Can you use two wire rs485 comms between the stat, indoor and outdoor unit?

Yes, the A5HL5048A1000A outdoor unit and A5AHV006A1D3 air handler can use two-wire RS-485 communication between the thermostat, indoor unit, and outdoor unit, but the exact thermostat wiring depends on the communicating thermostat being used. The system’s installation documentation confirms RS-485 communication for this equipment family.

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