Brown water in the gauge glass / priming
Zhongde LYF2.0/300-0.7, composite boiler (oil-fired and exhaust gas)
Possible cause
Oil or dirt in the boiler water
What to do
Manufacturer's manual, p. 92Open the scum valve to remove contamination, find the oil source, test the water
See the assembly on the 3D model
Other Zhongde LYF2.0/300-0.7 faults
Water level below the lowest visible part of the gaugeFeed failure or level control faultSafety valve does not lift at set pressureSticking or wrongly set valveHeating surface red-hot or deformedOverheating, low water or scaleCoke or smoke in the furnaceBurner out of adjustmentWater level gauge leaksLoose nuts or worn cock packing
From the manufacturer's manual “EM-3 ZHONGDE BOILER”. Check against the original on board before work.