| 431 / | HD | COMBUSTION |
| 258 | ![]() | BURNER HAVING ELECTRICAL HEATER OR IGNITER {4} |
| 259 | DF | .~> Igniter and separate heater |
| 260 | DF | .~> Adjacent exposed liquid fuel surface on fuel support {1} |
| 263 | DF | .~> Igniter in shelter chamber |
| 264 | DF | .~> Spark electrode in front of or adjacent fuel discharger {2} |