RFD-SIRIUS

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]	Δpt [Pa]
			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]	Δpt [Pa]
			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

–

R

–

D

–

T

/

160 - 250

/

BC0

/

E0

/

40 - 200

/

P1 - RAL 9010

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1

2

3

4

5

6

7

8

9

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