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Seperate spurs for boiler and underfloor heating.

hertzal123
The customer asked for 2 spurs  in the boiler cupboard for the above.The uf heating engineer now wants to fire the combi boiler via voltage free contacts from his room stat and controls.

My thoughts are there should be 1 spur for both boiler and ufh.Or there could be signage to isolate both supplies before working .Any Thoughts?

                                                                                                                                                                                                                              Regards,Hz
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    There should be one SFCU supplying the boiler and generally the supply to all the other controls should be taken from the boiler.


    I have worked on central heating systems where some idiot has run in two supplies, including several where the boiler has had a plug and socket to connect it that had a live pin on the plug when it was removed from the socket, because it was being back fed.


    I actually went to one house a guy had just bought because the Building Society withheld part of the mortgage until various issues that the valuation surveyor had identified, the surveyor said repairs were required before an EICR was prepared to say it was now safe, as the electrical installation was potentially dangerous. One of the issues that resulted in the Building Society withholding part of the mortgage was that the surveyor had identified two supplies to the central heating system.


    Andy Betteridge
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  • 0
    There should be one SFCU supplying the boiler and generally the supply to all the other controls should be taken from the boiler.


    I have worked on central heating systems where some idiot has run in two supplies, including several where the boiler has had a plug and socket to connect it that had a live pin on the plug when it was removed from the socket, because it was being back fed.


    I actually went to one house a guy had just bought because the Building Society withheld part of the mortgage until various issues that the valuation surveyor had identified, the surveyor said repairs were required before an EICR was prepared to say it was now safe, as the electrical installation was potentially dangerous. One of the issues that resulted in the Building Society withholding part of the mortgage was that the surveyor had identified two supplies to the central heating system.


    Andy Betteridge
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