I have replaced the induction motor from my carrier 48gp. The guy that took it out (HVAC "freind") will now not answer the phone. I have the unit bolted in and I know where a couple of the wires go, but I need help with the others. There is a yellow, green (ground), brown, and purple coming off the fan assembly its self. I do not have any clue where the purple wire goes. Can you help??

Is it the right fan? It has a extra wire that the other did not have?

I don't know the guy that took it out has it. Is that a poss. It bolted in just fine and fir perfect

If it does have an extra wire what do I do??

Most fans have the same bolt pattern, this does not necessarily mean it is the right fan, some fans are for 2 stage gas valves thus the 3rd wire.

So I'm screwd

Does the motor have a wiring diagram label present? The brown suggests a capacitor may be required.

No I got the motor from a wholesale yard they would not give me any instructions because they do not sell to the public

I am in drywall sales so this can be a dumb question... do I have to hook all wires up?
I know dumb

Is there ANY nomenclature (brand, mfg. #, h/p, voltage, r.p.m. etc.) on the motor?

Where do you have he other color wires hooked now?

The part is from the carrier replacement parts div. The fan is bolted in so I do not have it next to me at this time

Green grounded
Yellow is hooked to a set of four prongs sitting to the right of the mother board (capacitor?)
And the brown is hooked into the mother board at the top right

Do these colors match the previous motor?

Can you post a pic of where you have the yellow going?

That's the problem the guy took the last one and like an idiot I did not take a pic before he started

My wife has the damn camera at work
All I got is a cell phone camera

Is this a package unit?

You are taking quite a gamble if you power this motor without verifying correct wiring. It could be a 2-speed motor as Josh said, or it may require a capacitor (the brown lead suggests it does). If you release the genie from the motor, you will never catch him.

As in ac and heating

As in outside, ac and heat in one.

I would think that a carrier supply house would get me the correct motor

Look on the back of the door, the wiring diagram will be there you can see how many wires came off the old motor and where they go.

Yes it is Ac and Heating out side

I would think that a carrier supply house would get me the correct motorIt may be the correct replacement, even if it isn't identical to the original. Sometimes change is good.

Kc you probably do more with carrier then me, do they have package units with 2 speed motors?

What if its two speed then can I hook it up to a single speed unit

I have never seen a 2 speed fan on a package unit. Did you find the wire diagram on the back of the door?

kc you are probally do more with carrier then me, do they have package units with 2 speed motors?Not that I have seen, but some have a capacitor wired as such: brown to CAP1, yellow + L1 to CAP2, purple to L2. I have seen others with yellow & purple reversed.

I am looking at it now
The fan says that it is 23 volt
60 htz
3450 Rpm
1/16 HP
And made by AO smith

The diag has
v10
Yel
Brn
Green
Leaving the capacitor

If it has just 1 rpm listed it is not 2 speed. If you have 2 that go to the cap, then you only have 1 left. No common that way.

Is there a purple wire anywhere on that diagram?

I can't believe I forgot and this might help you guys
There is a cord that has blue white and red running into a female end that plugs into the mother board.

No not that I see
What is V10 (power?)

OK so you have a blue and a white. That plug to the board? That should be the power. Then the yellow and the purple should go to the cap. And the green is ground.

I think he marked the Brown
What is the cap??

Capacitor... sorry
Is that the two four prongs sitting to the right of the board?

http://img.diytrade.com/cdimg/377701/3324936/0/1173317219/AC_capacitor_CBB65.jpg

I forgot about the brown wire I must go to the capacitor also. I am trying to find you wireing diagram online.

Yes I am with you know
There is a yellow running to the cap already not the one from the fan... so an additional yellow and the brown go to the cap.

I have been looking for a diag. for two weeks

Wait brown is marked I think there is a B written next to a prong... I need the purple

http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/48gh,gl-1w.pdf


This may help . Still looking.

Nope that last link does not have the gp, no luck on finding it either.

I got a camera I am trying to up load pics now

How do I import pics

Pages 3 & 4 on the link, "IFM" is what you're looking for. Brown connects to one side of the capacitor, yellow & "L2" connect to the other side of the capacitor, and purple connects to "L1".

Thanks for the help man
I guess I am going to have to hire sombody to come and fix this. You guys were great
Thanks again

Pages 3 & 4 on the link, "IFM" is what you're looking for. Brown connects to one side of the capacitor, yellow & "L2" connect to the other side of the capacitor, and purple connects to "L1".Oops... "IFM" is "indoor fan motor", not "inducer fan motor". I would bet that, fundamentally, the wire colors represented would be correct in how to wire the motor & capacitor.

Are you sure that is the right diagram, I was not thinking so. That's what I was thinking, indoor fan motor.

It's pretty close, but not exact.

KC... would yellow attach to the side of the cap. That there is already a yellow running to?
I think I Know where the brown attachs it is marked "B"... It's the purple wire I am asking about

You guys are beating yourselves to death. Make a phone call or send an email. A.O.Smith Electrical Products Company (http://www.aosmithmotors.com/contact/contactform.aspx?ekmensel=fb5d653b_6_16_btnlink)

But you need to know the model of the motor.

