British Gas ICC2 combi (ZWBR 8-30, 11-37)
Combi, natural gas and LPG
Combustion figures
| Figure | Natural gas (G20) | LPG (G31) |
|---|---|---|
CO₂ at high rate More infoHide infoAt max. rated heat output (service function 2.0 Operating mode set to Max). No tolerance given in MI. MI 8.1 Tables 15 and 16 and MI 1.9 Table 2 agree. Table 2 lists the propane models as ZWBR 11-30 and ZWBR 14-37; Tables 15 and 16 give the LPG G31 figure under the ZWBR 8-30 and ZWBR 11-37 headings. |
| 11.0% |
CO₂ at low rate More infoHide infoAt min. rated heat output (service function 2.0 Operating mode set to Min). No tolerance given in MI. | 9.2% | 11.0% |
Maximum CO | Not given in MI | Not given in MI |
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 infoMI wording: natural gas appliances must not be operated if the gas supply pressure is below 18 mbar or above 24 mbar; LPG appliances must not be operated if it is below or above 37 mbar. Checked at the gas supply pressure test point (Fig. 2, item 7, on the gas valve). MI 5.1 gives the LPG 37 mbar as at the inlet to the appliance. Natural gas appliances are factory set for 20 mbar supply pressure (MI 1.9 Table 2 and MI 8). |
|
|
Gas rate at maximum More infoHide infoAfter 10 minutes from lighting. NG G20 (CVnet 34.02 MJ/m³); LPG CVnet 88 MJ/m³. MI 1.9 Table 2 gives the LPG figures for the propane models ZWBR 11-30 and ZWBR 14-37. In MI 1.9 Table 2 the LPG figures are under the propane models: 2.2 kg/h under ZWBR 11-30 (the propane version of the 8-30, same heat input) and 2.7 kg/h under ZWBR 14-37 (the propane version of the 11-37). |
|
|
Flue integrity More infoHide infoAt the combustion air testing point (234.1), in chimney sweep mode. MI wording: O₂ must not be less than 20,6%; CO₂ must not exceed 0,2%. For type C13 and C33 flue systems. | O₂ ≥ 20.6% CO₂ ≤ 0.2% | O₂ ≥ 20.6% CO₂ ≤ 0.2% |
From 6 720 610 602 GB (03.02)
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 |
|---|---|---|
| ZWBR 8-30 ICC2 | 41-108-09 | NG |
| ZWBR 11-37 ICC2 | 41-108-10 | NG |
| ZWBR 11-30 propane (8-30 size) | Not added yet | LPG |
| ZWBR 14-37 propane (11-37 size) | Not added yet | LPG |
Source: ICC2 combi Installation and Servicing Instructions, 6 720 610 602 GB (03.02).
Sections: 1.6 Layout of appliance; 1.9 Technical data; 5.1 Commissioning; 8 Converting the appliance to different gas types (Checking the gas supply pressure); 8.1 Setting the gas/air ratio; 8.2.1 Testing the O2 or CO2 level in the combustion air; 8.2.2 Testing CO and CO2.
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.