RTH2300/RTH221
21 69-2728ES—01
About your new thermostat
SETUP WIRING ASSISTANCE TROUBLESHOOTING
If labels do not match letters on the thermostat, check the
chart below and connect to terminal as shown here (see
notes, below).
Alternate Wiring
If wires will be connected to both R and Rc terminals,
remove metal jumper (see page 6).
Do not use C or X. Wrap bare end of wire with
electrical tape.
If you have a heat pump without auxiliary/backup heat
connect O or B, not both. If you do not have a heat
pump, do not connect B. Wrap bare end of wire with
electrical tape.
Place a jumper (piece of wire) between Y and W if you
are using a heat pump without auxiliary/backup heat.
Thermostat does not work on Heat Pumps with auxiliary/
backup heat.
B O G Y
W
NOT
USED
R Rc
M32734
44
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