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Ronc54 · Jul 19, 2012, 10:51 AM

Fan is not bad, but when I had freon levels checked service guy said the seal had failed and fan could last two years or two days. Called Grainger with the OEM part # and they matched it with a Dayton 4M206J and a 7.5 mfd 370VAC capacitor. I am pretty handy and seemed to be a simple task. Was about half the price of the OEM emerson on eBay.

Everything matches on specs but the Lennox has a shared capacitor with connections for both the compressor and the condenser fan. Dayton fan shows option for a four wire connection which would be for the new capacitor or a three wire which appears correct for the dual one on the unit.

Question is can I safely use the new motor with the existing dual capacitor or use the four wire method with the new capacitor. If I use the new one will there be any issues with the dual one as far as the compressor. Or should I just spring for the Emerson motor? The only difference in specs seems to be that the Dayton shows as 2.5 to 2.8 amps where the OEM on the unit shows FLA of 1.7 amps.

I have attached pics of new and old setup.

Thanks

Ronc54 · Jul 19, 2012, 10:55 AM

Originally Posted by Ronc54

Fan is not bad, but when I had freon levels checked service guy said the seal had failed and fan could last two years or two days. Called Grainger with the OEM part # and they matched it with a Dayton 4M206J and a 7.5 mfd 370VAC capacitor. I am pretty handy and seemed to be a simple task. Was about half the price of the OEM emerson on ebay.

Everything matches on specs but the Lennox has a shared capacitor with connections for both the compressor and the condenser fan. Dayton fan shows option for a four wire connection which would be for the new capacitor or a three wire which appears correct for the dual one on the unit.

Question is can I safely use the new motor with the existing dual capacitor or use the four wire method with the new capacitor. If I use the new one will there be any issues with the dual one as far as the compressor. Or should I just spring for the Emerson motor? The only difference in specs seems to be that the Dayton shows as 2.5 to 2.8 amps where the OEM on the unit shows FLA of 1.7 amps.

I have attached pics of new and old setup.

Thanks

Here are the other four pics

hvac1000 · Jul 19, 2012, 11:33 AM

Originally Posted by Ronc54

Fan is not bad, but when I had freon levels checked service guy said the seal had failed and fan could last two years or two days. Called Grainger with the OEM part # and they matched it with a Dayton 4M206J and a 7.5 mfd 370VAC capacitor. I am pretty handy and seemed to be a simple task. Was about half the price of the OEM emerson on ebay.

Everything matches on specs but the Lennox has a shared capacitor with connections for both the compressor and the condenser fan. Dayton fan shows option for a four wire connection which would be for the new capacitor or a three wire which appears correct for the dual one on the unit.

Question is can I safely use the new motor with the existing dual capacitor or use the four wire method with the new capacitor. If I use the new one will there be any issues with the dual one as far as the compressor. Or should I just spring for the Emerson motor? The only difference in specs seems to be that the Dayton shows as 2.5 to 2.8 amps where the OEM on the unit shows FLA of 1.7 amps.

I have attached pics of new and old setup.

Thanks

Whenever I change a fan motor that uses a capacitor be it a run or in some cases a start and run capacitor (this combo is usually left to larger HP motors and not normal HVAC fan motors) I always change the capacitor even if the old one matches the new motor. The reason for this is the fact that the old capacitor is of the same age as the defective motor which usually makes it old and unless you have a real capacitor checker you cannot tell if the old capacitor is still good enough to use. Change the capacitor to prevent problems down the road.

Ronc54 · Jul 19, 2012, 11:51 AM

Ok thanks, so no longer having the fan motor connected to the dual capacitor will not cause any issues as the compressor will now be the only thing connected to it?
In other words I just use the wiring diagram on the new motor with the new capacitor?