Baxi Neta-tec Plus Combi GA (24 GA, 28 GA, 33 GA)
Combi, natural gas and LPG
Not in the database yet:
- This PDF stops at MI p. 31, so MI section 14 Combustion & Calibration (MI p. 42) is missing: check it for CO₂ at high and low rate, maximum CO and O₂ (MI section 14)
Combustion figures
| Figure | Natural gas (G20) | LPG (G31) |
|---|---|---|
CO₂ at high rate More infoHide infoThe technical data (MI 4.1) gives one CO₂ figure without saying which rate, so it is shown in both rows. Rate not stated in MI. Section 14 Combustion & Calibration (MI p. 42) isn’t in this PDF and may give figures for each rate. The MI says combustion is factory set and checked by the boiler’s Gas Type Check: no combustion measurement is needed at commissioning and the air/gas ratio valve must not be adjusted (MI 10.1). | 9.0% ± 0.7 | 10.5% ± 1.0 |
CO₂ at low rate More infoHide infoSame single technical data figure as the high rate row. Rate not stated in MI. | 9.0% ± 0.7 | 10.5% ± 1.0 |
Maximum CO | Not added yet – see MI 14 | Not added yet – see MI 14 |
CO/CO₂ ratio More infoHide infoAt maximum rate, at the flue sampling point (MI 12.1). The MI gives one figure, not split by gas type. | Less than 0.004 | Less than 0.004 |
O₂ More infoHide infoSection 14 isn’t in this PDF, so whether the MI gives O₂, and at which rate, isn’t known yet. | Not added yet – see MI 14 | Not added yet – see MI 14 |
Working inlet pressure More infoHide infoAt the inlet gas pressure test point on the gas valve (Fig. 41), boiler at maximum in Chimney Sweep Function (MI 10.2). The MI prints 17mb and 37mb. Technical data (MI 4.1) gives inlet pressure NG 20 mbar, LPG 37 mbar, without saying where it is measured. |
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Gas rate at maximum More infoHide infoAfter 10 minutes (MI 4.1), with all other gas appliances and pilot lights off (MI 10.2). |
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From © Baxi Heating UK Ltd 2012 (no document number in this PDF)
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 |
|---|---|---|
| Neta-tec Plus Combi 24 GA | 47-075-64 | Not stated |
| Neta-tec Plus Combi 28 GA | 47-075-65 | Not stated |
| Neta-tec Plus Combi 33 GA | 47-075-66 | Not stated |
Source: Baxi Neta-tec Plus Combi GA Range Installation & Servicing Instructions, © Baxi Heating UK Ltd 2012 (no document number in this PDF).
Sections: Model Range (p. 2); 4.1 Technical Data; 10.1 Commissioning the Boiler; 10.2 Check the Operational (Working) Gas Inlet Pressure & Gas Rate; 12.1 Performance Safety Check & Annual Servicing.
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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.