British Gas British Gas 430/i system (430/i NG, LPG)
System boiler, natural gas and LPG
Combustion figures
| Figure | Natural gas (G20) | LPG (G31) |
|---|---|---|
CO₂ at high rate More infoHide infoMeasure 10 minutes after firing, with the boiler at maximum in central heating boost mode. The technical data table gives 9.6% (NG) and 11.5% (LPG) with no tolerance. | 9.6% ± 0.2 | 11.5% ± 0.2 |
CO₂ at low rate More infoHide infoThe technical data table gives 9.0% (NG) and 10.5% (LPG) with no tolerance. | 9.0% ± 0.2 | 10.5% ± 0.2 |
Maximum CO More infoHide infoChecked at maximum while setting the CO₂. | Less than 200 ppm | Less than 200 ppm |
CO/CO₂ ratio | Not given in MI | Not given in MI |
O₂ | Not given in MI | Not given in MI |
Working inlet pressure More infoHide infoMeasured with the boiler running at maximum. The commissioning page prints LPG as 37 mbar without the word minimum; the gas/air ratio page says a minimum of 37 mbar. |
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Gas rate at maximum More infoHide infoMaximum, 10 minutes from lighting. Measure at the gas meter. | 3.2 m³/h | 2.4 kg/h |
From 6 720 614 560 (2013/06)
Enter service mode for high and low rate
High rate
Steps not added yet. Follow the MI.
Low rate
Steps not added yet. Follow the MI.
Ending the test: follow the MI.
Models and GC numbers
| Model | GC number | Gas |
|---|---|---|
| 430/i | 41-311-80 | NG |
| 430/i LPG | 41-311-81 | LPG |
Source: British Gas 430/i wall hung RSF gas-fired condensing system boiler: instruction manual, installation, commissioning & servicing, 6 720 614 560 (2013/06).
Sections: Technical data (p. 6); Commissioning: checking gas inlet pressure, setting the boiler to maximum (p. 33); Setting the gas/air ratio, 5 Setting the CO₂ (p. 49).
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Check these figures against the MI for the appliance in front of you, matched by GC number and manual date. Combustion work needs a calibrated analyser and a Gas Safe registered engineer.