bryant electric furnaces?

Question

I have a 27 year old house with two Bryant electric furnaces. One of them has just burned out the blower motor and I need to find a replacement. The stock motor appears to be a 3 speed, 240v, 60hz, 1/4 hp, 1050 rpm, 3.9 amp one that has a purple, a red, and a black wire hooking it up. I found a Fasco D749 1/4 hp, 208-230v, 1075rpm 1 speed motor at a local hardware store but it has two brown wires hooked to capacitor and a black and a white wire. I don't know how to hook this up to make it work. Can anyone make this motor work or is there another motor which will wire right up?
Thank you for your help.

Answer 1

Log on to http://www.johnstonesupply.com/

In the right side, click on "Browse our Catalog"
Now on the left side, click on "Motors & Motor Accessories"
Under this category, click on "OEM Replacement Motors"
Now click on "A-C"
Now click on "Bryant/Carrier 2 -Speed Motor" or "Bryant/Carrier/Day & Night 4-Speed Motor"

Do either of these look like your motor? If so, go back to the home page and find the Johnstone Supply nearest to you. They sell primarily to appliance and HVAC repair professionals, but I have had no problem buying replacement parts.

Answer 2

From what I gather you old motor would have a bigh and low speed depending on which wire was activated. My guess is the black wire would always be connected and the red or purple would be selected depending on the desired speed.

Your replacement motor is only a single speed - not ideal, but will serve to get you heat until you find a suitable two speed. The black and white wires would drive it, the brown are only for the starting capacitor. To use this with just the one speed I would try the black to black and the white to where the old red wire used to go. If the speed isn't where you want it switch the white wire to the purple instead.

Answer 3

New motor connections
Brown to capacitor
White to purple
Black to red and black to allow for blower on heating and cooling.

The D749 is a condenser motor running at 1.8 amps and will not last as long using it for a blower due to the power factor. It may overheat and shut down because the blower wheel will be moving a lot more air versus a fan blade.

Answer 4

The best way to get the correct replacement motor for your electric furnace is to write down the brand name of the furnace and the model and serial number of the furnace. Check in your are for a Bryant dealer or go to a Heating and cooling supply house. They should be able to match your motor up with a replacement. Good luck