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Old 04-07-2012, 03:16 PM   #1
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Default protein rest causing scorched element

I have been running 4 gallon batches on my stovetop 2 vessel brewery I have linked in my signature.
I recently decided to try 122F protein rests before my sach rest.

During the heating between rests, ONLY when I tried protein rests, my element had serious scorching issues. I noticed this first by the horrid smell coming out of the mash, like burnt rubber. It is a high watt density 2000 watt element, but I have been brewing with it, mashing and boiling, many times before with no residual burning or flavor effect.

The scorching happened twice in a row, both batches having tried protein rests. I brewed again right after without the protein rest, and everything was fine.

It is only while doing protein rests, or more specifically, after the protein rest and while raising the temp to another step, that I had this problem.

Can anyone help me out with some reasons why the protein rest is causing the scorching?

Also what strategy would help me accomplish a protein rest without exposing the element to all the protein gloop that apparently sticks to the element?
I figure I could try multiple hot infusions without recirculating, but I don't wanna do that if possible.



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Old 04-08-2012, 03:45 PM   #2
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Well, has anyone been successful with a protein rest in contact with an electric element? Was the element visually ok after brewing? Want to nail this down so any input would be helpful.



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Old 04-08-2012, 09:17 PM   #3
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Have you tried a ULWD element? Is the element Incoloy (stainless) or zinc?

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Old 04-08-2012, 10:35 PM   #4
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Quote:
Originally Posted by Budzu View Post
Well, has anyone been successful with a protein rest in contact with an electric element? Was the element visually ok after brewing? Want to nail this down so any input would be helpful.
No, that is an interesting question, though. One reason I went with a HERMS is to get quickly to mashout temps without having an element touch my mash.
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Old 04-09-2012, 05:20 PM   #5
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I'm somewhat shooting from the hip with this one, but I'll give you my educated guess. I'm thinking that you are scorching due to decreased flow around the element resulting in localized boiling and the resulting sugar/protein deposits. I don't fire my element during BiaB mashing for this very reason (not bag melting concerns, but scorching concerns) and do infusions for multi-step mashes w/o recirculation. I'm really beginning to consider adding a second vessel to my eBiaB keggle setup to act as a HERMS loop for this very reason.

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Old 04-09-2012, 07:03 PM   #6
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Done many protein rests on my CB20 rig which has a 2KW HD element. Never seen a trace of scorching.

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Old 04-10-2012, 01:34 AM   #7
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yeah its a HWD element. I even run it with a stir plate so I was really doubting the lack of flow, but the second time I burned it I noticed the stir bar had been knocked aside. I must've done that the first time as well. I think I will try it once more.

jkarp, do you do your protein rests at 122? or over 130?

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Old 04-10-2012, 03:09 AM   #8
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120-122 Budzu. It's worth noting that Brutus 20 mashes are quite thin with recirculation however. That could explain why I'm not experiencing any scorching.

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Old 05-07-2012, 02:56 AM   #9
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Very very strange. I usually BIAB with my electric kettle. I typically skip the protein rest altogether, and my beers turn out great. I was brewing a Pale Ale today, and thought I would do a protein rest to see if I could tell the difference. (It's a recipe I've brewed before.) And wouldn't you know it...totally scorched element, nasty burnt smell in wort, and kind of smoky flavor in the hydrometer sample. I'm fermenting out to completion anyway. Maybe it will taste.......interesting. Or like an ash tray. Who knows. But I think we are onto something here.

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Old 05-07-2012, 09:33 PM   #10
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Skip the protein rest.



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