Carrier 38VMH072 Series Installation And Maintenance Instructions Manual

Also see for 38VMH072 Series: Installation and maintenance instructions

Contents

21Fig. 32 below shows the arrangement of the power wires.Fig. 32 —Outdoor Unit Power Wiring ArrangementWIRING THE COMMUNICATION TERMINALBLOCK — Figure 33 is the communication port diagram forthe outdoor unit.Fig. 33 —Outdoor Unit Communication PortDiagramCOMMUNICATION CABLE — The type ofcommunication cable used is a shielded 2-core twisted paircable. The diameter of the wire should be AWG 18. Themaximum wire length should be within 3,937 ft betweenoutdoor and indoor units and within 820 ft between the wiredcontroller and indoor units. Communication wires are soldseparately but can be obtained through Carrier. Figure 34below shows a typical communication wire from Carrier.For typical communication wiring layout see Fig. 35.LEGEND1 — Main Power Terminal2 — Ring Terminal3 — Reusable Strain-Relief Wire Ties4 — Ribbon5 — Waterproof Connector6 — Communication Cable7 — Power/Ground Cable1234567LEGENDK1, K2 ReservedO, A To kWh meterX, Y To centralized controllerP, Q To indoor units communication busH1, H2 To outdoor units communication busOFig. 34 —Typical Communication Wire