HomeRoast Digest


Topic: espresso machine follies--am I cursed? (45 msgs / 1032 lines)
1) From: Sandy Andina
Had been enjoying my LaCora (Andreja Premium) uneventfully for two  
months now.  Had it off all weekend while I was out of town.  My  
housekeeper came in this morning and turned it on; I awoke and made a  
shot and two lattes. About two hours later, I heard what sounded like  
a pop and then a piece of furniture being dragged briefly across sand.  
Ran into the kitchen and found steam coming out the top vents and the  
needle on the upper (steam) pressure gauge all the way to the right  
(past 3 bar).  Turned it off, peeked into the tank and saw it was only  
half full, so I topped it up. Bled steam and hot water off the wand  
and tap, till the gauge was back to normal and turned the machine back  
on.  Steam pressure needle rose all the way to the right again, so I  
bled more steam off till it was normal again and pulled a shot, which  
was still quite excellent.  Looked at the needle--straight up (abt.  
1.7 bar).  It stayed that way for half an hour, so I went back into  
the front room. Sure enough, heard that sudden steam blast again and I  
went into the kitchen, where I found the needle rising rapidly and  
steam coming out the vents.  Turned off the machine and bled the steam  
valve again. Called Cora Italian Specialties but only got their  
answering machine--I am now "in the queue" and must wait to be called  
back.
The APs are supposed to have an easily reachable P'stat. But I pried  
off the little plastic cap over the access port, shined a flashlight  
in (had to get on a stepladder and still scalded myself on the  
protruding exposed grouphead) and saw a tiny miniature screw with a  
little white hand (in a thumbs-up position) painted around it.  No way  
I can find a jewelers' screwdriver with a long enough handle to adjust  
the screw.  And I cannot seem to remove the housing for fuller access  
to the innards, the way I could for the Silvia and Livia.  What do I  
do now? I have no way to get the machine back to them--even empty,  
it's too heavy to carry down the stairs and into the car, there's  
nobody to help me and I have a bad back. I am hoping that for a fee  
they can include me on their Thursday North Side repair/delivery  
route, even though they told me they only do on-site repairs for  
commercial accounts.   I could do the "kludge" of turning it on,  
making drinks when it comes up to temp and turning it off in between  
sessions, but if it's broken I don't want to make things worse.
Maybe I am not meant to have a working espresso machine.
Sandy Andina
www.myspace.com/sandyandina
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2) From: Sheila Quinn
My espresso machine went kaput last week, too. I had it all heated up, 
started to run a blank shot, and heard a loud POP! The poor thing is 
completely dead and won't even power up. Not sure what to do about it, 
and I have no idea how to take it apart to look at the "insides."
I didn't use it every day, but I'm missing it already!
Sheila
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3) From: Lynne
Oh, I feel bad for both of you!
Mine went kaput too (the gifted one from Brett). Only got to use it about a
month, but it was a sweet month!
On the other hand, I had a toaster that also stopped working... kept it for
a year, with the intention of bringing it back to the store (I don't live up
to my reputation I earned throughout the years- my oldest daughter tells me
that store clerks would quiver when they saw me walking in the store.. lol).
But then my son plugged it in - and it's been working ever since.
So I'm going to do the same with the espresso machine. Hoping...
Lynne
On Tue, May 27, 2008 at 8:13 PM, Sheila Quinn 
wrote:
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4) From: Sandy Andina
I still have the Silvia, but it can't be left on all day, and I  
constantly have to jiggle the hoses to get the water to flow through  
the grouphead or out the wand. (Yes, I did descale and backflush).   
It's gonna be a long couple of weeks.....or longer.
Sandy Andina
www.myspace.com/sandyandina
On May 27, 2008, at 9:21 PM, Lynne wrote:
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5) From: Joseph Robertson
Oh Sandy,
I'm having espresso withdrawals just thinking about your situation. If I
only lived closer I drop by and get it downstairs and to the shop for you.
Don't give up, your not jinxed. Your stars must be in a bad way for the time
being. I will focus some positive coffee thoughts your way.
Cheers,
JoeR
On Tue, May 27, 2008 at 7:43 PM, Sandy Andina  wrote:
<Snip>
-- 
Ambassador for Specialty Coffee and pallet reform.
