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 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.

• 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
• Lining is mineral wool
• Plastic plain bearings

• 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

• 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]

• LPA _______________________[dB(A)]

Case-radiated noise

• 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