I live in an unconventional loft style home with a fully exposed HVAC heat pump system. The air handler is a Nordyne B5BM-T42K-B system as described on this Nordyne web site
. The wiring diagrams for the air handler and motor can be seen here.
I know a little about electrical systems, but I'd like confirmation as to whether my reading of these diagrams is correct.
I have been wondering if I could reduce the fan speed on my system to make it quieter and run continuously during winter months. According to the Nordyne web site, this system can be configured for multiple speeds. Mine appears to be capable of three speeds. The motor wiring diagram shows six connections with numbers 4, 5 and 6 controlling motor speed. I looked at the blower motor plug on my unit and saw red and black wires connected to 6, and nothing connected to 4 and 5. That leads me to believe my fan is already configured to run at its lowest speed. If that is the case, then I assume there is little more I can do.
Does anyone see this different from me? Does anyone have any solid ideas for reducing the fan speed on this system?