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Old 02-02-2014, 02:35 PM   #1
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Default DIN Contactor Wiring

I have these two contractors (http://www.ebrewsupply.com/63a-din-contactor.html and http://www.ebrewsupply.com/25a-din-contactor.html) for main power and power to the element.

I am struggling on how to wire these. What do the numbers represent, and which numbers get the 220v input power. Also on the kit diagram I'm working from it shows that one of the 110v legs is being jumped to what I assume is the coil (not sure if it should be the A1 or A2 side) does it matter which hot leg I jump?

This is the diagram from the kit I am working with.
http://www.ebrewsupply.com/designs/P...ctric-BIAB.pdf

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Old 02-02-2014, 03:59 PM   #2
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According to the diagram on the face of the contactor, the A1 and A2 coil inputs are for your black and white 120v wires, 1 and 2 are the switch outputs for one leg of your 240v (eg. red), and 3 and 4 are the other leg of your 240v (eg. black).

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Old 02-02-2014, 05:50 PM   #3
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I guess I just don't understand what this device is doing, especially the coil. Having one of the hot legs jumped over to the coil sounds like it goes against what you said.


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Old 02-02-2014, 06:11 PM   #4
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You run each hot leg into the line side of the contactor, and out the load side of the contactor. The coil operates at 120v, so you run one hot to it, and the neutral to the other side. Since it is a normally open contactor, when the coil is not energized, no power runs from line side to load side. When the coil is energized, the circuit closes and power runs from line side to load side for both hot legs.

You control the power to the coil with a switch. I suspect the 63a contactor is for your "main power" switch, and the 25a contactor is for an element switch. When main power switch is off, you have no power from the load side of the 63a contactor to the rest of your panel. When the element switch is off, you have no power from the load side of the 25a contactor to your element.

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Old 02-02-2014, 06:24 PM   #5
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Thanks Jeff that helps a lot.

Is the line side inputs (from power source) #2 and #4 and the load side (to the breaker/element) #1 & #3?

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Old 02-02-2014, 07:02 PM   #6
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Quote:
Originally Posted by OatStraw View Post
Thanks Jeff that helps a lot.

Is the line side inputs (from power source) #2 and #4 and the load side (to the breaker/element) #1 & #3?
I don't think it matters, as long as you connect one hot to 1 & 2, and the other hot to 3 & 4. The coil will be opening and closing a 1-2 circuit and a 3-4 circuit, and direction shouldn't matter for an AC circuit.

As always, I am not an electrician.
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Old 02-02-2014, 07:04 PM   #7
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It doesn't really matter. You can use 1 and 3 as an input, 2 and 4 as an output or vice versus.

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Old 02-02-2014, 07:05 PM   #8
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Awesome! Thanks guys that helps a ton.


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