CMNET - HVAC Hitachi VRF installation guide Yoram Dagan January 10, 2022 09:09 Updated HVAC Communication TerminalsHVAC outdoor connection * For Heat Recovery systems the connection is at outdoor units only. * Polarity is not required on the HVAC communication line. Connecting to the line plugSecure the cables in the L1 line plug. Plugging to the CoolMasterNetInsert the plug in to the CoolMasterNet L1 socket. Check DIP Switches are set correctlyDip switches setup for VRF HVAC system on L1. Related articles CMNET - Virtual Addresses CMNET - HVAC Daikin VRV quick installation guide CMNET - HVAC LG VRF installation guide Comments 0 comments Please sign in to leave a comment.