Terminal Designator Descriptions; Sc5812 Output Chart - ICM Controls SC 5812 Operation 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 1 compressor heat pump and non-hp, 3rd stage heat for 2 compressor heat
pump systems
Y2 – 2nd stage cool for 2 compressor systems, 2nd stage heat for 2 compressor heat pump systems
G – Fan
W3 – 3rd stage heat for non-hp systems and 1 compressor heat pump systems
Heat/Cool
Heat Pump (One Compressor)
Heat Pump (Two Compressors)
Dual Fuel (One Compressor)
Dual Fuel (Two Compressors)
Emergency Heat (Heat Pump Only)
The SC5812 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

SC5812 Output Chart

1 Cool
ST
Y1,G
Y1,G,O
Y1,G,O
Y1,G,O
Y1,G,O
N/A
* G not energized when configured as a gas/oil system
2 Cool 1 Heat
ND ST
YI,Y2,G W1,G*
Y1,G,O Y1,G,B
Y1,Y2,G,O Y1,G,B
Y1,G,O Y1,G,B
Y1,Y2,G,O Y1,G,B
N/A W2,G
2 Heat 3 Heat
ND RD
W1,W2,G* W1,W2,W3,G*
Y1,W2,G,B Y1,W2,W3,G,B
Y1,Y2,G,B Y1,Y2,W2,G,B
W2 W2,W3
Y1,Y2,G,B W2
W2,W3,G N/A