Baxi Duo-tec Combi HE (24 HE, 28 HE, 33 HE, 40 HE)
Combi, natural gas
Combustion figures
| Figure | Natural gas (G20) |
|---|---|
CO₂ at high rate More infoHide infoIn Calibration Mode at maximum rate (display reads 00), after running the boiler for several minutes, with the analyser probe in the flue adaptor test point. Case on or off not stated in MI. | 8.7% ± 0.2 |
CO₂ at low rate More infoHide infoIn Calibration Mode at minimum rate (display reads 0). If the CO₂ is reset at either rate, recheck at the other rate. | 8.4% ± 0.2 |
Maximum CO | Not given in MI |
CO/CO₂ ratio | Not given in MI |
O₂ | Not given in MI |
Working inlet pressure More infoHide infoMeasurement point not stated in MI. Technical data gives inlet pressure 20 mbar; commissioning (11.3) says the gas supply pressure should be 20 mb; fault finding (18.1) says the preferred minimum gas pressure is 20 mbar. Fault finding chart I says check the gas supply pressure is greater than 10–11 mbar for natural gas. | 20 mbar |
Gas rate at maximum More infoHide infoNatural gas G20, after 10 minutes. Commissioning (11.3) gives the same figures as approximate values, measured in Calibration Mode at maximum rate with other gas appliances and pilot lights off. |
|
From UK Comp No 5122323 - Iss 3 - 7/07
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 |
|---|---|---|
| Duo-tec Combi 24 HE | 47-075-23 | NG |
| Duo-tec Combi 28 HE | 47-075-25 | NG |
| Duo-tec Combi 33 HE | 47-075-24 | NG |
| Duo-tec Combi 40 HE | 47-075-26 | NG |
Source: Baxi Duo-tec Combi HE Range installation & servicing instructions, UK Comp No 5122323 - Iss 3 - 7/07.
Sections: Models and GC numbers (page 2); 4.1 Technical Data; 11.3 Checking; 15.1 Checking the CO₂; 18.1 Initial Fault Finding Checks; 18.0 Fault finding chart I.
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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.