XD0 - Volume flow | TROX GmbH
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XD0 for TVR, TVJ, TVT, TZ-SILENZIO, TASILENZIO, TVZ, TVA, TVRK

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Volume flow controller – static transducer

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XD0   

Control component for VAV terminal unit with static transducer


Compact device for use with VAV terminal units

  • Controller, static effective pressure transducer and actuator in one casing
  • Use in ventilation and air conditioning systems, with clean and contaminated air
  • Suitable for constant and variable volume flows
  • Activation of override controls by means of external switch contacts
  • Volume flow rates qvmin and qvmax are factory set and stored in the controller
  • Change of operating parameters by means of adjustment device
  • Service access for manual adjustment devices and PC configuration software

 


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General information

Application

  • All-in-one control devices for VAV terminal units
  • Static differential pressure transducer, electronic controller, and actuator are fitted together in one casing
  • For a wider range of applications with clean and contaminated air, e.g. for extract air with dust or fluff
  • Choice of 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 volume flow rate actual value is available as a linear voltage signal



Control strategy

  • The volume flow controller works independent 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.
  • The flow rate range for the controller is set in the factory
    qvmin: minimum volume flow rate
    qvmax: maximum volume flow rate

  • Operating parameters are set in the factory according to the order code




Operating modes

  • Variable or constant value
  • Variable operation (V)
  • Setpoint value default setting via analogue interface
    • Signal voltage range corresponds to qvmin to qvmax
  • Constant value mode (F)
    • A setpoint signal is not required, setpoint value corresponds to qvmin



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 for static pressure measurements
  • Overload protection
  • Release button to allow for manual operation
  • Connecting cable with 4 wires, approx. 0.9 m, halogen-free
  • Service interface



Construction

227V-024-15-DS3 for volume flow controller

  • TVR, TVJ, TZ-Silenzio, TA-Silenzio, TVZ, TVA, TVRK
  • TVT (up to 1000 × 500 mm)



Commissioning

  • As the volume flow rates are factory set, the terminal units have to be installed at the specified locations
  • After successful installation and wiring, the controller is ready for use
  • Operating parameters can be adjusted by others using the adjustment device




Useful additions

  • Adjustment device GUIV-A (order code AT-VAV-G)


Technical information

Function, Specification text, Order code

  • Function
  • SPECIFICATION TEXT
  • ORDER CODE
      Principle of operation – Type 227V-024-15-DS3 (TVT, TVJ, TZ-Silenzio, TA-Silenzio, TVZ, TVA, TVRK) XD0_Funcional_graphic_1ai.png

① Differential pressure transducer

② Actuator

③ Volume flow controller

④ Setpoint value signal


VAV terminal units control the volume flow in a closed loop, i.e. measurement – comparison – correction.
For volume flow rate measurement the effective pressure is measured first. This is done with a differential pressure sensor. The integral differential pressure transducer transforms the effective pressure into a voltage signal. The volume flow rate actual value is available as a voltage signal. The factory setting is such that 10 V DC always corresponds to the nominal flow rate (qvnom).
The volume flow rate setpoint value comes from a higher-level controller (e.g. room temperature controller, air quality controller, central BMS). Variable volume flow control results in a value between qvmin and qvmax. It is possible to override the room temperature control, e.g. by a complete shut-off of the duct.
The controller compares the differential pressure setpoint value to the actual value and controls the actuator accordingly if there is a difference.


Category

  • Compact controller for volume flow control
  • Control of a constant or variable volume flow rate setpoint
  • Electronic controller for applying a reference value and capturing an actual value
  • The actual value relates to the nominal volume flow rate such that commissioning and subsequent adjustment are simplified
  • Stand-alone operation or integration with a central BMS



Application

  • Static transducer for contaminated air in ventilation and air conditioning systems


Supply voltage

  • 24 V AC/DC



Actuator

  • Integral; slow-running (run time < 150 s for 90°)


Installation orientation

  • Either direction


Interface/signalling

  • Analogue signals (0 – 10 V or 2 – 10 V DC)


Connection

  • Connecting cable with 4 wires


Interface information

Analogue:

  • Volume flow rate actual value and setpoint value
  • Flow rate actual value: factory set
  • The flow rate actual value cannot be adjusted by adjusting the damper blade position


Special functions

  • Activation of qvmin, qvmax, CLOSED and OPEN by means of external switch contacts


Parameter setting

  • Parameters specific to the VAV terminal unit are factory set
  • Operating values: qvmin, qvmax andinterface type are factory set
  • Subsequent adjustment using optional tools: adjustment device, PC software (wired in each case)


Factory condition

  • Electronic controller is factory mounted on the control unit
  • Factory-set parameters
  • Functional test with air (see sticker)

TVRD / 200 / D2 / XD0 / V0 / qvminqvmaxm³/h
|||||||||
12567891011

1 Type

TVR VAV terminal unit 

2 Acoustic cladding
No entry: none
D With acoustic cladding 

3 Material
Galvanised sheet steel (standard construction)
P1 Powder-coated RAL 7001, silver grey
A2 Stainless steel construction 

