Lelit Bianca User Experience - Page 62

Need help with equipment usage or want to share your latest discovery?
User avatar
slybarman

#611: Post by slybarman » Oct 12, 2019, 5:53 pm

PeteB wrote:I'm trying to figure how you get a higher reading with the paddle closed that when fully open. Am I understanding you correctly?

I assume you are taking these readings with a blind filter-basket?
I wasn't able to make heads or tails of that either.

User avatar
slybarman

#612: Post by slybarman » Oct 12, 2019, 5:54 pm

PeteB wrote:I did the same... turned down the max pressure. But then found that if I ran a slow preinfusion with the paddle at around the 7 o'clock position waiting for the pressure to build to around 2 bar before opening the paddle fully, I was then only able to obtain a maximum of around 8 bar and then falling away for most of the rest of the shot. I haven't worked out whether or not that is important or not yet as I'm still juggling with a number of variables. Temperature being one. It looks like I' settling on an offset of around 12ºC up from the factory 10º for my machine.
What's that expression - all engineering is a compromise?

User avatar
Misiak

#613: Post by Misiak » Oct 13, 2019, 3:13 am

PeteB wrote:I'm trying to figure how you get a higher reading with the paddle closed that when fully open. Am I understanding you correctly?

I assume you are taking these readings with a blind filter-basket?
Well, are we talking about the pump pressure right ? With blind filter it is similar but there is some ramp up time. If I start brewing the pressure is exactly 10 bars for couple of seconds. Once the basket is full with water the pump pressure will raise up to 10.5 bars. Not a big deal just interesting, seems that if there is a bigger resistance the pump pressure reads higher.

Also the grouphead pressure is different from pump pressure. I have noticed during brewing this raises up up to 11 - 12 bars so it is 1 - 1.5 bar more that the set pump pressure so people should consider this during brewing. Probably because of this reason it would make sense to set pump pressure to 9 bar instead of 10 because the pressure in grouphead is higher.
Lelit Bianca PL162T - Lelit William PL72

User avatar
PeteB

#614: Post by PeteB » Oct 13, 2019, 4:03 am

For anybody who has an Eric's thermometer or similar lying around and is considering removing the Bianca's manometer to fit the thermometer to check group-head shot temperature, I can suggest not to bother.

I tackled the idea today only to find there is no way to remove the portion that threads into the group-head onto which the manometer is attached without a special tool. Ah well, curiosity with the idea satisfied....
PeteB