XD0

XD0 for TVR, TVJ, TVT, TZ-SILENZIO, TASILENZIO, TVZ, TVA, TVRK

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 q_vmin and q_vmax 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

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 q_vmin, q_vmax, 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
q_vmin: minimum volume flow rate
q_vmax: 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 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 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)

Technické údaje

Function, Specification text, Order code

Principle of operation – Type 227V-024-15-DS3 (TVT, TVJ, TZ-Silenzio, TA-Silenzio, TVZ, TVA, TVRK)

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 (q_vnom).
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 q_vmin and q_vmax. 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 q_vmin, q_vmax, CLOSED and OPEN by means of external switch contacts

Parameter setting

Parameters specific to the VAV terminal unit are factory set
Operating values: q_vmin, q_vmaxand_{interface 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)

TVR

–

200

XD0

qvmin

–

qvmax

m³/h

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
q_vconst (only with operating mode F)
q_vmin (only with operating mode V)
q_vmax (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 cladding	Without
Material	Galvanised sheet steel
Nominal size	100 mm
Accessories	Double lip seal both ends
Attachment	Compact controller with static transducer
Operating mode	Variable operation – signal voltage range 0 –10 V DC
Volume flow rate	50 – 354 m³/h

Variants

Compact controller XD0, 227V-024-10-DS3

① Compact controller
② Connections for effective pressure transducer
③ Service tool connection
④ Connecting cable
⑤ Gear release button

Technical data, Product details

XD0 for TVR, TVJ, TVT, TZ-SILENZIO, TASILENZIO, TVZ, TVA, TVRK

Compact controller for VAV terminal units

VAV terminal units	Type of installation component	Part number
TVR, TVJ, TVT, TZ-Silenzio, TA-Silenzio, TVZ, TVA, TVRK	227V-024-15-DS3	A00000038351

Compact controller 227V-024-15-DS3

Measurement principle	Static
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
Torque	15 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 class	III (protective extra-low voltage)
Protection level	IP 42
EC conformity	EMC 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

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XD0