| 1 | 8277 | Gas Valve Complete | | |
| 2 | 4254 | Auto Air Vent | | |
| 3 | 5351 | Main Heat Exchanger | | |
| 4 | 8478 | Spark Electrode | | |
| 5 | 8301 | Sense Electrode | | |
| 6 | 6025 | Grundfos UPS 15-50 AO Pump | | |
| 7 | 7618 | Fan | | |
| 8 | 714 | Flow Diapragm | | |
| 9 | 870 | Domestic Diapragm | | |
| 10 | 7070 | Pressure Differential Switch | | |
| 11 | 5298 | Main Burner | | |
| 12 | 8360 | Ignition Control Box | | |
| 13 | 9797 | Gas Service Cock | | |
| 14 | 9764 | Cold Water Inlet Service Cock (Adjustable) | | |
| 15 | 9266 | Expansion Vessel | | |
| 16 | 8484 | Thermistor | | |
| 17 | 8809 | Combined Pressure & Temperature Gauge | | |
| 18 | 6901 | Modulator Coil Complete | | |
| 19 | 8036 | Domestic Heat Exchanger | | |
| 20 | 9763 | Heating Flow & Return Valves | | |
| 21 | 8367 | Safety Thermostat | | |
| 22 | 4931 | Fan Overrun thermostat | | |
| 23 | 4250 | Safety Valve | | |
| 24 | 828 | D.H.W. & Flow Microswitch | | |
