[SpecialLong]
| Model | ND-20 | power supply | 200V/60Hz or 50Hz | 
| supply | Supports LPG 2.8kPa and LNG 2.0kPa | detection | Flame rod detection | 
| capacity | 232.6kW (200,000kcal/h) | ignition | Automatic high voltage spark ignition | 
| control | Proportional control method (combustion air frequency control/equal pressure valve control) | operation | Terminal box end | 



