| 1 | 573294 | Expansion vessel | | |
| 11 | 573520 / 164 225 | Gasket 3/4" | | |
| 14 | 997206 / 164 338 | Overheat thermostat | | |
| 17 | 573224 | Main flow Switch | | |
| 18 | 569236 / 164 338 | Temp probe (C.H.W.) | | |
| 19 | 573340 | Microswitch for 3-way/main flow group | | |
| 23 | 573528 / 164 229 | Gasket 1/2" | | |
| 24 | 573727 / 378 814 | Manual vent cock | | |
| 25 | 573172 | Safety valve 3 bar 1/2" | | |
| 28 | 571649 | Pressure gauge | | |
| 31 | 997208 | Time clock | | |
| 43 | 953045 | P.C.B. E C-MI/FFI | | |
| 45 | 952981 | P.C.B. EI A-MFFI | | |
| 46 | 952610 | P.C.B. cable | | |
| 56AB | 572989 | Fan | | |
| 56CD | 572990 | Fan | | |
| 57 | 573343 | Fan inlet gasket | | |
| 60 | 573314 | Venturi (exhaust manifold/header) | | |
| 71AB | 571651 / E02 071 | Air pressure switch | | |
| 71CD | 571652 / E02 071 | Air pressure switch | | |
| 74 | 570717 | Fastening spring | | |
| 83 | 564254 / 379 079 | Automatic air release valve | | |
| 84 | 569387 / 164 230 | Gasket 1" | | |
| 86 | 571449 | O-ring | | |
| 88CD | 573295 | Secondary exchanger (plate-type) exchanger | | |
| 89 | 573825 | O-ring (secondary exchanger) | | |
| 91 | 571807 | 20-18 O-ring | | |
| 94 | 573521 / 164 282 | Gasket 3/8" | | |
| 96AB | 997150 | Pump | | |
| 96CD | 997151 | Pump | | |
| 99 | 574232 / 379 976 | Gas valve (SIT Sigma) | | |
| 101 | 574233 | Spark generator | | |
| 104 | | O-ring (13) | | |
| 112 | 573441 / 379 981 | Detection electrode | | |
| 116 | 569390 / 164 261 | Gasket 1/4" | | |
| 118 | 569560 / 379 979 | Ignition electrode (R.H.) | | |
| 119 | 569561 / 379 980 | Ignition electrode (L.H.) | | |
| 120A | 572271 / E02 026 | Main burner | | |
| 120B | 572277 | Main burner | | |
| 120C | 572343 / E02 078 | Main burner | | |
| 120D | 572372 | Main burner | | |
| 121AB | 572749 | Main exchanger | | |
| 121CD | 572835 | Main exchanger | | |
| 301 | 571993 | Front panel runner kit | | |
| 311 | 571444 | D.H.W. actuator kit | | |
| 321 | 570712 / 378 978 | SIT Sigma gas valve operator coils | | |
| 322 | 573740 / 378 815 | SIT Tandem modureg coil | | |
| 323 | 573745 / 164 303 | Gas modulator cartridge | | |
| 361 | 571443 | Heating by-pass kit | | |
| 362 | 571442 | D.H.W. pressure switch kit | | |
| 363 | 571447 | 3-way spring kit | | |
| 364 | 571446 | D.H.W. diaphram valve | | |
| 371 | 571547 | Main flow switch diaphram | | |
| 372 | 571772 | Main flow switch magnet | | |
| 373 | 571771 | Main flow switch spring | | |
| 374 | 571770 | Main flow switch top cap | | |
| 375 | 573138 | Main flow switch reed system | | |
| 381 | 569281 / 164 311 | Burner jet 1.25 full kit (Natural gas) | | |
| 382 | 569282 | Burner jet 0.72 full kit | LPG | |
