Type RFD-SIRIUS

RFD-SIRIUS is an air terminal device combined with a VAV terminal unit

RFD-SIRIUS is used in ventilation and air conditioning systems for the demand-based volume flow control and as an air terminal device.

  • RFD nominal sizes: 160, 200, 250, 315 and 400
  • SIRIUS nominal sizes: 125, 160, 200 and 250
  • Volume flow rate range: 4.7 to 171.3 l/s or 17 to 617 m³/h
  • For supply air
  • Flush ceiling installation, with discharge nozzle also suspended installation
  • Control input signal via MP bus, LonWorks FTT-10A, Modbus RTU, or analogue signal
  • Integral noise insulation element
  • High induction results in a rapid reduction of the temperature difference and airflow velocity
  • Ideal for comfort zones


Optional equipment and accessories

  • Exposed diffuser face available in RAL CLASSIC colours
RFD-SIRIUS 00258902_0


  • Application
  • Description

Application

  • For supplying air to comfort zones in cases where the supply air flow rate is to be controlled
  • The variant with discharge nozzle allows for suspended installation
  • The efficient swirl creates high induction levels, thereby rapidly reducing the temperature difference and airflow velocity
  • Closed-loop volume flow control using an external power supply
  • Differential pressure measurement with integral measuring tubes

Special characteristics

  • RFD-SIRIUS combines the functions of a volume flow controller, sound attenuator, plenum box and air terminal device in one unit.
  • Low sound power level, ideal for comfort zones
  • For all types of ceiling systems, also suitable for freely suspended installation
  • Differential pressure measurement with integral measuring tubes

Nominal sizes

  • RFD: 160, 200, 250, 315 und 400
  • SIRIUS: 125, 160, 200 and 250

Variants

Diffuser face

  • RFD-R: Circular diffuser face
  • RFD-Q: Square diffuser face
  • RFD-*-D: Diffuser face with discharge nozzle


Control components

  • BC0
  • BL0
  • BM0
  • BM0-J6


For information on control components see Type Compact controllers.

Parts and characteristics

  • Circular or square diffuser face
  • Diffuser face with radially arranged fixed air control blades
  • Control component can be moved back and forth

Attachments

Variable volume flow control with electronic Compact controller to switch an external control signal and an actual value signal for integration into the central BMS.

  • Supply voltage 24 V AC/DC
  • The signal interface depends on the selected control component variant
  • Variable air or constant air volume flow control
  • The flow rate is measured according to the dynamic measurement principle
  • Volume flow rate control range: approx. 10 – 100 % of the nominal volume flow rate


Deviation from the operating range:

  • 10 – 20% of the nominal volume flow rate: +/- 25%
  • 20 – 40% of the nominal volume flow rate: +/- 10%
  • 40 – 100% of the nominal volume flow rate: +/- 4%


Electrical connection with cable or plug, depending on the selected control component variant.

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180

Materials and surfaces

  • Diffuser face and plenum box made of galvanised sheet steel
  • Measuring unit made of aluminium
  • Exposed parts of the diffuser face powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour
  • Noise insulating fleece on the controller cage

Standards and guidelines

  • Sound power level of the air-regenerated noise measured according to EN ISO 5135
  • Hygiene conforms to VDI 6022

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Inspection and cleaning to VDI 6022

Technische Information

Function, Technical data, Quick sizing, Specification text, Order code

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code

Functional description

RFD-SIRIUS combines the functions of a volume flow controller, sound attenuator, plenum box and air terminal device in one unit.

The differential pressure is measured with integral measuring tubes and transmitted to the controller.

An integral linear actuator adjusts the damper blade such that the required setpoint value is achieved.

The construction of the diffuser ensures that sound is effectively absorbed, which results in low sound power levels.

RFD nominal sizes

160, 200, 250, 315, 400 mm

SIRIUS nominal sizes

125, 160, 200, 250 mm

Volume flow rate

4.7 – 171.4 l/s or 17 – 617 m³/h

Supply air to room air temperature difference

–12 to +10 K


Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.

The minimum volume flow rates apply to a supply air to room air temperature difference of –6 K.

The maximum volume flow rates apply to a sound power level of approx. 50 dB (A).