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6) From: Zara Haimo
<Snip>
My Giotto has been doing the same thing too - going way over normal pressure 
suddenly.  I've had to keep it turned off except when I'm getting ready to 
pull a shot.  If anyone knows the cause and fix, I'd like to hear it too.
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7) From: Barry Luterman
It's probably the p-stat. I replaced it myself in my Brewtus. It was
easy and took only about a half hour. Don't know about a Giootto. But
they are fairly straight forward if you can get at it.
On Tue, May 27, 2008 at 7:20 PM, Zara Haimo  wrote:
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8) From: miKe mcKoffee
Sticky p-stat. Replace.
Pacific Northwest Gathering VIhttp://www.mcKonaKoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must">http://home.comcast.net/~mckona/PNWGVI.htmKona Konnaisseur miKe mcKoffeehttp://www.mcKonaKoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
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9) From: Sandy Andina
Spoke to Cora's tech this morning--he said the p'stat is defective;  
thus it "dries out" if left on too long and needs to be replaced, at  
Cora's cost of course.  He is the only one on duty this week, so even  
if I brought it in today he couldn't do anything with it till Mon.  
(tomorrow is only their North Side delivery, not service, day).  He  
says if I power it up and let it warm up at least 1/2 hr. and then  
shut it off between shots I should be fine till Mon.  In the meantime,  
should I need espresso or a cappa sooner, then I can do the Miss  
Silvia "cheat" until the Cora is ready to use.  At any rate, if I get  
it there Mon. (when his assistant is back from vacation) they'll put a  
rush on replacing the p'stat and get it back to me a week from  
tomorrow (sooner if I come pick it up).
Sandy Andina
www.myspace.com/sandyandina
On May 28, 2008, at 9:57 AM, miKe mcKoffee wrote:
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10) From: Mike Chester
Sandy,
Replacement of the P'stat is so simple that they should be able to do it 
while you wait.  You pull 3 press on wires off and unscrew the stat. You 
screw the new one on and press the three wires onto the new one.  It takes 
longer to remove the shell.  While they are changing it, have them upgrade 
it to the Jaeger p'stat.  It is a direct replacement for the oem one on the 
QM machines and is much better.  When I bought my Vetrano, Chris' 
recommended upgrading it as they have had a lot of problems with the oem 
one.  They did it at or near cost at that time.  It would have cost much 
more later on.  They also offer the Sirai as an upgrade, but that requires a 
wiring change, and a mounting bracket and it makes loud clicking sounds when 
it cycles.  That is why I chose the Jaeger.  I have not had any trouble with 
the Jaeger.  miKe has had good luck with the tight band Barksdale PS also, 
if they can get that one.
Mike Chester

11) From: Barry Luterman
Jaeger is the one I upgraded to on my Brewtus also. No problems so far
in about a year.
On Wed, May 28, 2008 at 11:20 AM, Mike Chester  wrote:
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12) From: Michael Dhabolt
Sandy
These guys may not have access to the upgraded pstats, They don't
sound like any more than a parts changer operation (based on previous
posts).  Mike Chester is correct about the replacement, it is so
simple as to be embarrassing to charge for the job .... unless the
case is difficult to remove and replace.  If the upper drip tray is
removable (to open up the inside) the job can usually be accomplished
without completely removing the body work.  Pro-sumer machines are
subject to this malady on a pretty regular basis (depending on how
many hours a day it is left on), every couple of years is not unusual
without the upgraded Pstat ..... add a year or so with the high priced
spread.  It would be a good idea to bite the bullet and figure out how
to do it yourself. EPNW has what you want for ~=$25 or so.
Replacing group gaskets and Pstats are jobs that I try to show people
how to accomplish themselves, when the opportunity arises.
