Baxi EcoBlue Combi (24, 28, 33)
Combi, natural gas
Combustion figures
| Figure | Natural gas (G20) |
|---|---|
CO₂ at high rate More infoHide infoIn chimney sweep mode with the case front panel fitted and the system cold. The valve is checked and set at maximum DHW input (setting 2) and minimum input (setting 1). | 8.7% ± 0.2 |
CO₂ at low rate More infoHide infoIf CO₂ is reset at one rate, recheck it at the other rate. | 8.4% ± 0.2 |
Maximum CO More infoHide infoMeasured at the flue gas test point at maximum DHW input and minimum input. |
|
CO/CO₂ ratio |
|
O₂ More infoHide infoThe MI gives O₂ only for the flue integrity check at the air inlet test point (see Flue integrity). | Not given in MI |
Working inlet pressure More infoHide infoFigures from Fig. 41a, with the boiler at maximum rate. At the gas meter: 19–23 mbar. The text in 7.5.1 and the fault finding chart (G) instead say the pressure at the gas cock test point must be at least 17 mbar, and 11.2 gives a preferred minimum of 20 mbar (NG). Technical data gives a dynamic (nominal) inlet pressure of 20 mbar. |
|
Gas rate at maximum More infoHide infoNatural gas (G20), after 10 minutes, with all other appliances and pilot lights off. |
|
Flue integrity More infoHide infoAt the air inlet test point, with the boiler at maximum rate. | O₂ ≥ 20.6% CO₂ < 0.2% |
From 7212134 - 03 (09/14)
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 |
|---|---|---|
| Baxi EcoBlue 24 Combi | 47-075-81 | NG |
| Baxi EcoBlue 28 Combi | 47-075-82 | NG |
| Baxi EcoBlue 33 Combi | 47-075-83 | NG |
Source: Baxi EcoBlue Combi 24 - 28 - 33 Installation and Service Manual, 7212134 - 03 (09/14).
Sections: 3.1 Technical Data; 7.4.1 Checking Combustion - Chimney Sweep Mode; 7.5.1 Check the Operational (Working Gas Inlet Pressure & Gas Rate); 10.1 General; 10.3.25 Setting the Gas Valve (CO2 Check); 11.2 Fault Finding.
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.