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Thread: Giotto - pressure gauge query

  1. #1
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    Giotto - pressure gauge query

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    When I bought my Giotto, the pressure gauge stayed exactly at 1.1 bar, as stated in the manual.
    Lately, it has fluctuated between 1.1 and 1.2. If I take out the PF it goes down to 1.1 or thereabouts. I am sure that this is within normal limits, but it is something I should be concerned about? If so, what should I do? I would value the opinions of those in the know. The PFs are cleaned regualarly. I have never removed the shower screen, but dont think it is clogged as I regularly flush the machine. Thanks in advance!

  2. #2
    TC
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    Re: Giotto - pressure gauge query

    Its all absolutely normal- the pressurestat is doing what its designed to do....keeping the boiler pressure within a 0.1 bar zone...so worry not- your unit is working perfectly...

    Chris

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    Re: Giotto - pressure gauge query

    Yes and to add just a little more information that might be helpful for El Espressio & others:

    The steam pressure or boiler pressure gauge indicates only steam pressure in the boiler and nothing else. Removal of the group handle from the group, cleanliness of the group handle or state of the shower screen have no bearing whatsoever on boiler pressure. They are related to water pressure rather than steam pressure, and there is no water pressure gauge on said model.
    *
    So on the face of it as 2MC says...put it down to normal fluctuation. *

    Simply note however that the tiny pressurestat MICROSWITCHES used on semi-commercial machines are not a patch on the full sized pressurestats & switches used on full sized machines and do not have anywhere near the same service life expectancy. So it is not uncommon over time, to have a microswitch malfunction due to wear (or for that matter excessive exposure to steam/water vapour as when there is some other problem such as a leak happening somewhere), that would require it be replaced. In such a circumstance you would find the "set pressure" might fluctuate and this would be due to the tiny points in the switch becomming pitted / burned and either not making proper contact, OR fusing together.

    Youll know when the time comes because *the size of the fluctuations in set pressure will be much greater than what you have just seen, and the appropriate descriptive term in that case becames "malfunction" rather than "fluctuation".

    Regardz,
    FC.

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    Re: Giotto - pressure gauge query

    Behmor Brazen - $249 - Free Freight
    Quote Originally Posted by Fresh_Coffee link=1145659495/0#2 date=1145764333

    The steam pressure or boiler pressure gauge indicates only steam pressure in the boiler and nothing else. Removal of the group handle from the group, cleanliness of the group handle or state of the shower screen have no bearing whatsoever on boiler pressure. They are related to water pressure rather than steam pressure, and there is no water pressure gauge on said model.
    *FC.

    Thanks for your detailed response, FC. The reason that I mentioned the PF was that the gauge moves down immediately after I remove it. Obviously this should not happen as you say, but I did it about 10 times this afternoon and it happened each time - going from 1.2 to 1.1. It does not move if I tap it -so goodness knows whats going on there! I thought it might just be vibration or something knocking the indicator back. Anyway - unless I see large fluctuations Ill not worry about it. Thanks again.



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