General Information

Application

• Rectangular VAV terminal units for use in ventilation and air conditioning systems
• For controlling, restricting or shutting off the supply air flow in systems with high 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 duct or room pressure control with suitable control components

Special features

• Integral attenuator with at least 26 dB insertion loss at 250 Hz
• Hygiene tested and certified
• 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
• Inspection access according to VDI 6022

Nominal sizes

• 125, 160, 200, 250, 315, 400

Variants

• TVZ: Supply air unit
• TVZ-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
• Inspection access
• Factory assembled control components complete with wiring and tubing
• Aerodynamic functional testing on a special test rig before 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 with upstream bend R = 1D)
  

Attachments

• EASY controller: Compact unit consisting of controller with potentiometers, effective pressure transducer and actuator
• 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

Accessories

• Double lip seal (factory fitted)

Useful additions

• Secondary silencer Type TS
• Heat exchanger Type WT

Construction features

• Rectangular casing
• Spigot on the fan end suitable for circular ducts to EN 1506 or EN 13180
• Spigot with groove for double lip seal
• Connection on the room end suitable for ducts
• Baffle plate, downstream of the damper blade, for achieving the best possible acoustic and aerodynamic performance
• Position of the damper blade indicated externally at shaft extension
• Thermal and acoustic insulation (lining)

Materials and surfaces

• Casing and damper blade made of galvanised sheet steel
• Damper blade seal made of TPE plastic
• Lining is mineral wool
• Effective pressure sensor made of aluminium
• 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
• Further standards, guidelines in accordance with hygiene certificate

Casing leakage:

Nominal sizes 125 – 200

• EN 1751, Class C

Nominal sizes 250 – 400

• EN 1751, Class B

Closed blade air leakage:

Nominal sizes 125 – 160

• EN 1751, Class 3
• Meets the general requirements of DIN 1946, Part 4, with regard to the acceptable closed damper blade air leakage

Nominal sizes 200 – 400

• 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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