RFD-SIRIUS_img_04psd.png
RFD-SIRIUS

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RFD-Sirius, cross bar

RFD-Sirius, cross bar

RFD-Sirius, cross bar

RFD_gc_22psd.png
Horizontal swirling air discharge

Horizontal swirling air discharge

Horizontal swirling air discharge

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Circular diffuser face

Circular diffuser face

Circular diffuser face

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RFD-SIRIUS, integral measuring tubes

RFD-SIRIUS, integral measuring tubes

RFD-SIRIUS, integral measuring tubes

RFD-SIRIUS_img_07psd.png
RFD-SIRIUS, volume flow controller

RFD-SIRIUS, volume flow controller

RFD-SIRIUS, volume flow controller

RFD-SIRIUS_img_04psd.png
RFD-SIRIUS_img_10psd.png
RFD_gc_22psd.png
RFD_img_11psd.png
RFD-SIRIUS_img_05psd.png
RFD-SIRIUS_img_07psd.png

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.

  • Nominal sizes RFD: 160, 200, 250, 315 and 400
  • Nominal sizes SIRIUS: 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

General information

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


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.


Material 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


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


Maintenance

  • Low maintenance as construction and materials are not subject to wear and tear
  • Inspection and cleaning according to VDI 6022

Technical 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. To determine the current actual volume flow rate, the differential pressure is measured using the integrated measuring tubes and transmitted to the controller. Depending on the desired setpoint value, the volume flow control unit is adjusted with an integrated linear actuator. The construction of the diffuser ensures that sound is effectively absorbed, which results in low sound power levels.

Nominal sizes RFD160, 200, 250, 315, 400 mm
Nominal sizes SIRIUS125, 160, 200, 250 mm
Volume flow rate4.7 – 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 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

Combinationqv [l/s]qv [m³/h]

Δpt [Pa]

50100200300
RFD-160 SIRIUS 125517≤15≤15≤1515
145225272930
248732343637
3412336384042
RFD-200 SIRIUS 12572515172022
228025283133
3713430333638
5318933363941
RFD-200 SIRIUS 160725≤15151820
259025293233
4315531343739
61219384143
RFD-250 SIRIUS 1601037≤15151820
3412123262931
5720427313435
8028831343739
RFD-250 SIRIUS 200103720242830
3914128323638
6824531353941
97349374143
RFD-315 SIRIUS 200196827313639
5018029343942
8129231354043
11240432364144
RFD-315 SIRIUS 250196818222628
5218726303436
8530530343840
11842432364042
RFD-400 SIRIUS 250279624293336
7326329333840
11942931354042
16659632364144

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

Combinationqv [l/s]qv [m³/h]

Δpt [Pa]

50100200300
RFD-D-160 SIRIUS 12562322242728
207229313435
3412232353738
4817134373940
RFD-D-200 SIRIUS 12593215182123
279723273032
4516127313436
6322630333638
RFD-D-200 SIRIUS 16093220232628
3412128313436
5821032353739
8329934374041
RFD-D-250 SIRIUS 1601450≤15151922
3713419242831
6121824283335
8430327313638
RFD-D-250 SIRIUS 200145020253032
4717027323740
8129030354043
11441032374245
RFD-D-315 SIRIUS 200259023293539
5921426323842
9433927344044
12946328354145
RFD-D-315 SIRIUS 250259022262931
6824528313537
11140130343739
15455632363941
RFD-D-400 SIRIUS 2503612825283134
8129129323438
12645431343740
17161732363841

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 features

  • 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 volumee flow control with electronic compact controller for the connection of a reference variable and feedback of an actual value signal for integration into the MCE/BACS.

  • Supply voltage 24 V AC/DC
  • The signal interface depends on the selected control component variant
  • Variable or constant air volume flow control
  • The volume 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

  • qᵥ [m³ /h]
  • Δpt [Pa]

air-regenerated noise

  • LWA [dB(A)]


RFD-SIRIUSRDT/160 - 250/BC0/E0/40 - 200/P1 - RAL 9010
|||||||||
123456789
1 Type
RFD-SIRIUS
Swirl diffuser

2 Construction style
R
circular
Q square

3 Construction
No entry: without discharge nozzle
D with discharge nozzle

4 Connection
T
Cross bar with magnet fastening and quick fixing kit

5 Nominal size [mm]
∅ spigot for SIRIUS plenum box
125 (for diffuser face 160 and 200)
160 (for diffuser face 200 and 250)
200 (for diffuser face 250 and 315)
250 (for diffuser face 315 and 400)

∅ spigot or nominal size of diffuser face
160, 200, 250, 315, 400

6 Attachment (control component)
BC0
Volume flow controller with MP bus interface and analogue interface 0 – 10 V / 2 – 10 VBL0 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

7 Control input signal
Only with attachment 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)

8 Volume flow [m³/h]
Variable
qᵥmin – qᵥmax specify

Constant
qᵥconst. specify

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

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


Order example: RFD-SIRIUS-R-D-T/160-250/BC0/E0/40-200/P1-RAL9010

TypeRFD-SIRIUS
Construction stylecircular
Constructionwith discharge nozzle
ConnectionCross bar with magnet fastening and quick fixing kit
Nominal size [mm]∅ Connection spigot SIRIUS box 160, nominal size diffuser face 250
Attachment (control component)Volume flow controller with MP-Bus interface and analogue interface
Control input signal0 – 10 V DC (variable volume flow rate)
Volume flow rate [m3/h]40 – 200
Diffuser face finishpowder-coated, RAL 9010 (pure white)

Variants

  • VARIANTS

Application

  • Für Zuluft in Komfortbereichen, wenn der Zuluftvolumenstrom geregelt werden soll
  • Variante mit Ausströmdüse bietet die Möglichkeit den Luftdurchlass freihängend zu montieren
  • Effizienter Drall mit hoher Induktion bewirkt schnellen Abbau der Temperaturdifferenz und der Luftgeschwindigkeit
  • Volumenstromregelung im geschlossenen Regelkreis mit Hilfsenergie
  • Differenzdruckmessung mit Hilfe integrierter Messrohre

Product details

  • PRODUCT DETAILS

Product details

Installation and commissioning

  • Preferably for clear room heights 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

NS

ØDA [mm]

Ød [mm]

without nozzlewith nozzle
RFD 160158175205
RFD 200198215245
RFD 250248265295
RFD 315313330380
RFD 400398415480

Downloads

product information

certificates

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