Terminal Designator Descriptions; Sc5811 Output Chart - ICM Controls SC 5811 Manual

R – 24 VAC hot
C – 24 VAC common
W 1/O/B – Configurable
W1 – 1st stage heat for non-heat pump systems
O – cool active reversing valve
B – heat active reversing valve
Y1 – 1st stage cool, 1st stage heat for heat pumps
W2 – 2nd stage heat for non-heat pump systems, emergency heat for heat pump systems
Y2 – 2nd stage cool for 2 compressor systems, 2nd stage heat for 2 compressor heat pump systems
G – Fan
Heat/Cool
Heat Pump (One Compressor)
Heat Pump (Two Compressors)
Emergency Heat (Heat Pump Only)
The SC5811 thermostat is configurable for all systems . The configuration directly affects the outputs .
Use the output chart to correctly configure and wire the thermostat to your system .


Terminal Designator Descriptions

SC581 1 Output Chart
* G not energized when configured as a gas/oil system
1 ST Cool 2 ND Cool
Y1,G YI,Y2,G
Y1,G,O Y1,G,O
Y1,G,O Y1,Y2,G,O
N/A N/A
1 ST Heat 2 ND Heat
W1,G* W1,W2,G*
Y1,G,B Y1,W2,G,B
Y1,G,B Y1,Y2,G,B
W2,G W2,G