Honeywell RTH7400D - Page 9

9 69-1726—1
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.
Y
G
R
C
R
OLD THERMOSTAT
WIRE HOLE
WIRES NOT CONNECTED –
DO NOT CONNECT TO
NEW THERMOSTAT
M22040
WIRE
SCREW TERMINAL
LETTER DESIGNATION
W