Glow-worm Ultimate combi (30c, 35c)
Combi, natural gas and LPG
Combustion figures
| Figure | Natural gas (G20) | LPG (G31) |
|---|---|---|
CO₂ at high rate More infoHide infoSame for both sizes. Test mode P.01 set to Hi, wait about 5 minutes for a stable reading, at the combustion analyser sample point on the flue adaptor. Case on is the check figure, case off is the setting figure (MI 17.3.3). LPG case off: the servicing table (MI 17.3.3) gives 10.1 ± 0.2%, the technical data (MI 5) gives 10.1 ± 0.3%. The gas conversion table (MI 15.1.2) has the case on and case off figures the other way round from MI 5 and MI 17.3.3 for both gases (NG case on 9 ± 0.2%, case off 9.2 ± 0.3%; LPG case on 10.1 ± 0.2%, case off 10.3 ± 0.3%). |
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CO₂ at low rate More infoHide infoSame for both sizes. Given only in the technical data (MI 5), at Qmin. The servicing section gives no low rate check. |
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Maximum CO | Not given in MI | Not given in MI |
CO/CO₂ ratio More infoHide infoMust not be exceeded. Same for both sizes (MI 17.3.3). | 0.004 | 0.004 |
O₂ | Not given in MI | Not given in MI |
Working inlet pressure More infoHide infoNominal supply pressure, checked at the gas service isolation valve test point with all other gas appliances operating (MI 11.7.1). The MI gives no range. It also says the safe nominal maximum heat input can be reached at an inlet pressure down to 15 mbar. |
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Gas rate at maximum More infoHide infoApproximate, after 10 minutes from cold, from the gas rate table (MI 11.7.2). In the technical data (MI 5) the NG figures match the maximum DHW gas flow rate (maximum heating 2.65 and 3.24 m³/h), but the LPG figures match the maximum heating gas flow rate; the maximum DHW LPG figures there are 2.38 kg/h (30) and 2.77 kg/h (35). |
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From 0020167175_01 - 02/13
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 |
|---|---|---|
| Ultimate 30c | 47-044-48 | NG |
| Ultimate 35c | 47-044-49 | NG |
Source: Glow-worm Ultimate 30c, Ultimate 35c Installation and Servicing, 0020167175_01 - 02/13.
Sections: 5 Technical data; 11.7 Gas rates; 11.7.1 Operational gas inlet pressure; 11.7.2 Gas rate; 12.5 Test modes; 15.1.2 Adjusting the maximum power setting; 17.3.3 Maximum rate check and adjustment.
Spotted something wrong? Tell us.
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.