ACS Vesuvius Evo Leva

LMSC

Systemic Evo will tame the most acidic beans, e.g. Kenyan and not produce mouth puckering espresso.

This is very true! I am really enjoying Crown and Canvas’s Washed Kenyan Mwiria AA. Sweet and gentle acidity as in Nectarine and Plums! I do pull the shot at 92/98 though.

Cuprajake

i tend to stay at 92/98 for most of my stuff, the med/dark i drop to 90/96

LMSC

Cuprajake the med/dark i drop to 90/96

+1.

Anything above 92/98, I find the cup a little unpleasant, unless it is really light.

Are you grinding on MM for the light and medium light?

LMSC

dutchy101 Evo

With the Evo as that’s what we have, I am afraid. I think the basket and 10.5-11 bars pressure make a difference. It shouldn’t prevent you from experimenting on your machine, though! Try and see what works for you. 😊

dutchy101

Cheers LMSC

Cuprajake

LMSC

yeah flat burrs for light - fruity

conical for nutty/choc

drdre89

Cuprajake

Conical for me then.

Everyone still alive so far? Good.

Cuprajake

Unica Costa Rica

Cuprajake

@Amberale cant load a pic over on hb, this is the lip

Amberale

Cuprajake
Thanks Mate.
I reckon there is enough meat there, looking at my 58mm Force.
It would be pretty expensive to turn the whole thing down from a new piece of billet stock but even cutting up a large SS "washer’ to weld on and then turn down might work.

Looking at your video, it really shouldn’t need much of a recess to sit nicely on the basket lip especially if it is machined to match the profile.
I’ll have to wait until I have the stock basket and maybe the IMS? before I decide which one I like.
I’ll keep you in the loop.

deiadri

Hey fellows,

my Evo is killing me a little bit lately. After powering up, every few seconds there is a clicking of a relays and the pump goes on to fill the boiler for < 0.5 seconds. This all happens without me doing anything at the group. Today this happened:

Can anybody point me in the right direction?

Another thing I’ve noticed is, that the preinfusion does not stop at 2 bars anymore. It goes to above 1.5 bar straight, then starts pulsing as usual, but then goes up and up, until it reaches 6 bars. This looks to be like the feedback mechanism is biased or broken in some way.

I’m a bit sad, since the machine is not even a year old and I already have two problems with it.

Best wishes

Adrian

DavecUK

deiadri Hi Adrian looks like the pump is running without the lever being pulled down (against a closed valve)? Then when you pull the lever, of course the group valve opens and the pump speeds up.

This leads me to believe you have a faulty pressurestat.

Which would probably be the reason for the “other” problem where the preinfusion pressure climbs too high.

I’ll grab a pressurestat from the spares box at the factory and bring it back with me on my flight tomorrow.

Send me an email with your address.

P.S. can you also send details of the problem to Maria at ACS and let her know I have taken a pressurestat for an Evo to bring back and post to you.

DavecUK

deiadri Oh, I made the assumption you’re in the UK? I can’t post abroad ACS will have to do that for you.

Cuprajake

UMM,

few bogo questions,

what water do you use, has it been descaled recently, clicking of solenoids can be crud sat in them

deiadri

Cuprajake

I used filtered water or water with a custom recipe. However I opened the machine up today and found scale on the underside of the serviceboiler, as well as rust on the grill on the underside of the Evo. It just keeps on getting worse I guess. I’m currently descaling to see if this helps.

dfk41

Thanks for the suggestion. I looked after it, but this was not the case.

DavecUK

Thanks so much for the effort! I’m based in Germany and will get in contact with ACS.

dfk41

Have you checked the pipe in the water reservoir that takes the water into the system? I found on mine that the constant lifting of the black plastic lid was stopping the pipe from being deep enough to be covered with water. Some folks tie a stainless steel nut to the pipe to try and counteract this

Cuprajake

If you have scale then that may be the issue, or it had a small leak under the boiler and the drip has caused a dust spot.

All machines can get it.

What is your water, after the descale maybe change it up

deiadri

For sure going back to my custom water recipe which I used to use in the beginning. Just went on a nightly walk to the supermarket and bought 10 liters of distilled water.

So I did the following:

I read some posts ago that the frequent activation of the pump can be due to pressure getting lost from the brew circuit. I switched off the service boiler and the pump activations just continued, so I guess this could be the case.
Also read that adjusting the pressurestat helped somebody to fix this problem. I turned the screw ¼ turn clockwise and the frequency dropped to about 4-5 minutes. However preinfusion was still around 4 bars. I then choked the machine with a shot and adjusted the pressure downwards until I hit 2 bars again. I’ve been waiting for 15 minutes now and no pump activation until now. Very nice.

I will finish the descaling and and then reseal every Seal and screw I see scale on from the outside.

While doing all this I noticed that a drop comes from the shower screen every few seconds, so I guess the group needs now seals. Can somebody give me a link where I can buy the fitting ones?

Thanks to everybody already

dfk41

deiadri Does the water drip from the group all of the time or just when going through the heating up process? It is quite normal apparently to drip when heating up (someone did explain why but I have forgotten). Every now and again, mine goes through a period where it drips for an hour or so when warm then stops

DavecUK

deiadri Group has an open chamber, so what dfk says is completely correct. It can also happen after a shot for a while.

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