• 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.

View product specification

When clicked this will open the product specification in PDF format.

Specification

Model  400  525 
Performance Fuel
Output @ 80 / 60oC NG kW 380 475
Output @ 50 / 30oC NG kW 401 527
Input (Gross) Maximum NG kW 421.7 554.9
Efficiency
Efficiency @ 80 / 60oC - 100% Load % Gross 96.2 96.4
Efficiency @ 50 / 30oC - 30% Load % Gross 105.5 105.4
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 @ 80/60oC (NG) m3/h @ STP 673 875
Max Flue Gas Pressure @ Outlet m/bar 200 250
Hydraulic
Water Flow Rate @ 15oC T l/s 6.4 8.4
Water Flow Rate @ 20oC l/s 4.8 6.3
Hydraulic Resistance @ 15oC T kPa 73 66
Hydraulic Resistance @ 20oC 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 590 x 1341 x 1405 590 x 1558 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

 

Sirius FS 400kW and 525kW DimensionsDimensions and clearance measurements for all models of the Sirius FS 400kW and 525kW are featured in the tables below.

If you can't find the information you are looking for, you may find it within the product literature.

If you would like to speak to your local Area Sales Manager, please complete the online form within the enquiry tab.

 

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 FS by downloading our product literature.

  • 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

    Interested in this product for your premises? Complete the form below and someone from the team will contact you shortly.

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