| | Gas valve | |
| 28 | 111 867 | HONEYWELL VR4605PB2003 | |
| 28.2 | 111 869 | HONEYWELL VR4605AB 1019 | |
| 28.3 | 154 734 | Plug and lead | |
| 28.4 | 139 269 | Plug and lead | |
| 28.5 | 112 431 | Plug and lead | |
| 28.6 | 155 657 | Plug and lead | |
| 29 | 139 300 | Spark generator | |
| 31 | 013 180 | Injector 4.20mm diameter | |
| 32 | 138 895 | Flame detection electrode | |
| 32.1 | 139 271 | Flame detection lead | |
| 33 | 139 824 | Main burners Worgas | |
| 34 | 139 825 | Main burner (RH end) Worgas | |
| 36 | 112 365 | Ignition electrode | |
| 45 | 155 641 | Control box complete | |
| 46 | 154 816 | Thermistor | |
| 47.1 | 154 814 | PCB S4561B1047 (ignition) | |
| 48.1 | 154 815 | PCB W4115A1020 (Aquastat) | |
| 56 | 157 451 | Casing assembly complete | |
| 57 | 155 649 | Casing front panel | |
| 58 | 076 978 | Casing LH side panel | |
| 59 | 076 979 | Casing RH side panel | |
| 60 | 138 473 | Casing lower front panel | |
| 61 | 155 645 | Casing upper front panel | |
| 62 | 138 463 | Casing top panel | |
| 63A | 155 791 | Overheat thermostat RAK77.4/3835 | |
| 78 | 154 854 | Boiler status neons Boiler ON | |
| 79 | 154 855 | Boiler status neons Overheat & Lockout | |
| 80 | 155 269 | Lockout reset button assembly | |
