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Volume flow controller - static transducer

Volume flow controller - static transducer

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Safe position - spring return

Safe position - spring return

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XD4

Control component with static transducer and spring return actuator for VAV terminal units


Universal device for use with VAV terminal units

  • Controller and static differential pressure transducer in one casing
  • Separate actuator with spring return for adjustable safe position
  • Use in ventilation and air conditioning systems, with clean and contaminated air
  • Simple terminal connection without the use of additional junction boxes
  • Suitable for constant and variable volume flow rates
  • Activation of override controls via external switch contacts
  • Volume flow rates qvmin and qvmax are parameterised in the factory and saved in the controller
  • Change of operating parameters via adjustment devices and integrated display
  • Service access for manual adjustment devices and PC configuration software
  • Integrated display for volume flow rate display, operating mode display and setting of operating parameters

 


General information

Application

  • All-in-one control devices for VAV terminal units
  • Static differential pressure transducer and controller electronics combined in one casing
  • Separate actuator with spring return
  • Safe position in case of supply voltage failure or wire breakage can be defined in the order code:
    NC = damper CLOSED, NO = damper in OPEN position
  • For broader range of applications with clean and contaminated air, e.g. in the outlet area with dust and fluff
  • Suitable for different control tasks depending on the specification of the setpoint value
  • The room temperature controller, central BMS, air quality controller or similar units control the variable volume flow control by specifying setpoint values via analogue signal
  • Override controls for activating qvmin, qvmax, shut-off, OPEN position via switch or relay possible
  • Volume flow rate actual value is available as 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.
  • Volume flow rate range parameterised in the controller in the factory
    qvmin: minimum volume flow rate
    qvmax: maximum volume flow rate

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




Operating modes

Variable operation (V)

  • Setpoint value 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



Signal voltage ranges

  • 0 – 10 V DC
  • 2 – 10 V DC



Parts and characteristics

  • Transducer for static measurement principle
  • Overload protection
  • Terminal connection for supply line and controls
  • Socket plug for the actuator
  • Terminals with cover
  • Service interface
  • Manual actuator adjustment with crank handle
  • Raised actuator lockable with crank handle
  • Raised actuator unlockable with crank handle



Construction

GUAC-SM3 with spring return actuator 341C-024-05-V/ST06 for:

  • TVR, TZ-Silenzio, TA-Silenzio, TVZ, TVA
  • TVRK up to NW 250

GUAC-SM3 with spring return actuator 361C-024-20-V/ST06 for:

  • TVJ
  • TVT up to dimensions of 1000 x 600
  • TVRK from NW 315



Commissioning

  • Due to the volume flow rates set in the factory, always ensure that the control units are only installed in the specified locations
  • After successful installation and wiring the controller is ready for use
  • Operating parameters can be adjusted by the customer via adjustment device, controller potentiometers including display and PC software




Useful additions

  • Adjustment device type GUIV2-A (order code AT-VAV-G)


Information technique

Function, Specification text, Order code

  • Function
  • SPECIFICATION TEXT
  • ORDER CODE
Principle of operation Universal controller: TVR, TVJ, TVT, TZ-/TA-Silenzio, TVZ, TVA, TVRK XD4_gc_01ai.png

① Differential pressure transducer

② Actuator

③ Volume flow controller

④ Setpoint value signal


A closed control circuit for regulation of the volume flow rate, i.e. measuring - comparing - adjusting, is characteristic of air terminal units.
The volume flow rate is determined by measuring a differential pressure (effective pressure). This is done via a differential pressure sensor. An integrated differential pressure transducer converts the effective pressure into a voltage signal. The volume flow rate actual value is hence available as a voltage signal. Due to factory adjustment, 10 V DC always corresponds to the nominal volume flow (qvnom).
The volume flow rate setpoint value is specified by 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 volume flow rate setpoint value to the actual value and controls the external actuator accordingly. If the supply voltage is interrupted or the wire breaks, the spring return actuator moves to the fail-safe position OPEN (NO) or CLOSED (NC) as specified in the order code.


