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Offline Algiz  
#1 Posted : Monday, October 28, 2013 12:49:33 PM(UTC)
Algiz


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I am running a PSll pot still for the first time today. I ran a stripping run and am running a spirit run now. I know the temp alcohol boils at is 173, I am not getting any output until it reaches 184 degrees. My thermometer is at the top of the column. Is this normal, or am I doing something wrong? The output is coming out at 75% ABV
Offline cczero  
#2 Posted : Tuesday, October 29, 2013 9:52:28 AM(UTC)
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I ran a spirit run today on 4 gals of 30 ABV wash and got 15 pints of output ranging from 91 to 89 ABV at a temp of 173-175. What were you expecting to get? I usually measure the output ABV from the stripping runs and know about what I expect to get as output from the spirit run and am pretty close in my calculations. I retrieved 228 ounces of alcohol from the input. I have the PSII and have run many stripping/spirit runs. What was the result of your stripping run?
Offline Algiz  
#3 Posted : Tuesday, October 29, 2013 10:15:28 AM(UTC)
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I wasnt complaining about output. Im getting goooutlut bht it is running hotterbthan i expected. I dont get any output until it reaches 183
Offline cczero  
#4 Posted : Tuesday, October 29, 2013 10:26:32 AM(UTC)
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I'm using a digital thermometer and usually start seeing output around 140-150. I wonder if maybe the thermometer you're using isn't reading correctly. At what temp did you finally shut the stripping run down? I stop mine (stripping) when the ABV drops below 70 or the temp climbs above 206.
Offline cczero  
#5 Posted : Tuesday, October 29, 2013 10:53:37 AM(UTC)
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While walking my dogs and thinking about your problem, I wonder if it has to do with your water supply. I use 2 separate 55 gal barrels when doing my spirit runs with 2 water pumps. What temp is the water to the column tower and when do you you start the water pump? John Barrlycorn has a good post on running reflux. http://www.brewhausforum...?3144-Finally-a-good-run . You might want to read his technique.
Offline googe  
#6 Posted : Tuesday, October 29, 2013 11:12:19 AM(UTC)
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Forget your thermo, run it by heat input, broken stream is a good output for a pot. Temps just confuse you unnecessary which is why your posting this question ;-)
Offline Algiz  
#7 Posted : Wednesday, October 30, 2013 12:31:44 AM(UTC)
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Thanks for all the replies. Googe, I pretty much did as you suggested. I ran it slow. got good results in my output. I disregarded the thermometer, and ran it by how much I was getting out. It ran about 8 oz every 15 minutes with a broken stream
Offline wiskeyfront  
#8 Posted : Wednesday, October 30, 2013 9:32:10 AM(UTC)
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I had my second run on the 28th. I started producing around 158. I backed the flame as low as I could and still maintain a slight flow. I introduced minimal tower cooling and was 160 for an 18 minute pint. Very Exciting. The product started at 180 and dropped to 165 when I stopped. I charcoal filtered it and cut it to 110. My wife thinks I should cut it a bit more. LOL
Offline Farmin in the woods  
#9 Posted : Wednesday, November 06, 2013 3:55:33 PM(UTC)
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i used the supplied digital thermometer with my PSII and the temps shown gave me the rigors!! I tested my cheapo thermometer in boiling water and the meter was WAAAAYYY off. I call brewhouse and they promtly sent another one...which was as bad as the first. Now I have marked the valve on my pot as to the correct setting for heat and run it by output. Actually, the thermometer broke a while back, i use the metal rod as a plug for the rubber stopper. I find it works fine and is one less thing to worry about.
Farmin
Offline John Barleycorn  
#10 Posted : Friday, November 08, 2013 2:50:01 AM(UTC)
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Quote:
I backed the flame as low as I could and still maintain a slight flow. I introduced minimal tower cooling and was 160 for an 18 minute pint. Very Exciting.

You're definitely on the right track. Now bump up your energy input a bit more and use a bit more cooling water to maintain the _same_ _slow_ collection rate. This will give you a higher reflux ratio ... and you'll get a higher abv. The trick is to avoid driving your column too hard where things get smeared. You'll eventually find your sweet spot.

The only other thing not to forget: Once you get some steady output at the beginning of your run, open up your cooling water so you get zero output. Then let it sit like that for at least 30 minutes. When you start collecting, your collection rate should be almost painfully slow until your nose tells you things are clean. This will help compress the heads.

Regards,
--JB
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