Glow-worm Glow-worm Energy system (12s, 15s, 18s, 25s, 30s)
System boiler, natural gas
Combustion figures
| Figure | Natural gas (G20) |
|---|---|
CO₂ at high rate More infoHide infoFull load: check programme P.01 set to 100, read once stable (about 5 minutes), at the flue gas analysis point. The check value (MI 7.10.5 and 10.4) applies front casing on or off. The setting value (MI 10.5, Setting the CO₂ value table) is for adjusting the CO₂; the text says it is the value with the front casing removed, though the table heading says front casing on / front casing off. |
|
CO₂ at low rate | Not given in MI |
Maximum CO More infoHide infoThe MI gives two limits. MI 10.5 table: CO at full load ≤ 250 ppm. The Benchmark CO and combustion ratio flowchart in Appendix I: CO less than 350 ppm at maximum and minimum rate (one box on the chart says 335 ppm after rectifying seals). |
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CO/CO₂ ratio More infoHide infoThe MI gives two limits. MI 10.5 table: CO/CO₂ ≤ 0.0027. The Benchmark flowchart in Appendix I: ratio less than 0.004 at maximum and minimum rate. |
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O₂ at high rate More infoHide infoMI 10.5 table: O₂ at full load 4.5 ±1.8 vol. %. | 4.5% ± 1.8 |
O₂ at low rate | Not given in MI |
Working inlet pressure More infoHide infoMeasured at the test nipple on the gas stopcock with the boiler at full load (check programme P.01 or P.03). MI prints 1.7 ... 2 kPa (17.0 ... 20 mbar). Technical data gives G20 gas supply pressure as 2.0 kPa (20.0 mbar). |
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Gas rate at maximum More infoHide infoHot water mode at P max (G20), from the technical data. Heating mode at P max: 12s 1.3, 15s 1.6, 18s 1.9, 25s 2.7, 30s 3.2 m³/h. MI 7.10.1 also gives a check table by Qnw on the data plate (nominal, +5%, −10%, m³/h): 15.3 kW 1.62, 1.70, 1.46; 18.4 kW 1.95, 2.05, 1.76; 24.7 kW 2.61, 2.74, 2.35; 25.7 kW 2.72, 2.86, 2.45; 28.6 kW 3.03, 3.18, 2.73; 30.6 kW 3.24, 3.40, 2.92; 35.7 kW 3.78, 3.97, 3.40. Measured at the gas meter after at least 5 minutes, front casing fitted, all other gas appliances off. |
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Flue integrity More infoHide infoAt the air inlet test point, boiler at maximum rate (Benchmark flowchart, Appendix I). | O₂ ≥ 20.6% CO₂ < 0.2% |
From 0020200964_04 (16.11.2017)
Enter service mode for high and low rate
High rate
Low rate
Models and GC numbers
| Model | GC number | Gas |
|---|---|---|
| ENERGY 12s -A (H-GB) | 41-019-16 | NG |
| ENERGY 15s -A (H-GB) | 41-019-17 | NG |
| ENERGY 18s -A (H-GB) | 41-019-18 | NG |
| ENERGY 25s -A (H-GB) | 41-019-19 | NG |
| ENERGY 30s -A (H-GB) | 41-019-20 | NG |
Source: Glow-worm ENERGY 12s, 15s, 18s, 25s, 30s installation and maintenance instructions, 0020200964_04 (16.11.2017).
Sections: 2.3 Validity of the instructions; 7.10.1 Checking the gas flow rate; 7.10.2 Checking the gas connection pressure; 7.10.3 Checking the leak-tightness of the flue gas installation; 7.10.5 Checking the CO₂ content; 10.4 Checking the CO₂ content; 10.5 Setting the CO₂ content; Appendix A Check programmes; Appendix I Commissioning Checklist; Appendix K Technical data.
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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.