Category

  • Universal controller for volume flow rate with safe position




Application

  • Regulation of a constant or variable volume flow rate setpoint
  • Electronic controller for connecting a reference value and for 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




Area of application

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




Actuator

  • Spring return actuator for defined safe position of the damper blade in case of power failure
  • run time max. 150s for 90°; run time spring return <20s for 90




Installation orientation

  • either direction




Connection

  • Connection terminals




Supply voltage

  • 24 V AC/DC




Interface/signalling

  • Analogue signal 0 – 10 V DC or 2 – 10 V DC




Interface information

  • Analogue: Volume flow setpoint and actual value




Special functions

  • Display for duct pressure actual value display and parameterisation.
  • Activation Vmin, Vmax, closed, open by external switch contacts/circuitry




Parameter setting

  • Parameters specific to VAV terminal unit parameterised at the factory
  • Operating values Vmin, Vmax factory parameterised
  • Signal characteristic factory parameterised
  • Subsequent adjustment directly via control elements and display on the controller or by means of optional tools: adjustment device, PC software (wired in each case)




Factory condition

  • Electronic controller factory-mounted on the terminal unit
  • Factory parameter settings
  • Functional test under air, certified with sticker


TVRD / 200 / D2 / XD4 / V0 / qvminqvmaxm³/h / NC
||||||||||
1256789101112

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, 315, 400 

6 Accessories

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

7 Attachments (control component)
XD4 Universal controller with static transducer 

8 Operating mode

F Constant value (a 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 unit
m³/h
l/s 

12 Damper blade position
NO Power off to OPEN

NC Power off to CLOSE


Order example: TVR/100/D2/XD4/V0/50-354 m³/h/NC
Acoustic claddingWithout
MaterialGalvanised sheet steel
Nominal size100 mm
AccessoriesDouble lip seal both sides
AttachmentUniversal controller, static transducer, spring return actuator
Operating modeVariable operation – signal voltage range 0 –10 V DC
Volume flow rate50 – 354 m³/h
Damper blade positionNC Normally CLOSED
 

Variants

  • VARIANTS

Technical data, Product details

  • TECHNICAL DATA, PRODUCT DETAILS

Universal controller for VAV terminal units

Controllers

Spring return actuator

Order code detail

Part numberTypePart numberType

VAV terminal units

XD4A00000038353GUAC-SM3A00000038357

341C-024-05-V/ST06





XD4A00000038353GUAC-SM3A00000038355

361C-024-20-V/ST06





① TVR, TZ-Silenzio, TA-Silenzio, TVZ, TVA, TVRK up to NW 250

② TVJ, TVT up to dimensions 1000 x 500, TVRK from NW 315

 

 

 





Universal controller XD4, type GUAC-SM3 for VAV terminal units


Supply voltage24 V AC ± 20%, 50/60 Hz
Supply voltage (DC)24 V DC ± 20 %
Power rating (AC)

1.3 VA plus actuator used *


Power rating (DC)

0.6 W plus actuator used *




Input setpoint value signal or override control




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, max. 0,5 mA


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

400 g



* When dimensioning the transformers and the supply cable for the universal controller, the power consumption of the associated actuator must be taken into account.
** Input can be connected to supply voltage as part of override control.








Actuator with spring return 341C-024-05-V/ST06


Supply voltageFrom the controller
Power consumption motor (movement)

5.0 W


Standby power consumption (end position)

2.0 W


Rating



7.5 VA


Torque

5 Nm


Run time for 90°

100 s


Spring return time

< 20 s


Setpoint value signal inputFrom the controller
IEC protection classIII (protective extra-low voltage)
Protection levelIP 54 (cable entry at the bottom)
EC conformityEMC to 2014/30/EU
Weight

1.3 kg





Actuator with spring return 361C-024-20V/ST06

Supply voltageFrom the controller
Power consumption motor (movement)

8.0 W


Standby power consumption (end position)

