Vibiemme DB Jr. brew pressure

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burlsube
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#1: Post by burlsube »

After a recent descaling I noticed that my Vibiemme double boiler jr. brew pressure is running high. With the blind filter or double basket it is consistently at 1-1.2. I tried adjusting the brew stat (located center-left on the jr) and I have found it make no difference when moved in either direction even after waiting 25-30 mins. Any idea on how I can further trouble shoot this issue? Is it likely something I did when I descaled?

Thanks in advance

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Randy G.
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#2: Post by Randy G. »

Sounds like you are confused to me.. 1 to 1.2 is closer to what would be the pressure of the steam boiler. Normal indicated brew pressure is in the 9.5 to 10.0 range.

The steam boiler is regulated by a Jaeger pressurestat. The brew water temperature is regulated by a bulb thermostat.

So which are we talking about?
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burlsube (original poster)
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#3: Post by burlsube (original poster) »

You are correct. I was typing without thinking. The issue still persists with the pressure hovering around 11.5

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stefano65
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#4: Post by stefano65 »

sound like you are dealing with water pressure/pressure
not steam pressure,
turn the OPV screw down 1/8 of turn and test again with blind filter
Stefano Cremonesi
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burlsube (original poster)
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#5: Post by burlsube (original poster) »

Sorry for my ignorance, but where is the opv valve located on the domobar junior?

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stefano65
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#6: Post by stefano65 »

Stefano Cremonesi
Stefano's Espresso Care
Repairs & sales from Oregon.

burlsube (original poster)
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#7: Post by burlsube (original poster) »

Stefano,
I tried to tighten (clockwise) the opv valve, but I am unable to do so. It seems as if it is as tight as it will go.

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stefano65
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#8: Post by stefano65 »

sorry I meant loosen not down dam English second langauge :roll:
counterclockwise
Stefano Cremonesi
Stefano's Espresso Care
Repairs & sales from Oregon.

burlsube (original poster)
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#9: Post by burlsube (original poster) »

:) I think I'm almost there. What is an good place to start of the brew pressure? Around 9?

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Randy G.
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#10: Post by Randy G. »

Probably around 9.5. There is a pressure loss between where the gauge mounts and the coffee.
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