| 摘要 |
A dual fuel heating apparatus can include a safety control system having a shutoff valve, a thermocouple solenoid assembly, a first nozzle, and a second nozzle. The first nozzle can be positioned to direct heat from combustion of a first gas, liquid, or combination thereof towards the thermocouple solenoid assembly when the first gas, liquid, or combination thereof is being combusted. The second nozzle can be positioned to direct heat from combustion of a second gas, liquid, or combination thereof towards the thermocouple solenoid assembly when the second gas, liquid, or combination thereof is being combusted. The thermocouple solenoid assembly can be configured to maintain the shutoff valve in an open position based on heat from combustion directed to the thermocouple solenoid assembly or in a closed position based on an absence of heat from combustion directed to the thermocouple solenoid assembly.
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