Glow-worm Betacom 3 combi (24c -A, 30c -A)
Combi, natural gas
Combustion figures
| Figure | Natural gas (G20) |
|---|---|
CO₂ at high rate More infoHide infoBoth at full load (check programme P.01 set to 100), read after 5 minutes once stable. The checking table (MI 7.9.4 and 11.3) gives ±1 %; the setting table (MI 11.4) gives ±0.2 % for CO₂ at full load. If the value is outside the checking range, set it to the setting figure. Same value with the front casing removed or installed. |
|
CO₂ at low rate | Not given in MI |
Maximum CO More infoHide infoThe manual gives two limits: ≤ 250 ppm at full load in the setting table (MI 11.4), and less than 350 ppm at maximum and minimum rate in the combustion chart (MI appendix I). |
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CO/CO₂ ratio More infoHide infoThe manual gives two limits: ≤ 0.0027 in the setting table (MI 11.4), and less than 0.004 at maximum and minimum rate in the combustion chart (MI appendix I). |
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O₂ at high rate More infoHide infoO₂ at full load, from the setting table (MI 11.4). | 4.5 ±1.8 vol. % |
O₂ at low rate | Not given in MI |
Working inlet pressure More infoHide infoPrinted as 1.7–2 kPa (17.0–20 mbar). Measured at the measuring nipple on the gas isolator cock, with the boiler at full load (check programme P.01) and all other gas appliances working. Technical data gives a G20 gas supply pressure of 20 mbar. |
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Gas rate at maximum More infoHide infoGas flow at P max. in hot water mode, G20 (technical data). |
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Flue integrity More infoHide infoAt the air inlet test point, boiler at maximum rate (combustion chart). | O₂ ≥ 20.6% CO₂ < 0.2% |
From 0020229560_00 (19.10.2015)
Enter service mode for high and low rate
High rate
Low rate
Models and GC numbers
| Model | GC number | Gas |
|---|---|---|
| Betacom 3 24c -A (H-GB) | 47-019-41 | NG |
| Betacom 3 30c -A (H-GB) | 47-019-42 | NG |
Source: Glow-worm Betacom 3 24c -A (H-GB), 30c -A (H-GB) installation and maintenance instructions, 0020229560_00 (19.10.2015).
Sections: 2.3 Applicability of the instructions; 7.9 Checking and adjusting the gas settings; 7.9.1 Checking the gas connection pressure; 7.9.2 Checking the leak-tightness of the flue gas system and for flue gas recirculation; 7.9.4 Checking the CO₂ content; 11.3 Checking the CO₂ content; 11.4 Setting the CO₂ content; A Check programmes; I Combustion chart; 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.