2.0 W


Rating



11.5 VA


Torque

20 Nm


Run time for 90°

150 s


Spring return time

< 20 s


Setpoint value signal inputFrom the controller
IEC protection classIII (protective extra-low voltage)
Protection level

IP 54

EC conformityEMC to 2014/30/EU
Weight

1.6 kg




 



 

 


Display range of functions

Display functions

  • Volume flow rate actual value (unit optionally m³/h, l/s)
  • Display via 3-character display with position valuation labelling (upstroke symbolises thousands of digits)
  • Status and error display for various operating modes, including display of activated override control, display of diagnostic function
  • Display of the firmware version

 

Setting options

  • Unit of the volume flow rate display m³/h or l/s
  • Work areas qvmin, qvmax
  • Signal voltage range 0 - 10 V or 2 - 10 V DC

 

Diagnostic function

  • Activation of override controls OPEN, CLOSED, qvmin, qvmax, motor stop

 

Commissioning

  • On-site adjusting is not required
  • Due to the volume flow rates set in the factory, always ensure that the control units are only installed in the specified locations
  • After successful installation and wiring the controller is ready for use
  • Comply with the volume flow control range of the volume flow controller, in particular do not fall below the technically minimum volume flow rate
  • Only briefly remove the protective cap of the control component during wiring


Product details

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

The analogue interface can be adjusted for the signal voltage range 0 – 10 V DC or 2 – 10 V DC. The assignment of the volume flowrate setpoint value or actual value for voltage signals is shown in the characteristic curves.

  • The set signal voltage range is always equally valid for setpoint value and actual value signals.
  • The signal voltage range is pre-set in the factory in accordance with the order code entries.
  • Signal voltage range can be adjusted on site in the adjustment menu on the display, via adjustment device or PC software.



Setpoint value setting

  • In the operating mode V (variable operation), the setpoint value is specified with an analogue signal on terminal Y.
  • The selected signal voltage range 0 – 10V or 2 – 10V DC is assigned to the volume flow rate range qvmin – qvmax a change packet.
  • Volume flow rate range qvmin – qvmax pre-set in the factory according to the order code entries.
  • Subsequent adjustment of qvmin or qvmax on the display, via adjustment device or PC software.


  • In the operating mode F (constant value mode), an analogue signal is not required on terminal Y.
  • It is controlled by the volume flow rate constant value set by qvmin set volume flow rate constant value regulated.
  • Volume flow rate qvmin is pre-set in the factory according to the order code entry.
  • Subsequent adjustment of qvmin on the display, via adjustment device or PC software.


Actual value as feedback for monitoring or tracking control

  • On terminal U, the actual volume flow rate measured by the controller can be tapped as a voltage signal.
  • The selected signal voltage range 0 – 10 V DC or 2 – 10 V DC is shown in the volume flow rate range 0 – qvnom shown.


Override control

For special operating situations, the volume flow controller can be put in a special operating mode (override control). The followingare 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 wiringwith external switch contacts/relays. OPEN and CLOSED are only available if the controller is supplied with alternating current (AC).


Override control CLOSED via control signal Y

  • With signal voltage range 0 – 10V DC: CLOSED is activated when qvmin = 0 is set and the control signal is Y < 0.5V DC.
  •  With signal voltage range 2 – 10 V DC: CLOSED is activated when control signal is Y < 0.8 V DC. 0.8 V = factory setting 
  • The specified switching point of 0.8 V corresponds here to the factory default setting.


Override control for diagnostic purposes 

  • For test purposes, the override control can also be activated via the built-in display, a adjustment device or the PC software.


Prioritisation of various setting options 


  • High priority: specifications via the display, adjustment device or PC software 
  • Low priority: settings via wiring on the Y signal input of the controller

Spring return actuator 

  • The spring return function in case of power failure is prepared at the factory according to the order option. NC = damper CLOSED, NO = damper OPEN. This function cannot be set by the customer by parameterisation using service tools.


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