Honeywell RTH5100B Installation Instructions Manual page 9

Step 4. Follow Special Instructions (Cont)
5. If you find any wires not connected to your old
thermostat, do not connect them to your new
thermostat.
6. Wrap the end of the wires that are not connected
with electrical tape.
OLD THERMOSTAT
Y
G
R
C
Step 5. Label and Disconnect Wires from Old
LETTER DESIGNATION
W
SCREW TERMINAL
WIRE
WIRE HOLE
R
WIRES NOT CONNECTED –
DO NOT CONNECT TO
NEW THERMOSTAT
Thermostat
9
M22040
69-1716