Honeywell RTH5100B - Wiring

21 69-2329EF—03
TROUBLESHOOTINGASSISTANCESETUP WIRING
RTH5100B
Rc
R
Y
NOT
USED
O/B W
G
DO
NOT
CONNECT
MCR29548
C
Rc
R
W
Y
G
OR R
OR RH 4V
OR Y1 M
OR W1 H O B
OR F
OR X B
Wiring
If labels do not match letters on the thermostat, check the chart below and
connect to terminal as shown here (see notes, below).
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.