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TROX RFD-SIRIUS ceiling swirl diffuser with integrated VAV controller and sound attenuation
TROX RFD-SIRIUS plenum box interior with cross bar and circular duct connection
TROX RFD-SIRIUS circular ceiling swirl diffuser face with radial air control blades
TROX RFD-SIRIUS ceiling swirl diffuser showing horizontal swirling supply air distribution
TROX RFD-SIRIUS integrated volume flow controller and noise insulation inside plenum box
TROX RFD-SIRIUS ceiling swirl diffuser with compact VAV plenum box and circular diffuser face

TROX RFD-Sirius – Ceiling Swirl Diffusers

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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: 6, 8, 10, 12 and 16
  • Nominal sizes SIRIUS: 5, 6, 8 and 10
  • Volume flow rate range: 9.96 to 362.98 cfm
  • 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

 

SKU: RFD-Sirius Category: Tag:

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: 6, 8, 10, 12 and 16
  • SIRIUS: 5, 6, 8 and 10

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: 6, 8, 10, 12, 16 in
  • SIRIUS nominal sizes: 5, 6, 8, 10 in
  • Volume flow rate: 9.96 – 362.98 cfm
  • 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

Function

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.

 

Schematic Illustration of RFD-SIRIUS

1 Diffuser face type RFD

2 SIRIUS plenum box

3 Lip seal

4 Spigot

5 Controller cage

6 Control component

7 Electrical connecting cable

Specification Text

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: 6, 8, 10, 12, 16 in
  • SIRIUS nominal sizes: 5, 6, 8, 10 in
  • Volume flow rate: 9.96 – 362.98 cfm
  • Supply air to room air temperature difference: -12 to +10 K

Downloads

RFD-Sirius Product Data Sheet

RFD-Sirius Sales Flyer