5 Nominal size [mm]
100, 125 , 160, 200, 250 

6 Accessories
No entry: none
D2 Double lip seal both ends
G2 Matching flanges for both ends 

7 Attachments (control components)
XD0  Compact controller with static transducer 

8 Operating mode
F Constant value (one setpoint value)
V Variable (setpoint value range) 

9 Signal voltage range
0 0 – 10 V DC
2 2 – 10 V DC 

10 Operating values for factory setting
Volume flow rates in m³/h or l/s
qvconst (only with operating mode F)
qvmin (only with operating mode V)
qvmax (only with operating mode V) 

11 Volume flow rate unit
m³/h
l/s


Order example: TVR/100/D2/XD0/V0/50-354 m³/h

Acoustic claddingWithout
MaterialGalvanised sheet steel
Nominal size100 mm
AccessoriesDouble lip seal both ends
AttachmentCompact controller with static transducer
Operating modeVariable operation – signal voltage range 0 –10 V DC
Volume flow rate50 – 354 m³/h
  

Variants

  • VARIANTS


Technical data, Product details

  • TECHNICAL DATA, PRODUCT DETAILS

Compact controller for VAV terminal units




VAV terminal units


Type of installation componentPart number


TVR, TVJ, TVT, TZ-Silenzio, TA-Silenzio, TVZ, TVA, TVRK


227V-024-15-DS3

A00000038351



Compact controller 227V-024-15-DS3

Measurement principleStatic
Supply voltage (AC)24 V AC ± 20%, 50/60 Hz
Supply voltage (DC)24 V DC ± 20 %
Power rating (AC)3.5 VA max.
Power rating (DC)2 W max.
Power consumption (when running/when idle)

1.0 W


Torque15 Nm
Run time for 90°

approx. 150 s


Setpoint value signal input

0 – 10 V DC, Ra > 100 kΩ or 2 – 10 V DC, Ra > 50 kΩ


Actual value signal output

0 – 10 V DC or 2 – 10 V DC, 0.5 mA max.


Connection

Cable 4 × 0.75 mm²


IEC protection classIII (protective extra-low voltage)
Protection levelIP 42
EC conformityEMC to 2014/30/EU
Weight

0.45 kg



Product details

Analogue interface 0 – 10 V or 2 – 10 V DC (operating mode V, F)

The analogue interface can be set for signal voltage range 0 – 10 V DC or 2 – 10 V DC. The assignment of the volume flow rate setpoint value or actual value to a voltage signal is shown in the characteristic curves.

  • The set signal voltage range applies to both setpoint value and actual value signals.
  • The signal voltage range is set in the factory according to the order code
  • The signal voltage range can be adjusted with an adjustment device (by others)


Setpoint value default setting

Operating mode V (variable operation)

  • The setpoint comes from an analogue signal on terminal Y
  • The selected signal voltage range 0 – 10V or 2 – 10V DC is mapped to the volume flow rate range qvmin – qvmax
  • Volume flow rate range qvmin – qvmax is set in the factory according to the order code
  • Subsequent adjustment of qvmin or qvmax is possible with an adjustment device


Operating mode F (constant value mode)

  • No analogue signal required at terminal Y
  • The set flow rate constant value qvmin is used
  • Volume flow rate qvmin is set in the factory according to the order code
  • Subsequent adjustment of qvmin is possible with an adjustment device



Actual value as feedback for monitoring or tracking control

  • The actual volume flow rate measured by the controller can be captured as a voltage signal at terminal U
  • The selected signal voltage range 0 – 10 V DC or 2 – 10 V DC is mapped to the volume flow rate range 0 – qvnom


Override control

For special operating situations, the volume flow controller can be put in a special operating mode (override control). The following modes are possible: control qvmin, control qvmax, damper blade in the OPEN position or damper blade CLOSED.

Override control via signal input Y

With appropriate wiring on the signal input Y, the override controls can be activated according to the connection diagrams via wiring with external switch contacts/relays. OPEN and CLOSE are only available if the controller is supplied with alternating current (AC).

Override control CLOSE using control signal on Y

  • With signal voltage range 0 – 10 V DC: CLOSE is activated if qvmin = 0 and the control signal on Y < 0.5 V DC
  • With signal voltage range 2 – 10V DC: CLOSE is activated if the control signal is Y < 0.8V (*1) DC (*1) 0.8 V = factory setting


Override control for diagnosis

  • For test purposes, override control can also be activated with the service tools (adjustment device, PC software)


Priority of the various setting options

  • High priority: Default value setting using the service connector (adjustment device, PC software) for test purposes
  • Low priority: Default value setting using the Y signal input on the controller


Commissioning

  • On-site adjusting is not required
  • As the volume flow rates are factory set, the terminal units have to be installed at the specified locations
  • After successful installation and wiring, the controller is ready for use
  • Comply with the volume flow rate control ranges of the VAV terminal units, do not set a volume flow rate which is below the minimum flow rate

Downloads

product information

certificates

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Thank you for your message!

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Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265