XB0

Application

• All-in-one control devices for VAV terminal units

• Dynamic effective pressure transducer, electronic controller and actuator are fitted together in one casing
• Dynamic differential pressure transducer for clean air in ventilation and air-conditioning systems
• Various control options based on setpoint value default setting
• Volume flow rate control is based on setpoint values received from room temperature controller, central BMS, air quality controller or other devices as an analogue signal.
• Override controls for activating qvmin, qvmax, shut-off or OPEN position can be set with a switch or relay
• The actual volume flow rate value is available as a linear voltage signal

• Use Compact controller XS0 or XD0 with static effective pressure transducer instead of the Compact controller XB0 described here
• XS0 (for TVE and TVE-Q series)
• XD0 (for TVR, TVJ, TVT, TZ-Silenzio, TA-Silenzio, TVZ, TVA, TVRK)

Control strategy

• The volume flow controller works dependently of the duct pressure
• Differential pressure fluctuations do not result in permanent volume flow rate changes
• To prevent the control from becoming unstable, a dead band is allowed within which the damper blade does not move

• Flow rate range in the controller set in the factory

• q_vmin: Minimum volume flow rate
• q_vmax: Maximum volume flow rate

• Operating parameters are specified via the order code and set in the factory

Operating modes

• Variable or constant value

Variable operation (V)

• Setpoint value default setting via analogue interface
• Signal voltage range corresponds to q_vmin to q_vmax

Constant value mode (F)

• A setpoint signal is not required, setpoint value corresponds to q_vmin

Interface

Analogue interface with adjustable signal voltage range

• Analogue signal for volume flow rate setpoint value
• Analogue signal for volume flow rate actual value (factory setting), alternatively: analogue signal for damper blade position (adjustment by others required)

Signal voltage ranges

• 0 – 10 V DC
• 2 – 10 V DC

Parts and characteristics

• Transducer based on dynamic measuring principle. It can 

  only be used with clean air, as a partial volume flow is passed through the transducer
• Actuators with overload protection
• Release button to allow for manual operation (only 227V-024-10-DD3)
• Connecting cable with 4 wires, approx. 0.9 m, halogen-free (only 227V-024-10-DD3)
• Terminals with cover (only TR0V-024T-05I-DD15)
• Service interface

 Construction

• Type 227V-024-10-DD3 for TVR
• Type 227V-024-10-DD3 for TVJ
• Type 227V-024-10-DD3 for TVT up to 1000x300 or 800x400
• Type 227V-024-10-DD3 for TZ-Silenzio, TA-Silenzio
• Type 227V-024-10-DD3 for TVZ, TVA
• Type 227V-024-10-DD3 for TVM
• Type TR0V-024T-05I-DD15 for TVE

Commissioning

• Due to the volume flow rates set at the factory, always ensure that the terminal units are only installed at the specified locations
• After successful installation and wiring, the controller is ready for use
• Operating parameters can be adjusted by the customer (via the adjustment device)

Useful additions

• Adjustment device GUIV-A (order code AT-VAV-G) for 227V-024-10-DD3
• Adjustment device GUIV3-M (order code AT-VAV-G3) for TR0V-024T-05I-DD15