Mike (just plain)
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13) From: Sandy Andina
Hi, Mike,
The machine is fully under warranty (it is an Andreja Premium built  
according to John Cora's wish list: bigger, sturdier steam and hot  
water valves & knobs; narrower profile with same size boiler & tank;  
larger and deeper drip tray; feet to raise it off the counter for  
easier cleaning of drips, etc.; fully--360 degree--articulating steam  
& water wands); and the place, Cora Italian Specialties, is the top  
cafe supplier (equipment and consumables--beans, teas, cocoas, syrups,  
gelati mixes) in the Chicago area.  They do repair and rebuild  
prosumer and pro machines (e61 and bolt-to-boiler groups, pro  
grinders, etc.). The sales and demo rooms (including espresso and  
gelato training rooms) are operating-room clean and bright; the repair  
shop is in the huge attached warehouse.  It is the diametric opposite  
of Shop Espresso (the dusty little storefront chock-full of espresso  
and grinder parts from steam toys to home pumpers to prosumer to pro  
to superautos).  These folks are definitely NOT "parts changers."  The  
AP's case is difficult to remove, once the screws are out, without  
bending part of the metal sides.  Nonetheless, I may ask them to let  
me pick up the replacement p'stat tomorrow or Fri. and then walk me  
through replacing it by phone call on Mon. (the way Cafe West did with  
my Livia when its first p'stat blew a couple of weeks in).
Sandy Andina
www.myspace.com/sandyandina
On May 28, 2008, at 7:35 PM, Michael Dhabolt wrote:
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14) From: Sandy Andina
Should also mention it stayed on today from 1-9 pm, and nothing  
untoward happened.
Sandy Andina
www.myspace.com/sandyandina
On May 28, 2008, at 9:36 PM, Sandy Andina wrote:
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15) From: raymanowen
"Maybe I am not meant to have a working espresso machine."
Me, too! The blasted Crapesso responded to my last cleaning attempt by
breaking. It has a pressure regulator, but evidently the ultimate pressure
developed by the pump into a blocked filter for a pressure flush was too
much for Mickey.
I have a collection of many of the weird drivers, but the hidden snap
fasteners have no place in real machines.
Guess I need another new three prong plug... This gets expensive- only have
a 55w pump to show for the buck 70. The SMP got me for more than that before
the dawn came.
Cheers, Mabuhay -RayO, aka Opa!
Got Grinder?
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16) From: raymanowen
They finally got the word- the thermal overload resets itself instead of
permanently opening like a fuse. Mine's worse -ro
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17) From: miKe mcKoffee
<Snip>
In this case the failure was 100% the fault of the user not the machine. NO
machine without a 3-way valve should ever be backflushed. NO machine without
a 3-way valve user's manual ever gives backflushing as a method of cleaning.
Don't blame the machine for breaking when misused, 'taint it's fault.
Pacific Northwest Gathering VIhttp://www.mcKonaKoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must">http://home.comcast.net/~mckona/PNWGVI.htmKona Konnaisseur miKe mcKoffeehttp://www.mcKonaKoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
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18) From: Michael Dhabolt
Sandy,
Sounds like you are dealing with a different group of folks these
days.  I was thinking you were the one that had been getting the run a
round on a busted machine.
Mike (just plain).
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19) From: raymanowen
A definition of a suitable machine includes the necessity of doing what I
need it to do.  The coffee world seems to be a conglomeration of quaint
machinery with coffee looks and labels.
An expresso maker ought to have the capability of brewing a shot and being
cleaned without breaking. Whatever valve body it has, it would pump water
through the heat exchanger to either the hot water/ steam wand, the packed
grounds in the pf, stop the pump and relieve the pressure on top of the
packed grounds.
Cleaning it out so that grounds flushed out of their hiding places and blank
shots came out crystal clear always made for a cavalcade of cleaning steps
and about 300cc of water.
Couldn't be operator error- it's the only method that worked to give clean
shots. Maybe I don't know what I'm doing. I read the manual, and no mention
was made of how to avoid brewing with Bilge Water pumping through the
grounds. Cheap lesson to scratch another brand off my list.
Cheers, Mabuhay -RayO, aka Opa!
You gotta be smarter than the machine- put down that wedge!
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20) From: Sandy Andina
I had been getting the runaround--till I decided to give up on the  
clowns and go with Cora (which I should have the first time).  Cora is  
a class outfit, owned and run by people passionate about espresso (and  
all edible things Italian).  Metropolis had suggested them when my  
Livia first broke; because it was still under warranty I used Baratza/ 
Cafe West, which gave me excellent service, but they're all the way  
out in Oregon.  I had forgotten all about Cora, and when the Livia  
broke again after the warranty was up, I called Pasquini and they  
never mentioned Cora, just Shop Espresso and Espresso Best.  I would  
not hesitate to recommend Cora to anyone in the Chicago area needing  
service.
