Alpha InTec 50CS floor standing storage combi (50CS)
Floor standing storage combi, natural gas and LPG
Combustion figures
| Figure | Natural gas (G20) | LPG (G31) |
|---|---|---|
CO₂ at high rate More infoHide infoMI gives no tolerance. Check CO₂ in the flue at maximum and minimum rate (MI section 3), using the chimney sweep function (MI 3.4). | 9.40% | 10.50% |
CO₂ at low rate | 8.90% | 10.30% |
Maximum CO More infoHide infoThe MI gives no maximum CO. Its combustion settings table (MI 3.12) gives CO at 0% O₂ (air-free) at nominal / minimum output: NG 206 / 9 ppm, LPG 190 / 8 ppm. It doesn’t call these a maximum or a limit. | Not given in MI | Not given in MI |
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 infoMeasurement point not stated in MI. MI gives the supply pressure only, with no range or tolerance (MI 1.3 and 3.12). | 20 mbar | 37 mbar |
Gas rate at maximum More infoHide infoAt maximum heat output (MI 3.12). | 3.49 m³/h | 2.57 kg/h |
From Part No. 1.034294 rev. 15.039381/000 03/2013 D323
Enter service mode for high and low rate
High rate
- With no hot water or heating demand, hold RESET (button C) for 8 to 15 seconds. The chimney sweep symbol shows.
- Turn the central heating selector switch (item 3) to set the output. The MI doesn’t say which way is maximum.
Low rate
- Turn the central heating selector switch (item 3) the other way for minimum. The MI doesn’t say which end is minimum.
Ending the test
- Press the Stand-by / On button to switch the boiler off, then press it again to switch back on.
Models
| Model | Gas |
|---|---|
| InTec 50CS | NG |
| InTec 50CS LPG | LPG |
Source: Alpha InTec 50CS Installation, User and Servicing Instructions, Part No. 1.034294 rev. 15.039381/000 03/2013 D323.
Sections: 1.1 Introduction; 1.3 Connections; 3 Boiler start-up (initial check); 3.4 Chimney sweep function; 3.12 Combustion settings; 3.13 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.