Type Universal, dynamic

For different actuators

Modular control components for VAV terminal units

  • Module selection based on application
  • Actuators with selected actuator forces

Options

  • Actuators with safety function for 'damper blade OPEN' and 'damper blade CLOSED' (spring return actuators)

Universal controller VRD3 00131918_0


  • Application
  • Description

Application

  • Electronic volume flow controllers of Type Universal (dynamic) are designed for use with VAV terminal units.
  • Dynamic differential pressure transducer and electronic controller are fitted together in one casing
  • Actuator or spring return actuator is separate
  • The output signals of the room temperature controller, central BMS, air quality controller or similar units control the volume flow rate setpoint
  • Override control by means of switches or relays
  • Volume flow rate actual value is available as linear voltage signal
  • Controller parameters are factory set
  • On-site adjusting is not required

Standard filtration in comfort air conditioning systems allows for use of the controller in the supply air without additional dust protection. Since a partial volume flow is passed through the transducer in order to measure the volume flow rate, please note:

  • With heavy dust levels in the room, suitable extract air filters must be provided.
  • If the air is polluted with fluff or sticky particles or contains aggressive media, Universal (dynamic) controllers cannot be used

Parts and characteristics

  • Sensor for dynamic differential pressure measurements
  • Separate actuator
  • Mechanical stops for limiting the damper blade positions
  • Actuators with overload protection
  • Release button to allow for manual operation

Technische Information

Function, Produktbeziehungen

  • Function
Principle of operation – Universal 00134465_0
① Differential pressure transducer
② Actuator
③ Volume flow controller
④ Setpoint value signal


Functional description

VAV terminal units control the volume flow in a closed loop, i.e. measurement – comparison – control.

The volume flow rate is determined by measuring the differential pressure (effective pressure). For this purpose the VAV terminal unit is fitted with a differential pressure sensor.

The integral differental pressure transducer transforms the effective pressure into a voltage signal. The volume flow rate actual value is hence available as a voltage signal. The factory setting is such that 10 V DC always corresponds to the nominal volume flow rate (Vnom).

The volume flow rate setpoint value comes from a higher-level controller (e.g. room temperature controller, air quality controller, central BMS) or from switch contacts. Variable volume flow control results in a value between Vmin and Vmax. 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 integral actuator accordingly.

The volume flow rate parameters Vmin and Vmax are factory set on potentiometers. Voltage ranges are factory stored in the controller. Changes on the customer's site can easily be carried out using an adjustment device or a notebook with service tool.

Volume flow control

  • 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 factory set volume flow rate parameters can be altered by the customer

Variants, MP bus/Analogue, Analogue

  • Variants
  • MP bus/Analogue
  • Analogue

Any attachments are to be defined with the order code of the VAV terminal unit.

Universal controller, dynamic, for VAV terminal units

Order code detail Controller Actuator Type of VAV terminal unit
Order code detail Part number Type Part number Type

B13

M546GA4

VRD3

M466DJ8

NM24A-V

① ② ④

B11

M546GA4

VRD3

M466DG8

SM24A-V

B1B

M546GA4

VRD3

M466DR1

NF24A-V (spring return actuator)

① ② ③ ④

B27

M546GA4

VRD3

M466DJ8

NM24A-V

XC3

M546ED4

GUAC-D3

A00000051738

361C-024-20-V/ST07 (spring return actuator)

① ② ③ ④

① TVR

② TVJ

③ TVT

④ TZ-Silenzio, TA-Silenzio, TVZ, TVA

⑤ TVM


Application

  • Electronic volume flow controller VRD3 as Universal controller
  • Variable air or constant air volume flow control
  • The flow rate is measured using the dynamic measurement principle
  • Voltage range for the actual and setpoint value signals 0 – 10 V DC or 2 – 10 V DC
  • Separate inputs for override controls enable the centralised switching of groups of controllers

Construction

Volume flow controller VRD3 with

  • B13: Actuator NM24A-V for TVR, TVJ, TZ-Silenzio, TA-Silenzio TVZ, TVA
  • B11: Actuator SM24A-V for TVT
  • B1B: Spring return actuator NF24A-V for TVR, TVJ, TVT, TZ-Silenzio, TA-Silenzio TVZ, TVA
  • B27: Actuator NM24A-V for TVM

Signal voltage range

  • 0: 0 – 10 V DC
  • 2: 2 – 10 V DC with shut-off function (< 0.1 V DC)

Operating modes

E: Single and M: Master

  • Vmin: Minimum volume flow rate
  • Vmax: Maximum volume flow rate


S: Slave operation

  • Vmin: 0 %
  • Vmax: Volume flow rate ratio to the master controller


F: Constant value

  • Vmin: constant volume flow rate
  • Vmax: 100 %


Parameters are factory set. The customer defines the required operating mode and the volume flow rates in the order code at the time of ordering. The jumper for input w is factory set to VRD3.