Sandy Andina
www.myspace.com/sandyandina
On May 29, 2008, at 1:25 AM, Michael Dhabolt wrote:
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21) From: Sandy Andina
Capresso and "real espresso" are, IMHO, mutually exclusive terms. I  
owned one (an Ultima).   No heat exchanger.  Never could get all the  
grounds or residue completely flushed out of it, as it was not a  
conventional machine--no portafilter; you loaded ground coffee into  
the hopper, turned the top, pulled a handle (which tamped the  
grounds), pushed a button and quasi-espresso came out a couple of  
metallic-plastic nozzles (movable up or down to fit a mug or  
demitasse)--sometimes with pale blonde crema, sometimes without.  Then  
you released the handle and turned the top again, dumping the puck  
into a catch bin and causing some water to drip into the overflow  
tray--both of which had to be emptied depressingly often (and the  
pucks were prone to growing mold if the catch bin didn't fill up fast  
enough for the "empty me, you lazy idiot" light to go on). The water  
never got cleaner than a disgusting pale grayish-tan.
  And you are asking for trouble backflushing any machine that lacks a  
solenoid valve.  Only way to clean that puppy was to take it apart and  
hope you could get at all the spring-loaded parts with a wet dishcloth  
and dry towel, which I never could.  Crummy steaming power too--tiny  
wand with foo-foo froth aider, everything was pushbuttons or switches,  
no user control at all.  Feh.  Unless you like having R2D2 on your  
counter (perhaps you could get the thing to mate with a Rexair Rainbow  
vacuum cleaner and it'd give birth to a baby R2D2).
Sandy Andina
www.myspace.com/sandyandina
On May 29, 2008, at 1:32 AM, raymanowen wrote:
<Snip>
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22) From: Michael Dhabolt
Sandy,
Sounds like you hit the jack pot with Cora.  A recommendation that
I've given to a bunch of folks that seems to have worked out well is
to: get a hold of the nearest La Marzocco outfit (where ever you are)
and ask them to recommend a tech in your local area.  I figure if they
are the big boys on the street for espresso machines, may as well use
them (or abuse them, as it were).
Mike (just plain)
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23) From: raymanowen
Make no misteak,
I don't mean to denigrate the Crapesso. It has a lot in common with the
Rexair Rainbow vacuum cleaner, but the Rainbow's suck is functional. Water
filter was a nice idea, but tends to corrode the vacuum motor in a year or
two, even keeping the thing cleaned out and dry after each use- I thought.
Iechyd da, Mabuhay -RayO, aka Opa!
Got Grinder?
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24) From: Brian Kamnetz
On Thu, May 29, 2008 at 11:39 AM,   wrote:
<Snip>
Good one, Ray!
Brian
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25) From: Barry Luterman
I missed the reference what about the Rainbow Vacuum. Someone once
tried to sell me one. I opted for an Oreck instead.
On Thu, May 29, 2008 at 6:49 AM, Brian Kamnetz  wrote:
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26) From: Sandy Andina
dang--after two days of behaving herself, LaCora blew her p'stat  
again.  I notice it happened a few minutes after I tried steaming and  
pulling simultaneously.  Shut her off, will let her cool, fire her up  
again only to pull shots and steam sequentially again till I can get  
the new p'stat in on Monday.
Sandy Andina
www.myspace.com/sandyandina
On May 29, 2008, at 1:53 AM, Michael Dhabolt wrote:
<Snip>
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27) From: Michael Dhabolt
Sandy,
The way the Pstat works is: it has a diaphragm that moves (with
changing steam pressure) to open and close a set of points.  When the
points open and close they 'arc' (all the current to the heaters go
thru them).  Each time they arc they transfer a microscopic amount of
metal from one to the other.  After they have opened and closed a
gazillion times they are no longer smooth and will frequently stick
closed.  Frequently shutting off the machine will cool down the points
and they'll snap open - everything will work fine for a few cycles
(open and closing of the points) but the problem will always come
back.
The relief valve on the boiler will relieve the excess pressure when
the points stick and the heaters stay on - - BUT - - The relief valve
is not designed to cycle frequently.  The 'set' pressure will almost
always change a bit after just a few overpressure excursions, it
doesn't usually change enough to make a difference.  After frequent
use, I have seen these relief valves stick closed, leaving the machine
and anyone nearby without overpressure protection.  In the, possibly,
excess interest in safety (CYOA) I always recommend replacing the
relief valve if the machine has a history of frequent pressure
excursions.
