Truma Combi (E) CP plus - hot water

Discussion in 'Heating and Air-Conditioning' started by Fletton, Sep 23, 2016.

  1. Fletton

    Fletton Funster

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    I've come to notice the following...

    Combi on GAS... No EHU... no heating on.

    Heating water from "cool/cold"

    If I set water to 60 deg... Water gets hot... and if I use some... It will re-heat and remain hot... until I turn it off at the panel..

    However, If I set boiler to 40 deg. Water gets hot... BUT... if I run some off... It doesn't appear to re-heat to maintain the 40 deg temp!...

    An example would be...
    This morning I set water to 40... When temp gauge stopped flashing ( indicating water at temp)... I drew some off for washing breakfast pots...

    Water heater left on at control panel...

    Then at 3pm (temp guage in steady state i.e not flashing) I drew a little from the hot tap in bathroom to shave.. Only a couple of cupfulls - it felt like was starting to get warm; I don't let tap run until hot... I take it as it comes for shaving..

    Then I get in shower and water is just barely warm - even with tap turned to full hot!..

    If on 60 ... I always have to mix with cold because it's chuffin hot!!..

    I'm wondering if there is some sort of thermostat in there that is "playing-up" when on 40 deg setting!...

    Do any of you folk have any clues as to why this would be!... or any experiences like this?


    John T
     
  2. Kool Kroozer

    Kool Kroozer Funster

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    This thing has been bought up before regarding the cp plus, what your describing sounds normal, we have the same system as you and many others do too, however i have not noticed ours not reheating the water when set on 40...not saying ours does i just have not noticed..truma i believe now decided to call the 40 a eco option, its very rare we use the 40 now as it doesnt heat much water but on 60 its scorching and you get a fair bit of it too..so what your explaining sounds pretty normal
     
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  3. Fletton

    Fletton Funster

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    Sounds a tad "illogical" not maintaining temp!?
    Surely the thermostat would/should kick back in?... It can't be - heat once then forget!.. Eco or not... There must be a point (temp) when the "gubbins" says ... Time to heat or re-heat the water!.. :/

    Unless you have to turn off and back on in order to "reset" it.... Mmm!..
     
  4. Speve

    Speve Funster

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    image.jpeg Here's a photo of instruction page for ours
     
  5. Speve

    Speve Funster

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    From how I understand it the electric mode will not work off EHU.
     
  6. Fletton

    Fletton Funster

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    Will attempt to read "when the light is better"... Ha! :)
     
  7. Lenny HB

    Lenny HB Funster

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    When set to 40 deg once up to temp thermostat does not cut back in until water drops below 27 deg. Bleeding useless, on the old 6002 combi you could both get a shower when set to 40, not any more.
     
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  8. Speve

    Speve Funster

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    Sorry it's not a good picture will try and do a better one for you.
     
  9. Fletton

    Fletton Funster

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    Yes that would make sense... Insofar as not running from 12v hab stuff.. And wanting 240v...
    But i'm not on EHU.. Have it set to gas only...
     
  10. Fletton

    Fletton Funster

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    Aah!.. So that'll be why water "seemed" ferkin cold today then...

    Water 29... Body 32... :)
     
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  11. Speve

    Speve Funster

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    When on gas only it selects lowest setting automatically.
    image.jpeg
     
  12. Techno

    Techno Funster Life Member

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    All I can say is it's a bit tatties tonight so sod t gas consumption by eck
    Fire it up Scottie
    IMG_9380.JPG
     
  13. Fletton

    Fletton Funster

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    Puff... :D I'm still sat ere int shorts n' t-shirt... :)
     
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  14. Lenny HB

    Lenny HB Funster

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    Same here a bit cooler tonight now 9:40 and dropped to 18 deg. Strange a few hundred miles further south and its colder got used to evenings at 28 deg in Germany expected Croatia to be warmer only got up to 24 today in Germany last week it was 32-34 not keen on this cold weather.
     
  15. Techno

    Techno Funster Life Member

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    It's on 36 now having overcome hysteresis (y)
     
  16. Fletton

    Fletton Funster

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    image.jpeg
    Not quite in high 20's ... But ... I'm a rock ard northish laddo... @movan - other thread... Haha!.. Ooh-err!..
     
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