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

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

Technical information

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
  • Produktbeziehungen
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.

Nominal sizes125 – 315
Volume flow rate range30 – 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 pressure5 – 65 Pa
Maximum differential pressure1000 Pa
Operating temperature10 – 50 °C


Quick sizing: Sound pressure level at differential pressure 150 Pa

Nominal sizeVVAir-regenerated noiseAir-regenerated noiseCase-radiated noiseCase-radiated noise
Nominal sizeVV
Nominal sizeVVLPALPA1LPA2LPA3
Nominal sizel/sm³/hdB (A)dB (A)dB (A)dB (A)
125 30 108 155108
125 70 252 26161919
125 125 450 34232626
125 180 648 39283031
160 45 162 1551310
160 110 396 27172221
160 195 702 34232929
160 275 990 37273434
200 65 234 131128
200 150 540 23122218
200 265 954 29172826
200 380 1368 32223331
250 85 306 143138
250 200 720 23122319
250 345 1242 28173026
250 495 1782 32203431
315 145 522 1541712
315 335 1206 23112723
315 590 2124 28163531
315 840 3024 32213936

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.

00101784_0..

 Type
TZ-Silenzio       VAV terminal unit, supply air

 Acoustic cladding
       No entry: none
D       With acoustic cladding

 Nominal size
125
160
200
250
315

 Attachments (control component)
       Example
Easy       Easy controller
BC0       Compact controller
B13       Universal controller

 

 Operating mode
E       Single
M       Master
S       Slave
F       Constant value
Z       Differential pressure control – supply air

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

 Volume flow rates [m³/h or l/s], differential pressure [Pa]
       Vmin – Vmax for factory setting
       ∆pmin for factory setting (operating mode A)

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

 

 

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