Honeywell RTH6400 Series User manual

RTH6400 Series
Programmable Thermostat
69-2210EF-03
Quick Installation Guide

69-2210EF—03 ii
Installation is Easy
Label wires and remove your old thermostat
Install and wire your new thermostat
Set your new thermostat to match your heating/cooling
system
– It is preset for the most common system
We are here to help.
Call 1-800-468-1502 for wiring
assistance before returning
the thermostat to the store.

1 69-2210EF—03
1Turn Off Power to Heating/
Cooling System
M28097

69-2210EF—03 2
Remove old thermostat but leave wallplate with
wires attached.
2Remove Old Thermostat
M28099
Is there a sealed tube containing
mercury? If so, see back cover
for proper disposal instructions.
Leave wallplate
in place
Old thermostat
Cover

3 69-2210EF—03
Label the wires using the supplied wire labels as you
disconnect them.
3Label Wires with Tags
Wire Labels
M28100
M28093

69-2210EF—03 4
M28343
4Separate Wallplate from
New Thermostat
Wallplate
Pull here to remove wallplate from new
thermostat.
Remove battery holder.

5 69-2210EF—03
M2834
M28344
Insert quick reference card into slot in back of thermostat.
Thermostat
5Insert Quick Reference Card

69-2210EF—03 6
Mount the new wallplate using the included screws
and anchors.
6Mount Wallplate
M28345
Drill 3/16-in. holes for drywall
Drill 3/32-in. holes for plaster

7 69-2210EF—03
Simply match wire labels.
Remove metal jumper if
you have both Rand Rc
wires.
M27513
7Connect Wires
Labels don’t match? See page 21.
Have a Heat Pump system? See page 14.
We are here to help.
Call 1-800-468-1502 for wiring assistance.

69-2210EF—03 8
Install two AA alkaline batteries.
M28346
Back of thermostat
8Install Batteries