| 1 | 573294 | Expansion vessel | | |
| 11 | 573520 / 164 225 | Gasket 3/4" | | |
| 15 | 997206 | Overheat thermostat | | |
| 16 | 573224 | Main flow Switch | | |
| 19 | 569236 / 164 338 | Temp probe (C.H.W.) | | |
| 20 | 573340 | Microswitch for 3-way/main flow group | | |
| 24 | 573528 / 164 229 | Gasket 1/2" | | |
| 25 | 573727 / 378 814 | Manual vent cock | | |
| 26 | 573172 | Safety valve 3 bar 1/2" | | |
| 29 | 571649 | Pressure gauge | | |
| 32 | 997208 | Time clock | | |
| 44 | 953045 | P.C.B. E C-MI/FFI | | |
| 46 | 952981 | P.C.B. EI A-MFFI | | |
| 47 | 952610 | P.C.B. cable | | |
| 57 | 572990 | Fan | | |
| 58 | 573343 | Fan inlet gasket | | |
| 72 | 571652 / E02 071 | Air pressure switch | | |
| 75 | 570717 | Fastening spring | | |
| 84 | 564254 / 379 079 | Automatic air release valve | | |
| 85 | 569387 / 164 230 | Gasket 1" | | |
| 87 | 571449 | O-ring | | |
| 89 | 573295 | Secondary exchanger (plate-type) exchanger 27kW | | |
| 90 | 573825 | O-ring (secondary exchanger) | | |
| 92 | 571807 | O-ring (20-18) | | |
| 95 | 573521 / 164 282 | Gasket 3/8" | | |
| 96 | 997151 | Pump | | |
| 99 | 571965 | O-ring (13) | | |
| 100 | 574279 | Gasket | | |
| 101 | 574232 | Gas valve (SIT Sigma) | | |
| 107 | 574233 | Spark generator | | |
| 111 | 573441 / 379 981 | Detection electrode | | |
| 115 | 569390 / 164 261 | Gasket 1/4" | | |
| 117 | 569560 / 379 979 | Ignition electrode (R.H.) | | |
| 118 | 569561 / 379 980 | Ignition electrode (L.H.) | | |
| 119A | 998110 | Main burner | | |
| 119B | 998111 | Main burner | | |
| 120 | 572835 | Main exchanger | | |
| 126 | 573314 | Venturi (exhaust manifold/header) | | |
| 301 | 571993 | Front panel runner kit | | |
| 311 | 571444 | D.H.W. actuator kit | | |
| 321 | 997029 | SIT Sigma gas valve operator coils | | |
| 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 | 998152 | Burner jet 1.30 full kit (Natural gas) | | |
| 382 | 998432 | Burner jet 0.77 full kit | LPG | |
