Need capacitor values for 2HP emerson motor (IR compressor)

[Duane andrew]

Hello everyone,
I recently purchased an Ingersoll Rand compressor model SS3R2-GM Has the SS3 compressor and 2HP Emerson motor
2hp
3450 rpm
Single phase
115 volt
It's is missing both the start and run capacitors. Am hoping to find someone that has the same model, So I can get the correct size capacitors it came from the factory with. Thanks in advance.

 

[5ubtle]

This is not what you are asking for, but it might be helpful. Capacitor sizes can be estimated based on the info you have available. Search for "motor capacitor sizing chart".

I think you might get more attention here (in the forum) with a more descriptive title like "Capacitors values needed for Emerson 2HP motor"

 

[Duane andrew]

This is not what you are asking for, but it might be helpful. Capacitor sizes can be estimated based on the info you have available. Search for "motor capacitor sizing chart".

I think you might get more attention here (in the forum) with a more descriptive title like "Capacitors values needed for Emerson 2HP motor"

Thanks so much for your response.
I had looked at different capacitor charts on line but getting a lot of range/variations in specs. I tried the sizes suggested, but the start capacitor was getting hot. Ive tested the windings on the motor (good). Also centrifugal switch is working properly. Was trying to find someone with the same compressor so I new the exact size they came from the factory with. Was looking for the proper place to post on GJ but couldn't figure it out. I'm not the sharpest pencil in the box lol. When you say (in the forum) what are you referring to?
Thanks again for your help, I really appreciate it.

 

[5ubtle]

... Was looking for the proper place to post on GJ but couldn't figure it out. I'm not the sharpest pencil in the box lol. When you say (in the forum) what are you referring to? ...

In my opinion, you are "in the right forum (General Tool Discussion)". My suggestion just has to do with getting the "right attention" here. Many (most?) members don't read every post. They look for topics that interest them. If your title says "need help", you may not get much help. If your title says "I need motor capacitor values for 2HP Emerson motor (IR compressor)", you will better attract those members who can help you. You may be able to edit the title of your post if you see a "Edit" link at the bottom.

... I tried the sizes suggested, but the start capacitor was getting hot. Ive tested the windings on the motor (good). Also centrifugal switch is working properly...

You say that the centrifugal switch is working properly, but that the start cap is getting hot. I think that you already know that the start cap should only be in the circuit for a short time or else the cap will get hot.

With the info you provided in your second post, I'm pretty sure that somebody here will have some guidance for you.

 

[Duane andrew]

In my opinion, you are "in the right forum (General Tool Discussion)". My suggestion just has to do with getting the "right attention" here. Many (most?) members don't read every post. They look for topics that interest them. If your title says "need help", you may not get much help. If your title says "I need motor capacitor values for 2HP Emerson motor (IR compressor)", you will better attract those members who can help you. You may be able to edit the title of your post if you see a "Edit" link at the bottom.


You say that the centrifugal switch is working properly, but that the start cap is getting hot. I think that you already know that the start cap should only be in the circuit for a short time or else the cap will get hot.

With the info you provided in your second post, I'm pretty sure that somebody here will have some guidance for you.

Ok, got it, I'll try to edit it later. Thanks.
When the start capacitor got hot I figured the centrifugal switch points were sticking, thats when I took it apart to check windings and inspect the switch. The points look good . I put a smaller uf with higher vac. Cap in it and it's working ok now. Still looking for the factory specs on the capacitors so it doesn't ruin my windings down the road.

 

[5ubtle]

I think that you are on the right path. I am not an expert, but it is my belief that higher uf makes for more current through the start winding. You put in a smaller uf, which led to less current, which led to less heating.

If you can't find the OEM uf value, I suggest that you try smaller uf values until the motor no longer starts (under load), then go back to the slightly higher uf cap. I think that 250VAC (or higher) will be OK.

 

[Duane andrew]

I think that you are on the right path. I am not an expert, but it is my belief that higher uf makes for more current through the start winding. You put in a smaller uf, which led to less current, which led to less heating.

If you can't find the OEM uf value, I suggest that you try smaller uf values until the motor no longer starts (under load), then go back to the slightly higher uf cap. I think that 250VAC (or higher) will be OK.

Will do, thanks