ICM Controls I3 1010HR Installation, Operation & Application Manual page 7

* Remove factory-installed jumper for systems with two transformers.
** Common wire is optional with batteries installed.
Note: Not all terminals may be used with every model.
Wiring Diagrams (continued)
2020HR Heating/Cooling
Optional
Remote or
Outdoor
Sensors
Heating Transformer
120 VAC 24 VAC
Cooling Transformer
120 VAC
S1
Sensor Common
SC
S2
RH
RC
C
Y1
Cool/Compressor #1
W1
Heat #1/Reversing Valve
O/B
Fan G
Heat #2 W2
Cool/Compressor #2
Y2
(de) Humidifier
AUX
T
H
E
R
M
O
S
T
A
T
7