VRD active

Cost-effective construction
Highest control accuracy
Very short design

Supply and exhaust air safely under control with just one controller. With LTG map control.

The VRDactive variable volume flow controllers are used to control the volume flow in round air ducts of Comfort Air Technology systems independently of the pre-pressure. A full barrier can also be realized. Available with dynamic (VRDactive) and static (VRDactive-s) measuring principle. Activation and control are carried out with external energy (electrical). With 2 dampers for supply/exhaust air control in parallel ducts (e.g. hotel rooms).
The volume flow is measured either on the supply air side (supply air-led ventilation) or on the extract air side (extract air-led ventilation) and controlled according to a specified setpoint. The other – unmeasured – volume flow is synchronized by the fixed mechanical connection of the two dampers.

  • Cost-effective design and low wiring effort: a compact controller for supply and exhaust air
  • Highest control accuracy of all known controllers in the low air velocity range due to differential pressure amplification
  • Very short design, insensitive to inflow, simple integration
  • Large control ratio of 1:10 (pipe velocities 1…10 m/s)
  • Also with static differential pressure measurement – suitable for laboratories and hospitals

Ready for a breath of fresh air? Contact our comfort air experts now and breathe easy – literally!

Technical data

Technical Data for L_pa= 35 dB(A)

Volumenstrombereich 27 - approx. 1100 m³/h Regelverhältnis 10 : 1 Differenzdruckbereich up to 1000 Pa Gehäuseleckage nach DIN EN 1751 Class A standard Gehäuseleckage nach DIN EN 1751 Class C (optional) Luftdichte Absperrung nach DIN EN 1751 Class 4 (DN 100 + 125: Class 3) Regelabweichung max. 5% from V

Sizes [mm] Ø 100 - 200, installation length [mm] 195 - 215

Design/Options

MP (optional) Housing version BACnet Galvanized steel Modbus Silencer SDE (optional) Messprinzip dynamisch (für nicht belastete Luft) Static (for polluted air) (optional) Handeinstellgerät (optional) Insulating shell (optional) Analog / digital control (bus) analog

Downloads

Ordering help for variable volume flow controllers
FILE 217.52 kB
Operating instructions 4-stage switch for domestic ventilation
PDF 597.96 kB
Planning aid for volume flow control
PDF 367.24 kB
Newsletter NFC "Assistant App"
PDF 393.18 kB
Technical brochure air distribution unit VRD Active
PDF 1.1 MB
Short information air distribution unit VR Active
PDF 885.64 kB
Short information air distribution unit VRD Active
PDF 1.31 MB
Installation Instructions variable flow rate controllers VR. active
PDF 1.43 MB
Presentation Air Distribution Unit VR active
PDF 431.17 kB

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