Circular VAV terminal units for variable air volume systems with low airflow velocities, suitable for supply or extract air, available in four nominal sizes. Measurement and control of low volume flow rates based on a new measurement principle. Plastic nozzle with damper blade for measuring the differential pressure upstream and downstream of the damper blade (effective pressure). The relation between damper blade position and differential pressure is stored as a characteristic relationship in the Easy or Compact controller. This results in high control accuracy even in case of unfavourable upstream conditions. Commissioning ready device, consisting of the mechanical components and the electronic control components. Units are equipped with a plastic nozzle with integral damper blade. The averaging differential pressure sensor is resistant to dust and pollution. Position of the damper blade indicated externally at shaft extension. Indicated Damper blade open at delivery, thereby air flow also given without control function.

SPECIAL CHARACTERISTICS
- Optimised for low airflow velocities from 0.6 to 6 m/s
- High control accuracy even in case of unfavourable upstream conditions
- Any installation orientation
- Volume flow rate control with Easy or Compact controller
- Casing length of only 310 mm

MATERIALEN EN AFWERKING
- Casing made of galvanised sheet steel
- Nozzle, damper blade, and plain bearings made of ABS plastic UL 94, flame retardant (V-0)
- Damper blade seal made of TPV (plastic)

AANSLUITWIJZE
Spigot with groove for lip seal, suitable for connecting ducts according to circular ducts to EN 1506 or EN 13180

TECHNISCHE GEGEVENS
- Flow rate range: 30 - 270 m³/h
- Minimum differential pressure: 5 - 30 Pa
- Maximum permissible differential pressure: 600 Pa
- Casing air leakage according to EN 1751: Class C
- Closed blade air leakage to EN 1751: Class 2

UITVOERING
125 Grootte: 125
BC0 Regelcomponent: BC0 | Luchthoeveelheid;schone lucht;zonder veiligheidsfunctie
V Bedrijfstoestand: Variabel
0 Signaalspanningsbereik:  0 - 10 V DC
30 Vmin
270 Vmax
m³/h Eenheid

AANBOUWDEEL
Category:
Compact controller for volume flow rate. Regulation of a constant or variable volume flow rate setpoint. Electronic controller for applying a reference variable and tapping an actual value signal. The actual value signal relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified. Stand-alone operation or integration in central building management system.
Application: Dynamic transmitter for clean air in ventilation and air conditioning systems
Supply voltage: 24 V AC/DC
Actuator: Integrated; Slow running (running time 110 - 150 s for 90°)
Installation orientation: Any
Interface/Control: Analogue signal 0 - 10 V DC or 2 - 10 V DC or Belimo MP-Bus
Connection on: Connecting cable with 4 wires
Interface information:
Analogue: Volume flow rate setpoint and actual value signal. Actual signal factory volume flow rate; Actual signal can be reconfigured on the damper blade position by the customer
MP-Bus: Volume flow rate setpoint and actual value, damper position, error status, etc.
System connections:
MP-Bus for optional extensions:
- Suitable for TROX X-AIRCONTROL zone module X-AIR-ZMO-MP
- Gateways for LonWorks, Modbus, BACnet, EIB e.g. Belimo UK24xxx
- Fan optimiser e.g. Belimo COU24-A-MP
- in MP-Bus mode: Integration of a sensor or switch contact into the MP-Bus network
Special functions: Activation Vmin, Vmid, Vmax, Closed, Open by means of external switching contacts / wiring or MP-Bus
Optional activatable operating modes: Open loop: actuator with air flow measurement
Parameter settings:
- Parameters specific to the VAV terminal unit in the factory
- Operating values Vmin, Vmax parameterised at the factory
- Signal characteristic factory parameterised
Subsequent adaptation via optional tools:
- Adjustment device, PC software (wired)
- FlowCheck App (Wireless via integrated NFC interface)
Factory settings:
- Electronic controller factory-mounted on controller
- Factory parameterisation
- Functional test under air; certified with sticker

PRODUCT DATA
Luchthoeveelheid qv 270 m³/h
Statisch drukverschil Δpst 50 Pa
Aanstroomsnelheid v 6,31 m/s
Minimaal stastisch drukverschil Δpst,min 33 Pa
Stromingsgeluid Lp,A 41 dB(A)
Afgestraald geluid Lp,A 21 dB(A)
Systeemdemping stromingsgeluid ΔL1 *) 8 dB
Systeemdemping afgestraald geluid ΔL2 *) 9 dB
Volume flow rate tolerance [±%] Δqv 6

*) Opmerkingen
Systeemdemping stromingsgeluid ΔL1: Die Berechnung des Schalldruckpegels des Strömungsgeräusches erfolgte unter Berücksichtigung einer praxisgerechten Systemdämpfung. Diese Systemdämpfung ist die Summe der Korrekturwerte für eine Umlenkung, für die Verteilung im Luftleitungssystem, die Mündungsreflexion und die Raumdämpfung.
Systeemdemping afgestraald geluid ΔL2: Die Berechnung des Schalldruckpegels des Abstrahlgeräusches erfolgte unter Berücksichtigung einer praxisgerechten Systemdämpfung. Diese Systemdämpfung ist die Summe der Korrekturwerte für die Deckendämmung und die Raumdämpfung.

akoestische gegevens
Stromingsgeluid, geluidvermogen Afgestraald geluid, geluidvermogen
LW,A [dB(A)] 49 30
63Hz [dB] 63 29
125Hz [dB] 58 25
250Hz [dB] 52 26
500Hz [dB] 47 26
1kHz [dB] 36 27
2kHz [dB] 33 22
4kHz [dB] 28 16
8kHz [dB] 18 < 15
LW,NC [dB] 42 25
LW,NR [dB] 43 27

Manufacture of the planning: TROX
Type: LVC/125/BC0/V0/30-270m³/h