JahLaza would you advise to reduce it a bar or so in my case?
Try it, it’s very easy. Only your taste buds will tell. 😊
Lelit Elizabeth pressure spiking/inconsistent
Thanks for running the experiment, @MediumRoastSteam ! Glad yours is working normally.
I tried the experiment with the blind basket initially full of water, and the behavior was still there with no notable change except for attaining pressure sooner, as expected.
I have opened a ticket both with my reseller and Lelit directly, to see if they can assist. But in the meantime, if anyone else has any theories I’d love to hear them.
Pygmalion out of curiosity, what water do you guys feed your machine with?
Reduced it to 9.5bar with blind filter (yes it was a very easy action!) just pulled a shot, it still went up to 10.5 bar at start of shot but maintained about 9.5 bar from about 13 secs. Tastes great, not sure if there’s a difference, fuller body I think maybe. Apologies if I’ve slightly diverged from the thread topic folks, interesting all the same🤔
Pygmalion I think I have the same issue as yourself. When I run first cycle with blind basket it hits 11 bar before slowly falling down towards 9.
Subsequent cycles go straight to 9 and hold. I tried filling the basket with cold water and that one goes straight to 9 bar and holds there.
I will pay attention to tomorrow mornings shots to see what is happening with coffee in the basket. I never look at the needle - watch start of shot then fill my milk jug whilst it’s pouring.
Niche Zero
Niche Zero
@MediumRoastSteam I use self-made remineralized water. It is 70/30 water: distilled water with a tiny bit of baking soda and Epsom salts added according to the recipe here:
https://s3-ap-southeast-2.amazonaws.com/hosted.fivesenses.com.au/hosted_docs/water_recipe.pdf
Interesting results, @Ando . It seems like your behaves normally when the blind basket initially contains water, though, while mine didn’t behave any differently in that scenario.
Pygmalion If I leave my machine for a while, fill blind basket with cold water - it overshoots to between 10 - 11 and slowly drops from there.
Everything following this first one goes straight to 9 and stays there.
If this is normal then grand. But it does seem very similar to what your videos were showing
Niche Zero
Niche Zero
Ah, I see @Ando - I misunderstood. Sounds like yours is behaving similar to mine then.
I also am ok with all this if it is normal and isn’t affecting the coffee. But, it doesn’t sound like it is especially normal, given that at least @MediumRoastSteam’s machine doesn’t seem to do this. I also worry that, since it definitely does this for me with coffee too, my initial shot of the day will end up being significantly different than subsequent shots, given that it will be at notably higher pressure than the others. Also, if it is indicative of some sort of flaw in the machine, then that just means a potentially more likely failure down the road, which I’d like to fix now while under warranty.
Curiosity got the better of me and turned machine back on to pull couple of shots with coffee.
First one touches 10.5 bar when machine ramps up (no PI) and is just under 9 at the end of the shot.
Second shot made straight after only goes to 9 before beginning to drop down to 8 by end of shot. This was 2 secs slower than first one.
So consistent with what was happening with blind basket tests.
Something to be concerned about?
I do struggle to dial in a lot of the time and get consistent shots that take same time etc.. I always just put it down to my inexperience or some other reason however …
Niche Zero
Niche Zero
After reducing opv to give 9.5 bar in blind basket yesterday, I pulled first shot this morning, it went up just past 11 bar and then back to 9.5/10 bar during shot. I adjusted the opv again to give 9.5 bar using blind basket. Pulled a shot of coffee it shot to 10 bar then finished out around 9/just over 9 bar. Could it be these OPVs loose their adjustment? I’m no authority on them but looks like something like that maybe in this case? Not hugely upset the coffee is great but as others have stated if there’s a defect/sign of defect it’s still in warranty!
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JahLaza When the machine is cold and unplugged. Take pipe off expansion valve, and split expansion valve by undoing it as if you are lowering the pressure… note how many turns. Don’t remove the expansion valve from the machine.
Remove bits inside in order….so you know how they go back. Then photograph (best quality you can), post photo here. Photo both sides of the pad bit.
If it’s a bit like this photo, lubricate the metal part of the disk with the rubber pad, and of course the top o ring before replacement, tighten up the same number of turns, then check the pressure.
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Should get to it later today what lube would you suggest (I don’t have any molycoate or similar I can pick something up today)?
Plumbers silicone grease…as this is only a test, one I can’t actually do. Molykote 111 would be the ideal.
Ok,opened, got end piece off and spring, doesn’t really look possible to get at the rest of the valve without either removing or something else. What do you suggest?
Got the flange piece out looks calcified to be honest
JahLaza Decalcify and lubricate it young man, get it nice and clean!
Then see how she goes.
Yep did that, she’s on the way back down from heat up now then will blind basket to adjust and then pull a shot. Only worry is I may need to take apart again if the fl^^^^ (forum didn’t allow this word last time!) didn’t sit in correctly. I’ve only used osmio zero in this machine by the way…