drec Senior Member Joined: 29 Jan 2009 Posts: 11 Location: Toronto, Canada Expertise: I love coffee
Espresso: Nuova Simonelli Oscar Grinder: Mazzer Mini Roaster: Heatgun!
Posted Thu Oct 21, 2010, 11:10am Subject: Problem with NS Oscar after descaling using Dezcal
A problem with my NS Oscar:
I used two sachets of Urnex Dezcal for descaling, as per Dezcal instructions of 1 sachet/L; I then drained by opening up the steam wand, turning off the machine, and tipping the Oscar over the sink. Repeated this until the tank was empty, and flushed with two tanks of water. I did NOT drain any water through the grouphead.
Now, my espresso from two different roasts tastes extremely sour. Crema is also less pronounced. I can only surmise that I did something wrong in the descaling process, as I A/B'd with two different roasts on similar equipment. And the only roast before I descaled tasted just fine.
Please help! As well, would taking citric acid to the machine remedy things? If so, what volume?
jlhsupport Senior Member Joined: 22 Oct 2010 Posts: 85 Location: Lafayette, IN Expertise: Professional
Posted Fri Oct 22, 2010, 5:59am Subject: Re: Problem with NS Oscar after descaling using Dezcal
Quick question: How did you introduce the dezcal solution to the boiler? Did you remove the steam pipe and use a funnel? Or did you try emptying the boiler first by tipping out the steam wand and then using the autofill to pull solution from the tank?
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