General Information

Application

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

• 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 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
• Heat exchanger Type WT

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
• Shaft and linkage: galvanised steel

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
• For other applicable standards and guidelines refer to 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

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