Honeywell RTH221B1047 Owner's Manual page 4

2 Remove Old Thermostat
Remove old thermostat but leave wallplate with wires attached.
Do not remove wallplate yet
Terminal
designation
3 Label Wires with Tags
Label the wires using the supplied wire labels as you disconnect them.
4 Separate Wallplate from New Thermostat
Remove wallplate from the new thermostat and mount onto wall.
If you have an older thermostat with
a sealed mercury tube, turn to page
2 for proper disposal instructions.
C
www.honeywellhome.com
TO REMOVE WALLPLATE
PULL HERE
Wallplate
4
MCR33823
Wire Labels
C
Terminal designation
M32731
MCR31537