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  • ECM Giotto - Cant adjust brew pressure

    Hoping for some advice with my Giotto. I just got a hold of Gregs pressure gauge and have discovered, as I suspected, my brew pressure is way too high (around 11bar).

    I adjusted the OPV several times and the gauge indicated a drop in boiler pressure each time. However when I tried the gauge, the brew pressure remained at 11bar.

    I followed Gregs instructions for using his gauge very carefully and am confident there is no error there.

    Any ideas whats wrong with my machine?

  • #2
    Re: ECM Giotto - Cant adjust brew pressure

    Originally posted by 2322283B25203A490 link=1269596662/0#0 date=1269596662
    Hoping for some advice with my Giotto.  I just got a hold of Gregs pressure gauge and have discovered, as I suspected, my brew pressure is way too high (around 11bar).

    I adjusted the OPV several times and the gauge indicated a drop in boiler pressure each time.  However when I tried the gauge, the brew pressure remained at 11bar.  

    I followed Gregs instructions for using his gauge very carefully and am confident there is no error there.

    Any ideas whats wrong with my machine?

    hmm....sounds like it could be all scaled up and jammed :-?

    Comment


    • #3
      Re: ECM Giotto - Cant adjust brew pressure

      Was up til 4am last night poking around. Machine seemed in good condition with only minor scale, which is what I expected (or at least hoped for).

      One thing I did find was a gasket (see red dot in photo) which has eroded away considerably. Looking at the diagram (borrowed from Coffee Parts website) it looks like this could affect flow of water to the group. Any chance this $3 part could be causing my high pressure issue?



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      • #4
        Re: ECM Giotto - Cant adjust brew pressure

        Would suggest a replacement would be a good start.

        4am and posting already

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        • #5
          Re: ECM Giotto - Cant adjust brew pressure

          Yep the wife and kid are away so thought Id get a sleep in for once in my life. The cat and dog had other ideas...

          Comment


          • #6
            Re: ECM Giotto - Cant adjust brew pressure

            Originally posted by 5253594A54514B380 link=1269596662/0#0 date=1269596662
            I adjusted the OPV several times and the gauge indicated a drop in boiler pressure each time

            ???

            I dont get it, how does adjusting the OPV affect boiler pressure??? are you adjusting the right thing? the pressustat will adjust boiler pressure, not the opv.

            Originally posted by 5253594A54514B380 link=1269596662/2#2 date=1269642373
            Any chance this $3 part could be causing my high pressure issue?
            the pressure is caused by the pump. the opv is after the pump, but before the group. If the pressure is too high, your opv needs adjusting, not somthing in the grouphead. this is not your problem.

            Comment


            • #7
              Re: ECM Giotto - Cant adjust brew pressure

              Just a thought and some perhaps timely advice:

              If youre not sure what you are doing, its not the right job for you :-?

              Suggest you take your machine to a service agent before something goes or even worse, you go bang....

              Comment


              • #8
                Re: ECM Giotto - Cant adjust brew pressure

                Originally posted by 3E61796F646F636A6A6969616D620C0 link=1269596662/6#6 date=1269650447
                Just a thought and some perhaps timely advice:

                If youre not sure what you are doing, its not the right job for you :-?

                Suggest you take your machine to a service agent before something goes or even worse, you go bang....
                So true!

                Its all very well to test with a pressure gauge or Scace. These will help you diagnose a problem, but for a remedy, you really need to understand the mechanics of a particular machine before making adjustments. A tweak in one area may, and will often, necessitate a tweak in another area.

                Comment


                • #9
                  Re: ECM Giotto - Cant adjust brew pressure

                  Originally posted by 3A3F33373F306F5E0 link=1269596662/5#5 date=1269649993
                  Originally posted by 5253594A54514B380 link=1269596662/0#0 date=1269596662
                  I adjusted the OPV several times and the gauge indicated a drop in boiler pressure each time
                  ???
                  I dont get it, how does adjusting the OPV affect boiler pressure???  are you adjusting the right thing?  the pressustat will adjust boiler pressure, not the opv.
                  Sorry meant to say pressurestat ........ not enough sleep.

                  I agree with the advice given and have already been to Coffee Craft earlier today.

                  Comment


                  • #10
                    Re: ECM Giotto - Cant adjust brew pressure

                    Update - I did more reading (after some more sleep) and actually looked at how the darn thing is put together. Actually beginning to understand how it all works now.

                    Despite the wise advice given by very experienced contributors above, I am a stubborn greek male and couldnt help myself.

                    Adjusted the OPV - brew pressure now spot on 9bar. Result in the cup is a big improvement which is what I was after.

                    I would not recommend to other people as inexperienced as myself to tinker around the internals of a machine......and dont assume everything you read on the internet is going to be accurate.

                    Comment


                    • #11
                      Re: ECM Giotto - Cant adjust brew pressure

                      Originally posted by 7C7D77647A7F65160 link=1269596662/9#9 date=1269667512
                      stubborn greek male
                      Tautology.

                      Comment


                      • #12
                        Re: ECM Giotto - Cant adjust brew pressure

                        Originally posted by 5F637E656F6E796C646F0B0 link=1269596662/10#10 date=1269670348
                        Originally posted by 7C7D77647A7F65160 link=1269596662/9#9 date=1269667512
                        stubborn greek male
                        Tautology.
                        Oxymoron
                        ;D ;D ;D

                        Comment

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