Газовый 🔥 котёл. Падает давление - смотри первичный теплообменник.

Electrolux Quantum 24 Fi gas boiler. The Electrolux boiler's weak point is the primary heat exchanger. According to forum reviews, they fail after 4-5 years of use. First, it begins to sweat, then "cry." These are microcracks. On a cold heat exchanger, they initially don't show any signs. During operation, the water escaping from the cracks has time to evaporate. It's also difficult to find the leak. Eventually, it will definitely show up! The primary heat exchanger fails due to severe contamination of the secondary DHW heat exchanger. This depends on the water quality and the intensity of hot water use, as well as the condition of the faucet aerator or shower head. I've concluded that this problem can be avoided by cleaning the secondary heat exchanger once or twice a year, provided that hot water is used frequently and the tap water has a high mineral content. Symptoms of imminent failure of the main heat exchanger: a long wait for hot water. First it's cold, then very hot, and a little later it returns to normal, meaning the system isn't functioning properly; abnormal boiler noise—hissing and crackling (like an old kettle with scale); A strong flame in the burner remains for an extended period, heating the primary heat exchanger to a temperature above 85 degrees Celsius (scale buildup in the secondary heat exchanger causes the DHW temperature sensor to signal the burners to "turn up the heat" in the primary heat exchanger). The large difference between the initial and final temperatures in the primary heat exchanger leads to scale buildup there as well, which leads to microcracks; The pressure in the heating system drops, initially subtly and rather slowly, but with each passing moment this process accelerates and intensifies; In summer mode, after closing the hot water tap, the temperature on the display changes abruptly, approaching 100 degrees (this may not be recorded on some boiler models, but on the Electrolux, the temperature rises and then drops again); Strong steam comes out of the chimney even in relatively warm weather; The final sad detail is a puddle under the boiler. #gasboiler #heat exchanger #boilerrepair