Wiring in Condenser Fan Motors - Short #199

HVAC School - For Techs, By Techs

Bryan Orr

Training, Careers, Airconditioning, Self-improvement, Hvac, Business, Education, Refrigeration, Heating, Ac, Apprenticeship

4.8 • 985 Ratings

🗓️ 25 June 2024

⏱️ 15 minutes

🔗️ Recording | iTunes | RSS

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Summary

In this short episode, Bryan talks about wiring in condenser fan motors, including aftermarket motor considerations and the different wire configurations.

When condensing fan motors fail, we need to know what to use to replace them. We often use PSC motors, though in cases when we replace a motor with an ECM, we still need to match the horsepower despite the increased flexibility. The motors we typically keep on our truck are 1/3 or 1/6 HP motors.

Frame size (diameter) and depth also come into play; you may encounter a 42-frame motor or a 48-frame motor. You can't replace an 825 RPM motor with a 1075 RPM one because the poles are different (6-pole vs. 8-pole). Single-phase 208/230v will be the most common motors in residential systems, and the phase and voltage must match. You should also know how to reverse a motor if it is reversible. The bearing type will have some tradeoffs; ball bearings last longer but are louder than sleeve bearings.

3-wire and 4-wire condensing fan motors are essentially the same; the white wire and brown-and-white wire are essentially the same, as there is a jumper inside the motor. You can connect a 4-wire condenser to both sides of the capacitor; in any case, follow the wiring diagram.

When mounting a motor, make sure the wires are strapped properly. Then, remember to unplug the correct weep ports (opposite side of the shaft) to allow condensate to drain out.

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Transcript

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0:00.0	Giggity, giggity, this is Brian with the HVAC School podcast and this is a short episode.
0:08.8	And in this short episode we're going to talk about condensing fan motors.
0:11.4	For some reason this is like the most popular topic right now. So we must have an epidemic of condensing fan motor challenges. Who knows? Or condenser fan motor or condenser motor or whatever you want to call this kind of motor. But before we talk
0:23.7	about this, we're going to hear from our great sponsors.
0:27.8	Refrigeration Technologies at refriggedech.com. The Navac, andX-1 Nexus Digital Manifold Gage compatible with over 72
0:38.8	refrigerants including the newly popular A-2-L refrigerants that we keep talking about, R-32 and R-454B.
0:47.3	Among the highest accuracy manifold gauges in the industry, they offer a clear digital display, giving you precise readings at a glance and they integrate with the My Navac app.
0:57.9	Navac temperature probes and Navac's premium micron gauge. So now you can monitor system pressure, temperature and
1:04.8	vacuum all in one app. To find out more go to HVACR School
1:09.7	dot com slash annex1 or go to navact Global.com.
1:15.0	Carrier and carrier.com.
1:17.8	Carrier has been a long-term sponsor of the podcast.
1:20.4	They've made it possible very early on for us to do what we do and they are the products that we sell day in and day out everything from
1:27.2	Single stage equipment all the way up to the green speed extreme
1:31.3	One of the most efficient products on the market today, find out more about what
1:35.8	carrier has to offer and about becoming a carrier dealer by going to carrier.com.
1:42.2	The Esco Institute and the HVACR Learning Network.
1:46.8	Our friends Howard and Jerry Weiss, Jason Objute, Eugene Silverstein, Clifton Beck, all great guys who are huge advocates for the industry are working hard to provide industry leading online content for HVACR professionals.
2:00.0	Visit HVACR. E. Learn. network to access reliable, up to date and relevant digital resources and even
2:08.8	earn continuing education hours. Enhance your knowledge today with HVACR Learning Network from the
2:15.6	ESCO Institute. As always find out more by going to ESCO group.org.
2:20.8	All right, so a couple things right off the bat.
	...

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