ECM Motors Wiring. On your submittals and motor data sheet (upper right) you will notice a motor model call out for example: EC-TI, EC-VNT, EC-PS and so on. This information is used to look up the wiring diagram for those specific manufacturers’ motors. Go to the literature link on the fan then to manuals the fan manual will have links (QR Codes) on the sheet and also the wiring diagrams are listed under the manual designated by the motor manufactures code as noted above.