Replacing 3 Wire Condenser Fan Motor With 4 Wire

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3-Conducting wire and 4-Cable Condensing Fan Motor Connection

Diagram courtesy of Emerson

Unprecedented techs have a common question of how to telegram a condensing fan causative for 3 vs. 4 wires. Jesse Grandbois submitted this tech tip to help make information technology acerose. Thanks, Jesse!

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This tech bakshis is a quick one and only happening the difference between wiring universal condenser buff motors and wherefore brown + white is the same electrify as white. This one seems to fuddle even experienced technicians, but it's actually very simple once you see to it it. Now, keep in mind that wire colors ACTUALLY MEAN NOTHING, but the colors lean to be conformable connected service replacement motors. As always, concern to the wiring diagram on the particular drive you are using.

I'll provide a diagram and explicate the wires below.

Here's the 3-wire method:

• White wire from the condenser sports fan causative to one side of meat of business leader along the contactor (T1) and jumped to one root of the fan capacitor. This is AC power and non a dual electrical condenser, so the pole side does not matter.
• Black wire from the condenser fan motor to the other side of power along the contactor (T2).
• Brown conducting wire from the condenser fan motor to the other side of the capacitor opposite the jumper wire.
• Ceiling slay brown + T. H. White (fresh).

Straight off, for your 4-wire method:

• White wire from the capacitor fan motor to one sidelong of power along the contactor (T1).
• Black cable from the condenser lover motor to the other face of great power on the contactor (T2).
• Robert Brown wire from the condenser fan motor to the capacitor. Again, this is AC power and not a duple electrical condenser, thus the final side does not matter.
• Brown + white wire to the separate side of the capacitance.

As you can see, the only difference is that there is no jumper from the contactor to the condenser. That is because the brunet + white and the white is the same wire. They're joined inside the motor. The brown telegram with the white stripe is only at that place for convenience.

If you need to prove that the Patrick Victor Martindale White and brown w/ Edward D. White band are the Same, take an ohmmeter and test betwixt the two. You will find that it either reads no or very low ohms, proving that they are directly connected within the centrifugal.

—Jesse Grandbois

P.S. – If you would alike to understand 3 or 4-wire connections within the entire litigate of replacing a optical condenser fan, please check out this article.

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Replacing 3 Wire Condenser Fan Motor With 4 Wire

Source: https://hvacrschool.com/3-wire-4-wire-condensing-fan-motor-connection/