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La Nuova Era Cuadra Owners Thread
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1stline
Senior Member
1stline
Joined: 24 Jan 2002
Posts: 492
Location: Freehold, NJ USA
Expertise: Professional

Espresso: Undisclosed
Grinder: Indisclosed
Vac Pot: Bodum Electric
Drip: None
Roaster: None
Posted Fri May 31, 2013, 1:09pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

pfn Said:

I still think you introduced a leak by opening up the top of the group? I imagine you have some sort of pinhole leak that allows the heat exchanger to lose a seal and stall the thermosyphon. I don't know where the water would go to impact the temperatures so dramatically, though.

Posted May 31, 2013 link

On the machine in question, we actually forced a stall by removing water out of the thermosyphon tubes. To the contrary of my belief, the temp gauge on the grouphead increased to 235-237 range instead of lowering as we witnessed. The boiler is maintaining temp as witnessed by the gauge and heating element activity.

I pretty much took apart the grouphead, inspected and replaced the seals, as there was a leak from the lower valve. I did have to descale the gicleur as it was almost blocked. Only very little water was passing through.

From my understanding, this problem only happens upon warm up. This is where the challenge lies.

Personally, I think the injector tube inside the HX portion of the boiler is blocked or damaged or may need to be shortened.

 
Sincerely,
Jim Piccinich
Business Partner
1st-line Equipment, LLC
www.1st-line.com

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Twitter: http://twitter.com/1stline
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1stline
Senior Member
1stline
Joined: 24 Jan 2002
Posts: 492
Location: Freehold, NJ USA
Expertise: Professional

Espresso: Undisclosed
Grinder: Indisclosed
Vac Pot: Bodum Electric
Drip: None
Roaster: None
Posted Fri May 31, 2013, 1:11pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

SStones Said:

Replace the relay.  It has burnt its contacts and become coated in carbon. Instead of a clean metal on metal electrical connection, your current is flowing through the thin larer of carbon which is heating the hell out of the thin, copper contacts in the relay and they lose their rigidity and break contact. Your machine stops heating because of the relay failure, without heating it never comes up to pressure.
I would suggest upgrading to a much better relay, like a decent solid state relay. This has all been pointed out before.  If you want pictures of how the upgrade is possible, send me an email.

Or for a permanent link, someone could have my photos and the write up, and put up a URL for all coffeegeeks to see.

Posted May 31, 2013 link

Thanks for being upfront on your other post. The relay was replaced a few weeks ago. Let us know which relays you believe would work better.

 
Sincerely,
Jim Piccinich
Business Partner
1st-line Equipment, LLC
www.1st-line.com

Follow us on Facebook: http://www.facebook.com/1stline
Twitter: http://twitter.com/1stline
Blog: http://1st-line.blogspot.com/
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 474
Location: Canada
Expertise: Professional

Espresso: Giga 5, ECM Giotto, Rocket...
Grinder: Anfim Milano-Best
Vac Pot: No  :(
Drip: Some $30 thing from Walmart
Roaster: I buy pre-roasted.
Posted Sat Jun 1, 2013, 9:34pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

1stline Said:

Thanks for being upfront on your other post. The relay was replaced a few weeks ago. Let us know which relays you believe would work better.

Posted May 31, 2013 link

G3NA-220B, from Omron.  It's a decent, solid-state, 20 amp relay that fits nicely in the space available either in the back of the Cuadra, or in the bottom if you cut and reposition the insulation on the reservoir holder.  In the back is probably the better location, it is cool and has plenty of airflow.
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cruizie
Senior Member


Joined: 16 May 2012
Posts: 48
Location: Ohio
Expertise: Just starting

Espresso: La Nuovo Era Cuadra
Grinder: Baratza Vario
Roaster: Poppery
Posted Wed Jun 5, 2013, 9:36am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

Quick question about cleaning the dispersion screen and gasket.  I removed them this morning and they weren't really very dirty.  However, I did find a thin piece of cardboard stuck to the top of the gasket (see pic).  Should this be there or was it supposed to have been removed?  I don't think I need it but thought I should ask to make sure.  Anything else up in there I need to clean while this is out?  Also, do I need to use any silicone or grease or anything when reinstalling the gasket into the grouphead?  Thanks!

