Vaillant ecoTEC plus 937 combi (937)
Combi with 15 l stratified store, 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 program P.1), measured at the flue gas analysis point. When adjusting, set to the front casing removed figure (MI 8.1.4). LPG figures are for the boiler converted with Vaillant kit 0020010641. |
|
|
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 infoMinimum and maximum at the reference test point marked in on the gas valve, boiler at full load in test program P.1. MI 5.11 says the supply pipework must give 20 mbar at the boiler inlet at maximum output (gas type not stated). Technical data gives required gas flow pressure: NG 20 mbar, LPG 37 mbar (point not stated). |
|
|
Gas rate at maximum More infoHide infoNominal net heat input 37.8 kW (BS EN 483). Measure at the gas meter with the front casing fitted, after at least 5 minutes in test program P.1, with all other gas appliances off. | 4.00 m³/h (+5% 4.20, −10% 3.60) | 2.94 kg/h (+5% 3.09, −10% 2.65) |
Flue integrity More infoHide infoCheck with the flue gas analyser at the air measure point (MI Fig. 6.6). Strongly recommended if the flue is longer than 2 m. If any CO or CO₂ is found in the fresh air, find and correct the leak or recirculation; if it can’t be corrected, don’t start the boiler. | No CO or CO₂ at the air measure point | No CO or CO₂ at the air measure point |
From 0020031552_06 GBIE 102010
Enter service mode for high and low rate
High rate
Low rate
Models and GC numbers
| Model | GC number | Gas |
|---|---|---|
| ecoTEC plus 937 | 47-044-39 | NG |
Source: Vaillant ecoTEC plus 937 installation and maintenance instructions, 0020031552_06 GBIE 102010.
Sections: 1.8 Gas Council Number; 2.2 Technical data; 2.5 Functional description; 5.11 Gas connection; 6.9 Checking the gas setting; 6.9.1 Checking for tightness of the flue gas installation and flue gas recirculation; 6.9.2 Checking the gas flow rate; 6.9.3 Checking the gas inlet working pressure; 6.12 Converting the gas type; 8.1.3 Checking the CO₂ concentration; 8.1.4 Adjusting the CO₂ concentration (or the air ratio); 9.2 Test programmes.
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.