Replacing Emerson condenser fan motor with Rescue 5 wire

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Old 05-14-15, 10:42 PM
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Replacing Emerson condenser fan motor with Rescue 5 wire

Old motor is

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3 wire connections black, red and brown.

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New motor is a Rescue model 5462 :

1/3 - 1/2 HP
208-230 Volt
1075 RPM
2.6-1.8 Amps
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When I started having problems, before buying a new motor, I replaced the capacitor to the existing motor hoping that would fix the problem, it did for a few minutes then the motor sounded like the bearings we're going out and smelled hot. The capacitor for the existing motor is 30 + 5.0 MFD. 440/370 VAC .

Old configuration...Black is to the lead in, brown is to fan on the capacitor, red is to common on the capacitor.

My questions are:

How to connect the five wires on the new motor. Black, Red, White, Brown and Brown with white stripe. The side of the box says black is the lead color for 1/3 HP. So Black to replace my existing black wire?

The red wire from my old motor is jumped from the motor to a connection then to the C on the capacitor will that need to be done on the new motor? (Pic Above)

Is my "just replaced" existing capacitor appropriate for this motor? The box stating I need 7.5 mfd / [email protected] OR. 5.0 mfd / [email protected]

Thank in advance!
 
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Old 05-15-15, 05:46 AM
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Remember to pull the bottom drain plug on your new motor so that it doesn't burn up in one year...


Unless you have an Ohm meter to verify that the white wire is the same wire as brown with a stripe, I recommend getting a separate cap.

Verifying that you have 230 volts is also advisable.

If you do verify that brown with a stripe is the same as the white wire:

Tape off brown with a stripe and tape off red separately.
White to Com on the dual cap.
Brown to Fan on the dual cap.
Black replaces black.

If you don't have an Ohm meter:
Both browns to a new cap.
Tape off red.
Black to black.
White to com on the dual cap or the spot on the contactor connected to this terminal.
 
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Old 05-15-15, 12:47 PM
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First of all, Thank you so much!!! I tested ohms on Black to White 11.1 and Black to Brown with White stripe 11.2 so they are the same right? Also want to verify that the 30 + 5.0 MFD. 440/370VAC capacitor is ok to use or do I need to get the 370/230V?

Thanks again, you made everything so clear!
 
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Old 05-15-15, 02:10 PM
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The capacitor you have is fine. You can always use a higher voltage capacitor in place of a lower voltage unit. Just don't go the other way (lower voltage in place of higher voltage).
 
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Old 05-15-15, 02:38 PM
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11.1 ohms is not ok.

You want to check from White to Brown w/white stripe. You should expect to see around 1 ohm or so.
 
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Old 05-15-15, 08:00 PM
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Checked white to brown stripe it was less than 1 ohm...black to brown stripe and black to white were ~ 11 ohms... My A/C is up and running!!!
 
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Old 05-15-15, 08:05 PM
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Thank you for your help! My A/C back on track!
 
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Old 05-15-15, 08:08 PM
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Thank you PJ, it was < one ohm
 

Last edited by Shannon R; 05-15-15 at 08:38 PM.
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Old 05-15-15, 08:42 PM
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Remember to pull the drain plug from the bottom of the new motor so that it doesn't fill up with water.

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Old 06-07-16, 04:43 PM
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I have the same emerson motor and same resue motor. Did you cap off the red and brown with white stripe?
 
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Old 06-07-16, 05:09 PM
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The motor should have come with a paper showing how wire the motor. I believe that whether the Brown/White Stripe wire is used or not depends whether you have the motor wired as a 3-wire or 4-wire motor.
 
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Old 06-07-16, 06:57 PM
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Here is a diagram of the motor

 
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Old 06-07-16, 09:26 PM
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Welcome to the forums.

Did you cap off the red and brown with white stripe?
Yes.... if you are using a dual capacitor then you will follow the three wire connection method..

Tape off brown with a stripe and tape off red separately.
White to Com on the dual cap.
Brown to Fan on the dual cap.
Black replaces black.
 
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Old 06-08-16, 07:15 PM
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I wired it as shown in the diagram and it is working. AC was 95 in my house wowza....Thanks All....
 
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Old 06-08-16, 11:24 PM
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Thanks for letting us know the outcome.

I can see by the page views that this is a hot topic. It's actually become a standalone thread. It will be sent to our searchable threads where it will always be available for reference.

If you have questions after reading this thread... please feel free to start a new one and you can also reference this one by coping the address and posting it in your new thread,
 
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