Vaillant ecoTEC exclusive combi (832, 838)
Combi, natural gas and LPG
Combustion figures
| Figure | Natural gas (G20) | LPG (G31) |
|---|---|---|
CO₂ at high rate More infoHide infoAfter 5 minutes at full load (test programme P.1), at the flue gas analysis point. When adjusting, set to the front casing removed figure. Same figures for both sizes (Table 8.1, Factory gas settings). |
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CO₂ at low rate | Not given in MI | Not given in MI |
Maximum CO More infoHide infoAt full load. | < 250 ppm | < 250 ppm |
CO/CO₂ ratio | < 0.0031 | < 0.0026 |
O₂ | Not given in MI | Not given in MI |
Working inlet pressure More infoHide infoThe NG size lines are at the gas valve test point (the reference test point: sealing screw marked ‘in’ on the gas valve, Table 6.4), as is the LPG figure. Boiler at full load in test programme P.1, front casing off. Section 5.2 also says the dynamic gas connection pressure must be at least 19–23 mbar for natural gas and 37 mbar for propane, and that the pipework must be sized so 20 mbar is available at the boiler inlet at full flow rate. Table 13.1 gives a connection pressure (gas flow pressure) of 20 mbar for G20 and 37 mbar for G31. |
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Gas rate at maximum More infoHide infoNominal figure, with the −10% and +5% limits from Table 6.3 in brackets (nominal net heat input 32 kW for the 832, 38 kW for the 838). Measured at the gas meter after at least 5 minutes in test programme P.1, front casing fitted, all other gas appliances off. Table 13.1 rounds the G20 figures to 3.4 and 4.0 m³/h; G31 figures are the same there. |
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Flue integrity More infoHide infoAt the air measure point on the flue adaptor (Fig. 6.5), with a flue gas analyser. MI gives no figure: if any CO or CO₂ is found in the fresh air, search for flue gas leakage or recirculation and correct it; if it can’t be corrected, don’t start the boiler. Strongly recommended when the flue is longer than 2 m. | No CO or CO₂ in the fresh air | No CO or CO₂ in the fresh air |
From 0020017768_05 GBIE 062010
Enter service mode for high and low rate
High rate
Low rate
Models and GC numbers
| Model | GC number | Gas |
|---|---|---|
| ecoTEC exclusive 832 | 47-044-37 | Not stated |
| ecoTEC exclusive 838 | 47-044-38 | Not stated |
Source: Vaillant ecoTEC exclusive installation and maintenance instructions, 0020017768_05 GBIE 062010.
Sections: 2.2 Type overview; 2.4 Gas council numbers; 5.2 Gas connection; 6.2 Checking the gas setting; 6.2.1 Checking for tightness of the flue gas installation and flue gas recirculation; 6.2.2 Checking the gas flow rate; 6.2.3 Checking the gas inlet working pressure; 8.1.3 Checking the CO₂ concentration; 8.1.4 Adjusting the CO₂ concentration; 9.2 Test programs; 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.