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Excessive Temperature in DEFRO Eko Duo Uni 25KW Summer Mode: Overheating Beyond Set 45 Degrees

Bałdyzer 12372 8
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 16325630
    Bałdyzer
    Level 12  
    A few days ago I switched my DEFRO Eko Duo Uni 25KW oven to summer mode, i.e. heating only the boiler with hot water, the mixing valve obviously went to zero. The boiler temperature is set at 45 degrees, and the current value often reaches 85 degrees. Of course, this is unnecessary because we do not need such hot water at home.
    Why in summer mode the furnace will not adjust the combustion so that after exceeding the set 45 degrees only give the minimum amount of fuel necessary only to support the furnace?
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  • #2 16325970
    michcior
    Level 30  
    What is your house like? The gangster of the Polish "market" of heating is paranoid oversizing of the heat source, it pays for someone but not for the user :(
    The coal-friendly company has a special "summer" blend with reduced calories. You can look for such fuel.
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  • #3 16326201
    Bałdyzer
    Level 12  
    The house is about 250m but it is not about heating the house, only the 300 liters boiler in summer mode. Stove when the water temperature in the boiler is 80 degrees and the set temperature is 45 degrees, it should be constantly supported and give the minimum amount of coal so that it does not go out in the hearth
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  • #4 16326221
    michcior
    Level 30  
    What about Tech? Did you call them?
  • #5 16326262
    Bałdyzer
    Level 12  
    Tomorrow a professional who has sold and assembled this furnace will come because the warranty is still in force
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  • #6 16337344
    charlee
    Level 20  
    Take into account that the boiler working in the sustain mode also heats up, When the temperature in the boiler exceeds 85 degrees (as it is with me), it switches the heating pump on, to cool down.
    And in this case it does not matter whether it is in summer or winter mode, whether there is a demand for domestic hot water or not. Then it overheats hot water, especially if it has not been used for a long time.
  • #7 16337404
    Bałdyzer
    Level 12  
    Or maybe shorten the feeding time to a minimum, e.g. for 1-2 seconds and maximize the feeding interval?
  • #8 16337455
    charlee
    Level 20  
    It is possible - but the heat obtained will have to be given away anyway, while the temperature rise will be slower, which in connection with the consumption of domestic hot water may eliminate the problem.
  • #9 16337526
    Bałdyzer
    Level 12  
    It turns out that it is better to use some cheaper low calorie coal outside the heating season.
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Topic summary

The discussion revolves around the DEFRO Eko Duo Uni 25KW oven operating in summer mode, where the user experiences excessive boiler temperatures, often reaching 85 degrees despite a set limit of 45 degrees. Participants suggest that the issue may stem from the oversizing of the heating source and recommend using a special low-calorie coal blend during the summer. They also discuss the importance of adjusting the feeding time and interval to manage temperature effectively. A professional is scheduled to inspect the unit under warranty to address the overheating issue.
Summary generated by the language model.
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