What is the correct wiring sequence for a 2H/1C system?
For a 2 Heat/1 Cool heat pump system, use terminal C for common [3], B for changeover valve energized in heating [5], R for power [1], L sends output when set to Em. Heat [8], O for cooling valve control[5], G for fan relay, Y for compressor contactor (Page 4).
From the official Honeywell Pro Th3210d manual, page 4
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