I have an old G.E. ahu 3 phase 460 volt model# BWE060C400EO and serial# 175662. It is being used to heat and cool a nursing home. Problem I am having is the blower motor is locking up,and don't know if motor is compatable with this system due to multiple changes and no info. on original. Also have 480 volts as line voltage to motor. Would this cause a problem with motor failures? Does anyone know RPM of original motor. 56 frame belt drive 5/8 shaft is what is in there now.