Wiring
If labels do not match letters on the thermostat, check the chart below and
connect to terminal as shown here (see notes, below).
Rc
R
Y
NOT
USED
O/B W
G
DO
NOT
CONNECT
Rc
OR
R
R
OR
RH 4V
Y
OR
Y1 M
W
OR
W1 H O B
G
OR
F
C
OR
X B
MCR29548
21
If wires will be connected
to both R and Rc terminals,
remove metal jumper (see
page 6).
Do not connect both O and
B if you have a heat pump.
Connect O wire to O/B W.
Wrap B wire with electrical
tape and do not use.
Do not use C, X or B.
Wrap bare end of wire with
electrical tape.
69-2329ES—03
RTH5100B