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Old 08-13-2010, 06:20 AM   #1
southpawbrew
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Default Wiring a 220 LWD Heating element run at 110

I was wiring up my new tri-clover RIMS from Brewer's Hardware and I changed from a LWD 110 heating element to a LWD 220 element that I am running on 110. I built a control box straight copied from Boerderij_Kabouter click here to see it

The weird problem that came up was the PID reads say 70 then when I have the element off then when I switch on the element it will drop instantly to say 51. Nothing else changed. I went through the box to make sure nothing was out of place.

Any suggestions on where I should check or changes in the wiring I need to do?

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Old 08-13-2010, 10:21 AM   #2
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sounds like a grounding issue with your thermocouple or at least some type of interference is being created when power. Did it you have this up and running with the original element in place?

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Old 08-13-2010, 12:03 PM   #3
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Are you sure you don't have your Thermocouple wired to the PID backwards?

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Old 08-13-2010, 12:58 PM   #4
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Note that he is using an RTD, not a plain ol' 2-wire thermocouple. There is a difference between the wiring that you have to consider if you aren't using an RTD.

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Old 08-13-2010, 02:27 PM   #5
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Yeah I should have noted the use of the rtd. One difference i didn't think about in the op is: On the new rims tube there is a ground post right on the tube. I wired ground to the post then put a jumper from the ground post to a stainless nut and bolt on the box. Problem? Better way?

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Old 08-13-2010, 02:41 PM   #6
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Quote:
Originally Posted by southpawbrew View Post
Yeah I should have noted the use of the rtd. One difference i didn't think about in the op is: On the new rims tube there is a ground post right on the tube. I wired ground to the post then put a jumper from the ground post to a stainless nut and bolt on the box. Problem? Better way?
I would make sure that there is an actual ground conductor from your incoming power also terminated under the same SS nut on your box. I don't like relying on an enclosure as part of the ground circuit. It should be grounded, yes. But not "in series" like earth ground terminating at point "A" on the box, then another device getting its ground connection from point "B" on the box.... I don't know if that makes any sense or not.
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Old 08-13-2010, 09:57 PM   #7
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Reset the connections on the RTD today and bingo no temp reading jumps. One of the connections on the RTD must not have been fully set. Not sure why giving power to element made it jump up and then down when the switch was turned off. But tt's up and running now and best not to ask to many questions. As long as it doesn't repeat.

After a few more things are finished I post a thread on the build showing the box and the incredible tri-clover rims tube from Derrin at Brewer's Hardware. His craftsmanship is superb. It really is the sweetest part of my brew rig now.

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Old 08-13-2010, 10:20 PM   #8
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Quote:
Originally Posted by southpawbrew View Post
Reset the connections on the RTD today and bingo no temp reading jumps. One of the connections on the RTD must not have been fully set. Not sure why giving power to element made it jump up and then down when the switch was turned off. But tt's up and running now and best not to ask to many questions. As long as it doesn't repeat.

After a few more things are finished I post a thread on the build showing the box and the incredible tri-clover rims tube from Derrin at Brewer's Hardware. His craftsmanship is superb. It really is the sweetest part of my brew rig now.
I'm really interested in that RIMs tube. Did you pattern yours after any other build thread here? Please get some notes and pics on that specifically if you don't mind. Thanks.

[edit] woops, just went back and saw B_K did a rims as well.
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Old 08-13-2010, 10:54 PM   #9
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Originally Posted by passedpawn View Post
I'm really interested in that RIMs tube. Did you pattern yours after any other build thread here? Please get some notes and pics on that specifically if you don't mind. Thanks.

[edit] woops, just went back and saw B_K did a rims as well.
My original intention was to attach it directly to the control box. But with the ability to break the tri-clover down and thoroughly clean it I now have a space for it in front of the box. The weight and tri-clover clamps themselves keep it in place pretty well. This is just a low quality shot of the box and rims tube. When I get it all dialed in I'll put up a full thread with pics, notes and such.
i_2010081315470682.jpg  
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Old 08-13-2010, 11:00 PM   #10
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That's a pretty effin sweet box.

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