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Date: 27 Feb 2007 19:15:14
From: Natalie Drest
Subject: Gaggia brew thermo temp?
Just a quick one:
What temperature is the standard brew thermostat on the domestic machines?

TIA
Ciao for Niao






 
Date: 28 Feb 2007 12:57:43
From: Flasherly
Subject: Re: Gaggia brew thermo temp?
On Feb 28, 6:02 am, "Natalie Drest"
<fugeddabou...@notarealemailaddress.net > wrote:
> "Flasherly" <gjerr...@ij.net> wrote in message
>
> news:1172624984.273619.4610@k78g2000cwa.googlegroups.com...
>
> > On Feb 27, 3:15 am, "Natalie Drest"
> > <fugeddabou...@notarealemailaddress.net> wrote:
> >> Just a quick one:
> >> What temperature is the standard brew thermostat on the domestic
> >> machines?
>
> >> TIA
> >> Ciao for Niao
>
> > Measure it with a thermometer in a cup... (snip)... although can't say
> > I've read them.
>
> Thanks for replying, but I have reasons for wanting to know what temp brew
> themostats the Gaggias are fitted with. The temp is always printed clearly
> on the side of the thermostat, it'll be 100.C, 107.C etc.
>
> Anybody know?

Here's the startup blurb (ebay Guide ID: 10000000001213479) -

Using a Gaggia espresso machine -
Some Gaggia models may have three-way solenoid valves and some have
steam valve knob on the top while others have them in front or on the
sides, but **all Gaggia's for home use** operate in the same
manner. ...pump delivers more pressure than is needed for optimum
extraction of coffee from the grounds (9 bars or 130psi); this excess
pressure is regulated by a pressure relief valve which directs excess
volume back into the reservoir. The water from the pump is then
directed into the boiler where the temperature is raised to the
correct range - 195F to 209F.

Taken to another home user working on a Gaggia, part specifications
appear ambiguous - a "toasty" setup w/ temperatures likely to drop
over extraction time -

... 107'C for brew water and 145'C for steam. There is a differential
that applies to the target temperature, representing a tolerance
around this set point for when the switch opens and closes. Of course,
the boiler temperature will also continue to rise for a short time
after the elements turn off ...(leading to temperature surfing....

Aside: I have not been able to find concrete information about the
part suffixes (see part numbers below). I'm not sure if they refer to
the tolerance/differential at all or not, though different classes of
differentials are available for disk-type thermostats. The 'C' suffix
could refer to a differential class or perhaps the mounting type (I
don't believe that it means Celsius).

Brew Thermostat (thermo disk, auto reset)
Original Part: 36TXE31 L107-8C
Temperature Rating: 107 degrees Celsius
(224.6 degrees Fahrenheit)



 
Date: 27 Feb 2007 17:09:44
From: Flasherly
Subject: Re: Gaggia brew thermo temp?
On Feb 27, 3:15 am, "Natalie Drest"
<fugeddabou...@notarealemailaddress.net > wrote:
> Just a quick one:
> What temperature is the standard brew thermostat on the domestic machines?
>
> TIA
> Ciao for Niao


Measure it with a thermometer in a cup, directly from the boiler
without a PF in place. Cooler coffee around 160F is fine for taste,
although optimal extractions provided from the boiler can vary from
195-205F, which is why people pop a couple bills to retrofit machines
with more precise temperature constraints. Better machines don't
always account for optimal temperature and vary, enough to be
commonplace occurance. Without retro-fitting better controls, the
alternative is to "surf" the temperature. Don't know what the factory
specifications for your machine are, but at the steam setting, you've
basically higher temperatures to "surf down" from, (by cycling out of
steam -early- and into the lower temperature extraction setting,
albeit somewhat raised), for a resulting extraction closer to what the
bean likes. Takes some playing about with a thermometer. If it's too
cold an extraction, tends to be sour - too hot, then bitter. Should be
plenty faqs on the technique, although can't say I've read them.



  
Date: 28 Feb 2007 22:02:33
From: Natalie Drest
Subject: Re: Gaggia brew thermo temp?

"Flasherly" <gjerrell@ij.net > wrote in message
news:1172624984.273619.4610@k78g2000cwa.googlegroups.com...
> On Feb 27, 3:15 am, "Natalie Drest"
> <fugeddabou...@notarealemailaddress.net> wrote:
>> Just a quick one:
>> What temperature is the standard brew thermostat on the domestic
>> machines?
>>
>> TIA
>> Ciao for Niao
>
>
> Measure it with a thermometer in a cup... (snip)... although can't say
> I've read them.

Thanks for replying, but I have reasons for wanting to know what temp brew
themostats the Gaggias are fitted with. The temp is always printed clearly
on the side of the thermostat, it'll be 100.C, 107.C etc.

Anybody know?




   
Date: 28 Feb 2007 11:19:52
From: Coffee for Connoisseurs
Subject: Re: Gaggia brew thermo temp?
http://www.coffeeparts.com/gag/gag2.html


--
Alan

alanfrew@coffeeco.com.au
www.coffeeco.com.au