| A | 720768101 | Fan | | |
| B3 | 7212448 | Burner - 32 | | |
| C | 720767301 | Spark Ignition Electrode | | |
| D2 | 7211855 | Flame Sensing Electrode 32 | | |
| E | 7214341 | Gas Valve | | |
| F | 720765301 | Safety Thermostat | | |
| K | 7220533 | Pump | | |
| M | 720747101 | Heating Flow/Return Sensor | | |
| O | 720777601 | Pump Automatic Air Vent | | |
| P | 720778001 | Hydraulic Pressure Switch | | |
| Q | 7212896 | Heating Pressure Gauge | | |
| R | 720851401 | Flue Sensor | | |
| S1 | 7222713 | PCB - 12 ErP | | |
| S2 | 7222714 | PCB - 15 ErP | | |
| S3 | 7222715 | PCB - 18 ErP | | |
| S4 | 7222716 | PCB - 24 ErP | | |
| S5 | 7222717 | PCB - 28 ErP | | |
| S6 | 7222718 | PCB - 32 ErP | | |
| U5 | 7212533 | ¯6.0 Gas Nozzle Injector - 32 | | |
| V4 | 7211859 | Air/Gas Venturi - 32 | | |
| W | 7211868 | Boiler Control HMI PCB | | |
