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La pavoni pro pressure issues (pre millennium)
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austindanson
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Joined: 10 Jun 2013
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Location: Santa Barbara
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Posted Sat Jun 22, 2013, 1:19pm
Subject: La pavoni pro pressure issues (pre millennium)
 

I just got my used la pavoni romantica the other day and have been trying to use it, but after letting the pressure raise and letting out a bit of steam, per the directions, the pressure would not raise any higher than .25 bar. I let it run for about ten minutes and it would only cycle between 0 and .25. I tried pulling shots and steaming at these pressures, but obviously ran out of pressure much too soon. any ideas how to fix this problem?
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NobbyR
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NobbyR
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Espresso: Poccino Opus One, Ariete
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Posted Sat Jun 22, 2013, 9:37pm
Subject: Re: La pavoni pro pressure issues (pre millennium)
 

As the boiler pressure indicated by the pressure gauge is an indirect measurement of boiler temperature, a pressure of 0.25 bar would mean luke warm water. Does the boiler feel really hot before and after venting the machine?

 
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"This drink of the Satan is so delicious that it would be a shame to leave it to the infidels." (Pope Clement VIII on coffee, when he was urged to ban the beverage)
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hankbates
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hankbates
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Espresso: La Pavoni Professional...
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Posted Sun Jun 23, 2013, 3:03am
Subject: Re: La pavoni pro pressure issues (pre millennium)
 

0.25 bar on the gauge with all air vented from the boiler at sea level is actually 223 F, and should be able to brew quite easily.  Steaming would be an issue, though.
I would guess there is either a plug of scale in the pipe leading to the pstat, or a pstat which has slipped its setting.
I would start by descaling it.
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NobbyR
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NobbyR
Joined: 10 Jul 2011
Posts: 2,058
Location: Germany
Expertise: I love coffee

Espresso: Poccino Opus One, Ariete
Grinder: Eureka Mignon Istantaneo
Vac Pot: N/A
Drip: Melitta Linea Unica de Luxe
Roaster: N/A
Posted Sun Jun 23, 2013, 3:30am
Subject: Re: La pavoni pro pressure issues (pre millennium)
 

hankbates Said:

0.25 bar on the gauge with all air vented from the boiler at sea level is actually 223 F

Posted June 23, 2013 link

Hmm, really? The pressostat of all the espresso machines I know are at 1.1 to 1.4 bar, when they are ready to go. And the pressure gauge of the Romantica doesn't show "green" at 0.25 bar neither. Apart from that I agree with descaling.

 
***
"This drink of the Satan is so delicious that it would be a shame to leave it to the infidels." (Pope Clement VIII on coffee, when he was urged to ban the beverage)
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austindanson
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Joined: 10 Jun 2013
Posts: 8
Location: Santa Barbara
Expertise: I love coffee

Posted Sun Jun 23, 2013, 9:40am
Subject: Re: La pavoni pro pressure issues (pre millennium)
 

ya, the brew is working alright, but steaming is obviously sort of impossible there. I've descaled twice... once with some solution and again with sodium bicarb... perhaps i need something a bit stronger?
And yes NobbyR, the boiler is really hot before and after venting... it stays quite hot as well, after venting it with the steam wand, but doesnt seem to hold steam after
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DanoM
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Posted Wed Jun 26, 2013, 10:55pm
Subject: Re: La pavoni pro pressure issues (pre millennium)
 

I think that unit has an adjustable pstat in the base, and someone has likely adjusted the settings.  You might take a look at this thread to see if the pstat type matches your machine:
Click Here (www.home-barista.com)
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