TVE-Q

his specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

Specification text

VAV terminal units in rectangular design for variable and constant volume flow systems, for supply air or extract air, in several nominal sizes. High control accuracy of set volume flow rates, even in unfavourable upstream conditions. Control range at least 1:10. Differential pressure measurement and control via damper blade. Effective pressure transmission via a channel in the shaft (tubeless). Air leakage with closed damper blade according to EN 1751: Class 3. Casing air leakage according to EN 1751: Class C. Ready-to-commission unit which consists of the mechanical parts and the factory mounted electronic control component. Position of the damper blade can be seen from the outside on the control component. The damper blade is factory set to open position, which allows a ventilation airflow even without control. Meets the hygiene requirements of EN 16798, Part 3, of VDI 6022, Sheet 1, and of DIN 1964, Part 4.

Special features

• High differential pressure signal with small angle of attack
• Factory set-up or programming and aerodynamic function testing
• Volume flow rate can be measured and subsequently adjusted. Additional adjustment tool may be required (depending on the variant of the control component)
• Tubeless differential pressure measurement via damper blade
• Differential pressure transmission through differential pressure duct in axis
• Any airflow direction if dynamic transducer is used
• Any installation orientation also with static transducer
• Suitable for air velocities from 0.8 - 8 m/s
• Compact dimensions for use in confined ceiling areas

Materials and surfaces

• Casing and damper blade made of galvanised sheet steel
• Shaft made of PA6, UL94-V0 (H ≤ 200) or aluminium (H > 200)
• Closed-cell damper blade seal made of EPDM
• Bearings made of plastic

Equivalence criteria

• Declaration of hygiene conformity in accordance with VDI 6022, part 1 (01/2018), ÖNORM H 6020 (03/2015) and ÖNORM H 6021 (08/2016)
• Independent of air direction - air flow in both directions
• Suitable for airflow velocities of 0.8 – 8 m/s
• No inflow lengths required (even after T-piece)
• Meets the hygiene requirements according to EN 16798 Part 3, VDI 6022 Sheet 1, DIN 1946 Part 4
• Setting the volume flow rates without adjustment device via Vmin- and Vmax-potentiometer
• Electrical connections with screw terminals, no additional connection box required
• Acoustic data determined according to ÖNORM EN ISO 5135
• Maximum control deviation of 5 % at qvmax, without upstream section

Connection

• Flanges on both ends, suitable for duct connections

Technical data

• Minimum differential pressure: up to 50 Pa (without secondary silencer)

• Control component with dynamic transducer: 900 Pa
• Control component with static transducer: 600 Pa

Specification text for attachment

Variable volume flow control with electronic Easy controller for applying a reference value and capturing an actual value to be integrated with the central BMS.

• 24 V AC/DC supply voltage
• Signal voltages 0 – 10 V DC
• Possible override controls with external switches using volt-free contacts: CLOSE, OPEN, qvmin and qvmax
• Potentiometers with percentage scales to set the volume flow
• rates qvmin and qvmax
• The actual value signal relates to the nominal volume flow rate so that commissioning and subsequent adjustment are simplifed
• Volume flow rate control range: approx. 10 – 100% of the nominal volume flow rate
• Visible indicator light for signalling the various operating conditions
• Electrical connections with screw terminals.
• Double screw terminals for looping the supply voltage, i.e. for simple connection of voltage transmission to the next controller.