| 12.4 | 150 093 | Boiler body insulation | |
| 23 | 150 153 | LH Main burner Worgas 0.087.751 | |
| 24 | 150 149 | Centre and RH main burners Worgas 0.087.750 | |
| 26 | 111 323 | Main burner injectors Size 3.4 mm; | |
| 29 | | Gas control valves | |
| 111 867 | HONEYWELL VR4605PB 2003 | |
| 29.7 | 111 870 | Gas control valve plug and lead assemblies | |
| 154 734 | Gas control valve plug and lead assemblies | |
| 32 | 112 365 | Ignition electrode BE/3417/SI | |
| 33 | 112 364 | Flame detector electrode BE/3459/SI | |
| 30 | 112 721 | Spark generator assembly | |
| 112 448 | Flame detector lead | |
| 37 | 112 289 | Electronic thermostat sensor and lead assembly | |
| 40 | 155 791 | Overheat thermostat | |
| 41 | 154 328 | Control box assembly - complete | |
| 42 | 069 957 | PCB 34 | |
| 43 | 069 960 | PCB 35 | |
| 44 | 069 958 | Real time clock | |
| 46 | 069 961 | Ribbon cable | |
| 48 | 111 650 | RH casing side panel | |
| 49 | 111 650 | LH casing side panel | |
| 50 | 111 293 | Casing top panel | |
| 51 | 171 844 | Casing lower front panel - complete with lighting instructions. | |
| 52 | 154 846 | Casing upper front control panel (less controls) | |
| 53 | 157 479 | Casing assembly - complete | |
