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Problem with NS Oscar after descaling using Dezcal
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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, 12:10pm
Subject: Problem with NS Oscar after descaling using Dezcal
 

Hi all,

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?

Thanks,
Andre
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,477
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Fri Oct 22, 2010, 6:29am
Subject: Re: Problem with NS Oscar after descaling using Dezcal
 

It sounds like there is still descaling fluid in the system. Flush until the water coming from the group head tastes fresh, the same is true from the boiler.

 
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Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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jlhsupport
Senior Member


Joined: 22 Oct 2010
Posts: 85
Location: Lafayette, IN
Expertise: Professional

Posted Fri Oct 22, 2010, 6:59am
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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