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RTH6400
21 69-2210EF—03
SETUP WIRING ASSISTANCE TROUBLESHOOTING
Wiring
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.
If labels do not match letters on the thermostat, check
the chart below and connect to terminal as shown here
(see notes, below).
M28418