Just got a Lelit Bianca v3 and noticed that the group head pressure gage will slowly climb to 9 bars and then immediately go back down after. Is this normal cuz it seems like the shots are more watery near the end. Also I can't do any flow profiles because the pressure wont hold consistenly. The pump shows 10 bars and with a back flush disk in it hits 10 bars and stays there.
#Lelit Bianca Grouphead Pressure not holding
lyric jolt
ebon granite
It’s normal, the group bourdon gauge shows (not perfectly accurate but close enough) pressure inside the grouphead. Which is a function of input flow (related to pump pressure), puck resistance (essentially grind fineness, although not entirely), and output flow rate (how fast coffee ends up in your cup)
lyric jolt
How do I do flow profiling then when the recipes say hold at 9 bars for x seconds and drop to 6 bars for x seconds when my gauge wont hold and just goes up to 9 and back to 0
ebon granite
Grind finer.
Your puck isn’t resisting the pressure well enough
Or perhaps you’re grinding way too fine and you’re just snapping the puck clean in half. More detail on what your output looks/tastes like would be helpful.
lyric jolt
20 g in 45g out in 25-30 sec. Taste is close to balanced just slightly acidic. Texture is very thin and watery however
ebon granite
What’s the bean?
1:2.5 will tend towards a thinner body.
Oh no that’s 1:2.25. 😅
What profile are you aiming at? And why that profile?
lyric jolt
light roasted ethiopian i believe from a local roaster. I know it sounds weird but I'm fine with the output and taste I just wanted to do some flow profiling with pre infusions and low flow rate with the paddle. The gauge not changing at all makes it more difficult.
Following the recipe from the roaster tbh
but wanted to try londinium profile for fun lmao
ebon granite
You got a video of what’s going on? I mean ideally like 3 videos from different angles like group, scale, grouphead gauge. But I understand most people don’t have a home film studio (myself included 😅)
lyric jolt
ya i can pull a shot quick and send it
ebon granite
A video is so insanely helpful when discussing particular profiles on Bianca.
lyric jolt
Im just gonna pull one fully open so you can see the gauge drop
ebon granite
Pull whatever profile it is you want to discuss I guess.
Which grinder you running?
lyric jolt
Df64
Omg I’m an idiot I never checked the settings
It had low profile start and finish programmed in default somehow
ebon granite
Well now you know! 😅
lyric jolt
I never checked cuz I assumed it would be factory off
ebon granite
I have a v2 so that wouldn’t have been something I’d have thought of straight away either.
lyric jolt
Guess when they tested it before shipping they must have made sure that worked
So I was basically fighting the computer when I tried to do manual profiling
ebon granite
Which means you’re dialled in for an odd point.
lyric jolt
Ya gonna have to re dial in but that’s a much easier fix then replacing a gauge
Thank you for the help lmao
ebon granite
No worries any time.
#profiling is probably gonna be a massive help to you overall though.
lyric jolt
Ya I need to start reading more on that. Just watched a few YouTube videos so far
ebon granite
.profiling
west cryptBOT
ebon granite
^ Big help
spare pumice
"flat pressure" profiles really don't exist, unless you grind (too) fine