Miller Syncrowave 350

[ryanjones2150]

Miller Syncrowave 350

If I got my hands on a syncrowave, I don't think I could sleep until I got it up and running.

[aero1310]

So I got the 2 hots and the ground. This is what I figured at the time but wanted to ask and make sure before I made a critical mistake. Hopefully I can get back out to my shop sometime this week and see how well this thing works.

Thanks guys, very helpful knowledge.

[Broccoli1]

The wires have been color coded with tape to indicate phase.

It doesn't matter for welders but 3-phase motors need to be properly wired for motor rotation.

[Broccoli1]

I've never had my hands inside one of those machines, so I don't want to lead you astray. Generally, you'll have two hots and a neutral in a 230v application. That third hot might be for wiring your machine to three phase if it's an option. Those jumpers next to the wires should be configured for your input power as well. Surely there is someone that has experience with this machine and can chime in.

1. There is NO neutral in 240v circuit. Line 1, line 2 & GROUND
2. This is a Single phase machine

The previous owner used a 4-wire cord but this machine only requires 3-wires
That is why they capped off one of the wires. Most likely they already had some 4-wire cord on hand.

[H80N]

I know that. I was also told big factories use a 3 phase power source but hook it up as single phase to get the 460v. I am not connecting this to 3 phase. I also have the manual, but it does not answer all the questions I have. This would be a lot simpler if the welder was brand new but it is 25 years old. I'm sure it has been worked on and received a lot of use out of the years. Please read my posts a little more carefully.

Really..?? guess I would have to be a mind reader...

Having hooked up a few dozen Sync's over the years.. and..hearing you refer to 3 phase was quite alarming,,, ALL are Single Phase..(all that I have ever seen anyway).. a 3Ph hookup would let the smoke out in a very dramatic and dangerous way...

[Aeronca41]

Correct-only three wires are needed for a 230 volt machine. You could do as you suggest but the color codes in the wiring would be non-standard (but it will work). Would suggest you just cap off the white wire inside the welder and connect the black wire that is now capped off to the welder terminal that now has the white wire. Same result, but standard Color codes would make it easier for the next guy. You got the colors correct in the CB box.

Just to be clear-the third wire besides the two hots from the 2-pole breaker is the green ground.

[aero1310]

This is a SINGLE PHASE WELDER....!!!! 200-575 vac 1ph (jumper clip selectable)

here is the manual with all of the correct schematics and diagrams to hook it up..

http://www.millerwelds.com/om/o352e_mil.pdf

I know that. I was also told big factories use a 3 phase power source but hook it up as single phase to get the 460v. I am not connecting this to 3 phase. I also have the manual, but it does not answer all the questions I have. This would be a lot simpler if the welder was brand new but it is 25 years old. I'm sure it has been worked on and received a lot of use out of the years. Please read my posts a little more carefully.

[H80N]

Ok awesome. Yeah this baffled me seeing that I got this machine from a pretty big factory. Does it make a difference when its hooked up to a 3-phase power source? Maybe it was replaced at one point in time and someone hooked it up wrong. It be cool if someone else had a picture of there's.

Does anyone know if the color of the different tape used on the wires means anything?

I think ill just switch the white and black in the box for the time being. Sucks, I had to cut open the wire loom extra far just to get that white wire to reach the neutral bus bar. Oh well.

This is a SINGLE PHASE WELDER....!!!! 200-575 vac 1ph (jumper clip selectable)

here is the manual with all of the correct schematics and diagrams to hook it up..

http://www.millerwelds.com/om/o352e_mil.pdf

[aero1310]

Ok awesome. Yeah this baffled me seeing that I got this machine from a pretty big factory. Does it make a difference when its hooked up to a 3-phase power source? Maybe it was replaced at one point in time and someone hooked it up wrong. It be cool if someone else had a picture of there's.

Does anyone know if the color of the different tape used on the wires means anything?

I think ill just switch the white and black in the box for the time being. Sucks, I had to cut open the wire loom extra far just to get that white wire to reach the neutral bus bar. Oh well.

[ryanjones2150]

Miller Syncrowave 350

I've never had my hands inside one of those machines, so I don't want to lead you astray. Generally, you'll have two hots and a neutral in a 230v application. That third hot might be for wiring your machine to three phase if it's an option. Those jumpers next to the wires should be configured for your input power as well. Surely there is someone that has experience with this machine and can chime in.

[Aeronca41]

Correct-only three wires are needed for a 230 volt machine. You could do as you suggest but the color codes in the wiring would be non-standard (but it will work). Would suggest you just cap off the white wire inside the welder and connect the black wire that is now capped off to the welder terminal that now has the white wire. Same result, but standard Color codes would make it easier for the next guy. You got the colors correct in the CB box.

[aero1310]

All Im getting from the circuit diagram is there is 2 hot wires and a ground. The 4th wire is not used?

In the attachment you can see the black wire has a cap on it. In the fuse panel I have the black and red hooked up to the breaker as the hot wires. White goes to common and green to ground.

From what I understand at the moment is right now the machine is just under powered at 115v (hopefully I didn't fry anything.) All I have to do is switch the black wire with the white wire and put a cap on the black wire in the fuse box?

Think that should do the trick? I just want to make sure only three wires are being used.

[ryanjones2150]

Miller Syncrowave 350

Did you look in your manual at the wiring diagram? It should give you the correct wiring schematic for both ends of the input power.

[aero1310]

Back again. Yeah I got lucky. The person that owned it wanted a new one so here I am lol.

So I went and bought a 100amp breaker for the time being. I wired up the red and black to the breaker, white to common, and green to ground as I learned from my research. Got everything hooked up. It turns on but doesn't weld.

When I press down on the mode switch, a buzzing noise sounds. Like some kind of alarm...

After looking at it closer I noticed the black wire is not connected to anything inside the machine.. is that normal? The red and white are hooked up and green to ground.

This machine was set for 480v previously, i set it to 230v.

Ill upload pictures later.

[ryanjones2150]

Pearl beer opener...popping the top on a leinenkugel's...