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Water cylinder slow to get to temperature

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  • 05-03-2024 1:50pm
    #1
    VidaLoca
    Registered Users Posts: 42 ✭


    Hi,

    My hot water cylinder is slow to get to temperature, it takes over an 1.5 hours to reach the 65'C on the thermostat. Is that normal ? Is there a way to get it faster ? Should the return valve be fully open or should it be backed off a bit ?


    Thanks



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    #2
    coylemj
    Registered Users Posts: 25,336 ✭✭✭✭coylemj


    Is it being heated by the electric element?

    You may have some constant draw on the hot water supply, check all of the hot taps in the house to see if you have a drip anywhere.



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    #3
    John.G
    Registered Users Posts: 3,466 ✭✭✭John.G


    https://www.boards.ie/discussion/2058339056/water-cylinder-slow-to-get-to-temperature

    Ideally, the return valve should be fully open for the fastest heat up time. The boiler flow temperature should be ~ 10C higher than the required HW temperature so in your case, a boiler temp of 75C and certainly not lower than 70C. Also depends on cylinder capacity, a fairly standard cylinder of say 115 litres might take 45 to 60 minutes depoending on the heating coil area. My cylinder takes 60 minutes to heat from cold at 10C to hot at 60C with a boiler flow temp of 70C, it has a fairly standard 0.65m2 heating coil, it will heat to 50C in around 40 minutes. There is no valve on the coil return.



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