Sirius FS 400kw and 525kW

Specification
Output	Dry weight	Dimensions (WxHxD)	Flue connection size	ErP
400kW	359kg	692x1341x1405mm	180	N/A
525kW	424kg	692x1558x1405mm	180	N/A

Stainless steel heat exchanger designed for maximum combustion performance and safety
Very compact design so it's easy to fit in confined spaces
Built in load sharing, spreading heat demand across two burners, reducing wear and tear on components
0 - 10 V connections as standard for easy BMS interface
Free commissioning by Potterton Commercial engineers, ensuring optimum performance, efficiency and savings
Service plans are available for on-going support, whenever you need it
The controls can be programmed to work with solar thermal, biomass and buffer tanks
Five year parts and labour warranty*

* Terms and conditions apply. Click here for details.

Specification
Model			400	525
Performance	Fuel
Output @ 80 / 60^oC	NG	kW	368.6	485.5
Output @ 50 / 30^oC	NG	kW	401	527
Input (Gross) Maximum	NG	kW	421.7	554.9
Efficiency
Efficiency @ 50 / 30^oC - 100% Load		% Gross	95	95.1
Efficiency @ 50 / 30^oC - 30% Load		% Gross	97.8	97.4
Current Building reg. Part L2 Seasonal Efficiency		% Gross	97	97.3
Gas
Gas Consumption (NG)		m³/h	3.5 - 40.0	4.5 - 52.4
Inlet Gas Pressure (Natural Gas - G20)		m/bar	18-20	18-20
Gas Connection Size		inch	2"
Gas Connection Type		BSP	Male Threaded
Flue
Flue Gas Volume @ 80/60^oC (NG)		m³/h @ STP	673	875
Max Flue Gas Pressure @ Outlet		m/bar	200	250
Hydraulic
Water Flow Rate @ 15^oC T		l/s	6.4	8.4
Water Flow Rate @ 20^oC		l/s	4.8	6.3
Hydraulic Resistance @ 15^oC T		kPa	73	66
Hydraulic Resistance @ 20^oC T		kPa	42	38
Water Content		Litres	30	43
Flow & Return Connection Type		Flanged	DN65 PN6	DN80 PN6
Flue Connection Size		mm	180	180
Max Boiler Operating Pressure		bar	6	6
Min Boiler Operating Pressure		bar	1	1
Maximum Flow Temperature		^oC	90	90
General
Appliance Dry Weight		Kg	359	424
Dimensions (W x D x H)		mm	692 x 1341 x 1405	692 x 1557 x 1405
NOx Level (Dry @ 0% O2)		mg/kWh	26 (45)	26 (45)
CO2 Content - Natural Gas		%	9.0 (8.7)	9
Noise levels @ 1 m from unit		dB(A)	59	65
High Level Ventilation (BS 6644)		cm²	760	1000
Low Level Ventilation (BS 6644)		cm²	1520	2000
Electrical
Power Consumption		W	253	322
Nominal supply voltage		V/Hz	230/50

View product specification

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Dimensions

Sirius FS		400	525
A	Width	692	692
B	Height	1405	1405
C	Depth	1341	1558

Clearances

Sirius FS		400	525
1	Front	800	800
2	L Hand	400	400
3	Top	600	600
4	Back	600	600
5	R Hand	600	600

Learn more about the Sirius WH by downloading our product literature.

Sirius FS 400kW - 525kW - All Product files (16.05MB, 12/07/2017)
Stainless Steel Boilers Range Guide (5.64MB, 12/07/2017)
Sirius FS 400kW Technical Specification (0.32MB, 24/03/2016)
Sirius FS 525kW Technical Specification (0.33MB, 24/03/2016)
Sirius FS 400-525 Installation Guide (11.92MB, 15/07/2016)

Download CAD files for this product using the links below. To access CAD files you will need the correct software installed to allow you to open .dwg files such as AutoCAD