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LEGEND
*Where X is the unit control software version number.
Fig. 27 — Control Board Diagram
CCN — Carrier Comfort Network N.O. — Normally Open
COM — Common R—Relay
D—Diode SIO — Serial Input/Output
DIP — Dual In-Line Package SW — Switch
LED — Light-Emitting Diode T—Terminal
N.C. — Normally Closed