[ogre2011]

I have the following:

FASCO motor D7908
6 wires total: (As it is stated on motor sticker"
purple and yellow are set up for rotation of motor

WHITE : COM
BLACK : LINE
BROWN : CAPACITOR
BROWN/WHITE : CAPACITOR


GE Capacitor 97F9895

3 sets of prongs:

"C"ommon has four prongs
"HERM"itic has 3 prongs
"FAN"

I just need to know which wires from motor plugs onto which prongs for capacitor.

My house is at almost 90 degrees and I have no air so in other words...PLEASE HELP!!!! My fiance' is getting awnry!!!:furious:

Thanks in advance!!!!

 

[hvactech126]

did you get a new capacitor for the motor? The capacitor you describe is a dual-run capacitor for both fan and compressor. When replacing a motor ALWAYS replace the capacitor as well. Often new motors require a different value capacitor than the original.

 

[Marty S.]

Best to use a seperate capacitor as stated. For now though hook the brown to the fan and tape off the brown with white stripe.

 

[ogre2011]

Did not

It is the same exact motor and capacitor set up....problem is, a friend came over to remove motor to go get a new one for me while I was at work and he did not bother checking what went where.

 

[hvactech126]

is it a new capacitor?! The motor is obviously aftermarket due to reversible rotation. Check the label on the new motor for the required capacitor. Then check the capacitor for its value rating on the label should be similar to 35/5 or 35+5.

 

[ogre2011]

I replaced the motor with the same exact one that came out of it and the capacitor that was in the HVAC unit is the one that ran the old motor.

 

[hvactech126]

great, go get a new capacitor so you don't ruin the new motor. But I would still look on the motor label for the required capacitor value and get the correct size one required for the motor. If you want it to run right now

white to com on capacitor
black to contactor (opposite side than the one connecting the contactor to the com terminal)
brown to fan on capacitor
brown/white - tape and cap off.

 

[ogre2011]

Ok, I can get one tommorrow, it is 845pm here and my house is still at 83 degrees.

If I get a new capacitor, I am guessing it will be one with only 2 sides with four prongs each. In that case, what wires need to go where?

 

[hvactech126]

black to contactor
white to other side of contactor
brown to capacitor
brown/white to other side of capacitor

 

[ogre2011]

Ok, thanks for the info.

Just curious, why is there 2 brown wires if one of them is useless?

The motor is a "split capacitor" type motor, so what does that mean?

 

[hvactech126]

its not useless, it is used when there is a standard single run capacitor used for the fan only. I just gave you that information where both brown wires are used.

 

[ogre2011]

Guess I was just confused since using the old capacitor I would only use the solid brown wire and not both it and the BR/WH wire like the old one had used on the same capacitor.

IF I can get a capacitor that is the right size can I wire it as so, run the white wire through the original COM on the old capacitor as to not have to disconnect the other 4 wires that are attached and just run the 2 brown wires seperate to the new capacitor?

Again, thanks in advance for the help....I can fix multi-million dollar fighter aircraft but the technical stuff such as this is not my cup o' tea and I can use as much help as I can get!

 

[hvactech126]

I think you are trying to over complicate it and in the process you are confusing me as to what you are asking. I have a few different pics that may help.

 

[ogre2011]

I will try and post some pictures of it in the AM, I can't see my hand in front of my face outside right now.

I got every fan in the house on and am going to re-attack in the morning....

Do not mean to confuse, just trying to understand myself.

Will post pics ASAP and see if you can understand where I am coming from.

 

[ogre2011]

I am attaching pictures of what the system control section looks like.


It shows the old capacitor in its original holder with the blue and yellow wires running up to the ceramic deal and then onto the compressor set up. I have temp hooked the brown wires to a capacitor for picture purposes only to see if this set up will in deed work and not damage any of the equipment.

Will this set up work or do I need to move other wires around and get rid of/add something else to ensure this set up will work.

Any and all help would be greatly appreciated.

As it sits right now, I have the white wire from motor going to COM on original capacitor, I left the yellow wires attached to the same spot and the blue wires are on the HERM port of the old capacitor. All I did was move BOTH the brown and brown/white wires over to a different capacitor.

Thanks!

 

[ogre2011]

And just to make sure, if I use the same type capacitor, I would cap off the brown/white wire and only use the brown wire on the FAN spot of the round type capacitor.

I am just making sure I dont fdry my new motor nor mess up the HVAC unit in some form.

Buying a $6-30 capacitor is not an issue, just want to make sure I get the right stuff and have it wired all kosher like.

Thanks!!!

 

[hvactech126]

that setup should be fine with a new capacitor

 

[Thebigswig]

Wiring issue.

I think you are trying to over complicate it and in the process you are confusing me as to what you are asking. I have a few different pics that may help.

Thanks hvactech this was helpful. I know this post was over a year ago so hopefully you are still around helping. I had to install a new motor in my unit. And it used a different capacitor. I used the diagram to connect it because the wiring is different. The unit was working again which was great. Well that night I noticed the outdoor unit was still running even though it was off inside. I have the brown and the brown/white going to the capacitor and the black wire and white wire going to the relay. Now I had the black on the bottom right and the white one the bottom left. I went looking for more info and found someone saying it needs to be black on bottom left and white on top left. So I did that and when I turn on the ac. It work for a few minutes but then the outside unit shut off and the inside was still running so it was hot air blowing. I put the wires the way I had them so it can at least get cool again. Now the unit is running but it is still blowing hot air. Any idea what I am doing wrong? Any help would be great. Thanks. By the way it is the top connection. Oval 5mfd capacitor.

 

[hvactech126]

did you change your capacitor? If so, and you wired per the top picture then it should have worked and it sounds like it did. When you say the unit was still running and the indoor unit was off, do you mean that the compressor and fan were running or just the fan?

 

[Thebigswig]

did you change your capacitor? If so, and you wired per the top picture then it should have worked and it sounds like it did. When you say the unit was still running and the indoor unit was off, do you mean that the compressor and fan were running or just the fan?

Both were running the whole time even when the house cooled off and the inside unit shut off. Also now it's hot again and the unit is running outside. Thanks for the response.