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Bezzera two group B2000,information needed,please...one and all.

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  • #31
    Bezzera B2000 TE 2 group.

    Hello everyone and a happy new year for 2016,
    I'm back again,sorting out this Bezzera B2000 TE ,volumetric 2 group machine and I'm almost at the stage I can connect looms to a borrowed RL30 water level controller.
    I was hoping for some helpful advice regarding the three (indicated) female spade connectors,the controller hasn't any provision for these,they are marked (by some service person) as T1,T2 & T3.The wires are coloured as active (brown) neutral (blue) and earth (green /yellow).
    I thought they may have provided power to the two separate touch pads,that's where they connect to anyway (in parallel).
    I have confirmed operation (and identified correct cables) of pres -stat,rotary pump,contactor and all solenoid's and the heating elements were removed and checked as electrically Ok,no evidence of calcium build-up,also removed and cleaned up the two auto fill probes,ready for their action.
    Should anyone reading this have access to a identical (or similar) water level controller,I need another as I will have my single HX bezzera without one, after this exercise,thanks.
    Again ,thank you for your potentially helpful advise.
    Cheers,
    Mick.
    Click image for larger version

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    • #32
      Hi Mick, here's a possibility: if I remember correctly you have the key membranes, yes?

      If so, I believe the TE also had these harnesses to plug into the semi-auto version. They would need to be 230VAC. The membrane keys run off low power DC from the PCB. There might be a manual over ride rocker switch as well (like Boema and Expobar and others) that those three connectors plug into.

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      • #33
        Hello again,
        Just back into this machine again,now have one available RL30 water level controller which I intend using on the Bezzera.
        Just need to have confirmed the voltage of the TE membrane pads,receive their power via three grouped leads (coloured Brown ,Blue and Yellow/green (Earth)),question would this voltage supply be AC 240 volt or 24volt DC ?
        I suspect the membrane PCB's receive 240VAC and convert to 24 vDC for the push button pad controls.
        However,I don't see any means (transformer) for the power reduction,relays on each (x2)are marked as 23.7volts DC.
        I'm still trying to source a schematic for the electrical system to confirm this however,proving very elusive though.
        Image is of one of the membrane PCB assembly,any assistance required would be appreciated.
        Cheers,
        Mick.
        Click image for larger version

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        Last edited by mulquemi; 29 February 2016, 10:01 AM. Reason: grammer

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        • #34
          Hi Mulquemi

          just looking at the picture can you advise the capacitor rating? because if is is ~300VAC and 0.47uF or larger it may be a captivate power supply and there is not a transformer. And the second question becomes what size are the relays? Because it is possible to operate 2 ( very small) relays from a power supply like this.

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          • #35
            brettreaby,
            Thanks for you prompt reply,at work ATM so will confirm the above this evening.
            Cheers,
            Mick.

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            • #36
              Brettreaby,
              Another photo of the membrane printed circuit board ,can't see any capacitors electrolytic or otherwise of any reasonable size,I believe more confidently now that the board is powered directly and via the loom (240 volts) rather then from the water controller module,as I originally thought.
              Would you believe this to be the case,happy to connect it all up and carefully observe its proformance.
              Cheers,
              Mick.
              Click image for larger version

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              • #37
                Seems that there may be some components mounted from the back of the board too mate.
                Should probably check that out first before powering up...

                Mal.

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                • #38
                  Hi Mick, that's a Gicar p/n 400608 Bezzera PCB 240VAC s/p in on the left of the image. The other side sports the five actuators that the membrane will touch when pressed.

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                  • #39
                    ... handy clip-in relay. Wish the common fail relays were so easy to remove and replace on PCBs now.

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                    • #40
                      Hello again,
                      Some explanation to the photo.
                      Cheers,
                      Mick.
                      Click image for larger version

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                      • #41
                        the markings on the relay are not quite good enough to read..... can you get a clearer shot?

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                        • #42
                          Hello again,
                          See how I go tomorrow,bit late now,thanks again for the support.
                          cheers,
                          Mick.

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                          • #43
                            MZP A 002 48 10
                            10 A 250VAC contact
                            23.5VDC coil

                            Data https://www.gme.cz/img/cache/doc/634...atasheet-1.pdf

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                            • #44
                              2 of these relays would require. 60mA current at 24V. so it must have a transformer somewhere to supply the 1.3w

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                              • #45
                                Hello all,
                                Wonderful news,really thought 24 volts DC was the place to begin,see what progress from then,that's what the numbered spade bits were marked as 1,2 &3 prefixed with T (for transformer) meant.
                                I haven't touched things as yet,attending to domestic chores firstly!
                                Mind you,I might get things connected and find the control pads both dead yet!
                                Must think positively,again!
                                Thank you to brettreaby & Beanz.
                                Cheers,
                                Mick.
                                Last edited by mulquemi; 1 March 2016, 07:51 AM. Reason: opps wrong current!

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