TXU Energy iThermostat, Installation Manual

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iThermostat ™ Installation Manual 23
Alternate Wiring Diagrams
+
+
+
+
+
+
+
+
+
+
O
C
B R Y1 E/W1
L
G
Y2
W2
C
L
G
Y2
W2
E
Y1
R
Or B or X or X1
Or F or L1
Or F
O
r R
C
or
R
H
Y O
r M
W1
o
r F
Conventional System
+
+
+
+
+
+
+
+
+
+
O
C
B R Y1 E/W1
L
G
Y2
W2
C
L
G
Y2
W2
E
Y1
R B O
Or B or X or X1
Or F or L1
Or F
Or H Or
Z
O
r R
C
or
R
H
Y O
r M
W1
o
r F
Heat Pump
+
+
+
+
+
+
+
+
+
+
O
C
B R Y1 E/W1
L
G
Y2
W2
C
L
G
Y2
W2
E
Y1
R
Or B or X or X1
Or F or L1
Or F
O
r R
C
or
R
H
Y O
r M
W1
o
r F
Conventional System
+
+
+
+
+
+
+
+
+
+
O
C
B R Y1 E/W1
L
G
Y2
W2
C
L
G
Y2
W2
E
Y1
R B O
Or B or X or X1
Or F or L1
Or F
Or H Or
Z
O
r R
C
or
R
H
Y O
r M
W1
o
r F
Heat Pump