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La Nuova Era Cuadra Owners Thread
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Discussions > Espresso > Machines > La Nuova Era...  
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MDiddy
Senior Member


Joined: 3 Oct 2012
Posts: 118
Location: PA
Expertise: I live coffee

Espresso: ECM Technika IV Profi
Grinder: Baratza Forte AP
Drip: Cuisinart DCC-1200
Posted Wed May 8, 2013, 6:17am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

Iluvdabean Said:

This still doesnt make a lot of sense.You cleaned it and then this! Did you adjust anything while inside?How old is your machine?

Posted May 6, 2013 link

No other adjustements were made at all.  The machine was completely closed up.

Again, all I did was pull the mushroom, clean out the group and parts, and then reassemble.  Nothing else.

Machine is only a little over 4 months old as well.
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pfn
Senior Member


Joined: 1 Apr 2013
Posts: 64
Location: Santa Clara, CA, US
Expertise: I like coffee

Espresso: La Nuova Era Cuadra II
Grinder: KA Proline w/ Mazzer Mini...
Posted Wed May 8, 2013, 6:39am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

MDiddy Said:

If there's a clog, though, why would simply running some water through the hot water valve fix the issue and then let the machine heat up normally?  I would think if there was a blockage, it would stall and that would be it, no?

Posted May 8, 2013 link

How long do you leave the machine on after it reaches temp? Kinda guessing on unknowns here...
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Iluvdabean
Senior Member
Iluvdabean
Joined: 7 Mar 2005
Posts: 1,294
Location: Kentucky
Expertise: I love coffee

Espresso: La Nuova Era Cuadra/Gaggia...
Grinder: Baratza Preciso/K-A Pro...
Drip: Bonavita BV 1800 TH
Roaster: Nesco 1010/Behmor 1600
Posted Wed May 8, 2013, 6:45am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

If I were you I would call Jim and do what he says. I think he knows espresso machines and he is a nice guy. I dont think its rocket science and I am not one who beleives in just changing parts until the problem goes away. They are robust machines of good quality and
this should be done by now.
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1stline
Senior Member
1stline
Joined: 24 Jan 2002
Posts: 499
Location: Freehold, NJ USA
Expertise: Professional

Espresso: Undisclosed
Grinder: Indisclosed
Vac Pot: Bodum Electric
Drip: None
Roaster: None
Posted Wed May 8, 2013, 11:43am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

MDiddy Said:

ROFL.  You rock man!

Just an update:

With the new one relay installed, the machine still doesn't fully heat.  After I turn it on, it heats up to about 190 F and then stops.  I can get it to go the whole way up to 204 F by simply flushing water through the hot water tap until the pump kicks on to refill and then turning it off.  As soon as I do that, the temp will start to climb again and get up to 204 and stay there.

I'm thinking it may be the OPV.  Any good procedures on how to remove and clean it?

Posted May 6, 2013 link

If it were the OPV, you would see a lot of water in the drip tray.

It sounds like a thermosyphon stall. To confirm, the gauge would be reading normal (meaning boiler is heating), but the gruppo is losing heat.

As suggested, descale machine boiler and grouphead with blind. We need to make sure the thermosyphon tubes are clear and the OPV is clean. Descaling would rule these out.

If the gauge is going down, then it is probably not a thermosyphon stall, but electrical in nature.

Please confirm if it is plugged into a GFI outlet. If not, can you plug the machine into one? Does it trip the GFI? if yes, there is a high chance the boiler was run dry (too much water taken out of the hot water valve).

Second, unplug machine. Check the wires on the switch under the reservoir. Make sure they look good, are properly attached. Same with wires on heating element. Do any look burnt/fried?

Third, when hot to 190, feel electrical cable and see if it gets very hot.

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

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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 May 9, 2013, 3:45am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

FWIW - I came downstairs this morning and my grouphead was sitting at 178. It was a definite thermosyphon stall. Boiler pressure was up. After a 10 second flush the grouphead temp started climbing on its own and after a few minutes or so was up to normal temp.

This doesn't happen often, but if you look back at my posts, you will see that it has happened before.

I suspect this happens on HX machines more often than people realize, only the people that do not have Eric's thermometer just never know it. They flush and pull their shot and never realize the group head was below normal temp - only that their first shot of the day didn't taste as good as they would like. If you have the info, it is easy enough to remedy before wasting a shot. Without the thermometer, you are just guessing what your temps are.
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scanfield
Senior Member


Joined: 21 Nov 2011
Posts: 181
Location: Texas
Expertise: I like coffee

Espresso: La Nuovo Era Cuadra
Grinder: Baratza Vario
Posted Thu May 9, 2013, 10:10am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

slybarman Said:

It was a good year ago, so my memory is fuzzy. I had an exchange with Jim from 1st line about it at the time. IIRC, it was the shaft only. I seem to recall you cannot disassemble the "T" shaped part of the valve from the machine (at least not easily). Best I can remember I removed the shaft the knob rides on and lubed it and then reassembled.

