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Oil Boiler Isolation Switch.

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Evenin' All,


Regarding an external ground sited domestic oil fired boiler for heating and hot water that has an internal switched fused connection unit nearby inside the house, what regulations will require an external electrical isolator adjacent to the oil boiler? You know the sort of thing, a double pole rotary isolator. 


Z.


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    Zoomup:




    Chris Pearson:




    Sparkingchip:

    The cost of having a boiler cycling 24/7 to keep stored hot water or the boiler itself up to temperature is very significant and wasteful.




    I cannot believe that this thread is still going. ?


    So why do that? Our boiler comes on bright and early so that we have hot water for showering first thing. It gives a boost at lunchtime so that we can wash dishes, etc. Then it comes on again in the evening, once again for food prep and washing up, followed by bathing. Is this unusual?



    Do you have other thermostatically controlled appliances like fridges and freezers on time switches as well Chris?



    Eh? ?


    Ideally, we would have a much better lagged HW cylinder, but it does slowly lose heat. To keep it hot all the time would be wasteful as Sparkingchip says. To keep the boiler on constantly would risk short-cycling. i.e. thermostat closes, boiler has to get up to heat, HW tank is heated, thermostat closes and now the heat in the boiler goes to waste. (The HW tank is adjacent to the boiler, so negligible losses in the pipes.)

Reply
  • 0

    Zoomup:




    Chris Pearson:




    Sparkingchip:

    The cost of having a boiler cycling 24/7 to keep stored hot water or the boiler itself up to temperature is very significant and wasteful.




    I cannot believe that this thread is still going. ?


    So why do that? Our boiler comes on bright and early so that we have hot water for showering first thing. It gives a boost at lunchtime so that we can wash dishes, etc. Then it comes on again in the evening, once again for food prep and washing up, followed by bathing. Is this unusual?



    Do you have other thermostatically controlled appliances like fridges and freezers on time switches as well Chris?



    Eh? ?


    Ideally, we would have a much better lagged HW cylinder, but it does slowly lose heat. To keep it hot all the time would be wasteful as Sparkingchip says. To keep the boiler on constantly would risk short-cycling. i.e. thermostat closes, boiler has to get up to heat, HW tank is heated, thermostat closes and now the heat in the boiler goes to waste. (The HW tank is adjacent to the boiler, so negligible losses in the pipes.)

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