Water level gauge leaks
Zhongde LYF2.0/300-0.7, composite boiler (oil-fired and exhaust gas)
Possible cause
Loose nuts or worn cock packing
What to do
Manufacturer's manual, p. 13Retighten union nuts and bottom screws; if it still leaks renew the packing sleeve or cock plug
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 faultBrown water in the gauge glass / primingOil or dirt in the boiler waterSafety 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 adjustment
From the manufacturer's manual “EM-3 ZHONGDE BOILER”. Check against the original on board before work.