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Problem with my Vibiemme Domobar Junior overheating
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Moreece
Senior Member


Joined: 17 Nov 2012
Posts: 1
Location: Amsterdam
Expertise: Just starting

Posted Sat Nov 17, 2012, 6:48am
Subject: Problem with my Vibiemme Domobar Junior overheating
 

Hi everyone I just got my Domobar Junior and been experimenting en making coffee with this wonderful machine.
I have been having a problem: If the machine is on for a couple of hours when I attempt a cooling flush only steam/boiling water comes out of the grouphead.
Even after 30 seconds the water is still to hot! I've adjusted the little screw for temperature under the tray and turned it all the way down to no avail.

Anybody have an idea or should I go back to the store?

Thanks in advance!

(Newbie) Maurice
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qualin
Senior Member
qualin
Joined: 30 Jun 2012
Posts: 653
Location: Calgary, AB
Expertise: I love coffee

Espresso: Izzo Alex Duetto 3
Grinder: Mazzer Mini Elect. Type A
Vac Pot: Looking to buy
Drip: Manual
Roaster: Considering?
Posted Sat Nov 17, 2012, 2:26pm
Subject: Re: Problem with my Vibiemme Domobar Junior overheating
 

If your machine is the HX version, this is perfectly normal to see steam when flushing.

You should do a cooling flush just until you see the steam turn into just hot water, then pull your shot.

Read this article so that you understand how heat exchanging machines work:
http://www.home-barista.com/hx-love.html

Now, you say that after 30 seconds of flushing, the water is still too hot. Is it still steam or it is just hot water?

As well, what does your boiler pressure gauge read? It should read between 1.1 and 1.2 bar.

 
Garbage In, Garbage Out, for every step of the process. From Beans to grinder, grounds to machine, coffee to cup.
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Intrepid510
Senior Member


Joined: 30 Dec 2010
Posts: 355
Location: California
Expertise: I love coffee

Posted Sat Nov 17, 2012, 4:06pm
Subject: Re: Problem with my Vibiemme Domobar Junior overheating
 

What he described about the steam is normal, however I found when I got my the pressure stat was too high for my tastes from the factory. Basically by turning down the max pressure the steam boiler reaches before the heating element turns off your machine won't get so hot, but at the same time if you are making large lattes like steaming 10 ounces or more of milk it is harder to do when the pressure is low. On my machine I have it set to turn off at 1.1 when the heating element is on.

I guess the question should be, at what pressure does the heating element turn off?

 
Less water, more grounds.
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