HVAC Communication TerminalsHVAC outdoor connection* Polarity is not required on the HVAC communication line.** Centralized (group) address required. Connecting to the line plugSecure the cables in the L1 line plug. Plugging to the CloudBoxInsert the plug in to the CloudBox L1 socket. Check DIP Switches are set correctlyDip switches setup for VRV HVAC system on L1.