5
R – 24 VAC hot
C – 24 VAC common
W1/O/B – Configurable
W1 – 1st stage heat for non-hp systems
O – cool active reversing valve
B – heat active reversing valve
Y – 1st stage cool, 1st stage heat for heat pumps
W2 – 2nd stage heat for heat pump, non-heat pump, and emergency heat
E – 1st stage heat for Emergency Heat operation
G – Fan
Terminal Designator Descriptions
The SC2311 thermostat is configurable for different systems. The configuration directly effects the outputs.
Use the output chart to correctly configure and wire the thermostat to your system.
1
ST
Cool 1
ST
Heat 2
ND
Heat
Heat/Cool Y,G W1, G* W1, W2, G*
Heat Pump (One Compressor) Y,G,O Y, G, B Y, W2, G, B
Emergency Heat HP N/A E, G E, W2, G
* G not energized when configured as a gas/oil system
SC2311 Output Chart
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