder-coated or made of stainless steel
  • External parts, e.g. mounting brackets or covers, are usually made of galvanised sheet steel

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