Contactor wiring

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  #1  
Old 07-01-14, 10:23 AM
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Contactor wiring

Hey folks!

First off, thanks to those who replied to my last thread (http://www.doityourself.com/forum/ai...r-ac-unit.html). My work schedule is such that I forgot about it for a while, and there's no sense in bumping an old thread just for a thank you, so here it is - THANK YOU!

Anyway, on to the topic at hand. The replacement contactor came in yesterday so I'm planning on installing it as soon as this blasted rain stops. I was wondering if someone here would be so kind as to give me a sort of wiring diagram for the replacement process. All of the guides and such I can find contain terms like "take the low voltage wire" and such, which means very little to someone like me who knows little about wiring.

I have included some pictures. It would be easiest for me if someone could make it as simple as editing in numbers on the terminals/wires so it's as easy as connecting 1 to 1 and so on, but any help is much appreciated.

Thanks so much in advance. Hopefully with your help I can finally fix this.

Cheers

I also have additional pictures I can upload if these aren't detailed enough.

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Old 07-01-14, 10:37 AM
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The right side of the old contactor is hard to make out. Can you take a pic from the side?
 

Last edited by skaggsje; 07-01-14 at 10:39 AM. Reason: more info
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Old 07-01-14, 11:03 AM
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I hope these are good enough.
 
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Old 07-01-14, 11:57 AM
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Yes that pic helps alot. Black wire goes to L2.
White wire goes to L1
2 Orange wires to T2
This is where it might get a little tricky, the old contactor has 3 slip connectors for the red wires, the new contactor only has 2. The new one has set screws, so you will have to look at it and see if it has a place to slide the 3rd red wire in and tighten. The 3 reds will go T1.

The 2 blue wires are your 24V from stat. You land these blues on the side terminals. 1 one each side. Doesn't mater which blue goes on which side.
 
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Old 07-01-14, 01:25 PM
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Awesome. Thanks so much for your help. Now if only this rain would stop...
 
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Old 07-01-14, 02:30 PM
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Talking

I would keep the two smaller red wires (red arrows) clipped onto the new contactor.
Cut the terminal off the big red wire (purple arrow) and put that wire in the set screw lug.

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Old 07-01-14, 04:41 PM
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There's a small black wire currently connected to the old L1. Can I assume this should go onto the L1 on the new contactor as well? I only ask because it's black, which doesn't match the other wire in the L1 spot, and thus skaggsje's instructions.
Colored green in this image for clarity as it's hard to see in the original image.
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Old 07-01-14, 04:52 PM
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Ok I see it now, yes connect with the large white wire. By the way, I"m curious why there is two capacitor's ? Can you post the model number and make of this unit?
 
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Old 07-01-14, 06:04 PM
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I was curious about the two caps also. I've never seen one wired like the one on the left. The black wire goes to line L1 and the red goes to T1. Not sure where the brown is going. I see the bleeder resistor between the black and brown is almost gone. This wiring makes no sense.

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Old 07-01-14, 06:28 PM
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Whether it makes sense or not, the advice you folks gave me worked. The new contactor is in and working fine so far. Thank you very much for your help. Saved me a small fortune in HVAC repairman fees.
 
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