Mike (just plain)
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28) From: Sandy Andina
Thanks, Mike.
It's a fairly new machine and the problem is of extremely recent  
onset, but I will talk to the techs Monday and see if they'll replace  
both the p'stat and relief valve.  (In fact, the first "pfffft"  
sounded like an OPV to me).  I'm hoping that they can either deliver  
the part Thurs. and walk me through the replacements, or just pick it  
up and bring it back once repaired (they don't do on-site repairs for  
prosumer machines).  Sure hate to have to deal with Silvia in the  
meantime--jiggling those hoses is a real PITA.
Sandy Andina
www.myspace.com/sandyandina
On May 30, 2008, at 2:55 PM, Michael Dhabolt wrote:
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29) From: Michael Dhabolt
Sandy,
I just read my last post.  I hope you (or anyone else) isn't put off
by my pedantic explanations.
Mike (just plain)
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30) From: Derek Bradford
I thought your explanations were great.  I didn't know how a p-stat worked,
and I didn't know about the short life of the OPV, either.  No worries here.
--Derek
On Sat, May 31, 2008 at 10:58 AM, Michael Dhabolt 
wrote:
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31) From: Barry Luterman
Glad to know how an OPV works. Now if you can explain how to make my
car radio louder I will be all set to fix anything.
On Fri, May 30, 2008 at 4:04 PM, Derek Bradford  wrote:
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32) From: Michael Dhabolt
An OPV is a different valve .... it is in the line supplying high
pressure water to the brew circuit (heat exchanger,plumbing and group)
.... for all intents it is a pressure regulator that allows the brew
water pressure to be adjusted (approx. 9 bar - right?).
The relief valve (in this case) is on the boiler itself and is there
to relieve steam pressure in a controlled fashion, during a pressure
excursion ..... prior to reaching a pressure beyond which the boiler
could fail (leak or boom ... hot).
Unlike the brew circuit which is expected to see 130 to 150 psi
regularly, the boiler is not expected to see pressures in excess of 25
psi unless there is a serious problem.  The relief valve is usually
preset at the factory for 1.8 Bar (~26.5 psi) and have some kind of
seal to discourage tinkering.
The OPV functions whenever you pull a shot.  The relief valve only
functions when the boiler is in eminent danger of failure .... other
than a stuck Pstat it'll probably never be used .... not designed for
constant use ... one of those safety backup things.
Mike (just plain)
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33) From: Mike Chester
Mike,
Your explanations are very clear and useful.  While you are explaining the 
various valve functions, could you explain what the expansion valve does?  I 
have a pretty good idea, but I am not sure if I have it correct.  Does it 
require routine maintenance?  Thanks.
Mike Chester

34) From: miKe mcKoffee
OPV (over pressure valve) and expansion valve are synonymous.
Pacific Northwest Gathering VIhttp://home.comcast.net/~mckona/PNWGVI.htmDifferent not (just plain)
Kona Konnaisseur miKe mcKoffeehttp://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must">http://www.mcKonaKoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
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35) From: miKe mcKoffee
Oh maintenance wise. None except the usual descaling which when doing full
descale including group descaling solution backflush gets it too.
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36) From: raymanowen
Please keep up the posts. Make 'em as pedantic as you want- understanding
will gain. -ro
On Fri, May 30, 2008 at 7:58 PM, Michael Dhabolt 
wrote:
<Snip>
-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976
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37) From: Michael Dhabolt
Mike,
miKe is correct.  But a bit more info may be in order .... and as I
mentioned earlier, I'm in a pedantic frame of mind.
Expansion valve is a description normally used in dual boiler
machines, but is also appropriate for the brew circuit in some HX
machines.  The reason the valve is there seems to be frequently
misunderstood .  In a dual boiler machine the brew boiler is always
'solid' (full of water - no steam bubble as in a steam boiler).  The
brew boiler sees the local water system pressure thru the pump and a
check valve.  When you pull a shot, the pump starts and is regulated
(adjustment on pump) to approx. 9 Bar (132 ish PSI).  when the shot is
done - no more water going into the brew boiler - check valve closes -
no place for the water to go if it expands and increases pressure.
