Vibiemme DB Jr. brew pressure

by **burlsube** on Wed Nov 23, 2011 3:38 pm

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

by **Randy G.** on Wed Nov 23, 2011 4:04 pm

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?

by **burlsube** on Wed Nov 23, 2011 5:29 pm

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

by **stefano65** on Wed Nov 23, 2011 5:34 pm

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

by **burlsube** on Wed Nov 23, 2011 6:21 pm

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

by **stefano65** on Wed Nov 23, 2011 6:24 pm

part 12 from our web page drawing
http://espressocare.com/images/Parts%20...orksHX.jpg

by **burlsube** on Wed Nov 23, 2011 6:39 pm

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.

by **stefano65** on Wed Nov 23, 2011 7:02 pm

sorry I meant loosen not down dam English second langauge :roll:

counterclockwise

by **burlsube** on Wed Nov 23, 2011 7:55 pm

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

by **Randy G.** on Wed Nov 23, 2011 7:59 pm

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


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