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Robbins & Myers single speed wiring diagram


Robert Kennedy

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I have a 1920's - 1930's R&M single speed fan that I need the wiring diagram for. It was "direct" wired when I bought it, bypassing the on/off switch.....so basically you just plug it in and away you go! I need the diagram showing how the head wires connect to both the switch and the plug-in. 

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One line of the headwire goes directly to the line cord. The other line goes to switch when in the on positions. The other line cord goes to the other hot terminal on the switch 

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11 hours ago, Lawrence Smith said:

One line of the headwire goes directly to the line cord. The other line goes to switch when in the on positions. The other line cord goes to the other hot terminal on the switch 

What Lawrence said…. All I would add is that it’s best practice to switch the hot leg of the power cord. Not the neutral.  Depending on your power cord the hot side is usually denoted by the narrower plug blade, or a black conductor insulation, a line on the conductor, or a lack of ridges on the insulation (smooth) 

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On 1/5/2023 at 9:35 AM, Robert Kennedy said:

Thanks Lawrence and Lane.....I appreciate your input.

That worked great Lawrence.....there wasn't much wire to work with on one side if the windings....appx 5 strands with no insulation. The head gets fairly warm after only 2-3 minutes of running and the single speed just doesn't seem right.....should spin up faster in my own opinion....your thoughts?

 

On 1/5/2023 at 9:35 AM, Robert Kennedy said:

 

 

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3 minutes ago, Robert Kennedy said:

That worked great Lawrence.....there wasn't much wire to work with on one side if the windings....appx 5 strands with no insulation. The head gets fairly warm after only 2-3 minutes of running and the single speed just doesn't seem right.....should spin up faster in my own opinion....your thoughts?

 

 

 

Fan 1.msg Fan 2.msg

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Have a pic of the fan? Shaded pole type motors do tend to run hot. Not so hot that they smoke or have a burning smell, but very hot to the touch. There are many shaded pole motor fans that it’s uncomfortable to hold the motor tightly for very long. 
 

buy a Kill a Watt meter on Amazon for $20. That’ll tell you it’s running amps. Compare that with the motor tag.  If it’s within spec, or close, it should be ok.  If not, the stator might be bad. It seems that someone has already monkeyed with it before your ownership, so who knows. 

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FYI, it would serve you best to simply continue posts on the same thread regarding the same fan. Otherwise it gets confusing for those trying to help you and clutters the forum.  It doesn’t matter if it’s a different question you have. The members will see it. 

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6 hours ago, Lane Shirey said:

FYI, it would serve you best to simply continue posts on the same thread regarding the same fan. Otherwise it gets confusing for those trying to help you and clutters the forum.  It doesn’t matter if it’s a different question you have. The members will see it. 

OK, thank you Lane

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