Hello.

I just bought a used Nuova Simonelli Aurelia PLUS version made in 2006 (or 2008 ...cant read it well)
its model NUS-AURELIA2GRPLUS

I was wondering if it has or not a PID. Can the Aurelia PLUS be non PID'ed?

ok, looks like no one knows the answer for this specific question...,

but, is there any way to know if a machine has or not a PID installed?

thanx a lot

What a coincidence, i just bought one too, also a 2006.

It is not a pid'd machine. It has a pressurestat on the bottom right under the drip tray.

A pressurestat has a spring and a contactor that switches the element on and off, it has a dead band(the pressure range from when it clicks off and on) which varies a bit and therefore the temperature varies a bit.

A pid system uses a pressure sensor which translates the pressure electronically to a pid controller, the controller learns the pattern of the set pressure value and tries to keep it as constant as possible therefore keeping the dead band to a minimum.

I am busy converting mine(which I bought for R20000- about 2600$, with a free mythos grinder:) I'm just bragging:) to wbc spec by changing the gigleur's in the group and the flow meter and adding a pid to it.

Other than ease of adjustability, a PID on this machine isn't really necessary. The way the thermosyphon is designed helps it maintain a fairly stable brew temp and compensates for any variation as the element cycles on and off. I've used this machine for 3+ years and it is quite remark in it's stability for a h/x design. I definitely would suggest mod'ing the jets - this will give much more consistent extractions. I did see a temperature study done with a Scace on a WBC model (non-PID) and it demonstrated that on-the-fly adjustablity isn't possible and that the machine needs a considerable flush through both wands and group to lower the temp, and raising the temp takes the machine a considerable amount of time to readjust to the higher setting (around 10 minutes) If you are switching coffees often, then you are probably better off with a twin boiler set-up.

Thanks Javacat

Good to know about the non pid, it will save me a couple of bob.

As far as I know to get to Aurelia WBC config you have to replace the restrictors, change the level of the steam probe (I think it goes from 60% to something like 80% of water) and rise the boiler pressure to 1.2 bar. The PID should not make such a difference indeed. Is that the info you have?

Márcio.

Sorry to go off topic a bit, but. Would you know what size thread the restrictor has? I was thinking if getting brass plugs and drilling it the 1.5mm and 0.5mm holes needed for the conversion myself as the local NS agent does not keep them as stock items.

It looks like a 1/8 but with a wider thread distance?

thanx to all for the helpull replies.

I was wondering where can i find, or how can i mod the jets you talk about.
I mean, should i mod the flow restrictors in order to have the jets changed?

...guide me a little bit. Im new to this world, but i want to have a great machine.

Should i stick with the Aurelia? or what would you think about trading it (2006) for an Astoria (2010) ?

Hi, Craig and Sebastian.

I've added restrictors to my Oscar and I've got them from the Simonelli distributor here, they were from Aurelia/Appia. They are M8x1,25 plugs. I've got the 1.5mm and drilled 3mm and 3.2mm.

It should be easy to drill the holes you need if the plugs are brass. I can't remember the number of Aurelia WBC, are they 2.5mm bottom and 1.75mm upper inlet?

Sebastian, the restrictors I'm talking are placed in the inlets of the group, that connects to the thermosyphon. They play a role in regulating the idle group temperature (the smaller one does that) and the mix of both inlets water when brewing.

Other thing I don't remember about the WBC is the injector tube of the HX, if they have changed the size.

Márcio.

The lower one seems to be 3mm and the top ones either 1.5mm or 1.75mm