Vaillant ecoTEC pro combi (24, 28)
Combi, natural gas
Combustion figures
| Figure | Natural gas (G20) |
|---|---|
CO₂ at high rate More infoHide infoAfter 5 minutes in full load mode (test program P.1), measured at the flue gas analysis point. If adjustment is needed, set it to the front removed figure (MI 7.1.4). |
|
CO₂ at low rate | Not given in MI |
Maximum CO More infoHide infoAt full load. | < 250 ppm |
CO/CO₂ ratio | < 0,0031 |
O₂ | Not given in MI |
Working inlet pressure More infoHide infoAt the reference test point (sealing screw marked in on the gas valve), measured at full load in test program P.1. The MI also asks for the gas pipework to be sized so 20 mbar is available at the boiler inlet at full flow rate (MI 4.9), the technical data gives the inlet gas working pressure required as 20 mbar with no measurement point (MI 2.1), and the fault finding checks say 20 mbar should be available at the gas valve (MI 8.1). |
|
Gas rate at maximum More infoHide infoNominal rate with the +5% and −10% tolerance limits (Table 5.1). Measured at the gas meter after at least 5 minutes in test program P.1, with all other gas appliances off. The technical data gives a rounded connected load at 15 °C and 1013 mbar: 24: 2.5, 28: 3.0 m³/h (MI 2.1). |
|
Flue integrity More infoHide infoChecked with the flue gas analyser at the air measure point; strongly recommended where the flue is longer than 2 m. If any CO or CO₂ is found, find and correct the flue gas leak or recirculation; if it can’t be corrected, don’t start the boiler (MI 5.9.1). | No CO or CO₂ in the fresh air |
From 839592_12 GBIE 062010
Enter service mode for high and low rate
High rate
Low rate
Models and GC numbers
| Model | GC number | Gas |
|---|---|---|
| ecoTEC pro 24 | 47-044-36 | NG |
| ecoTEC pro 28 | 47-044-30 | NG |
Source: Instructions for installation and servicing ecoTEC, 839592_12 GBIE 062010.
Sections: 1.3 Introduction; 1.7 Gas council numbers; 2.1 Technical data; 4.9 Gas connection; 5.9.1 Checking for tightness of the flue gas installation and flue gas recirculation; 5.9.2 Checking the gas flow rate; 5.9.3 Checking the gas inlet working pressure; 7.1.3 Checking the CO2 concentration; 7.1.4 Adjusting the CO2 concentration (or the air ratio); 8.1 Logical fault finding procedure; 8.2 Test programs.
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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.