Wiring AC condenser fan motor - another DIY with issues

OK, I'm struggling with this problem and y'all might be able to help. I have posted to alt.hvac, but most of those guys are really not very helpful to homeowners and just tell me to call a tech, and this is a DIY forum so bear with me.
background:
AC quit working, would cut-out after startup. Thermostat was changed no result. Called Tech, who tested everything, put 2lbs of r-22 in it, indicated the condenser fan motor was giving trouble starting and that likely it had some bad windings or something. Cutting out was b/ c the fan was not working and the compressor would hit the overheat limit and cut out. He tried changing the capacitor, no improvement. Wrote an estimate for changing the motor out of over $500. Being thrifty and handy enough to be dangerous, I decided this was too much for something I could do myself.
I looked around and after getting the details on what the motor type was, I found a OEM replacement at Grainger. 1/4 horse, 220 volt, Y frame, counter clockwise rotation, sealed air-over, bottom shaft, etc. I got the motor changed out, substituted the new 12mfd capacitor that this motor required (vs the 5 mfd for the other). I took pains to connect the wires back just as it was before. The new motor had the same colors leads as the old one, a purple, a brown and a black.
As I tested it, I discovered that this motor does not want to start either, in fact it makes the same loud humming noise when energized. When I spun the motor with a stick through the grill and it caught on and ran normally. Hmm.... The compressor runs strong and has no issues.
After looking at the way it had been wired when I opened the case, their are two hot 220 leads and the case is ground. Going from either lead to ground is 115 volts. Obviously between the two leads is 220-250 volts.
Of these two hots, one BLACK HOT wire goes to the contactor (relay) switch and then would connect to the purple fan motor wire when energized.
The WHITE HOT connects to a wire that goes to a 3 way capacitor (runs the compressor), with a jumper directly from the input terminal sending power also to the condenser fan motor capacitor.
The other two condenser fan motor leads, the brown and black, are connected to the starting capacitor, one on one side and one on the other. The black is connected to the same terminal as the hot lead.
--


Ok, I thought about it, and using my limited knowledge I figured the
motor has two seprate windings for each hot leg, and by only having
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Now you know why it was $500
The HVAC tech knew how to properly install a 'simple' motor that 'any' homeowner can do... which now, it ends up being 'not so simple'.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Thanks for the helpful information. I really appreciate your knowlegable advice.
A guy at work indicated I could turn over the fan blade - LOL
I think after talking with some folks its the polarity of the starting cap, I need to try it with the terminals switched as it seemed to start fine going the wrong way, so perhaps the cap boost was not getting to the motor the way it was wired. Hope that's all that's needed. Must be a simple problem.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

quoted text -

No problem...

If he actually believes this... he's not very knowledgeable.

Guess again, the run cap isn't polarized!!!
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
The motor may have been designed to operate in the reverse rotation, or perhaps there is an alternate way to chose the windings so as to make it run in the opposite direction.
Smarty

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Thanks folks, got it working!! I found the jumper the unit had to connect the capacitor - one connector fell off! I put a new one on. The power connection must not have been all that good. Now its rotating proper direction and the downstairs is getting cool again!
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Scott wrote:

    Based upon the motor you said you were going to purchase (4MB69), it is a reversible motor. The instructions should tell you how to install the motor with regard to wiring it as well as reversing the rotation. Do you have instructions??? Look on the motor if not.

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.