Sound power level [dB (A)] – RFD-SIRIUS

CombinationVΔpt
Combinationl/sm³/h    Pa
Combinationl/sm³/h    50100200300 

RFD-160 SIRIUS 125

5

17

≤15

≤15

≤15

15

RFD-160 SIRIUS 125

14

52

25

27

29

30

RFD-160 SIRIUS 125

24

87

32

34

36

37

RFD-160 SIRIUS 125

34

123

36

38

40

42

RFD-200 SIRIUS 125

7

25

15

17

20

22

RFD-200 SIRIUS 125

22

80

25

28

31

33

RFD-200 SIRIUS 125

37

134

30

33

36

38

RFD-200 SIRIUS 125

53

189

33

36

39

41

RFD-200 SIRIUS 160

7

25

≤15

15

18

20

RFD-200 SIRIUS 160

25

90

25

29

32

33

RFD-200 SIRIUS 160

43

155

31

34

37

39

RFD-200 SIRIUS 160

61

219

38

41

43

RFD-250 SIRIUS 160

10

37

≤15

15

18

20

RFD-250 SIRIUS 160

34

121

23

26

29

31

RFD-250 SIRIUS 160

57

204

27

31

34

35

RFD-250 SIRIUS 160

80

288

31

34

37

39

RFD-250 SIRIUS 200

10

37

20

24

28

30

RFD-250 SIRIUS 200

39

141

28

32

36

38

RFD-250 SIRIUS 200

68

245

31

35

39

41

RFD-250 SIRIUS 200

97

349

37

41

43

RFD-315 SIRIUS 200

19

68

27

31

36

39

RFD-315 SIRIUS 200

50

180

29

34

39

42

RFD-315 SIRIUS 200

81

292

31

35

40

43

RFD-315 SIRIUS 200

112   

404

32

36

41

44

RFD-315 SIRIUS 250

19

68

18

22

26

28

RFD-315 SIRIUS 250

52

187

26

30

34

36

RFD-315 SIRIUS 250

85

305

30

34

38

40

RFD-315 SIRIUS 250

118   

424

32

36

40

42

RFD-400 SIRIUS 250

27

96

24

29

33

36

RFD-400 SIRIUS 250

73

263

29

33

38

40

RFD-400 SIRIUS 250

119   

429

31

35

40

42

RFD-400 SIRIUS 250

166   

596

32

36

41

44


Sound power level [dB (A)] – RFD-SIRIUS-D

CombinationVΔpt
Combinationl/sm³/h    Pa
Combinationl/sm³/h    50100 200 300 

RFD-D-160 SIRIUS 125

6

23

22

24

27

28

RFD-D-160 SIRIUS 125

20

72

29

31

34

35

RFD-D-160 SIRIUS 125

34

122

32

35

37

38

RFD-D-160 SIRIUS 125

48

171

34

37

39

40

RFD-D-200 SIRIUS 125

9

32

15

18

21

23

RFD-D-200 SIRIUS 125

27

97

23

27

30

32

RFD-D-200 SIRIUS 125

45

161

27

31

34

36

RFD-D-200 SIRIUS 125

63

226

30

33

36

38

RFD-D-200 SIRIUS 160

9

32

20

23

26

28

RFD-D-200 SIRIUS 160

34

121

28

31

34

36

RFD-D-200 SIRIUS 160

58

210

32

35

37

39

RFD-D-200 SIRIUS 160

83

299

34

37

40

41

RFD-D-250 SIRIUS 160

14

50

≤15

15

19

22

RFD-D-250 SIRIUS 160

37

134

19

24

28

31

RFD-D-250 SIRIUS 160

61

218

24

28

33

35

RFD-D-250 SIRIUS 160

84

303

27

31

36

38

RFD-D-250 SIRIUS 200

14

50

20

25

30

32

RFD-D-250 SIRIUS 200

47

170

27

32

37

40

RFD-D-250 SIRIUS 200

81

290

30

35

40

43

RFD-D-250 SIRIUS 200

114   

410

32

37

42

45

RFD-D-315 SIRIUS 200

25

90

23

29

35

39

RFD-D-315 SIRIUS 200

59

214

26

32

38

42

RFD-D-315 SIRIUS 200

94

339

27

34

40

44

RFD-D-315 SIRIUS 200

129   

463

28

35

41

45

RFD-D-315 SIRIUS 250

25

90

22

26

29

31

RFD-D-315 SIRIUS 250

68

245

28

31

35

37

RFD-D-315 SIRIUS 250

111   

401

30

34

37

39

RFD-D-315 SIRIUS 250

154   

556

32

36

39

41

RFD-D-400 SIRIUS 250

36

128

25

28

31

34

RFD-D-400 SIRIUS 250

81

291

29

32

34

38

RFD-D-400 SIRIUS 250

126   

454

31

34

37

40

RFD-D-400 SIRIUS 250

171   

617

32

36

38

41


RFD-SIRIUS is an air terminal device combined with a VAV terminal unit.

The ceiling diffuser with a square or circular diffuser face is preferably used as a supply air diffuser for comfort zones.

The fixed air control blades allow for horizontal swirling supply air discharge creating high induction levels.

The diffuser is suitable for installation into all types of suspended ceilings.

