ICM Controls SC 2000 - Page 12

10
Heating/Cooling
4-Wire, Single Transformer
HOT
120 VAC 24 VAC
Pre-Installed Jumper
Transformer
Heating
Control
Cooling
Control
Fan
Control
T
H
E
R
M
O
S
T
A
T
RH
RC
W
Y
B
O
G
HOT
RH
RC
W
Y
B
O
G
120 VAC 24 VAC
Remove
Pre-Installed
Jumper
Heating
Control
Cooling
Control
Fan
Control
(Heating)
Transformer
(Cooling)
Transformer
HOT
120 VAC 24 VAC
T
H
E
R
M
O
S
T
A
T
Note: Both transformers must be in phase
5-Wire, Two Transformer