CLEANING TRUMA BOILER WITH CITRIC ACID

Discussion in 'Top Tips & Tricks' started by cazian, Mar 23, 2016.

  1. cazian

    cazian Funster

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    I have purchased some food grade citric acid to clean my Truma boiler. Can anyone help with how much to put in per litre?
     
  2. GJH

    GJH Funster Life Member

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    There is some information Here about Truma's Aquastar 1 product which contains citric acid. It includes concentration advice.
     
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  3. John Laidler

    John Laidler Funster

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    Mine has a Webasto and they recommend vinegar at a ratio of 1:2 with water.

    The problem is you need quite a lot of vinegar so I'm going to see if I can buy some of the stuff chip shops pass of as vinegar as it should be cheaper in bulk. Chemically it will be the same - ascetic acid.
     
  4. Hils and Glenns

    Hils and Glenns Funster

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    I didn't know you cleaned the boiler. How often would you do this? I wonder if coca cola would do it.
     
  5. Portland

    Portland Funster

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    If you're brave enough try Aqua Fuerte (can't guarantee the spelling ) mercadona spain but not if their is any ferrous metals in the boiler. That stuff will clear most things
     
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  6. scotjimland

    scotjimland Funster Life Member

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    I'd be very wary of using anything other than products approved by Truma.. ie Citric acid or Truma Aqustar 1+2 ..

    Vinegar ..

    from Truma information

    Vinegar
    Vinegar is produced by fermenting alcoholic liquids with acetic acid bacteria (Mycoderma aceti). Vinegar is a descaling agent due to its acid content, but it leaves behind an unpleasant taste which adheres to plastics and rubber and is very difficult to remove. Vinegar is not suitable for descaling drinking water systems in mobile homes, as it attacks rubber seals and even some metals.

    https://www.truma.com/tr/tr/water-systems/pros-cons-products-cleaning-desinfection.php


     
    Last edited: Mar 23, 2016
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  7. scotjimland

    scotjimland Funster Life Member

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    had a Google and found this on an ebay seller of Citric Acid http://www.ebay.co.uk/itm/1kg-Citric-acid-food-grade-Top-quality-/140426902395

    Kettle descale
    Use 2 TBLs/liter. Boil it together.Rinse with fresh water.
    If you have aluminium parts use 1TBLs/litre.

    so for a 50lt tank = @ 1 TBLsp per litre = about 1.7kg of citic acid.... if correct, that's a lot of citric acid :eek:
    cost £14 ..

    Truma Aquastar 1+2 cost £20

    I'd go with Aquastar ,
     
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  8. dpsuk999

    dpsuk999 Funster

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    Can't seem to buy Aquastar anywhere though!
     
  9. scotjimland

    scotjimland Funster Life Member

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    Last edited: Mar 23, 2016
  10. maz

    maz Funster

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  11. dpsuk999

    dpsuk999 Funster

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    Can't seem to buy from caravan components website
     
  12. John Laidler

    John Laidler Funster

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    I'm not sure why it is necessary to fill the fresh water tank with the citric acid solution if the aim is just to descale the boiler. I bought 500g of citric acid from a home brew shop today and will dilute that with water. This should give enough to fill the boiler easily.

    I understand you would want to fill the water tank if sterilising it with aquastar 2 but not if just descaling.
     
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  13. scotjimland

    scotjimland Funster Life Member

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    quite correct .. why I said 50lt I don't know... must be getting senile.. o_O

    either that or it was a subliminal message from the Truma package .(that's my excuse anyway;))

    Truma boiler is only 10lt .. so 500gm citric acid is more than enough .. mix up with about 15lt to give enough to flush to the taps,
     
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  14. cazian

    cazian Funster

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    Thanks for all your helpfull advice, went with putting 20litres water and 20 tablespoons citric acid, and left it for 8 hours. As you can't see inside the boiler don't know if it has worked, but it worked in the kettle.
     
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  15. John Laidler

    John Laidler Funster

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    I found some advice issued by my MH manufacturer which said a 5% solution, specifically 1kg of citric acid in 20 litres of water left in for 24 hours.

    I didn't have that much so I made up about 12 litres of 4% this morning and that is currently stewing in the boiler heated to 70C.

    I also added the same mix to the kettle which was only lightly scaled but it had all been dissolved before it came up to the boil so I'm not planning to leave the mix in the boiler anything like 24 hours and will drain it this afternoon.
     
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  16. Jaws

    Jaws Funster Life Member

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    I aint looked or searched for info so 'scuse question..
    How on earth do you get it in the boiler ?
     
  17. pappajohn

    pappajohn Funster Life Member

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    Thank Jim.
    I need to descale the Alde wet heating system in my caravan as it had a leak and the previous owner only use tap water to top it up instead of an antifreeze/inhibitor/distilled water mix.
    The pipework is about 50% blocked with limescale so the boiler overheats before the room is at temperature.
    Vinegar is the fluid of choice but I need to research the corrosive effects of vinegar on aluminium as the whole system is aluminium.....your link simply says 'some metals'
     
    Last edited: Mar 26, 2016
  18. scotjimland

    scotjimland Funster Life Member

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    by pump from the fresh tank
     
  19. pappajohn

    pappajohn Funster Life Member

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    Remove the cold feed pipe and funnel it in.
     
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  20. John Laidler

    John Laidler Funster

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    I drained the fresh water tank and boiler. Then added the mixture to the fresh water tank using a watering can. Then turn on water pump and open taps until air is driven out. I collected the water coming out of the taps in a jug and returned it to the fresh water tank with the watering can as I only made up 12 litres and I was worried the tank would run dry.

    Flushing it all out afterwards was time consuming. I drained the boiler and fresh water tank, refilled it with fresh water and bled the system, drained and refilled again but the hot water still tasted a bit acidic. So I drained and refilled the boiler alone three more times and it now tastes OK.

    Note mine's a Webasto so it might be easier or harder to flush it all out with different makes.
     
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