The diffuser is fixed with a central fixing screw to the cross bar (no tools required); the cross bar is inserted into the SIRIUS plenum box (no tools required) and held in place with magnets.

The SIRIUS plenum box is fitted with two spigots, one for connection to the ductwork and another one for connection of the diffuser face.

The SIRIUS plenum box contains two cylinders, one fitted inside the other; one of the cylinders is perforated.

The perforated cylinder is moved along a toothed bar upon control input from the volume flow controller, and the free area changes as a consequence.

A fleece covering the perforated cylinder acts as an equalising element.

This special construction feature allows for omitting any additional sound attenuator.

Special characteristics

  • RFD-SIRIUS combines the functions of a volume flow controller, sound attenuator, plenum box and air terminal device in one unit.
  • Low sound power level, ideal for comfort zones
  • For all types of ceiling systems, also suitable for freely suspended installation
  • Differential pressure measurement with integral measuring tubes

Materials and surfaces

  • Diffuser face and plenum box made of galvanised sheet steel
  • Measuring unit made of aluminium
  • Exposed parts of the diffuser face powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour
  • Noise insulating fleece on the controller cage

Attachments

Variable volume flow control with electronic Compact controller to switch an external control signal and an actual value signal for integration into the central BMS.

  • Supply voltage 24 V AC/DC
  • The signal interface depends on the selected control component variant
  • Variable air or constant air volume flow control
  • The flow rate is measured according to the dynamic measurement principle
  • Volume flow rate control range: approx. 10 – 100 % of the nominal volume flow rate


Deviation from the operating range:

  • 10 – 20% of the nominal volume flow rate: +/- 25%
  • 20 – 40% of the nominal volume flow rate: +/- 10%
  • 40 – 100% of the nominal volume flow rate: +/- 4%


Electrical connection with cable or plug, depending on the selected control component variant.

Technical data

  • RFD nominal sizes: 160, 200, 250, 315, 400 mm
  • SIRIUS nominal sizes: 125, 160, 200, 250 mm
  • Volume flow rate: 4.7 – 171.4 l/s or 17 – 617 m³/h
  • Supply air to room air temperature difference: –12 to +10 K

Sizing data

  • V _______________________ [m³/h]
  • Δpt _______________________ [Pa]

Air-regenerated noise

  • LWA _______________________ [dB(A)]
00244595_0

 Type
RFD-SIRIUS       Ceiling diffuser

 Construction style
R       Circular
Q       Square

 Construction
       No entry: without discharge nozzle
D       With discharge nozzle

 Connection
T       Cross bar with magnets and quick fixing kit

 Nominal size [mm]
∅ spigot for duct connection
125       For diffuser faces 160 and 200
160       For diffuser faces 200 and 250
200       For diffuser faces 250 and 315
250       For diffuser faces 315 and 400

∅ spigot for diffuser face connection (nominal size of diffuser face)
160
200
250
315
400

 

 Attachment (control component)
BC0       Volume flow controller with MP bus interface and analogue interface 0 – 10 V / 2 – 10 V
BL0       Volume flow controller with LonWorks FTT-10A interface
BM0       Volume flow controller with Modbus RTU interface
BM0-J6       Volume flow controller with Modbus RTU interface and RJ12 socket for connecting an X-AIRCONTROL zone module

