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Controller question

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Controller question

Postby S-Cackalacky » Sat Dec 10, 2016 6:35 am

I have one of those 10KW SCR Chineese controllers that I'm getting ready to install in a box. It's the one with the built in heatsink and fan. I think I already know the answer to this, but would like to get some confirmation before I move ahead to the smoke test.

It has 4 connections as pictured here:
Controller.png


Looking at it from underneath, it appears that the two outermost connections go to the SCR and the two middle connections are tied together on the circuit board. A continuity test seems to confirm this. It shows no continuity between the two outermost connections, but it shows continuity between the two middle connections.

Here's a picture of the circuit board:
Controller 2.png


So, I'm assuming I would connect my black input to the far left and my black output to the far right connections. The red input would go to the middle left and the red output would go to the middle right. Does this sound correct?
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Re: Controller question

Postby kimbodious » Sat Dec 10, 2016 8:50 am

intuitively I would have it the opposite way round - inner two for neutral, outer two for live. I have no experience with that controller nor am I an electrician, just a hunch?
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Re: Controller question

Postby kimbodious » Sat Dec 10, 2016 9:11 am

I think I am incorrect - any image I can find by googling show the inner two connectors for live, outer two for neutral.
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50L Beer keg boiler, 2200W element
Modular SS Pot Still 2"
Modular SS CCVM Reflux Column 2"
Modular SS Gin Head 2"
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Re: Controller question

Postby JayD » Sat Dec 10, 2016 9:28 am

Electronics is not my forte, would help if i could...try youtube.
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Re: Controller question

Postby S-Cackalacky » Sun Dec 11, 2016 12:20 am

No neutral. This is US 240V. I'm using 3 wire 10 gauge - 2 hots (black and red) and ground (green). Any Mercins here used one of these before. My electrical skills have grown just a smidge since I started this hobby, but not enough that I don't still question myself.
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Re: Controller question

Postby S-Cackalacky » Sun Dec 11, 2016 3:59 am

My guess is that, because both lines are 120V hot wires, it really doesn't matter. That is, I should be able to wire both reds to the middle pair of connections, or both blacks and likewise either color to the outer connections. As long as I don't reverse the input/output of one of those pairs, I'm thinking I should be OK either way. That's the assumption I'm going with unless I hear different.

One thing I've never been able to wrap my head around is, how you can have one 120V hot going to the SCR and the other 120V hot basically going directly to the heating element. That is, how does it control the second hot leg of the circuit? I've never really completely understood how US 240V works.
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Re: Controller question

Postby kimbodious » Sun Dec 11, 2016 7:51 am

In Australia we call the black (or blue) coated wire neutral, red (or brown) is active (live) and green (green and yellow) is earth.
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Modular SS Pot Still 2"
Modular SS CCVM Reflux Column 2"
Modular SS Gin Head 2"
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Re: Controller question

Postby Otago Elvis » Sun Dec 11, 2016 10:35 pm

The one's that bite are live :mrgreen:
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Re: Controller question

Postby S-Cackalacky » Sun Dec 11, 2016 11:51 pm

Maybe I should touch them to my tongue. When I was a youngun back in S Cack, I had a goofy friend who would test 9 volt batteries that way.
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Re: Controller question

Postby Otago Elvis » Mon Dec 12, 2016 7:53 am

Do you remember the 9 volt battery joke?

What does a 9 volt battery and your wife's "chocolate starfish" have in common?......you know it's wrong, but your still gonna' put your tongue on it :laughing-rollingyellow:
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Re: Controller question

Postby Swedish Pride » Mon Dec 12, 2016 10:00 pm

just had a look at Jimbos build, looks like he uses both the hot


HDdiagram.png


photo credit Jimbo HD.
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Last edited by JayD on Tue Dec 13, 2016 4:49 am, edited 1 time in total.
Reason: removed link, added diagram.
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Re: Controller question

Postby andy1982 » Wed Jan 11, 2017 7:28 pm

Hey s calackly did u get that wired up as I have the same one and would b good if u had a diagram
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Re: Controller question

Postby S-Cackalacky » Thu Jan 12, 2017 12:08 am

andy1982 wrote:Hey s calackly did u get that wired up as I have the same one and would b good if u had a diagram

I'll see what I can do. It's a very simple build, but may be useful info for some folks. I remember the agony of my first controller build. It may be a few days before I post anything.
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Re: Controller question

Postby bigfoot » Thu Jan 12, 2017 7:34 am

Pm Arnie, he's a sparky and smarter than your average bear.
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