Potterton Sirus three FS

Gas Boilers

Potterton Sirus three FS

The Potterton Sirius Three FS range of floor-standing condensing gas boilers offers outstanding efficiency, flexibility, and reliability for a wide variety of applications.

With outputs from 50 kW to 250 kW, these compact and robust boilers are suitable for large domestic properties, small commercial buildings, and medium to large-scale projects.

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Features and Benefits
Product Literature
Dimensions
Technical Specification

Features and Benefits

High Efficiency

A gross seasonal efficiency of up to 97.5% reduces energy consumption.

Longevity

Wide 9:1 modulation ratio reducing constant on/off cycling to improve efficiency and boiler longevity

Advanced controls

Supplied with Siemens controls with state-of-the-art PCB, offering improved control options.

Lightweight design

Stainless steel heat exchanger provides reliable performance and energy-efficient heat transfer.

Compact design

Built-in casters (on larger models) make the Sirius Three FS easy to manoeuvre, pass through 700 mm doorways, and install even where space is limited.

Cascade

An integrated Cascade function allows up to 16 boilers to be managed by the Siemens controller.

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Dimensions

Sirius three FS		50	70	90	110	130	150	200	250
A	Width	600	600	600	600	600	600	600	600
B	Height	848	848	1127	1127	1128	1128	1166	1166
C	Depth	681	681	681	681	681	681	1412	1412
Clearances
1	Front	1000	1000	1000	1000	1000	1000	1000	1000
2	L Hand	500	500	500	500	500	500	500	500
3	Top	250	250	250	250	400	400	400	400
4	Back	320	320	500	500	500	500	500	500
5	R Hand	500	500	500	500	500	500	500	500

*Back clearance increases to 800 when installed with a low-loss header kit, plate heat exchange kit, or cascade kit

Technical Specification

Model			50	70	90	110	130	150	200	250
Performance	Fuel Type
Output @ 80 / 60oC	NG	kW	45.1	65.1	85.1	102	121	140	184	238
Output @ 50 / 30oC	NG	kW	48.6	70.3	92.2	110.2	130	150	200	250
Input (Gross) Maximum	NG	kW	51.4	74.3	97	116.4	137.4	158.6	212	266.4
Output @ 80 / 60oC	LPG	kW	45.1	65.1	85.1	102	121	140	184	238
Output @ 50 / 30oC	LPG	kW	48.6	70.3	92.2	110.2	130	150	200	250
Input (LPG) Maximum	LPG	kW	51.4	74.3	97.5	116.4	137.4	158.6	212	266.4
Efficiency	Value (%)
Efficiency @ 80/60oC 100% Load	% Gross		87.8	87.6	87.7	87.6	88.4	88.4	87.7	87.4
Efficiency @ 30% Load	% Gross		97.1	96.8	96.9	96.8	97.8	97.8	98.3	98.3
Current Building Reg Part L2 Seasonal Efficiency	% Gross		97.1	96.9	97.0	96.9	97.3	97.3	97.5	97.5
ErP efficiency rating			A	A	N/A	N/A	N/A	N/A	N/A	N/A
Gas
Gas Consumption	NG	m3/h	4.9	7.07	9.25	11.1	13.1	15.1	20.2	25.4
Gas Consumption	LPG	Kg/h	3.59	5.19	6.79	8.15	9.8	11.3	14.8	18.6
Inlet Gas Pressure	NG-G20	m/bar	20				17-25
Inlet Gas Pressure	LPG-G31	m/bar	37				27-45
Gas Connection Size		inch	0.75	0.75	1	1	1	1	1.5	1.5
Gas Connection Type			Male Thread
Flue
Flue Gas Volume @ 80/60oC (NG)	m3/h@STP		67.6	97.7	127.6	147.2	181	208	331	422
Flue Gas Volume @ 50/30oC (NG)	m3/h@STP		62.8	90.5	117.7	136.2	166	191	303	386
Flue Gas Volume @ 80/60oC (LPG)	m3/h@STP		61.5	88.9	114.1	139.3	207	240	320	400
Flue Gas Volume @ 50/30oC (LPG)	m3/h@STP		57.1	82.4	105.2	128.9	190	219	292	367
Max Flue Gas Pressure @ Outlet (B23)	pa		200				170	280	230	280
Hydraulic
Water Flow Rate @ 15oC ΔT	l/s		0.72	1.04	1.36	1.63	2.08	2.71	3.19	3.99
Water Flow Rate @ 20oC ΔT	l/s		0.54	0.78	1.02	1.22	1.56	1.80	2.39	2.99
Hydraulic Resistance @ 15oC ΔT	kPa		94	52	40	40	69	70	67	65
Hydraulic Resistance @ 20oC ΔT	kPa		54	32	22	22	41	41	41	41
Water Content	Litres		3	5	9	10	10	11	13	15
Flow & Return Connection Size	inch		1	1	1.5	1.5	1.5	1.5	2	2
Flow & Return Connection Type			Male Thread
Flue Connection Size	mm		80/125	80/125	110/160 (100/150)	110/160 (100/150)	110/160 (100/150)	110/160 (100/150)	150	150
Max Boiler Operating Pressure	bar		4				6
Min Boiler Operating Pressure	bar		1				1
Maximum Flow Temperature	oC		85
General
Appliance Dry Weight	Kg		60	70	104	109	126	132	212	232
Dimension W x D x H	mm		600 x681 x848	600 x681 x848	600 x681 x1127	600 x681 x1127	600 x681 x1128	600 x681 x1128	600 x1412 x1166	600 x1412 x1166
NOx Level (Dry @ 0% O2)	mg/kWh		27	31	36	22	17	23	37	39
CO2 Content - Natural Gas	%		8.5 - 9	8.5 - 9	8.5 - 9	9 - 9.2	9.2 - 9.4	9.2 - 9.4	9.2 - 9.4	8.8 - 9
CO2 Content - LPG	%		9.5 - 10	9.5 - 10	9.9 - 10	9.5 - 10	10 - 10.2	10 - 10.2	10.2 - 10.4	10.2 - 10.4
High Level Ventilation* (BS 6644)	cm2		93	134	175	210	275	317	424	534
Low Level Ventilation* (BS 6644)	cm2		185	268	350	418	550	634	848	1068
Electrical
Power consumption (with pump)	W		100	117	146	185	187	283	242	369
Nominal supply voltage	V / Hz		230 v 1 Ph 50 Hz

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Potterton Sirus three FS

The Potterton Sirius Three FS range of floor-standing condensing gas boilers offers outstanding efficiency, flexibility, and reliability for a wide variety of applications.

Features and Benefits

High Efficiency

Longevity

Advanced controls

Lightweight design

Compact design

Cascade

Product Literature

Installation and Service Manuals

Installation and Service Manuals

Potterton Sirus three FS

User Guides

User Guides

Potterton Sirus three FS

Specification Guides

Specification Guides

Potterton Sirus three FS

Energy Labels

Energy Labels

Potterton Sirus three FS

Product Fiche

Product Fiche

Product Documentation

CAD

CAD

Potterton Sirus three FS

BIM

BIM

Potterton Sirus three FS

Dimensions

Technical Specification

Contact your TSM

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