They are very receptive.

Quit knocking yourselves out.

We don't count ground. If we can assume a PSC motor, a few reistance checks and your done.

Green ground - (check)


We can figure it out with a few resistance checks.

Think of 3 wires and one is tapped (not quite center), call that point C

The lower resistance to C is neutral
C is L1
The higher resistance goes to the cap
The other side of the cap goes to L1

There may be a reverseable plug on the motor. That changes direction.

DONE!

PS: I think there is an XREF on the AO site too.

KC.... would yellow attach to the side of the cap. that there is already a yellow running to?
I think i Know where the brown attachs it is marked "B"...... It's the purple wire i am asking aboutI can't find a diagram for your unit, so I am unsure what the function of the "B" terminal is. The yellow motor lead should connect to the capacitor with the "L2" power supply lead - probably yellow. The brown motor lead should connect to the unoccupied capacitor terminal. The "B" terminal may be a controlled/switched line voltage output for the inducer, in which case the purple lead would connect there. If you can provide the complete model #, I may have more success in tracking down a diagram.

Complete model number for the motor or for the unit

complete model number for the motor or for the unitThe unit will do for now.

48gp-048090311

Look at page 21 at the drawing. Then look at IDM which is your draft inducer motor. Then look at V10 which is Violet=Purple then to W50 then to CM. Then you will see where the wire goes.

This wiring is for a 3 phase unit BUT all the units use single phase for this part of the wiring.

Always check voltages when connecting and I believe that fan is 230 volt not 23 volt.

That little motor also has a capacitor also so you should have got a new one since they go bad or can cause the motor to fail. The capacitor is a lot cheaper that a new motor so I suggest you replace it also.

http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/48gp-3pd.pdf

BTW here is the main page in case you want to look up other stuff.

48GP (http://www.commercial.carrier.com/commercial/hvac/product_technical_literature/1,3069,CLI1_DIV41_ETI4922_PRD727,00.html#Bulletin-Bulletin), Product

http://www.shutterfly.com/lightbox/view.sfly?fid=93f11c6058dff0b26cbbd47cbb382743

That is one bad pic of theboard
I can get better ones

Your answer is in my post and I cannot access your pictures. LOL

Can you see the "y" and "B" he wrote on the board

You guys are beating yourselves to death.
It's a slow Wednesday. May get help with that tomorrow... :D

But you need to know the model of the motor.Who was it that said, "Ask, and ye shall receive"? I'm waitin'...

Quit knocking yourselves out.The Sominex isn't working...

We can figure it out with a few resistance checks.My meter probes are too short...

OK like I said not hvac is not my cup of tea

Yellow is going to go to the top of the cap with the other yellow already hooked up
The brown will go to the B marked on the top right of the mother board and the violet will go to the bottom of the cap?

Look at page 21 at the drawing. Then look at IDM which is your draft inducer motor. Then look at V10 which is Violet=Purple then to W50 then to CM. Then you will see where the wire goes.

This wiring is for a 3 phase unit BUT all the units use single phase for this part of the wiring.

Always check voltages when connecting and I believe that fan is 230 volt not 23 volt.

That little motor also has a capacitor also so you should have got a new one since they go bad or can cause the motor to fail. The capacitor is a lot cheaper that a new motor so I suggest you replace it also.

http://www.docs.hvacpartners.com/idc...t/48gp-3pd.pdf (http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/48gp-3pd.pdf)

I posted it again so you would not miss it. This is for your exact unit. Click the link and follow the directions to the page etc.

You don't understand I don't uderstand this
I have no idea what w50 is.
You have to put it in "lay man terms"
Yellow to cap top
Purp to cap bottom
Brown to mother board

Does it matter what side of the cap I hook each wire to??

What is CM

You dont understand I dont uderstand this
I have no idea what w50 is.
You have to put it in "lay man terms" He did, actually. Maybe it's time for a pro...

yellow to cap top
purp to cap bottom
brown to mother boardHave your 3 wishes ready...

No, not for motor caps.

Damn I am so close I thank you guys for the help... I just need heat and I am broke construction is down as you guys know and I am hurting for the dollar. If I could send pics I would think you guys could exsplain it to me

Sampson79

The link has a drawing. It is very simple and I explained what page etc so you would have no problems. The wiring works its way back to the circuit board and CM is marked on the board. The wiring diagram shows you what colors off the motor goes where so as to mak it simple for you to figure out and that is why I posted it to start with to make it easier for you to see how it was wired. I also meant what I said about the capacitor for that motor you are replacing. If it is weak or defective the new motor you just bought will go out and then you will have to buy another motor since any warranty you got with the new part will not be covered.


BTW CM stands for Combustion Motor. As in the combustion motor terminal on the circuit board where it is located.
Good luck

Thanks man I thank you for the help

No problem we try to help as best as possible.