CMNET - HVAC Mitsubishi Electric VRF installation guide Yoram Dagan December 26, 2021 16:13 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 plug Secure the cables in the L1 line plug. Plugging to the CoolMasterNet Insert the plug in to the CoolMasterNet L1 socket. Check DIP Switches are set correctly Dip switches setup for VRF HVAC system on L1. Related articles HVAC Mitsubishi Electric Non-VRF installation guide CMNET - HVAC Daikin VRV quick installation guide Mitsubishi Electric - Connecting to multiple refrigerant systems Comments 0 comments Please sign in to leave a comment.