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Old 07-18-2011, 02:30 AM   #1
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Default Analog JC from cold to hot

Is there a way convert an analog JC from cold to hot?

Thanks



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Old 07-18-2011, 02:36 AM   #2
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Is there a way convert an analogy JC from cold to hot?

Thanks
??????

What?


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Old 07-18-2011, 02:41 AM   #3
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My temperature controller if I plug it in to the fridge it lowers it to a certain temperature.

http://www.winning-homebrew.com/images/johnsoncontrolsanalogtempcontroller.jpg

I want to be able to use it in the winter and plug a light in to warm up my fermentation chamber. So can I convert it from cooling to heating?

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Old 07-18-2011, 02:42 AM   #4
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??????

What?
I'm guesing Johnson controller. Don't they have a NO and NC contact on the relay so it is basically which one you connect to determines whether it is for cooling or heating - don't quote me on that!
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Old 07-18-2011, 02:55 AM   #5
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Johnson controller.
That explains a lot. The OP 'AJC16' asked a question about an 'analog JC'.

Sorry for getting old and senile. I had not a clue so I figured?

I'm done...

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Old 07-18-2011, 02:59 AM   #6
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Originally Posted by P-J View Post
Johnson controller.
That explains a lot. The OP 'AJC16' asked a question about an 'analog JC'.

Sorry for getting old and senile. I had not a clue so I figured?

I'm done...
No no no PJ, you are not getting old or senile (well at least not are far as I can tell from behind my computer screen . I am just completly taking a stab in the dark that is what he (or she) meant!
That is really the only thing I can think of that is analogue and has to do with homebrewing with the initials JC.
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Old 07-18-2011, 02:21 PM   #7
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??????

What?
I was right there with you, buddy.
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Old 07-18-2011, 03:22 PM   #8
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Is there a way convert an analog JC from cold to hot?

Thanks
Yes. The analog Johnson controllers typically have an internal double throw switch. There are three terminals on the switch. The center one is usually covered with a small plastic plug which is easily removed. Move the Black wire from the top terminal to the center terminal and put the plug in the now vacant top terminal. This will result in the switch turning on with a temperature drop for heating use. This is not explained in the users manual. I have seen at least on analog Johnson (a vintage one) that used a single throw switch, but all of the more recent models have the double throw type.
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Old 07-18-2011, 04:40 PM   #9
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Thanks for all of the help!

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Old 07-18-2011, 08:08 PM   #10
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Did it and it works great! Made life easier for fermentation in my garage in the winter.



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