Posted May 6, 2013 link

Can you tell me how to remove the knobs? It looks like you have to remove the plastic disk in the center, but I can't figure out how to pry them out without damaging them. Any hints?
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MDiddy
Senior Member


Joined: 3 Oct 2012
Posts: 118
Location: PA
Expertise: I live coffee

Espresso: ECM Technika IV Profi
Grinder: Baratza Forte AP
Drip: Cuisinart DCC-1200
Posted Thu May 9, 2013, 10:14am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

scanfield Said:

Can you tell me how to remove the knobs? It looks like you have to remove the plastic disk in the center, but I can't figure out how to pry them out without damaging them. Any hints?

Posted May 9, 2013 link

You're correct in how to remove them.  Unfortunately, I couldn't find a way to do it without hacking up the center caps a little.

Problem is, you need something very thin as there isn't much gap there and those suckers are in there tight.  I honestly don't think there's a way to avoid it.
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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 May 9, 2013, 12:51pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

scanfield Said:

Can you tell me how to remove the knobs? It looks like you have to remove the plastic disk in the center, but I can't figure out how to pry them out without damaging them. Any hints?

Posted May 9, 2013 link

You will want to confirm with Jim to make certain my memory is correct, but what I recall was that you have to hold the valve body (red arrow) absolutely securely to make it does not move at all (very important) while you loosen the nut (green arrow). Once that is loose, the shaft will slide out of the valve.

On another note, I had not purged water from my boiler in way too long so I drained 8 ounces from the hot water wand just now (4 at a time of course). It was as clean and clear and odor free as the water I poured into the reservoir, so your boiler water has me that much more weirded out.

slybarman: 2013-05-09 16.28.41.jpg
(Click for larger image)
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 510
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 May 9, 2013, 6:26pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

To MDiddy:
I think your problem is not the same as Bean's relay issue.  Yours heats up and is cured by letting out boiler pressure, not HE pressure.  Your breather/AntiVacuum valve is possibly gunked up.  When your machine cools off it retains some pressure in the boiler instead of settling to atmosphere through the breather.  Then when you turn it on and the pump tops up the boiler, it compresses that room temperature air (False pressure, caused by pumping, not by steam creation) and then it only takes a little heat to bring the pressure up high enough to get the pressostat to shut off the heating circuit.  Hence a barely hot boiler.  You open the steam or water valve, that false pressure escapes and isn't immediately replaced by steam (Because the water isn't up above boiling temp.) the pressostat reacts to the new, correct boiler pressure and normal heating commences.

The breather valve is one side of that multi-function valve that sits around your pressostat on top of the boiler. Two soft hoses run from it to drainage, a copper coiled line runs from it to your gauge... That thing.
You can try opening it and cleaning everything.  BE VERY CAREFUL. The spring will fly across the room even if you're expecting it. Work in a clean workspace. Open the ends of the valves slowly, carefully and with the valves pointed into the palm of your hand for when the miniature spring makes its escape.

You can test it before opening it. If, with the boiler fully cooled and the steam valve open, you should be able to get air to flow through it in both directions by blowing and sucking on it.  It should prevent flow when sucked on hard.
The other side of that valve is your safety relief to protect the boiler from getting to dangerously high pressures.  If it doesn't leak, you might want to just leave that side alone.
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MDiddy
Senior Member


Joined: 3 Oct 2012
Posts: 118
Location: PA
Expertise: I live coffee

Espresso: ECM Technika IV Profi
Grinder: Baratza Forte AP
Drip: Cuisinart DCC-1200
Posted Thu May 9, 2013, 6:43pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

SStones Said:

You can test it before opening it. If, with the boiler fully cooled and the steam valve open, you should be able to get air to flow through it in both directions by blowing and sucking on it.  It should prevent flow when sucked on hard.
The other side of that valve is your safety relief to protect the boiler from getting to dangerously high pressures.  If it doesn't leak, you might want to just leave that side alone.

Posted May 9, 2013 link

Just to clarify, with the machine cool, I should be able to open the steam valve be able to blow through it.  But a sucking pressure should stop it?  Correct?

Trying to word that without sounding sexual is difficult.  LOL
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