当冷水通过热水器时,水流开关开始旋转检测水流,热水器风扇开始排气,排出炉内残余气体,进入氧气;此时,水气联动阀开关开始移动。打开开关电源,运行脉冲控制器,打开天然气电磁阀。天然气进入消防排,听到点火声,几秒钟后点火成功;点火装置具有热耦合元件。检测到火焰后,脉冲控制器自动退出并停止点火。
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