TZ-Silenzio

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 volume flow systems, for demanding acoustic requirements, for supply air, available in 5 nominal sizes. High control accuracy of the set volume flows under any upstream conditions. Ready-tocommission control unit, consisting of mechanical parts and electronic control components. Each unit contains an averaging differential pressure sensor for volume flow measurement, a damper blade, and an integrated sound attenuator. Control components are factory-mounted, tubed and wired. Differential pressure sensor with 3 mm measuring holes, making it insensitive to contamination. Casing with acoustic and thermal insulation. Position of the damper blade visible from the outside due to the shape of the shaft. The damper blade is factory-set to open position, which allows airflow even without control function; except for variants with defined NC safety position. Meets the hygiene requirements of EN 16798, Part 3, of VDI 6022, Sheet 1, and of DIN 1946, Part 4.

• 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

• Casing made of galvanised sheet steel
• Damper blade and differential pressure sensor made of aluminium sections
• Lining made of mineral wool
• Plastic plain bearings

• According to EN 13501, fire rating class A1, non-combustible
• RAL quality mark RAL-GZ 388
• Non-hazardous to health due to high biosolubility according to the German Hazardous Substance Ordinance and Note Q of European Regulation (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

• 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

• Nominal sizes: 125 – 315
• Volume flow range: 27 – 872 l/s or 95 – 3142 m³/h
• Minimum differential pressure: up to 106 Pa (without secondary silencer)
• Maximum permissible differential pressure: 1000 Pa
• Leakage airflow with closed damper blade according to EN 1751, Class 4
• Casing leakage air flow according to EN 1751, class C

• 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 flows qᵥmin and qᵥmax without adjustment device
• Actual value signal relates to the nominal volume flow, therefore simplifying commissioning and subsequent adjustment
• Volume flow control range: approx. 10 – 100 % of the nominal volume flow
• Clearly visible external indicator light for signalling the functions: regulated, not regulated, and power failure
• Electrical connections with screw terminals
• Double terminals for connecting the supply voltage, for easy transmission of the voltage to the subsequent controller

Sizing data

• qᵥ [m³/h]
• Δpst [Pa]

• LPA [dB(A)]

• LPA [dB(A)]

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