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  • rustyfence
    replied
    Hi EA,

    Yes I had the same thought, but a bit of background will make things clearer.

    I've been running it on Pureau (near enough to completely impurity, mineral and chlorine free) with a touch of potassium bicarbonate to remineralise. No SA water. On this diet I feel there is no need for a filter, except to catch any inadvertent debris that might fall into the tank, which the plastic "silk-screen" does just fine at (there were a few tiny specks in there).

    However I am the second owner, and the first owner was using a benchtop Brita jug for water. As such I found traces of calc when I received the machine, including on the "cold"/inlet side, and thought I had got it all out - but I didn't find the clogged wire mesh filter.

    Unfortunately there is no spec for the wire filter, as it's not even on the parts diagram. But by eye the mesh is quite coarse, much coarser than the "silk screen" plastic filter. So all it did, I reckon, was provide a nucleation surface for the previous owner's calc. But if running plumbed it would be the only filter from the mains, so it would need to go back in for sure ... however in that case the mains pressure would help with the pump priming and mitigate the flow resistance that it creates.

    Hope that clears it up!

    Leave a comment:


  • Dimal
    commented on 's reply
    Great observation 'EA' and advice to go with it...

  • EspressoAdventurer
    replied
    Originally posted by rustyfence View Post
    Well kofekitt you were spot on, thank you!
    There was a clogged steel gauze filter hiding under the reducer at 28, and the pump is running beautfully quiet with it removed. The tank already has a plastic-mesh filter in-line, so there really is no need for that gauze filter unless running plumbed. Would be nice if ECM included that filter on their parts diagram -- it would have taken a long time for me to find it without kofekitt's tip. Amazing the knowledge-base we have on here.
    For anyone attempting this in the future, note that ECM use a thread sealant/locker to seal both of the reducer threads. So be prepared with some sealant or thread tape to reassemble.
    I s'pose I'm similar to counter cyclical investors......Ok So I'm an alternative type poster here.
    So just saying ........ RF...
    If as you say your using the tank atm and the tank has its own own inline filter...fine....by why then is the secondary inline filter - the gauze filter - at the pump still 'working' and restraining sediment / hardness like impurities?

    One answer may be that 'both' filters are of a different rating / grading. Filtration in a basic sense is given a rating of a certain size microns... (say 30 to pick a number) by, how much in a % term that filter will capture of the stated size impediment.
    i.e. will capture up to 90% of impurities at 30microns. As I understand it !

    I can only offer a response to whats posted..If the gauze is no longer there where do the impurities now go?
    I suggest the machine / filtration is sending you a signal.
    Filtration....S.A. Water !

    Be good to it...give it good clean espresso standards water via the appropriate filtration.
    It'll Lv you back over the coming decades !
    GL
    EA

    Leave a comment:


  • rustyfence
    replied
    Well kofekitt you were spot on, thank you!

    There was a clogged steel gauze filter hiding under the reducer at 28, and the pump is running beautfully quiet with it removed. The tank already has a plastic-mesh filter in-line, so there really is no need for that gauze filter unless running plumbed. Would be nice if ECM included that filter on their parts diagram -- it would have taken a long time for me to find it without kofekitt's tip. Amazing the knowledge-base we have on here.

    For anyone attempting this in the future, note that ECM use a thread sealant/locker to seal both of the reducer threads. So be prepared with some sealant or thread tape to reassemble.

    Click image for larger version

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  • Dimal
    commented on 's reply
    Hi Mal, that video is using the leva to start/stop. I should have mentioned I'm running from the tank and there was nothing in the group. That said, I also get the noise when using a blind filter.
    Ok, all good then. I just wanted to rule out the possibility that the Boiler Refill Solenoid could have been energising.

  • kofekitt
    replied
    Yes, the gauze is either on top of or under fitting 28, first you have to undo the braided hose at pump head, then at the fitting end where it joins onto 28 . then you may have to remove 28 and either clean or remove the gauze filter.

    Leave a comment:


  • rustyfence
    replied
    Hi Mal, that video is using the leva to start/stop. I should have mentioned I'm running from the tank and there was nothing in the group. That said, I also get the noise when using a blind filter.

    Thanks for the tip about the gauze filter kofekitt - though I can't see it mentioned on the parts diagram (below) - where should I be looking, at number 28? In my case the water is entering that 3-way fitting via the silicon tube from the tank (26)


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  • Dimal
    replied
    Is the Start/Stop sequence being initiated via the Group Leva or by switching the machine On/Off via the power switch or the GPO?

    Mal.

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  • kofekitt
    replied
    I've had similar sounds, but not exactly like that - first place to check would be the gauze filter in the 3 way plumb/tank fitting. Usually found under the braided hose where it feeds into the fitting . If it gets blocked with sediment, it can make the pump struggle to prime and give erratic stuttery performance . I usually just throw the gauze filter out, but they are available to buy

    Leave a comment:


  • rustyfence
    started a topic ECM Technika rotary pump

    ECM Technika rotary pump

    Calling all rotary pump experts!

    My ECM Technika started making some buzzy rattly sounds of late, during operation of the rotary pump -- both during extraction, and during boiler refill.

    I opened 'er up and checked for random loose parts and pipes that might be vibrating, but found nothing loose. Holding/damping components didn't help. I also checked and readjusted the pump bypass and the OPV for any looseness, but that didn't help either.

    During all the tinkering, the repeated stop/start operation of the pump seems to have helped to reduce the buzzing quite a lot. For now the buzzing has been reduced to just a fraction of a second during pump start, like this:

    https://imgur.com/a/FAG9Jvw

    So this is OK and I can live with it ... but I suspect the noise will worsen back to how it was.

    What is the collective snob wisdom please - dodgy pump, pump motor, or something elsewhere?

    Thanks!
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