 Signalling (can be selected only for BC0)
E0       0 – 10 V DC (variable volume flow rate)
F0       0 – 10 V DC (constant volume flow rate)
E2       2 – 10 V DC (variable volume flow rate)
F2       2 – 10 V DC (constant volume flow rate)

 Volume flow rate
Variable:       Vmin, Vmax
Constant:       Vconst

 Exposed surface of diffuser face
       No entry: powder-coated RAL 9010, pure white
P1       Powder-coated, specify RAL CLASSIC colour

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

Order example: RFD-SIRIUS-R-D-T/160-250/BC0/E0/60-180/P1-RAL 9016

Construction style

Circular

Construction

With discharge nozzle

Connection

Cross bar with magnets and quick fixing kit

∅ spigot for duct connection

160 mm

Nominal size of diffuser face

250 mm

Control component

Volume flow controller with MP bus interface and analogue interface 0 – 10 V / 2 – 10 V

Control input signal

0 – 10 V DC (variable volume flow rate)

Volume flow rate

60 – 180 m³/h

Exposed surface of diffuser face

Powder-coated RAL 9016, traffic white, gloss level 70%


Order example: RFD-SIRIUS-Q-T/160-250/BM0/100-160

Construction style

Square

Construction

Without discharge nozzle

Connection

Cross bar with magnets and quick fixing kit

∅ spigot for duct connection

160 mm

Nominal size of diffuser face

250 mm

Control component

Volume flow controller with Modbus RTU interface

Control input signal

Modbus RTU

Volume flow rate

100 – 160 m³/h

Exposed surface of diffuser face

Powder-coated RAL 9010, pure white, gloss level 25%


 

