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Brown water in the gauge glass / primingZhongde LYF2.0/300-0.7, 故障, 第 92 页Oil or dirt in the boiler water. Open the scum valve to remove contamination, find the oil source, test the waterZhongde LYF2.0/300-0.7组合式锅炉（燃油 + 废气）, 第 10 页Zhongde LYF2.0/300-0.7 — composite boiler, manual and drawings | Zhongde | LYF2.0/300-0.7 | Composite … Zhongde LYF2.0/300-0.7组合式锅炉（燃油 + 废气）, 第 3 页Zhongde LYF2.0/300-0.7 — composite boiler, manual and drawings | Zhongde | LYF2.0/300-0.7 | Composite … Zhongde LYF2.0/300-0.7组合式锅炉（燃油 + 废气）, 第 7 页Zhongde LYF2.0/300-0.7 — composite boiler, manual and drawings | Zhongde | LYF2.0/300-0.7 | Composite …