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The Rancilio S20 Series Thread (S24, S26, S27)
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Discussions > Espresso > Machines > The Rancilio S20...  
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CWWang
Senior Member


Joined: 7 Feb 2011
Posts: 61
Location: Florida
Expertise: I love coffee

Espresso: Arrarex Caravel. La Peppina....
Grinder: La San Marco SM91
Posted Thu Mar 3, 2011, 11:39pm
Subject: Re: The Rancilio S20 Series Thread (S24, S26, S27)
 

There is one more question about my Rancilio S27.
As I compare my circuit board to StevenZ's post, I found there is something missing in mine. It looks like a resistance, but as far as I know, a resistance should have at least three bands on it. But my missing gadget only one band. Does anyone know what is that? (The circle one in attached photo)

Thanks

CWWang: resistance2.JPG
(Click for larger image)
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aleks192
Senior Member


Joined: 2 Sep 2010
Posts: 39
Location: Calgary
Expertise: I live coffee

Espresso: Rancilio S26
Grinder: Wega Max 6.4
Roaster: Toastess Popper
Posted Fri Mar 4, 2011, 9:10am
Subject: Re: The Rancilio S20 Series Thread (S24, S26, S27)
 

CWWang Said:

There is one more question about my Rancilio S27.
As I compare my circuit board to StevenZ's post, I found there is something missing in mine. It looks like a resistance, but as far as I know, a resistance should have at least three bands on it. But my missing gadget only one band. Does anyone know what is that? (The circle one in attached photo)

Thanks

Posted March 3, 2011 link

Its a zero ohm resistor.......used as a board jumper often instead of a wire

 
Rancilio S24 Rotary Red | Wega Max 6.4
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aleks192
Senior Member


Joined: 2 Sep 2010
Posts: 39
Location: Calgary
Expertise: I live coffee

Espresso: Rancilio S26
Grinder: Wega Max 6.4
Roaster: Toastess Popper
Posted Fri Mar 4, 2011, 9:13am
Subject: Re: The Rancilio S20 Series Thread (S24, S26, S27)
 

I think this week I'm going to try to mod my machine to do a line pressure preinfusion.....Want to isolate the 3 way solenoid, and add a switch, so that you flip swtich 1 for the solenoid to open and allow line pressure, and switch 2 to power the pump......Am I missing something, because this hasn't really been tried by anyone on this thread so I'm not sure if its been tried and didn't work?

 
Rancilio S24 Rotary Red | Wega Max 6.4
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SteveZ
Senior Member


Joined: 30 Nov 2010
Posts: 24
Location: Littleton, Co
Expertise: I love coffee

Espresso: Rancilio S27
Grinder: Baratza Vario
Posted Fri Mar 4, 2011, 11:01am
Subject: Re: The Rancilio S20 Series Thread (S24, S26, S27)
 

Aleks, Seems reasonable. I have my single dose button setup as a quick 2 second preinfusion. After this I wait 10 to 15 seconds and then press the double dose button.  Your method is nice because it would skip the 3 way pressure release step. Someone (homebarista perhaps) mentioned that they believed the slow pressure build up of the S27 rotary pump is similar to a quick preinfusion. I'm thinking that the soak time is too quick be much use but it is a somewhat interesting opinion.


Chun, I have more pictures of my control board but the hot water function of my board does not work (always on).  Also, my board is from the first year of production, 1994. Your board might be a newer version.

Not sure from your posts but have you tried:
  1. Checking the voltage at the hot water solenoid
  2. Momentary switch check with your multimeter
  3. Swapping the solenoid from your fill circuit in.

I bypassed my control board by using a 125v momentary hot water switch from La Marzocco and some high temp wire.  Works well for me.

All, I just installed a temperature probe on my group head using Eric's adaptor and the cheapest Auber PID as a display. Installation was a snap (Before & after ). Knowing the temperature is helping me be more consistent with the hx flush and resulting brew temperature. I'm thinking of cutting the display into the machine just below the drip pan. The left side has room and avoids the center drain cup and right side water/power inlets.  This location seems cool enough for the electronics and the pid project box seems water resistent enough to fend off occasional spills from the drip pan.

Cheers!
Steve
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aleks192
Senior Member


Joined: 2 Sep 2010
Posts: 39
Location: Calgary
Expertise: I live coffee

Espresso: Rancilio S26
Grinder: Wega Max 6.4
Roaster: Toastess Popper
Posted Fri Mar 4, 2011, 7:21pm
Subject: Re: The Rancilio S20 Series Thread (S24, S26, S27)
 

SteveZ Said:

Aleks, Seems reasonable. I have my single dose button setup as a quick 2 second preinfusion. After this I wait 10 to 15 seconds and then press the double dose button.  Your method is nice because it would skip the 3 way pressure release step. Someone (homebarista perhaps) mentioned that they believed the slow pressure build up of the S27 rotary pump is similar to a quick preinfusion. I'm thinking that the soak time is too quick be much use but it is a somewhat interesting opinion.

