RFD-Sirius

RFD-SIRIUS

RFD-Sirius, cross bar

Horizontal swirling air discharge

Circular diffuser face

RFD-SIRIUS, integral measuring tubes

RFD-SIRIUS, volume flow controller

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

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

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 RFD	160, 200, 250, 315, 400 mm
Nominal sizes SIRIUS	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 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

Combination	qv [l/s]	qv [m³/h]	Δp_t [Pa]
Combination	qv [l/s]	qv [m³/h]	50	100	200	300
RFD-160 SIRIUS 125	5	17	≤15	≤15	≤15	15
	14	52	25	27	29	30
	24	87	32	34	36	37
	34	123	36	38	40	42
RFD-200 SIRIUS 125	7	25	15	17	20	22
	22	80	25	28	31	33
	37	134	30	33	36	38
	53	189	33	36	39	41
RFD-200 SIRIUS 160	7	25	≤15	15	18	20
	25	90	25	29	32	33
	43	155	31	34	37	39
	61	219	–	38	41	43
RFD-250 SIRIUS 160	10	37	≤15	15	18	20
	34	121	23	26	29	31
	57	204	27	31	34	35
	80	288	31	34	37	39
RFD-250 SIRIUS 200	10	37	20	24	28	30
	39	141	28	32	36	38
	68	245	31	35	39	41
	97	349	–	37	41	43
RFD-315 SIRIUS 200	19	68	27	31	36	39
	50	180	29	34	39	42
	81	292	31	35	40	43
	112	404	32	36	41	44
RFD-315 SIRIUS 250	19	68	18	22	26	28
	52	187	26	30	34	36
	85	305	30	34	38	40
	118	424	32	36	40	42
RFD-400 SIRIUS 250	27	96	24	29	33	36
	73	263	29	33	38	40
	119	429	31	35	40	42
	166	596	32	36	41	44

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

Combination	qv [l/s]	qv [m³/h]	Δp_t [Pa]
Combination	qv [l/s]	qv [m³/h]	50	100	200	300
RFD-D-160 SIRIUS 125	6	23	22	24	27	28
	20	72	29	31	34	35
	34	122	32	35	37	38
	48	171	34	37	39	40
RFD-D-200 SIRIUS 125	9	32	15	18	21	23
	27	97	23	27	30	32
	45	161	27	31	34	36
	63	226	30	33	36	38
RFD-D-200 SIRIUS 160	9	32	20	23	26	28
	34	121	28	31	34	36
	58	210	32	35	37	39
	83	299	34	37	40	41
RFD-D-250 SIRIUS 160	14	50	≤15	15	19	22
	37	134	19	24	28	31
	61	218	24	28	33	35
	84	303	27	31	36	38
RFD-D-250 SIRIUS 200	14	50	20	25	30	32
	47	170	27	32	37	40
	81	290	30	35	40	43
	114	410	32	37	42	45
RFD-D-315 SIRIUS 200	25	90	23	29	35	39
	59	214	26	32	38	42
	94	339	27	34	40	44
	129	463	28	35	41	45
RFD-D-315 SIRIUS 250	25	90	22	26	29	31
	68	245	28	31	35	37
	111	401	30	34	37	39
	154	556	32	36	39	41
RFD-D-400 SIRIUS 250	36	128	25	28	31	34
	81	291	29	32	34	38
	126	454	31	34	37	40
	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 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]
Δp_t [Pa]

air-regenerated noise

L_WA [dB(A)]

RFD-SIRIUS

–

160 - 250

BC0

40 - 200

P1 - RAL 9010

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
qᵥ_min– qᵥ_max specify

Constant
qᵥ_const.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

Type	RFD-SIRIUS
Construction style	circular
Construction	with discharge nozzle
Connection	Cross 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 signal	0 – 10 V DC (variable volume flow rate)
Volume flow rate [m³/h]	40 – 200
Diffuser face finish	powder-coated, RAL 9010 (pure white)

Variants

RFD-Q-D

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

Installation in continuous ceilings

RFD-SIRIUS_Abzweig_von_einer_Hauptleitung_gc_DE_deai.png

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	ØD_A [mm]	Ød [mm]
NS	ØD_A [mm]	without nozzle	with nozzle
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

Downloads

product information

Product data sheet RFD-Sirius

RFD-SIRIUS_PD_2024_06_05_DE_en Product data sheet 16 MB pdf

brochures

Sales flyer

SF_2017_09_RFD-SIRIUS_DE_en Sales flyer Type RFD-SIRIUS 950 KB pdf

certificates

Declaration of hygiene conformity Type RFD-SIRIUS

RFD-Sirius_HC_2024_05_DE_en Hygiene certificate 1,5 MB pdf

operation manuals

Installation manual Air terminal devices

IM_2018_06_A00000054447 Installation manual 1,2 MB pdf

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RFD-SIRIUS

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

General information

Technical information

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

Variants

Product details

Product details

Downloads

product information

Product data sheet RFD-Sirius

brochures

Sales flyer

certificates

Declaration of hygiene conformity Type RFD-SIRIUS

operation manuals

Installation manual Air terminal devices

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

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