Worcester Bosch Greenstar CDi Conventional (30CDi, 40CDi)
Regular boiler, natural gas and LPG
Combustion figures
| Figure | Natural gas (G20) | LPG (G31) |
|---|---|---|
CO₂ at high rate More infoHide infoFrom the CO₂ setting table in Setting the gas/air ratio, 5. Setting the CO₂ (MI page 48), boiler at maximum in boost mode. CO₂ should be measured 10 minutes after firing the appliance. The technical data (MI page 6) gives the same figures without a tolerance. The MI says combustion is factory set and no adjustment is needed if the gas inlet pressure is correct (MI page 34). |
| 11.5 % ±0.2 |
CO₂ at low rate More infoHide infoFrom the CO₂ setting table (MI page 48), heating control set to minimum while in boost mode. The technical data gives the same figures without a tolerance. |
| 10.5 % ±0.2 |
Maximum CO More infoHide infoFrom Setting the gas/air ratio (MI page 48), checked at maximum. | less than 200 ppm | less than 200 ppm |
CO/CO₂ ratio | Not given in MI | Not given in MI |
O₂ | Not given in MI | Not given in MI |
Working inlet pressure More infoHide infoMeasured at the gas valve inlet point (inlet test nipple) with the boiler running at maximum in boost mode, with all other gas appliances working (MI Commissioning, page 34). Setting the gas/air ratio (MI page 48) gives both as minimums: a minimum of 18 mbar for natural gas and 37 mbar for LPG. The MI gives no appliance inlet or meter figure. |
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Gas rate at maximum More infoHide infoMax. 10 minutes from lighting, natural gas figures for G20 (MI Technical data, page 6). Measure at the gas meter after 10 minutes at maximum (MI Commissioning, page 34). The technical data gives a max. rated heat input of 30.9 kW (30CDi) and 42.0 kW (40CDi), for both gases. |
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From 6 720 614 556a (2007/07)
Enter service mode for high and low rate
High rate
- Hold the boost button (below the spanner button) for 10 seconds until it lights and stays lit.
- Turn the temperature control to max. The boiler goes to maximum.
Low rate
- Turn the temperature control to minimum. The boiler goes to minimum.
- Turn it back to max to return to maximum.
Ending the test
- Hold the boost button for 2 seconds. Its light goes out and the blue power light stays on.
- It also ends by itself after 15 minutes.
Models and GC numbers
| Model | GC number | Gas |
|---|---|---|
| Greenstar 30CDi Conventional | 41-311-71 | NG |
| Greenstar 40CDi Conventional | 41-311-72 | NG |
| Greenstar 30CDi Conventional LPG | 41-311-73 | LPG |
| Greenstar 40CDi Conventional LPG | 41-311-74 | LPG |
Source: Worcester Bosch Greenstar 30CDi/40CDi Conventional wall hung RSF gas-fired condensing regular boiler installation, commissioning and servicing instructions, 6 720 614 556a (2007/07).
Sections: Cover (GC numbers); Technical data (page 6); Commissioning (page 34); Setting the gas/air ratio, 5. Setting the CO₂ (page 48).
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.