Commissioning

  • On-site adjusting is not required
  • When installing the VAV terminal units it is important to assign each room the correct unit based on the ordered volume flow rates
  • After successful installation and wiring the controller is ready for use
  • The volume flow rate parameters Vmin and Vmax can be adjusted at a later stage using a potentiometer or an adjustment device

Volume flow controller VRD3

Supply voltage (AC)

24 V AC ± 20 %, 50/60 Hz

Supply voltage (DC)

24 V DC −10/+20 %

Power rating (AC)

without actuator max. 3.5 VA

Power rating (DC)

without actuator max. 2 W

Setpoint value signal input

0 – 10 V DC, Ra > 100 kΩ

Actual value signal output

0 – 10 V DC, 0.5 mA max.

IEC protection class

III (protective extra-low voltage)

Protection level

IP 40

EC conformity

EMC according to 2014/30/EU

Weight

0.440 kg


Actuators NM24A-V and NM24A-V-ST

Supply voltage

from the controller

Power rating (AC)

6 VA max.

Power rating (DC)

3.5 W max.

Torque

10 Nm

Running time for 90°

150 s

Control signal

from the controller

IEC protection class

III (protective extra-low voltage)

Protection level

IP 54

EC conformity

EMC according to 2014/30/EU

Weight

0.710 kg


Actuators SM24A-V and SM24A-V-ST

Supply voltage

from the controller

Power rating (AC)

6 VA max.

Power rating (DC)

4 W max.

Torque

20 Nm

Running time for 90°

150 s

Control signal

from the controller

IEC protection class

III (protective extra-low voltage)

Protection level

IP 54

EC conformity

EMC according to 2014/30/EU

Weight

0.910 kg


Spring return actuators NF24A-V and NF24A-V-ST

Supply voltage

from the controller

Power rating (AC)

9 VA max.

Power rating (DC)

6.5 W max.

Torque

10 Nm

Running time for 90°

200 – 300 s

Spring return time

< 20 s

Control signal

from the controller

IEC protection class

III (protective extra-low voltage)

Protection level

IP 54

EC conformity

EMC according to 2014/30/EU

Weight

1.91 kg


Application

  • Electronic volume flow controller GUAC-D3 as Universal controller
  • Variable air or constant air volume flow control
  • The flow rate is measured using the dynamic measurement principle
  • Voltage range for the actual and setpoint value signals 0 – 10 V DC or 2 – 10 V DC

Construction

XC3: Volume flow controller GUAC-D3 with spring return actuator 361C-024-20-V/ST07 for TVR, TVJ, TVT, TZ-Silenzio, TA-Silenzio, TVZ, TVA

Signal voltage range

  • 0: 0 – 10 V DC
  • 2: 2 – 10 V DC with shut-off function (< 0.8 V DC)

Operating modes

E: Single and M: Master

  • Vmin: Minimum volume flow rate
  • Vmax: Maximum volume flow rate


S: Slave operation

  • Vmin: 0 %
  • Vmax: Volume flow rate ratio to the master controller


F: Constant value

  • Vmin: constant volume flow rate
  • Vmax: 100 %


Parameters are factory set. The customer defines the required operating mode and the volume flow rates in the order code at the time of ordering.

Commissioning

  • On-site adjusting is not required
  • When installing the VAV terminal units it is important to assign each room the correct unit based on the ordered volume flow rates
  • After successful installation and wiring the controller is ready for use
  • The volume flow rate parameters Vmin and Vmax can be adjusted at a later stage using a potentiometer or an adjustment device

Volume flow controller GUAC-D3

Supply voltage (AC)

24 V AC ± 20 %, 50/60 Hz

Supply voltage (DC)

24 V DC ± 20 %

Power rating (AC)

without actuator max. 1.2 VA

Power rating (DC)

without actuator max. 0.6 W

Setpoint value signal input

0 – 10 V DC, Ra > 100 kΩ

Actual value signal output

0 – 10 V DC, 0.5 mA max.

IEC protection class

III (protective extra-low voltage)

Protection level

IP 42

EC conformity

EMC according to 2014/30/EU


Spring return actuator 361C-024-20-V

Supply voltage

from the controller

Power rating (AC)

10 VA max.

Power rating (DC)

8 W max.

Torque

20 Nm

Running time for 90°

150 s

Spring return time

< 15 s

Control signal

from the controller

IEC protection class

III (protective extra-low voltage)

Protection level

IP 54 (cable entry at the bottom)

EC conformity

EMC according to 2014/30/EU

Weight

1.8 kg


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Per domande di carattere generale riguardanti i nostri prodotti o servizi, è possibile contattare:
Tel.: +41 26 425 59 00 | Fax: +41 55 250 73 10 | Fax Fribourg: +41 26 425 59 01