Posted March 4, 2011 link

I got home and figured it out....Rancilio already isolated the solenoid and the motor off the switch, using a double pole single throw switch......Blue powers the motor, red powers the solenoid....unplug the blue and I get line pressure through the group.....All I need is a $2 double single pole single throw switch and I can operate the motor and group solenoid seperately......Switch 1 till I get droplets forming, kick on switch 2, and when done extracting the 2 can be turned off at the same time......Once again, Calgary has failed me and I can't find a 110v 16a double SPST switch anywhere.....


Where did you mount your PID box? I assume you're only using it for the readout and no controller function? Interesting thought.....Can you not just get a digital temp readout that would use the thermistor? Or was this PID really cheap?

 
Rancilio S24 Rotary Red | Wega Max 6.4
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aleks192
Senior Member


Joined: 2 Sep 2010
Posts: 39
Location: Calgary
Expertise: I live coffee

Espresso: Rancilio S26
Grinder: Wega Max 6.4
Roaster: Toastess Popper
Posted Sat Mar 5, 2011, 5:31pm
Subject: Re: The Rancilio S20 Series Thread (S24, S26, S27)
 

And I've confirmed it does work.....I'm doing it manually right now, but I was able to line pressure preinfuse and then kick in the pump......score!

 
Rancilio S24 Rotary Red | Wega Max 6.4
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SteveZ
Senior Member


Joined: 30 Nov 2010
Posts: 24
Location: Littleton, Co
Expertise: I love coffee

Espresso: Rancilio S27
Grinder: Baratza Vario
Posted Sat Mar 5, 2011, 10:15pm
Subject: Re: The Rancilio S20 Series Thread (S24, S26, S27)
 

aleks192 Said:

Where did you mount your PID box? I assume you're only using it for the readout and no controller function? Interesting thought.....Can you not just get a digital temp readout that would use the thermistor? Or was this PID really cheap?

Posted March 4, 2011 link

Right now the PID is in a project box that is sitting on the counter next to the machine. It is strictly a meter only.  I looked for a digital temp readout but at $35 the Auber was cheaper than anything else.  It's useful enough that I'll cut it into the machine sometime soon.  I am still thinking that under the drain pan is my best option.  

aleks192 Said:

And I've confirmed it does work.....I'm doing it manually right now, but I was able to line pressure preinfuse and then kick in the pump......score!

Posted March 4, 2011 link

Sounds like you are enjoying your preinfusion experiment.  Are you to the point where you can see a shot difference?  Please keep us updated.
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CWWang
Senior Member


Joined: 7 Feb 2011
Posts: 61
Location: Florida
Expertise: I love coffee

Espresso: Arrarex Caravel. La Peppina....
Grinder: La San Marco SM91
Posted Sat Mar 5, 2011, 11:28pm
Subject: Re: The Rancilio S20 Series Thread (S24, S26, S27)
 

SteveZ Said:

I bypassed my control board by using a 125v momentary hot water switch from La Marzocco and some high temp wire.  Works well for me.

Posted March 4, 2011 link

This is a clever way to do this. I just fix my hot water problem. The problem is on electrovalve. It is blocked by scale. After I break apart and clean it, it work well.
But before I doing that, I made a big stupid mistake. I use multimeter to check the voltage and "current". When I check the voltage, I found there is no problem with switching on and off. However I want to make sure, I detect the current. Then I saw a spark on the circuit board.  The fuse burned. I replace a new one, But I can not switch off any more. It is turn on all the time......

I still want to fix the circuit board, but there is no sign of burn like yours. I think the easy way is to add a momentary switch like what you did.
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Nathan
Senior Member


Joined: 10 Nov 2010
Posts: 152
Location: Montreal
Expertise: I love coffee

Espresso: Rancilio Silvia v3
Grinder: Vario
Vac Pot: Hario
Posted Mon Mar 7, 2011, 6:28pm
Subject: Re: The Rancilio S20 Series Thread (S24, S26, S27)
 

I just bought a really banged up S27. It's missing panels and the steam knob. I'm going to probably start another thread for the reno, but I wonder if there are other steam knobs which are compatible with the S27 ? My machine is missing most of its panels so it will end up pretty custom, so it might be cool if I the knob was custom as well. I really like the knobs that like this Pavoni.

Click Here (www.espressoparts.com)
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SteveZ
Senior Member


Joined: 30 Nov 2010
Posts: 24
Location: Littleton, Co
Expertise: I love coffee

Espresso: Rancilio S27
Grinder: Baratza Vario
Posted Tue Mar 8, 2011, 5:02pm
Subject: Re: The Rancilio S20 Series Thread (S24, S26, S27)
 

Nathan Said:

I just bought a really banged up S27. It's missing panels and the steam knob. I'm going to probably start another thread for the reno, but I wonder if there are other steam knobs which are compatible with the S27 ? My machine is missing most of its panels so it will end up pretty custom, so it might be cool if I the knob was custom as well. I really like the knobs that like this Pavoni.

Click Here (www.espressoparts.com)

Posted March 7, 2011 link

Congratulations on your purchase! So you talked them down under $300?

How custom are you thinking?  Ever see the Chopper Machine that Tal Fishman of Espresso Smith built from a s26?

EspressoParts is pretty good at knowing when parts will fit other machines. Give them a call.
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