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Discuss What type of immersion heater is this? in the Plumbing Forum area at UKPlumbersForums.co.uk.

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  1. jonnyp

    jonnyp New Member

    I'm having to use the rather old immersion heater for hot water as my DHW from the boiler has a leak.

    Can anyone tell me what type of immersion heater this is? see photo. I assume it's non-thermostatic but that it does have some kind of safety cut-out? Does that mean it will heat the water to 75degreesC!!!!

    All it says on the case is Redring and BS3456. imm heater.jpg
     
  2. Last Plumber

    Last Plumber Plumber GSR

    Can't see photo
     
  3. rpm

    rpm Trusted Plumber

    I can.
     
  4. rpm

    rpm Trusted Plumber

    I`m not sure you`re allowed to change that yourself (sorry to say).
     
  5. jonnyp

    jonnyp New Member

    Don't want to change it as it's just a temporary measure. Just want to make sure it's safe and won't overheat.
     
  6. Last Plumber

    Last Plumber Plumber GSR

    How Come you can see it and not me
     
  7. townfanjon

    townfanjon Trusted Plumber GSR

    I see a pic of an immersion heater with no stat anywhere lol
     
    • Like Like x 2
  8. rpm

    rpm Trusted Plumber

    You using a tablet or phone? I`m on a laptop.
     
  9. Last Plumber

    Last Plumber Plumber GSR

    Laptop
     
  10. Last Plumber

    Last Plumber Plumber GSR

    TBH there are a lot of photos I cannot open.
    A lot say I don't have permission.
     
  11. townfanjon

    townfanjon Trusted Plumber GSR

    You wouldnt like to look at RPM's photos anyway , thank yourself lucky
     
    • Like Like x 2
  12. rpm

    rpm Trusted Plumber

    Well the door is wide open for a wisecrack,
    But being nice, I don`t know mate.
     
    • Like Like x 1
  13. rpm

    rpm Trusted Plumber

    Oi! Behave or I`ll send you some real nasty one`s via a PM. :90:
     
    • Like Like x 1
  14. rpm

    rpm Trusted Plumber

    Somebody else had this problem a few weeks back, don`t know the answer sorry.
     
    • Like Like x 1
  15. snowhead

    snowhead Well-Known Member

    Back on topic.

    That's not a safety stat that's the control stat.

    It's either fixed temp or the adjustment is on the side where it's pushed into the pocket.
     
    Last edited: Jan 10, 2017
  16. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    not safe to use
     
    • Like Like x 1
  17. jonnyp

    jonnyp New Member

  18. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    no safety limit non resettable thermostat
     
  19. jonnyp

    jonnyp New Member

    OK. Thanks. Presumably if its got a thermostat then that will switch off at preset temp eg 75°? I only want to use it for a few days and was planning on setting the timer for only 2 lots of half hour but curious as to what sort of temp (if any) it would switch off at.
     
  20. townfanjon

    townfanjon Trusted Plumber GSR

    Sorry I cant see the pic , but the cylinder should not be set above 60 ( through a control thermostat ) a thermal store can go higher . It MUST also have a highlimit thermostat that operates if the control stat fails , and they do .
    Some , high and control stats are combined as one
     
  21. chris watkins

    chris watkins Plumber

    Until you are sure that it has a thermostat providing temperature control DO NOT USE the immersion heater that looks like a standard copper cylinder, if the water boils you will know all about it and it could very well kill you or yours !!!
     
    Last edited: Jan 10, 2017
  22. jonnyp

    jonnyp New Member

    Thanks for taking the time to comment. Have tried to attach photo again as u need to see it really.
     

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  23. chris watkins

    chris watkins Plumber

    What is the immersion installed in ?

    As there is no thermostat pocket in that element head where is the stat located?
     
  24. jonnyp

    jonnyp New Member

    Its in a DHW copper cylinder and has been there since the house was built in 1970s. Its a big estate and I guess all the houses will have had the same. I'm only using it as an emergency for a few days til my c/h pump is fixed.

    I realise it doesn't have an adjustable thermostat but curious to know if it has a safety cut off or fixed stat given its age and BS3456. From the photo it looks as tho the live passes thro some kind of terminal before going to the element so I'm assuming that it has some kind of fixed stat (75oC?) or safety cut off (95oC?)
     
  25. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    No stat I think
     
  26. chris watkins

    chris watkins Plumber

    I would not assume anything to me it still sounds like it does not have temperature control, let along a high limit cut out. The wiring looks like the stat connection has simple been bypassed.

    You are taking a great risk even if you are only using it as a temporary heat source.
     
    • Like Like x 1
  27. jonnyp

    jonnyp New Member

    But what about safety cut off?
     
  28. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    There isn't one I think
     
    • Like Like x 1
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