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Immersion heater - economy 7 timer wiring

Former Community Member
Former Community Member
Hello,


I have a honeywell st6400c controller and an immersion heater. 

My heater has 2 switches, off and on peak. My concern is that the heating works only with both switches on. Even if its set to trigger at off peak time only, which it does, both switches light up and if I switch off the onpeak one, the heating stops even tho the offpeak is still lit (testing this at off peak hours ofc). Is this correct ? does this not use much more electricity? I was monitoring this and Im sure it goes against the "night" hours, but my worry is that it uses much more power than it should.

Thank you for your advice

Tom
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  • 0
    Blencathra:
    so what is the 80amp neutral for?

    Typiod:
    Blencathra:

    80amp neutral? are you an ex board man, I was with NORWEB, whats the other neutral for straight out of the cut out?


    Blencathra yes worked for SEB ( as an installation inspector, on the meter department for a few years) amongst other things. Are you talking about the small Neutral coming out of the head, if so that is going into the time switch, that is were the installation neutral is returning. The 25 mm neutral goes from the head into the meter then upto the phase block and from there is goes nowhere.




     




    The 80Amp neutral would be for the off peak load (ie storage heaters), like all old time clocks the live and neutral would pass through the timeswitch, however not always, sometimes the neutral from the off peak board would get wired straight into the head.


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  • 0
    Blencathra:
    so what is the 80amp neutral for?

    Typiod:
    Blencathra:

    80amp neutral? are you an ex board man, I was with NORWEB, whats the other neutral for straight out of the cut out?


    Blencathra yes worked for SEB ( as an installation inspector, on the meter department for a few years) amongst other things. Are you talking about the small Neutral coming out of the head, if so that is going into the time switch, that is were the installation neutral is returning. The 25 mm neutral goes from the head into the meter then upto the phase block and from there is goes nowhere.




     




    The 80Amp neutral would be for the off peak load (ie storage heaters), like all old time clocks the live and neutral would pass through the timeswitch, however not always, sometimes the neutral from the off peak board would get wired straight into the head.


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