Glow-worm Ultimate 3 combi (30c, 35c)
Combi, natural gas
Combustion figures
| Figure | Natural gas (G20) |
|---|---|
CO₂ at high rate More infoHide infoCheck programme P.01 set to 100 (full load), reading taken once stable (about 5 minutes), at the flue gas analysis point. The MI gives 9.2 ±1 % as the acceptable checking range (7.9.5 and 11.3) and 9.2 ±0.2 % as the figure to set to if adjustment is needed (11.4). Both tables are headed front casing removed/installed; 11.4 says the set value is with the front casing removed. |
|
CO₂ at low rate | Not given in MI |
Maximum CO More infoHide infoGiven as CO at full load (11.4). The generic combustion chart in Appendix J uses CO less than 350 ppm at maximum and minimum rate (one box in the chart says 335 ppm). | ≤ 250 ppm |
CO/CO₂ ratio More infoHide infoFrom the 11.4 table, alongside CO at full load. The generic combustion chart in Appendix J uses a ratio less than 0.004 at maximum and minimum rate. | ≤ 0.0027 |
O₂ at high rate More infoHide infoGiven as O₂ at full load in the Setting the CO₂ value table (11.4). | 4.5 ±1.8 vol. % |
O₂ at low rate | Not given in MI |
Working inlet pressure More infoHide infoPermissible connection pressure (G20), measured at the measuring nipple on the gas isolator cock with the boiler at full load (P.01 or P.03). Technical data gives G20 gas supply pressure as 20 mbar. |
|
Gas rate at maximum More infoHide infoGas flow at P max., hot water (G20), from Technical data. The gas flow rate table in 7.9.1 gives, by Qnw from the data plate: 30.6 kW 3.24 m³/h (+5% 3.40, −10% 2.92); 35.7 kW 3.78 m³/h (+5% 3.97, −10% 3.40). Measured at the gas meter with P.01 after at least 5 minutes. |
|
Flue integrity More infoHide infoAt the air inlet test point with the boiler at maximum rate (Appendix J combustion chart; 7.9.3). | O₂ ≥ 20.6% CO₂ < 0.2% |
From 0020239566_01 – 10.10.2016
Enter service mode for high and low rate
High rate
Low rate
Models and GC numbers
| Model | GC number | Gas |
|---|---|---|
| Ultimate 3 30c | 47-019-55 | NG |
| Ultimate 3 35c | 47-019-57 | NG |
Source: Glow-worm Ultimate 3 30c, 35c installation and maintenance instructions, 0020239566_01 – 10.10.2016.
Sections: 2.3 Applicability of the instructions; 7.9 Checking and adjusting the gas ratio setting; 7.9.1 Checking the gas flow rate; 7.9.2 Checking the gas connection pressure; 7.9.3 Checking the leak-tightness of the flue gas installation and flue gas recirculation; 7.9.5 Checking the CO₂ content; 11.3 Checking the CO₂ content; 11.4 Setting the CO₂ content; A Check programmes; J Combustion chart; L 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.