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Old 10-09-2009, 01:13 PM   #1
JVD_X
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Well, I burned out my heating element. I didn't realize I had a very very slow running mash... welp. During the meltdown, the plastic around the element base melted away and POP went the GFCI.

Plastic everywhere.

I ended up having to do a decoction to get the mash up to temp. That was a pain because I wasn't ready for it and I had never done one before.

With that said... I think I like decoction mashing and plan on trying more in the future!
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Old 10-09-2009, 01:15 PM   #2
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does it still taste good? melting plastic has an odd odor.

 
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Old 10-09-2009, 01:23 PM   #3
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You really really have to setup the tube that it cannot run dry. How did the liquid all run out?
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Old 10-09-2009, 01:30 PM   #4
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Ouch, that stinks. What sort of set up does one need to assure that the element does not run dry?

 
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Old 10-09-2009, 01:38 PM   #5
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Quote:
Originally Posted by JVD_X View Post
Well, I burned out my heating element. I didn't realize I had a very very slow running mash... welp. During the meltdown, the plastic around the element base melted away and POP went the GFCI.

Plastic everywhere.

I ended up having to do a decoction to get the mash up to temp. That was a pain because I wasn't ready for it and I had never done one before.

With that said... I think I like decoction mashing and plan on trying more in the future!
Why was the flow rate so slow? Was it an accident? If you were using well modified malts (almost all malts available here in the US are well modified) decoction doesn't really buy you anything. Decoction is usually only used on poor quality malts. If you decide to do decoction mashing in the future keep an eye on the pH (<5.7) of the mash because it is really easy to extract tannins when decocting.
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Old 10-09-2009, 01:50 PM   #6
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I think the wort supply would have to enter a vertically mounted RIMS tube at the bottom and that would need to be lower than the MLT port. The output has to be higher than the element reaches. What I'm not sure about is if there needs to be some kind of siphon break at the top. I don't think so.
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Old 10-09-2009, 02:47 PM   #7
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Quote:
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You really really have to setup the tube that it cannot run dry. How did the liquid all run out?
I guess it boiled off.
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Old 10-09-2009, 02:48 PM   #8
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Quote:
Originally Posted by Sawdustguy View Post
Why was the flow rate so slow? Was it an accident? If you were using well modified malts (almost all malts available here in the US are well modified) decoction doesn't really buy you anything. Decoction is usually only used on poor quality malts. If you decide to do decoction mashing in the future keep an eye on the pH (<5.7) of the mash because it is really easy to extract tannins when decocting.
I have a false bottom but some grain and rice got through anyhow and clogged in 1/2" out to the pump. I'll keep an eye on the pH the future... I didn't know that. I was using 5.2 buffer so maybe I didn't have a problem.

I have attached a pic...
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Old 10-09-2009, 02:55 PM   #9
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to avoid this in the future can you add a second thermo to measure temps at the heating element that will shut off if it gets above 212? If its difficult to do that I think you can even get a temperature triggered fuse as a failsafe.

 
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Old 10-09-2009, 03:01 PM   #10
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Originally Posted by k1v1116 View Post
to avoid this in the future can you add a second thermo to measure temps at the heating element that will shut off if it gets above 212? If its difficult to do that I think you can even get a temperature triggered fuse as a failsafe.
I wonder if my pid already has this feature...
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