Iluvdabean Senior Member Joined: 7 Mar 2005 Posts: 1,314 Location: Kentucky Expertise: I love coffee
Espresso: La Nuova Era Cuadra/Gaggia... Grinder: Baratza Preciso/K-A Pro... Drip: Bonavita BV 1800 TH Roaster: Nesco 1010/Behmor 1600
Posted Sun Mar 24, 2013, 7:06am Subject: Re: Breville dual boiler pressure too low
Well so it sounds like scratch my PP idea. Dan you make me laugh with your comments,you have a good sense of humor.
I bought a BDB and had the same problem. I messed around with grind, tamp pressure, dose and God knows for about a month. My pressure maxed at about 7.5 bars, and grinding finer on my Vario eventually just choked the machine. My shots were all sour tasting too. Always.
Breville offered to exchange the machine. I suspect that this was one of the earlier machines that was shipped with a too tight OPV, and then recalibrated, but they overdid it on the down side.
I sucked it up and adjusted the OPV myself, using the advice in the youtube video. Being a klutz, it took me longer than 15 mins. DO NOT drop the nylon locking sleeve into the guts. Particularly do not drop it in a second time or your expletives will blister paint, necessitating repaint kitchen walls and therapy for any kids nearby.
Anyway, I got it adjusted. Now sweet 9 bars, 199 degrees, 4 second preinfusion, heavy tamp, coarser grind, 18.8 g dose, resulting in a 26-27 second 45ml shot of absolute loveliness. My heart sings with delight when tasting the chocolatey aromatic goodness, and then palpitates when I cannot resist the second shot.
Oh and BTW, I think letting the machine warm with PF in place for 20 -30 mins is a good idea. I still run a little hot water through the empty PF before fillling. I think it makes a diff.
Symbols: = New Posts since your last visit = No New Posts since last visit = Newest post
Forum Rules: No profanity, illegal acts or personal attacks will be tolerated in these discussion boards. No commercial posting of any nature will be tolerated; only private sales by private individuals, in the "Buy and Sell" forum. No SEO style postings will be tolerated. SEO related posts will result in immediate ban from CoffeeGeek. No cross posting allowed - do not post your topic to more than one forum, nor repost a topic to the same forum. Who Can Read The Forum? Anyone can read posts in these discussion boards. Who Can Post New Topics? Any registered CoffeeGeek member can post new topics. Who Can Post Replies? Any registered CoffeeGeek member can post replies. Can Photos be posted? Anyone can post photos in their new topics or replies. Who can change or delete posts? Any CoffeeGeek member can edit their own posts. Only moderators can delete posts. Probationary Period: If you are a new signup for CoffeeGeek, you cannot promote, endorse, criticise or otherwise post an unsolicited endorsement for any company, product or service in your first five postings.