I have what I believe to be a fully working Sime Super 90 plus boiler. It heats the CH and it heat the DHW fine (the diverter valve is working because when the CH is off, the hot water heats up).
BUT, if I open my main stop tap fully, the water pressure is such that the boiler can't cope - at best it makes the hot water tepid but it's only really marginally slightly warmer than freezing (especially at this time of year). My solution is to close the stop tap to lower the pressure - eventually I find a balance where the boiler can heat the hot water enough to make it too hot to hold you hand under.
So, what's my problem? Is my water pressure too high? Should the boiler restrict the water flow so it only passes what it can cope with? Is the boiler simply underpowered for the job?
Thanks,
Bob
BUT, if I open my main stop tap fully, the water pressure is such that the boiler can't cope - at best it makes the hot water tepid but it's only really marginally slightly warmer than freezing (especially at this time of year). My solution is to close the stop tap to lower the pressure - eventually I find a balance where the boiler can heat the hot water enough to make it too hot to hold you hand under.
So, what's my problem? Is my water pressure too high? Should the boiler restrict the water flow so it only passes what it can cope with? Is the boiler simply underpowered for the job?
Thanks,
Bob