6
Terminal Designator Descriptions
SC,S1,S2–Remotesensororoutdoorsensor
RC,RH–24VAChot
C–24VACcommon
Y1–1ststagecool,1ststageheatforheatpumps
Y2–2ndstagecoolfor2-compressorsystems.2ndstageheatfor2-compressorheatpumpsystems.
G–Fan
W1/O/B–Congurable
W1 – 1ststageheatfornon-heatpumpsystems
O – Coolactivereversingvalve
B – Heatactivereversingvalve
W2–2ndstageheatfor1compressorheatpumpandnon-heatpump
AUX–3rdstageheat
Note:Not all terminals are used in every model.