You just put a couple of ounces of cold water into a boiler that is
going to heat it up to approx. 201 F.  With the check valve making
sure that the water can't get out of the boiler the way it got in,
that couple ounces of water will heat up, expand and increase the
pressure.  So the brew boiler pressure will now start to increase from
the 9 Bar that it was fed with and if you don't do something to
relieve that pressure .... the boiler will see pressures well beyond
what it was designed for.  The classic way of dealing with that excess
pressure is putting a 'T' in the feed line between the check valve and
the boiler and run a small line from that 'T' down to an expansion
valve (usually in the drain cup under the drain tray).  The expansion
valve should be adjusted to relieve at a pressure above what is
required to pull the shot and below a pre-determined maximum operating
pressure for the boiler.  Max operating pressure is usually 12 Bar and
you pull shots at 9 Bar so adjusting the expansion valve to 10.5 to 11
Bar will keep it closed while you are pulling the shot but will drip a
little after the shot is done and brew boiler pressure increases.
So ... the expansion valve is dealing with the increased pressure
caused by the expansion of the cool feed water while it heats to brew
temperature.
Mike (just plain)
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38) From: miKe mcKoffee
I believe the big misconception is if OPV/expansion valve set above 9bar
means shot will automatically be pulled above 9bar. Such is not the case.
Puck build and it's resistance primarily determines actual shot pressure up
to OPV release point. Which is to say an OPV may be set rather high like
18bar and still pull 9bar range shot. However, having the OPV closer to
desired shot level can be more forgiving. Used 18bar as example because my
old Silvia was in fact that high for over two years before getting PF gauge
and doing washer OPV mod.
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39) From: raymanowen
Sometimes, in an attempt to learn something, I find I have to decode the
language of the information I dig up. I appreciate it all, because it forces
me to think when I'm reading coded language. The following obfuscation
forced me to analyze phrases to isolate an answer:
"...In this case the failure was 100% the fault of the user not the machine.
[Not a first for me]
NO machine without a 3-way valve should ever be backflushed. [Why is that?
The independent critic to whom I am married thinks I was making progress in
brewing doubles- her current exclusive drink.] Friday night's/ Saturday
morning's- today's- Uganda Bugisu (FC+) is "very smooth, great," but only
rated a sip. Shots got drunk up.
NO machine without a 3-way valve user's manual ever gives backflushing as a
method of cleaning. [Repetition for emphasis, but my valve had a position
where the pf pressure was completely relieved. 3-way valves have what
additional feature-??]
Don't blame the machine for breaking when misused, 'taint it's fault.
[Misuse, as in descale and clean the damn thing with its own pump and
pressure relief into a blocked filter basket?] If I couldn't clean it, it
was a candidate for a name change- Compresso under a CAT D-10, if Wagner
would oblige me.
Cheers, Mabuhay -RayO, aka Opa!
Got Grinder?
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40) From: Tom Ulmer
To my pedantic mind the discussion furthers to normal versus abnormal
operating conditions. I find your participation enlightening and well
versed. Thanks.

41) From: Mike Chester
Thanks miKe - That's what I thought, but I have seen both names used at the 
same parts supplier and thought there might be some subtle difference.
Mike Chester

42) From: Mike Chester
I see listings for replacement seats for expansion valves and I thought that 
they might need periodic replacement.

43) From: Brian Kamnetz
Mike (just plain),
I personally always enjoy the descriptions of technical things in your
posts, and look forward to them.
Brian
On Fri, May 30, 2008 at 9:58 PM, Michael Dhabolt
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44) From: Joseph Robertson
Mike,
I will second or third all the comments on enjoying your technical
descriptions. Most home roasters tend to be technical oriented.
Hey we are hanging sheet rock in our little shop in Stevenson. Look forward
to seeing you at the PNWGVI.
JoeR
On Fri, May 30, 2008 at 11:07 PM, Michael Dhabolt 
wrote:
<Snip>
ee.com
<Snip>
-- =
Ambassador for Specialty Coffee and pallet reform.
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45) From: Ed Needham
I dealt with Peter Cora way back in the '70's for my coffeehouse, when he 
was pretty much the only guy in America selling espresso machines.  I'm 
guessing he's passed on by now.  He was an old guy then.
*********************
Ed Needham
"to absurdity and beyond!"http://www.homeroaster.com*********************


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