Floor-standing, oil, gas and dual fuel, pressure jet and cast iron sectional commercial boilers.
The P Series is our range of three-pass cast iron sectional boilers. Perfect for use with gas, light oil, dual fuel, and biofuel through a pressure jet burner for commercial and industrial applications.
Designed on the basis of the triple-pass principle to achieve maximum efficiency, while the generously sized chamber allows optimal combustion and minimum NOx and CO2 emissions.
Compact yet extremely powerful, the P Series is available in two ranges: P420 and P520 (the P320 is suitable for replacement projects only)
If you need support choosing the best Pressure Jet solution for your project, just contact our team of dedicated experts who will talk you through the range. High combustion efficiency for higher than average energy savings.
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| Specification guide | P-Series Specification Guide | ||
| User Manuals | P420 Installation Service Manual | ||
| P520 Assembly Instructions | |||
| P520 Installation Service Manual | |||
| Technical Sheets | P420 10 Technical Sheet | ||
| P420 11 Technical Sheet | |||
| P420 12 Technical Sheet | |||
| P420 13 Technical Sheet | |||
| P420 14 Technical Sheet | |||
| P420 9 Technical Sheet | |||
| P520 13 Technical Sheet | |||
| P520 15 Technical Sheet | |||
| P520 17 Technical Sheet | |||
| P520 19 Technical Sheet | |||
| P520 21 Technical Sheet | |||
| P520 23 Technical Sheet | |||
| P520 25 Technical Sheet | |||
| P520 Technical Information | |||
| P320 4 Technical Specifications | Discontinued | ||
| P320 5 Technical Specifications | Discontinued | ||
| P320 6 Technical Specifications | Discontinued | ||
| P320 7 Technical Specifications | Discontinued | ||
| P320 8 Technical Specifications | Discontinued | ||
| P320 9 Technical Specifications | Discontinued | ||
| P420 8 Technical Specifications | Discontinued | ||
| Pressure Jet GP Series | Discontinued | ||
| Pressure Jet OG Series | Discontinued | ||
| P-Series Pressure Jet | Discontinued | ||
| P-Series Pressure Jet OD | Discontinued |
Click to download the technical specification for the P Series in PDF format
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9-Section |
10-Section |
11-Section |
12-Section |
13-Section |
14-Section |
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|---|---|---|---|---|---|---|
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Performance |
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Nominal heat output central heating operation @ 80/60°C kW (min-max)* |
450 |
540 | 600 | 670 | 720 | 780 |
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Efficiency |
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Efficiency – full load 100% NCV |
88% |
88% |
88% |
88% |
88% |
88% |
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Seasonal efficiency GCV |
82.2% |
82.2% |
82.2% |
82.2% |
82.2% |
82.2% |
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Burner type / Pressure jet |
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Standard fuel |
Natural gas/oil (35 sec)/dual fuel |
Natural gas/oil (35 sec)/dual fuel |
Natural gas/oil (35 sec)/dual fuel |
Natural gas/oil (35 sec)/dual fuel |
Natural gas/oil (35 sec)/dual fuel |
Natural gas/oil (35 sec)/dual fuel |
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Max gas consumption |
Check burner details |
Check burner details |
Check burner details |
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Oil consumption kg/hr @ 12 bar pump pressure |
43.33 |
52 | 57.77 | 64.52 | 63 | 75.11 |
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Min op gas pressure mbar |
Check burner details |
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Flue (conventional connection) |
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Flue diameter mm I/D |
250 |
250 | 300 | 300 | 300 | 300 |
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Chamber resistance mbar |
+1.5 | +2.0 | +2.5 | +2.5 | +2.5 | +3.5 |
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Flue gas flow rate kg/h gas |
810 | 972 | 1080 | 1207 | 1297 | 1450 |
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Min/max flue gas flow rate g/s |
4.1-15.1 |
4.1-20.7 |
5.9-30.1 |
6.5-39.5 |
8.0-52.8 |
76.9 max |
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Average flue gas temperature boiler temperature 80°C |
less than 220 |
less than 220 | less than 220 | less than 220 | less than 220 | less than 220 |
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Flue gas flow rate kg/h oil (full output 80/60°C) |
750 |
900 | 1000 | 1116 | 1200 | 1405 |
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Hydraulics |
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Water content litres |
409 |
452 |
495 |
538 |
581 |
624 |
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Resistance @ 11°C ΔT mbar |
39.7 |
66 |
82.6 |
109.2 |
132.17 |
162.23 |
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Hydraulic resistance @ 20°C ΔT mbar |
12 |
20 |
25 |
33 |
40 |
49 |
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Nominal flow rate @11°C ΔT l/s |
9.77 |
11.73 |
13.03 |
14.55 |
15.64 |
16.94 |
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Nominal flow rate @ 20°C ΔT l/s |
5.38 |
6.45 |
7.17 |
8.0 |
8.6 |
9.32 |
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Min. flow rate l/s based on a ΔT of 45°C |
2.39 |
2.85 |
3.18 |
3.54 |
3.8 |
4.12 |
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Connection size BSP |
2.5" Flanged |
2.5" Flanged |
3" Flanged |
3" Flanged |
3" Flanged | 3" Flanged |
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Standard operating temperature °C ** |
80 |
80 |
80 |
80 |
80 |
80 |
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Max operating temperature °C |
90 |
90 |
90 |
90 |
90 |
90 |
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Max water temperature °C |
110 |
110 |
110 |
110 |
110 |
110 |
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Max water operating pressure bar |
6 |
6 |
6 |
6 |
6 |
6 |
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Test press bar |
As per assembly manual |
As per assembly manual |
As per assembly manual |
As per assembly manual |
As per assembly manual |
As per assembly manual |
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Minimum return temperature °C |
50 |
50 |
50 |
50 |
50 |
50 |
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High limit set point °C |
110 |
110 |
110 |
110 |
110 |
110 |
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General |
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Shipping weight (kg) |
1650 |
1830 |
2010 |
2190 |
2370 |
2550 |
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Dimension (WxHxD inc. flow, return and gas pipework mm) |
1000 x 1690 x 1950 |
1000 x 1690 x 2120 |
1000 x 1690 x 2305 |
1000 x 1690 x 2465 |
1000 x 1690 x 2625 |
1000 x 1690 x 2785 |
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Noise levels dB(A) at 1 metre |
check burner details |
check burner details |
check burner details |
check burner details |
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Minimum operating gas pressure |
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check burner details |
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Radiated losses (w) based on ΔT 45°C |
358 |
413 |
451 |
494 |
505 |
555 |
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Combustion chamber diameter |
530 |
530 |
530 |
530 |
530 |
530 |
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Electrical |
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Nominal power supply |
230v x1ph x 50hz |
230v x1ph x 50hz |
230v x1ph x 50hz |
230v x1ph x 50hz |
230v x1ph x 50hz |
230v x1ph x 50hz |
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Fuse rating (amps) |
10 |
10 |
10 |
10 |
10 |
10 |
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*Gas consumption based on lower heating value under standard heating conditions: T=288.15K, p=1013.25mbar. Gag 30.33, G25 29.25, G31 88.00 MJ/m3 **Open vented option maximum operating temperature 75°C Note: 1 ph burners obtain their power supply via the boiler. Fuse rating amps: 10.4 mp 3ph burners require a 3ph supply + 1ph to the boiler |
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