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Old 07-02-2008, 04:11 AM   #1
mongrell
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Default Ranco Electronic Temperature Control

So I bought a Ranco one-stage electronic temperature control and didn't expect that I had to wire it myself. Well I'm dumb and don't know what NC NO or anything else I see inside this thing means... has anyone else ever wired one of these who could explain it to me? Even just an image of yours opened up so I could follow the wires would help.


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Old 07-02-2008, 04:16 AM   #2
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http://www.zymico.com/thermostat.shtml

http://www.brewboard.com/index.php?showtopic=40898

I believe this will work for you.


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Old 07-02-2008, 02:10 PM   #3
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NC-Normally Closed - In a non-powered condition the relay contacts are closed. It takes power to to open them. Usually used in safety circuits such as E-Stops. The idea is that if power is lost or the circuit fails then the contacts do not open and cause machinery/equipment to act unexpectantly.
NO-Normally Open - In a non-powered condition the relay contacts are open. It takes power to close them.
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Old 07-02-2008, 03:21 PM   #4
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I'm getting ready to do this too. In those pictures, which orange wire goes to which end? Or does it even matter? I would think the wire on the left is the end that plugs into the wall and the one on the right is the one you plug into the fridge. Is that right?
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Old 07-02-2008, 03:31 PM   #5
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check you pm
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Old 07-02-2008, 04:59 PM   #6
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Quote:
Originally Posted by IrregularPulse View Post
NC-Normally Closed - In a non-powered condition the relay contacts are closed. It takes power to to open them. Usually used in safety circuits such as E-Stops. The idea is that if power is lost or the circuit fails then the contacts do not open and cause machinery/equipment to act unexpectantly....
Actually with a NC connection, if power is lost, the contacts close allowing power to flow. For a safety circuit you would want NO contacts (preferably force guided), unless it is an E-Stop switch, then it would be NC contacts that would open when the switch is pressed.
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Old 07-02-2008, 07:25 PM   #7
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I just did this 2 nights ago. Used the link from the brewboard and everything went fine. Hardest part was getting the wires into the tiny holes. Cursed these meathooks I call hands!

Now my Dortmunder is nice and chilly at a stable 49F. No more ice bottles for me!
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Old 07-03-2008, 06:57 PM   #8
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Quote:
Originally Posted by ajwillys View Post
I'm getting ready to do this too. In those pictures, which orange wire goes to which end? Or does it even matter? I would think the wire on the left is the end that plugs into the wall and the one on the right is the one you plug into the fridge. Is that right?
Does anyone have an answer for this? I'm curious the same.
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Old 07-03-2008, 07:01 PM   #9
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Quote:
Originally Posted by ajwillys View Post
I'm getting ready to do this too. In those pictures, which orange wire goes to which end? Or does it even matter? I would think the wire on the left is the end that plugs into the wall and the one on the right is the one you plug into the fridge. Is that right?
Opposite. The load (fridge) is on the left. The piece on the right plugs into the wall.
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Old 07-06-2008, 12:20 AM   #10
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Quote:
Originally Posted by mongrell View Post
Does anyone have an answer for this? I'm curious the same.
He's right, it's opposite. This picture was helpful for me. I did it like this and it works.

http://www.homebrewtalk.com/gallery/...50&ppuser=4083


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