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, up to 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 of Type WT for reheating the airflow

VAV terminal unit, variant TVZ 00135358_0
  • Application
  • Description

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 characteristics

  • 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
  • Inspection access for cleaning to VDI 6022

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
  • 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 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


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
  • 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 information

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
Schematic illustration of the TVZ 00135861_0

① Differential pressure sensor

② Lip seal

③ Inspection access

④ Damper blade

⑤ Integral attenuator

⑥ Control components, e.g. an Easy controller

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.

Nominal sizes125 – 400 mm
Volume flow rate range15 – 1680 l/s or 54 – 6048 m³/h
Volume flow rate control range (unit with dynamic differential pressure measurement)Approx. 10 – 100 % of the nominal volume flow rate
Minimum differential pressure5 – 80 Pa
Maximum differential pressure1000 Pa
Operating temperature10 – 50 °C


Quick sizing: Sound pressure level at differential pressure 150 Pa

Nominal sizeVVAir-regenerated noiseAir-regenerated noiseCase-radiated noiseCase-radiated noise
Nominal sizeVV
Nominal sizeVVLPALPA1LPA2LPA3
Nominal sizel/sm³/hdB(A)dB(A)dB(A)dB(A)
125 15 54 171621<15
125 60 216 24202416
125 105 378 29242719
125 150 540 34293223
160 25 90 181620<15
160 100 360 28242518
160 175 630 35292921
160 250 900 36303527
200 40 144 16<152215
200 160 576 21172720
200 280 1008 23173123
200 405 1458 31243931
250 60 216 16152216
250 250 900 17<152619
250 430 1548 22152922
250 615 2214 31213728
315 105 378 18152115
315 410 1476 21162719
315 720 2592 24183324
315 1030 3708 29223829
400 170 612 17<152517
400 670 2412 19152920
400 1175 4230 26203325
400 1680 6048 32274335

① TVZ

② TVZ with secondary silencer TS

③ TVZ-D


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 characteristics

  • 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
  • Inspection access for cleaning to VDI 6022

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


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
  • 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 to 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
  • Minimum differential pressure: 5 – 80 Pa
  • Maximum differential pressure: 1000 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, Vmin and Vmax
  • Potentiometers with percentage scales to set the volume flow rates Vmin and Vmax
  • 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.

00101785_0

 Type
TVZ       VAV terminal unit, supply air

 Acoustic cladding
       No entry: none
D       With acoustic cladding

Nominal size [mm]
125
160
200
250
315
400

 Accessories
       No entry: none
D1       Lip seal

 

 Attachments (control component)
       Example
Easy       Easy controller
BC0       Compact controller
B13       Universal controller

Operating mode
E       Single
M       Master
S       Slave
F       Constant value
Z       Differential pressure control – supply air

 Signal voltage range
       For the actual and setpoint value signals
0       0 – 10 V DC
2       2 – 10 V DC

 Volume flow rates [m³/h or l/s], differential pressure [Pa]
       Vmin – Vmax for factory setting
       ∆pmin for factory setting (operating mode A)

 Damper blade position
       Only with spring return actuators
NO       Power off to OPEN
NC       Power off to CLOSE

 

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