| 9 | 171 414 / E83-619 | Sightglass assembly kit | | |
| 12 | 171 013 / E72-531 | Main burner | | |
| 13 | 171 425 / E83-624 | Main burner injector | | |
| 14 | 171 434 / E83-627 | Pilot burner injector | | |
| 15 | 171 438 / E83-630 | Pilot burner head with injector | | |
| 17 | 171 441 / E83-633 | Gas valve kit | | |
| 18.1 | 171 973 / E85-893 | Detection electrode | | |
| 19 | 171 928 / E85-894 | Control box assembly & PCB | | |
| 23 | 173 799 / H20-882 | PCB25E | | |
| 25 | 171 970 / E85-895 | Boiler thermostat | | |
| 26 | 171 929 / E85-896 | Thermostat knob | | |
| 35 | 173 590 / H09-107 | Boiler casing assembly complete | | |
| 37 | 173 592 / H09-109 | Controls casing door complete | | |
| 39 | 079 594 | Casing sealing kit | | |
| 45 | 171 950 / E83-682 | Overheat thermostat | | |
