Honeywell Home Smart RTH9585WF User Manual page 9

Note: Wrap the wires around a pencil
to prevent them from falling back into
the wall.
4 Mount wallplate for thermostat.
Mount your new wallplate using
screws and anchors included with
the thermostat.
If necessary:
Drill 3/16-in holes for drywall.
Drill 7/32-in holes for plaster.
Note:
You may be able to use your
existing wall anchors. Hold the
wallplate up to the existing anchors to
check for alignment.
Installing your thermostat
Important! This thermostat requires a C, or common, wire for power. The C, or common, wire
brings 24 VAC power to the thermostat. If you are replacing an existing thermostat, it might
not have a C wire connected to it. Many older mechanical or battery operated thermostats do
not require a C wire. See the C Wire Addendum document included in this package for more
information.
Note: Not all heating/cooling systems label the 24 VAC common C. Check your system
manual or contact the manufacturer to find out which terminal is the 24 VAC common.
View the Alternate Wiring videos at resideo.com
Wiring
For conventional
conditioner), see page 8. See "Glossary" on page 39 for further definition.
For a heat pump system, see page 9. See "Glossary" on page 39 for further
definition.
heating/cooling systems (natural gas, oil or electric furnace, air
7
LEVEL
HERE
W-
C
O/B
Y
K
G
Rc
W2-
R
Aux/E
Y2
L
Wallplate
69-2715EF—07
MCR34499