Type TVZ

For supply air systems with demanding acoustic requirements

VAV terminal units for the supply air control in buildings with variable air volume systems and demanding acoustic requirements

Highly effective integral attenuator
Box style construction for the reduction of the airflow velocity
Electronic control components for different applications (Easy, Compact, Universal, and LABCONTROL)
Suitable for airflow velocities up to 13 m/s
Closed blade air leakage to EN 1751, class 4
Casing air leakage to EN 1751, class A

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 Type WT for reheating the airflow

Application

VARYCONTROL VAV terminal units of Type TVZ for the supply air control in variable air volume systems
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 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
Volume flow rate can later be measured and adjusted on site; additional adjustment device may be necessary

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 differential pressure sensor for volume flow rate measurement
Damper blade
Integral attenuator
Inspection access for cleaning to VDI 6022
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 with upstream bend R = 1D)

Attachments

Easy controller: Compact unit consisting of controller with potentiometers, differential pressure transducer and actuator
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

Accessories

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 lip seal
Connection on the room end suitable for air duct profiles
Baffle plate is fitted after the damper blade for optimum 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
Differential pressure sensor made of aluminium
Plastic bearings

TVZ-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

Información técnica

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 or LABCONTROL).

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.

The airflow velocity at the room end is, due to the larger rectangular cross section, about half the velocity in the circular duct.

Rectangular VAV terminal units for variable and constant air volume systems, suitable for supply air, available in 6 nominal sizes.

High control accuracy (even with upstream bend R = 1D).

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)

On the fan end, spigot with groove for lip seal, suitable for connecting ducts according to EN 1506 or EN 13180.

Room end suitable for the connection of air duct profiles.

Baffle plate is fitted after the damper blade for optimum acoustic and aerodynamic performance.

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 (nominal sizes 125 and 160, class 3).

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 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
Volume flow rate can later be measured and adjusted on site; additional adjustment device may be necessary

Materials and surfaces

Casing and damper blade made of galvanised sheet steel
Damper blade seal made of TPE plastic
Lining is mineral wool
Differential pressure sensor made of aluminium
Plastic bearings

TVZ-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 – 400 mm
Volume flow rate range: 15 to 1680 l/s or 54 to 6048 m³/h
Volume flow rate control range (unit with dynamic differential pressure measurement): approx. 10 to 100 % of the nominal volume flow rate
Differential pressure: 5 – 1500 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, V_min and V_max
Potentiometers with percentage scales to set the volume flow rates V_min and V_max
The actual value signal relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified
Volume flow rate 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.