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post #1 of (permalink) Old 11-27-2002, 06:37 PM Thread Starter
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Square D pressure Switch help!

Hi I picked up a square d pressure switch and am almost done the oba. only thing is the pressure switch has no directions. I dont know how to wire it. If you take off the cover the are 4 terminals L1 T1 T2 L2 what one of these do I use? I need 1 to go to the wire on the compressor and then 1 to go to my switch in the dash. but there are 4. please help. thanks Mike
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post #2 of (permalink) Old 11-27-2002, 07:29 PM
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Re: Square D pressure Switch help!

L1 will connect inside the switch to T1, and L2 will connect to T2. 'L' terminals are normally used for 'Line', the incoming current, and 'T' terminals for the load. In a DC circuit, it doesn't really matter.

You can use either set. If the contacts go bad, you can switch to the other set. That's good because that is probably an AC-rated switch, and the contacts might not last very long switching DC.
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post #3 of (permalink) Old 11-27-2002, 07:34 PM
 
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Re: Square D pressure Switch help!

Your in luck I just had to replace the one on my well so here ya go. [img]images/graemlins/smile.gif[/img]
The red lines are how you would wire it. [img]images/graemlins/wink.gif[/img]
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post #4 of (permalink) Old 11-27-2002, 07:50 PM Thread Starter
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Re: Square D pressure Switch help!

the directions say L1 and L2 Together and then The T1 and T2 together. so I am going to do that, then have L's go to switch and then the T's go to the compressor.

Also if anyone knows what kind of oil to put in a york out of an 80's wagoneer that would be great. I just took out the fill plug and stuck something in there and it seems real low.

Mike
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post #5 of (permalink) Old 11-27-2002, 08:05 PM
 
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Re: Square D pressure Switch help!

Remeber you are using this switch for D/C voltage instead of A/C voltage and your running a 12 volt clutch not a A/C motor. The switch is made for 220 v A/C so it has 2 separate sets of contacts for 2 lines(power wires). You have 12 volt and only have 1 power instead of 2 and ground is already there so you only need to use 1 side of the switch. So as it was said if you ever have problems you can move the wires to the other side. The way I showed in the pic is the correct way to wire it for what you are doing. There is no reason to run the ground through the switch.
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post #6 of (permalink) Old 11-27-2002, 08:26 PM
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Re: Square D pressure Switch help!

</font><blockquote><font class="small">In reply to:</font><hr />
the directions say L1 and L2 Together and

[/ QUOTE ]Where did you get directions? I thought you didn't have any.
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post #7 of (permalink) Old 11-27-2002, 08:39 PM Thread Starter
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Re: Square D pressure Switch help!

talking about the directions that in2mud posted. Ok I see what you mean now about it being ac and the jeep is dc. thanks Mike
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post #8 of (permalink) Old 11-27-2002, 09:05 PM
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Re: Square D pressure Switch help!

The ones in the posted image do not say that L1 and L2 go together but it looks like you're following that now. Don't worry about the ratings, there is a voltage rating which is based on insulation breakdown, then there is a current rating for AC and a lower one for DC. Running a clutch on it you shouldn't have any problem.
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post #9 of (permalink) Old 11-28-2002, 04:23 AM
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Re: Square D pressure Switch help!

[img]images/graemlins/tongue.gif[/img] I always used 10W oil in my Yorks and they went thousands of hours with no trouble. [img]images/graemlins/crazy.gif[/img]
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post #10 of (permalink) Old 11-28-2002, 04:28 AM
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Re: Square D pressure Switch help!

[img]images/graemlins/cool.gif[/img] If you want to be [img]images/graemlins/cool.gif[/img] about it, you can use L1 for the feed and also connect L1 to L2 so you are feeding both L1 and L2. Then use T1 to feed the clutch and T2 to feed back to an indicator lamp so you know when the switch is calling for the compressor to run. The lamp will be lit when the compressor clutch is energized. [img]images/graemlins/cool.gif[/img]
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