cruizie: IMG_20130605_112555.jpg
(Click for larger image)
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slybarman
Senior Member
slybarman
Joined: 3 Nov 2011
Posts: 366
Location: usa
Expertise: I love coffee

Espresso: La Nuova Era Cuadra
Grinder: Baratza Vario
Posted Wed Jun 5, 2013, 5:57pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

cruizie Said:

Quick question about cleaning the dispersion screen and gasket.  I removed them this morning and they weren't really very dirty.  However, I did find a thin piece of cardboard stuck to the top of the gasket (see pic).  Should this be there or was it supposed to have been removed?  I don't think I need it but thought I should ask to make sure.  Anything else up in there I need to clean while this is out?  Also, do I need to use any silicone or grease or anything when reinstalling the gasket into the grouphead?  Thanks!

Posted June 5, 2013 link

AFAIK, that should not have been in there. You can visually inspect the brew head with the screen removed and clean an oils/deposits from the group head and the channel the gasket sits in. Use a bit of food safe lubricant on the gasket when you reinsert it.
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cruizie
Senior Member


Joined: 16 May 2012
Posts: 48
Location: Ohio
Expertise: Just starting

Espresso: La Nuovo Era Cuadra
Grinder: Baratza Vario
Roaster: Poppery
Posted Wed Jun 5, 2013, 6:01pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

Thanks for the reply. That's what I thought.  What kind of food safe lubricant?
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hirschaj
Senior Member
hirschaj
Joined: 18 Sep 2012
Posts: 12
Location: Idaho
Expertise: I love coffee

Espresso: Cuadra II
Grinder: i-Mini
Posted Wed Jun 5, 2013, 11:24pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

cruizie Said:

Quick question about cleaning the dispersion screen and gasket.  I removed them this morning and they weren't really very dirty.  However, I did find a thin piece of cardboard stuck to the top of the gasket (see pic).  Should this be there or was it supposed to have been removed?  I don't think I need it but thought I should ask to make sure.  Anything else up in there I need to clean while this is out?  Also, do I need to use any silicone or grease or anything when reinstalling the gasket into the grouphead?  Thanks!

Posted June 5, 2013 link

Isn't that a shim?
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 474
Location: Canada
Expertise: Professional

Espresso: Giga 5, ECM Giotto, Rocket...
Grinder: Anfim Milano-Best
Vac Pot: No  :(
Drip: Some $30 thing from Walmart
Roaster: I buy pre-roasted.
Posted Thu Jun 6, 2013, 4:32am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

That's a half-mm paper shim.  It's there to keep your gasket at the correct height so that your portafilter  handle turns comfortably to the right angle with the portafilter sealing well.  If your handle seats well with it in there, keep it in with the new gasket.  If you struggle to turn your handle past the perpindicular, then you might be happier without the shim.
If you can still see the printing on one side of the shim, printed side goes against the gasket, unprinted side up against the grouphead.
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1stline
Senior Member
1stline
Joined: 24 Jan 2002
Posts: 492
Location: Freehold, NJ USA
Expertise: Professional

Espresso: Undisclosed
Grinder: Indisclosed
Vac Pot: Bodum Electric
Drip: None
Roaster: None
Posted Thu Jun 6, 2013, 9:01am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

cruizie Said:

Thanks for the reply. That's what I thought.  What kind of food safe lubricant?

Posted June 5, 2013 link

I hate surprises by manufacturers. As stated, you can keep it in there. A food grade lube we use is Petrogel. There are also others that have been recommended on this web site.

 
Sincerely,
Jim Piccinich
Business Partner
1st-line Equipment, LLC
www.1st-line.com

Follow us on Facebook: http://www.facebook.com/1stline
Twitter: http://twitter.com/1stline
Blog: http://1st-line.blogspot.com/
YouTube: http://www.youtube.com/user/1stlineespresso
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slybarman
Senior Member
slybarman
Joined: 3 Nov 2011
Posts: 366
Location: usa
Expertise: I love coffee

Espresso: La Nuova Era Cuadra
Grinder: Baratza Vario
Posted Thu Jun 6, 2013, 9:15am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

Sorry for the bad info. Mine did not have that in there.
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