"New" Speedaire - Rewire advice

[skelrad]

For only $150, I thought it was worth the work (just needs a little TLC):

[URL=http://s913.photobucket.com/user/bryostdc/media/Compressor005.jpg.html] [/URL]

[URL=http://s913.photobucket.com/user/bryostdc/media/Compressor004.jpg.html] [/URL]

What I need is a little guidance on how to switch this over from 110v to 220v. The motor itself has a little diagram that shows that you just need to swap two wires and plug them into a different place, but the pressure switch has me confused. How do I switch this over? Seems like I'll have one too many wires when I go to 10/3. A little help?

[URL=http://s913.photobucket.com/user/bryostdc/media/Compressor001.jpg.html] [/URL]

 

[rdsk8ter]

you should be fine just the way it is right now the way it is set up it is breaking both the hot and neutral. Either use the cord neutral as a hot (220 loads rarely need a neutral) or replace the cord. Just switch the motor side and the cord end side.

 

[awdblazer]

that looks like 3 phase

 

[All]

Was that base plate re-welded to the tank?

 

[skelrad]

Was that base plate re-welded to the tank?

Yeah, I'm pretty sure this isn't the original tank. I asked the guy about it, but he wasn't the original owner so wasn't sure what the deal was with it. Regardless of the history, I didn't care if it was the original tank as long as it was a decent one. It's listed as a 1959 made in Milwaukee and rated to 160 psi (which is more than I need out of a 30ish gallon unit).

 

[skelrad]

you should be fine just the way it is right now the way it is set up it is breaking both the hot and neutral. Either use the cord neutral as a hot (220 loads rarely need a neutral) or replace the cord. Just switch the motor side and the cord end side.

Sorry, I'm no electrician. Are you saying I can just replace the plug, switch the motor over and call it a day?

 

[zkling]

You should be fine as long as you switch the motor over. The pressure switch is just that, a switch, independent of voltage, but based on wattage.

It should have two in (live), two out (motor), being a double pole throw motor start switch. It is wired properly now. Then the ground (green or bare) should be grounded to the box.


Edit, congrats on finally getting it, I remember your original post. What size (Volt and AMP) motor is on there?

 

[skelrad]

Edit, congrats on finally getting it, I remember your original post. What size (Volt and AMP) motor is on there?

Yeah, I was pumped to finally find a good old compressor! I travel so much for work that I kept missing out on the deals, but as luck would have it my absence ended up meaning $100 off of the original asking price for this compressor since it hadn't sold. I plugged it into 110 for a few minutes before I bought it to hear it run, and it's amazingly quiet! I just need to rewire it, add a tank pressure guage and an in-line regulator and filter and I should be good to go.

If I can ever open up the big plugs on the back and verify that the tank will be good for quite a while longer, I might take it on as a winter restoration project. The pump is in amazingly good shape, so hitting it with a little electrolysis and some new paint would create an awfully nice machine.

I'm too lazy to run out to the garage to get the exact numbers, but I think the motor is a Dayton 2 hp. At 230v it draws something like 11 amps. It's also rated for continuous operation.

 

[awdblazer]

is it single phase or 3 phase?

 

[skelrad]

is it single phase or 3 phase?

Single phase

 

[skelrad]

So I got the garage and the compressor rewired and it fires up like a champ! I love how quiet the thing is. I've fixed a couple of leaks (I don't think the fittings have been touched since the pump was built 50 years ago!) and am now in the tweaking stage.

Can someone tell me how to set the shutoff range for the pump/motor? I'm assuming it has something to do with the two spring screws on the switch, but I don't know the proper procedure for getting it set correctly. The tank is rated for 160 psi. What would be an appropriate range to set the switch at? I was thinking on at 110 and off at 140, or something like that.

The last thing I have to figure out is what is causing the vibration when the pump runs. It's pretty noticeable, although the pulley seems tight and tracks true. I'll probably use it as-is for a while then tear it down this winter and do a rebuild on it.

All in all, for $150, I love it!

 

[kenfain]

Pressure switch setting instructions are typically on a decal, on the inside of the cover you took off to get to the wiring. Was there a cover? If not it's not complicated. Maybe someone will post a picture,or instructions. If not I'll tap it out on this tiny little keyboard on my phone. I'll check back later

 

[G_P]

What is the max PSI of the pump?

Thats a single stage pump so I would doubt you will see over 120-125 PSI max out of it.

Try 90 on 120 off.