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  • #16
    Re: Cool Touch steam wand

    Originally posted by Coffee Kid link=1157414445/0#14 date=1157628430
    Which model did you get?
    It is big..... but as I said, it looks really impressive (even my wife likes it )

    If you check my sig below it is the La Cimbali M20 2 group Dosatron....

    Kinda like the La Cimbali DT1 (but on steroids!!!)

    Has volumetric dosing (which can be programmed by the user) - nice - but I prefer manually stoping the flow.

    Auto boiler fill (needs to be connected direct to the water supply and drain) and of course a rotary pump

    Only about 80cm wide and weighs a tiny 70Kg or so :

    But its great ;D

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    • #17
      Re: Cool Touch steam wand

      Originally posted by Coffee Kid link=1157414445/0#14 date=1157628430
      Your using it for home?!?!? Probably to big for average people to have a machine that big on a kitchen bench
      Cimbali 2-groups make great home machines! ;D ;D

      Java "Pets his M-28 2-group" phile
      Toys! I must have new toys!!!

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      • #18
        Re: Cool Touch steam wand

        hey, would it be possible to change the pressure for steaming on the minore or even on any boilers?

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        • #19
          Re: Cool Touch steam wand

          Originally posted by Coffee Kid link=1157414445/15#17 date=1158139125
          hey, would it be possible to change the pressure for steaming on the minore or even on any boilers?
          Easily done via adjustment of pressurestat...but generally rarely required...A change of boiler pressure will have an impact on grouphead temperature....which may well not be desired...

          2mcm


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          • #20
            Re: Cool Touch steam wand

            Originally posted by Coffee Kid link=1157414445/15#17 date=1158139125
            hey, would it be possible to change the pressure for steaming on the minore or even on any boilers?
            Yep, on all HX machines the pressure in the boiler can be adjusted (they use a pressurestat rather than a thermostat)

            BUT :-/

            there is a direct link between pressure and the temp of the water in the boiler (mine runs 1.1 Bar which equates to a temp of 120 deg C)

            Now if I up the pressure - mine can go up to 1.8 bar - it will increase the water (and steam temp)..

            The water for the group is heated by a heat exchanger in the boiler (the quantity of heat transferred depends on the percentage of the heat exchanger in water and in steam within the boiler AND the temp of the boiler.....

            So increase boiler pressure = increase in boiler temp = increase in temp to the group head (and possibly burnt coffee) >..... this can be adjusted by "tuning" the process but is a complex proceedure. (reducing the temp of the boiler will likewise reduce the group temp)...

            So, yes it can be done (but unless you REALLY know what you are doing) I wouldnt!!!

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            • #21
              Re: Cool Touch steam wand

              So as to that if its a dual boiler or a single boler not HX you could change the steam pressure but not changing the grouphead tempreture

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              • #22
                Re: Cool Touch steam wand

                Originally posted by Coffee Kid link=1157414445/15#20 date=1158146183
                So as to that if its a dual boiler or a single boler not HX you could change the steam pressure but not changing the grouphead tempreture
                Well..... that depends!

                Some dual boilers use the steam boiler to pre-heat the water which passes into the brew boiler (this is the case with some prosumer dual boiler machines - dont know of any commercial ones that do this!)

                So with this type any changes in steam boiler temp affects the temp of the brew boiler (and the recovery time of the brew boiler).... Remember that prosumer machines have boilers 10% the size of mine..... and smaller heaters to boot (they have to run two boilers off 10 Amps where mine runs off a 25 Amp circuit for one boiler).... with these - changing steam boiler characteristics will have some effect on the brew boiler.

                The reason that the water to the brew boiler is preheated is to help that boiler get the volume of water to brew temp faster (because of the small element - all caused by the fact that these machines MUST plug into a 10 Amp outlet for consumer convenience.

                Some prosumer machines (and commercial machines) which have two totally seperate boilers would have no problem if you increased the steam boiler pressure.

                Out of interest, whilst purchasing my grean bean supply today, I checked out the latest commercial high volume 3 group.....

                It has a boiler per group - yep thats right 3 boilers for brewing - and I assume a large boiler for steaming,,,,,, ;D

                Requires at least a 30 amp supply (three phase recommended).....

                But still doesnt look half as good as my La Cimbali!!

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