ACS Vesuvius Evo Leva

DavecUK

bradliew I went the correct way now and tried this rotation multiple times. But its still with the same problem of the intermittent water coming out.

I tried to further rotate it the right way to increase the pressure the ¼ turns about 13 times (more than 3 full rotations now). And its the same issue with the pump. I just stopped for now as I’m worried if something might happen if i keep turning the screw to increase the pressure.

I did write clockwise and towards plus, because many stats are like that, on reflection I should have said towards plus. On the CEME stats I have here, the plus is anticlockwise, on other CEME (from past years or whatever) it might be in a different direction

Looking at my stats if you went clockwise you might have gone towards minus.

holy shit…3 turns is massive for those model stats.

So if you went 3 turns clockwise with the centre screw, towards - (minus), hopefully you just reduced tension on the diaphragm and broke nothing, but lowered the pressure at which it custs the pump making it worse? If you have not broken anything, then go 1 turn towards + (don’t’ force it) and then in ¼ turn increments until the pressure starts to rise

If god forbid you turned the “off centre screw” the hysteresis screw a lot of turns, you may have broken the stat.

https://files.cemegroup.com/pressostati/0/31/PN%20model.636054001565033940.pdf

P.S. I said ¼ turns because it’s incredibly sensitive.

bradliew

DavecUK Hi Dave, all adjustments in multiple small increments still have no change at all :(

Earlier today, ACS have diagnosed it as a pressure switch failure as all adjustments on the switch itself from the beginning has no fix and they recommend I just change the pressure switch.

Although they asked if I want the upgrade electronic version which is much pricier. I just wonder now if it would be more complicated/difficult to install and calibrate the manual pressure switch vs the electronic one.

But either way, i guess the root of the original problem was that the switch must have malfunctioned or broke somehow through wear and tear? No clue how it could have happened i guess.

Cuprajake

Showing the pressure and time system

Blackbirdman

Cuprajake do you ever use the manual function?

I’ve got one on order which will be shipped next week. Can’t wait!

Cuprajake

I have used both.

LMSC

bradliew Although they asked if I want the upgrade electronic version which is much pricier. I just wonder now if it would be more complicated/difficult to install and calibrate the manual pressure switch vs the electronic one.

I understand that the pressor sensor is expensive, may require a new control board (if yours’ is an older version of Evo like mine) and an adaptor. All these would make it a complicated upgrade. I think @pinky-and-me did an upgrade and he may tell you more about this upgrade.

As we wrote above, the expansion value (see my picture that I had posted along with the pressure stat) should not be tightly wound. It needs to be tight enough to hold the pressure. This will help improve the longevity of the pressure stat.

Cuprajake

How old is your Evo?

Cuprajake

Blackbirdman

Cuprajake Great video. Does the little lever to flush come as standard or did you make it yourself?

ciprianp

DavecUK

Sadly, life hasn’t allowed me to come back earlier. Thank you for your reply!

In this video, I purposefully choked the shot, to show the behavior with very fine grind.

I adjusted the off center screw, I can confirm this. I understand it was the wrong one to do?

Is this normal behavior for the pump? Thank you!

DavecUK

ciprianp Is this normal behavior for the pump? Thank you!

Yes, you can make it pulse a little less often by increasing the Hysteresis (the off centre screw), but I would suggest that it’s fine the way it is….and to leave it alone. if it starts pulsing to often to maintain pressure in the brew circuit when idle, than you can adjust the hysteresis a little. Only adjust a little, if you have to go too far then there might be a very small leak in the sealed brew circuit,..but a pulse now and then to maintain the pressure over time is absolutely normal.

I have a shower/bathroom pump for the loft extension that works on the same principle and occasionally pulses to maintain pressure when I am not drawing water.

ciprianp

DavecUK

I see. Thank you! I guess this will be part of my own relationship with the machine now 😊

Blackbirdman

Any tips/advice on a tamper (ideally self levelling) and a funnel?

I have one from Normcore now which I quite like but since I’m moving from a 58mm machine to the evo leva I need to buy new accessories.

I’m think about adapting the Normcore with a lathe but not sure if it will work out…

LMSC

Blackbirdman Any tips/advice on a tamper (ideally self levelling) and a funnel?

Bravo, 54.90 mm for Evo.

Cuprajake

Blackbirdman I did that. It works ok

Adrianmsmith

Blackbirdman
https://www.bluestarcoffee.eu/Mobile/en/Precision-Coffee-Tamper-544mm/m-m-5414.aspx
I recently purchase this one with ims baskets
Seems perfect.
Not sure why you would need self leveling it’s easy to eye it against the basket.

Blackbirdman

Cuprajake

Cuprajake will probably give it a go and see how it turns out. Will also check on the bravo one.

Thanks for the tips.

Blackbirdman

Adrianmsmith habit I guess and takes out one variable. But thanks for the tip! Will keep this one in mind.

Amberale

Blackbirdman

I have a “The Force” tamper and a Sworks funnel.

LMSC

I also have a Torr 54.4 mm tamper. It works well with stock baskets.

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