Variants, Dimensions and weight

  • Variants
  • Dimensions and weight

RFD-SIRIUS-Q

Nominal sizeØDA □Q₁ ØD2BL₁HH₂ AeffmSIRIUS weight RFD weight 
Nominal sizemmm2kg

RFD 160 SIRIUS 125

158

198

123

325

386

175

60

0.0037

9.2

8.5

0.7

RFD 200 SIRIUS 125

198

248

123

325

386

175

60

0.0066

9.0

8.0

1.0

RFD 200 SIRIUS 160

198

248

158

360

402

210

60

0.0066

10.5

9.5

1.0

RFD 250 SIRIUS 160

248

298

158

360

402

210

60

0.0110

10.5

9.0

1.5

RFD 250 SIRIUS 200

248

298

198

400

435

240

60

0.0110

12.5

11.0

1.5

RFD 315 SIRIUS 200

313

398

198

400

435

240

60

0.0205

12.9

10.5

2.4

RFD 315 SIRIUS 250

313

398

248

450

392

290

60

0.0205

14.9

12.5

2.4

RFD 400 SIRIUS 250

398

498

248

450

392

290

60

0.0280

15.6

12.0

3.6

□Q1 is available as an option for all ØDA units in sizes 593, 598, 618 and 623


RFD-SIRIUS-Q-D

Nominal sizeØDA □Q₁ ØD2BL₁HH2 AeffmSIRIUS weight RFD weight 
Nominal sizemmkg

RFD 160 SIRIUS 125

158

248

123

325

386

175

80

0.0060

9.4

8.5

0.9

RFD 200 SIRIUS 125

198

248

123

325

386

175

80

0.0092

9.2

8.0

1.2

RFD 200 SIRIUS 160

198

248

158

360

402

210

80

0.0092

10.7

9.5

1.2

RFD 250 SIRIUS 160

248

298

158

360

402

210

80

0.0150

10.7

9.0

1.7

RFD 250 SIRIUS 200

248

298

198

400

435

240

80

0.0150

12.7

11.0

1.7

RFD 315 SIRIUS 200

313

398

198

400

435

240

90

0.0265

13.4

10.5

2.9

RFD 315 SIRIUS 250

313

398

248

450

392

290

90

0.0265

15.4

12.5

2.9

RFD 400 SIRIUS 250

398

498

248

450

392

290

90

0.0355

16.3

12.0

4.3

□Q1 is available as an option for all ØDA units in sizes 593, 598, 618 and 623


RFD-SIRIUS-R

Nominal sizeØDA ØD₁ ØD2BL₁HH₂ AeffmSIRIUS weight RFD weight 
Nominal sizemmm2kg

RFD 160 SIRIUS 125

158

197

123

325

386

175

55

0.0037

9.1

8.5

0.6

RFD 200 SIRIUS 125

198

241

123

325

386

175

55

0.0066

8.9

8.0

0.9

RFD 200 SIRIUS 160

198

241

158

360

402

210

55

0.0066

10.4

9.5

0.9

RFD 250 SIRIUS 160

248

295

158

360

402

210

55

0.0110

10.3

9.0

1.3

RFD 250 SIRIUS 200

248

295

198

400

435

240

55

0.0110

12.3

11.0

1.3

RFD 315 SIRIUS 200

313

364

198

400

435

240

55

0.0205

12.4

10.5

1.9

RFD 315 SIRIUS 250

313

364

248

450

392

290

55

0.0205

14.4

12.5

1.9

RFD 400 SIRIUS 250

398

450

248

450

392

290

55

0.0280

14.9

12.0

2.9


RFD-SIRIUS-R-D

Nominal sizeØDA ØD1ØD2BL₁HH2 AeffmSIRIUS weight RFD weight 
Nominal sizemmkg

RFD 160 SIRIUS 125

158

250

123

325

386

175

80

0.0060

9.5

8.5

1.0

RFD 200 SIRIUS 125

198

300

123

325

386

175

80

0.0092

9.3

8.0

1.3

RFD 200 SIRIUS 160

198

300

158

360

402

210

80

0.0092

10.8

9.5

1.3

RFD 250 SIRIUS 160

248

350

158

360

402

210

80

0.0150

10.8

9.0

1.8

RFD 250 SIRIUS 200

248

350

198

400

435

240

80

0.0150

12.8

11.0

1.8

RFD 315 SIRIUS 200

313

450

198

400

435

240

80

0.0265

13.3

10.5

2.8

RFD 315 SIRIUS 250

313

450

248

450

392

290

80

0.0265

15.3

12.5

2.8

RFD 400 SIRIUS 250

398

580

248

450

392

290

80

0.0355

16.1

12.0

4.1


Installation examples, Installation details, Basic information and nomenclature

  • Installation examples
  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • Preferably for rooms with a clear height up to 4.0 m
  • Flush ceiling installation; variant RFD-*-D is suitable for suspended installation

Upstream conditions

The volume flow rate accuracy ΔV applies to a straight upstream section of the duct. Bends, junctions or a narrowing or widening of the duct cause turbulence that may affect measurement. Duct connections, e.g. branches off the main duct, must comply with EN 1505. Some installation situations require straight duct sections upstream.

Installation opening

Nominal sizeØDAØd
Nominal sizeWithout nozzleWith nozzle
Nominal sizemm

RFD 160

158

175

205

RFD 200

198

215

245

RFD 250

248

265

295

RFD 315

313

330

380

RFD 400

398

415

480


Principal dimensions

ØD [mm]

Outer diameter of the spigot

ØD₁ [mm]

Outer diameter of a circular diffuser face

ØD₂ [mm]

Diameter of a circular diffuser face style

ØD₃ [mm]

Diameter of a circular plenum box

□Q₁ [mm]

Outer diameter of a square diffuser face

□Q₂ [mm]

Dimensions of a square diffuser face style

□Q₃ [mm]

Dimensions of a square plenum box

H₁ [mm]

Distance (height) from the lower edge of the suspended ceiling to the lower edge of the diffuser face

H₂ [mm]

Height of a ceiling diffuser, from the lower edge of the suspended ceiling to the upper edge of the spigot

H₃ [mm]

Height of a ceiling diffuser with plenum box, from the lower edge of the suspended ceiling to the upper edge of the plenum box or of the spigot

A [mm]

Position of the spigot, defined by the distance of the spigot centre line to the lower edge of the suspended ceiling

C [mm]

Length of the spigot

m [kg]

Weight

Nomenclature

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

Δtz [K]

Supply air to room air temperature difference, i.e. supply air temperature minus room temperature

Δpt [Pa]

Total differential pressure

Aeff [m²]

Effective air discharge area


All sound power levels are based on 1 pW.

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