| 300 | | Installation instructions | | |
| 301 | | Service instructions | | |
| 302 | | Thermal insulation, small parts | | |
| 303 | | Touch-up spray paint, Vitosilver | | |
| 304 | | Touch-up paint stick, Vitosilver | | |
| 305 | | Flame tube gasket | | |
| 1 | | Boiler door | | |
| 2 | | Studs | | |
| 3 | | Sight glass parts, comprising: pos. 004 to 007 | | |
| 4 | | Sight glass frame | | |
| 5 | | Gasket | | |
| 6 | | Hose nozzle | | |
| 7 | | Plastic hose | | |
| 8 | | Hose pack Ø 18 mm | | |
| 9 | | Thermal insulation block | | |
| 10 | | Thermal insulation mat | | |
| 12 | | Packing GF 20 x 15 mm | | |
| 19 | | Cleaning brush wearing part | | |
| 20 | | Complete cleaning equipment (incl. extraction hook and pos. 019) | | |
| 21 | | Burner plate*1 | | |
| 22 | | Burner plate gasket*1 | | |
| 200 | | Front panel, top | | |
| 206 | | Top panel, right | | |
| 207 | | Top panel, left | | |
| 208 | | Control unit fascia | | |
| 214 | | Fixing rail, top | | |
| 13 | | Internal pipe | | |
| 14 | | Gasket | | |
| 15 | | Cleaning cover | | |
| 16 | | Packing | | |
| 17 | | Sensor well, boiler water temperature sensor | | |
| 18 | | Therm-Control sensor well | | |
| 201 | | Front panel, bottom | | |
| 202 | | Back panel, top | | |
| 203 | | Back panel, bottom | | |
| 204 | | Side panel, front right | | |
| 205 | | Side panel, front left | | |
| 209 | | Thermal insulation jacket | | |
| 210 | | Thermal insulation mat, back | | |
| 211 | | Thermal insulation mat, flue gas collector | | |
| 212 | | Vitoplex 300 logo | | |
| 213 | | Edge protector | | |
| 215 | | Fixing rail, bottom | | |
| 216 | | Side panel, centre (only from 390 kW) | | |
| 217 | | Side panel, back right | | |
| 218 | | Side panel, back left | | |