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Conti 2-Group Club
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Jchonparadise
Senior Member


Joined: 12 Mar 2012
Posts: 4
Location: Denton, TX
Expertise: Pro Barista

Posted Tue Jul 17, 2012, 7:45am
Subject: Conti 2-Group Club
 

My Conti Club is constantly running at a pressure above optimal, causing the pressure relief valve to nearly continuously release.

The manual only mentions adjusting pressure at the group head, not the main tank pressure.

How can I just adjust the pressure down into the "green" on my machine?
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SpromoSapiens
Senior Member
SpromoSapiens
Joined: 26 Feb 2010
Posts: 102
Location: Boise ID
Expertise: I live coffee

Espresso: Riviera Eagle, '91 Livietta,...
Grinder: Vario, KA ProLine, Sozen...
Drip: Clever, V60
Roaster: Behmor 1600
Posted Fri Jul 20, 2012, 7:54am
Subject: Re: Conti 2-Group Club
 

Hi Jchonparadise,

I'd love to see that manual -- I was never able to track one down for my 1-group Club. I don't even understand how someone would go about adjusting pressure at the group; that strikes me as a little bizarre. To adjust boiler pressure and bring the group-water temp down, you need to adjust the pressurestat. On mine, looking at the front of the machine, the Sirai Pressurestat is found just behind the left-hand panel. I take the left side panel off and see it as it appears in the attached photo (circled in green).

This was hard for me to recognize because in 1-group Contis, the 'stat is mounted sideways. As such, one cannot slide the cover off in order to adjust it. Instead there's a hole drilled through the cover, allowing screwdriver access to twist the adjustment screw. I needed a decently long-necked flat-head.

To decrease boiler pressure and lower group-water temp, twist clockwise.
To increase boiler pressure and raise group-water heat, twist counterclockwise.

(Note: This does run contrary to our usual assumption of right=up / left=down, which we learn from stereo volume knobs, gas range knobs, etc. In this case, right = pressure down, left = pressure up.)

SpromoSapiens: sideways sirai CG.JPG
(Click for larger image)
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SpromoSapiens
Senior Member
SpromoSapiens
Joined: 26 Feb 2010
Posts: 102
Location: Boise ID
Expertise: I live coffee

Espresso: Riviera Eagle, '91 Livietta,...
Grinder: Vario, KA ProLine, Sozen...
Drip: Clever, V60
Roaster: Behmor 1600
Posted Fri Jul 20, 2012, 8:01am
Subject: Re: Conti 2-Group Club
 

Here's a closer look at the holes on the Pressurestat.

Needless to say, the machine should be fully powered down and unplugged while making this adjustment. No need to let it cool, just cut the electricity -- just in case.

When making the adjustment, it might take a few full turns of the screw, but generally not more than that. I kept mine set at about 1.0/1.1 at the top of its heat cycle.

Hope this helps!

SpromoSapiens: sirai holes.JPG
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