Honeywell RTH6500 User manual

User Guide
Read and save these
instructions.
For help please visit
yourhome.honeywell.com
RTH6500
Wi-Fi Series
Wi-Fi Programmable
Thermostat
In the box you will find
• Thermostat
• Wallplate (attached to thermostat)
• Screws and anchors
• Quick Start Guide
• Thermostat ID Card
• Wire labels
• User Guide
• Quick Reference Card

69-2715EF—07 ii
This thermostat works with common 24 volt systems such as forced air, hydronic,
heat pump, oil, gas, and electric. It will not work with millivolt systems, such as a gas
fireplace, or with 120/240 volt systems such as baseboard electric heat.
MERCURY NOTICE: Do not place your old thermostat in the trash if it contains
mercury in a sealed tube. Contact the Thermostat Recycling Corporation at www.
thermostat-recycle.org or 1-800-238-8192 for information on how and where to
properly and safely dispose of your old thermostat.
NOTICE: To avoid possible compressor damage, do not run air conditioner if the
outside temperature drops below 50°F (10°C).
Need help?
Visit wifithermostat.com or call 1-855-733-5465 for assistance before returning the
thermostat to the store.
Welcome
Congratulations on your purchase of a
Honeywell Wi-Fi programmable thermostat.
When registered to Honeywell’s Total Connect
Comfort Solutions, you can remotely monitor
and control the heating and cooling system
in your home or business—you can stay
connected to your comfort system wherever
you go.
Honeywell’s Total Connect Comfort is the
perfect solution if you travel frequently, own
a vacation home, a business or manage an
Investment property or if you are simply looking
for peace of mind.

69-2715EF—07 1
About your new thermostat
Controls and Home screen
quick reference............................................2
Preset energy-saving schedules................. 2
Installation
Installing your thermostat............................ 3
Connecting to your Wi-Fi network............. 10
Registering your thermostat online ........... 12
Operation
Setting the clock........................................14
Setting the fan........................................... 14
Selecting system mode............................. 14
Adjusting program schedules....................15
Overriding schedules temporarily .............15
Overriding schedules permanently ...........15
Unregistering thermostat...........................16
Disconnecting Wi-Fi ..................................16
Special features ........................................17
Setting functions and options....................18
Appendices
Frequently asked questions ......................20
Troubleshooting.........................................21
Limited warranty........................................24
Table of contents
Features of your Wi-Fi thermostat
With your new thermostat, you can:
• Connect to the Internet to monitor and control your heating/cooling system
• View and change your heating/cooling system settings
• View and set temperature and schedules
• Receive alerts via email and get automatic upgrades
Your new thermostat provides:
• Smart Response Technology
• Compressor protection
• Heat/cool auto changeover

69-2715EF—07 2
Controls and home screen quick reference
Once your Wi-Fi thermostat is installed, it will display the home screen. Portions of this
display will change depending on how you are viewing it.
The screen lights when you press any button. It stays lit for 8 seconds after you complete
changes.
M31586
HOLD
Set up messages
describe steps in the
Wi-Fi set up process
Wi-Fi status
Set clock, day,
or schedule
Select fan
settings
Additional
settings
Temperature adjustment
buttons
Permanent override
button
Select system
mode
Preset energy-saving schedules
This thermostat is pre-set with energy-saving program settings for four time periods.
Using the default settings can reduce your heating/cooling expenses if used as directed.
Savings may vary depending on geographic region and usage. To change the settings,
see pages 15.
Default Heat Settings Default Cool Settings
WAKE
6:00 am 70 °78 °
LEAVE
8:00 am 62 °85 °
RETURN
6:00 pm 70 °78 °
SLEEP
10:00 pm 62 °82 °

3 69-2715EF—07
Setting up your thermostat
Setting up your Wi-Fi programmable thermostat is easy. It is preprogrammed and ready to
go as soon as it is installed and registered.
Install your thermostat.
Connect your home Wi-Fi network.
Register online for remote access.
Before you begin, you may want to watch a brief installation video. Use
the QR Code®at the front of this guide, or go to wifithermostat.com/support
2
3
1
Installing your thermostat
You might need the following tools to install this thermostat:
• No. 2 Phillips screwdriver
• Small pocket screwdriver
• Pencil
• Level (optional)
• Drill and bits (3/16” for drywall,
7/32” for plaster) (optional)
• Hammer (optional)
• Electrical tape (optional)
1 Switch OFF power to your
heating/cooling system.
Important! To protect your equipment,
switch OFF the power to your heating/
cooling system at the breaker box or
the system switch.
or
M31535
Circuit breaker
box
Heating/cooling
system power
switch

69-2715EF—07 4
C
C
MCR33823
If you have an older thermostat with a
sealed mercury tube, turn to page ii
for proper disposal instructions.
Terminal
designation
Installing your thermostat
2 Remove old thermostat faceplate
and leave wires connected.
2a Take a picture of the wire
connections for later reference.
2b If no wire is connected to a
terminal labeled C or no C
terminal exists on the old
thermostat, view the Alternate
Wiring videos at
wifithermostat.com/videos
Important! C wire is required and
is the primary power source for
your thermostat. Without a C wire,
your thermostat will not power up.
3 Label wires.
Do not label by wire color. Use
the supplied sticky tags to label
each wire as you disconnect it.
Label wires according to the old
thermostat terminal designations,
not by wire color.
Note: If no tag matches a wire
terminal label, write the terminal
label on a blank tag.
4 Remove wallplate.
Remove the old wallplate from
the wall after all wires have been
labeled and disconnected.
Blank sticky
tags
Sticky tags
Terminal
designation
C
C
MCR31537
5 Separate Wi-Fi thermostat and its
wallplate.
On your new thermostat, grasp the
finger holds on the top and bottom of
the wallplate with one hand and the
thermostat (front) with the other hand.
Pull pieces apart.
Thermostat
Wallplate (back view)
Finger holds
M33856
PULL HERE
TO REMOVE
PULL HERE
TO REMOVE

5 69-2715EF—07
Installing your thermostat
6 Mount wallplate for Wi-Fi 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.
Wallplate
Important! The Wi-Fi thermostat requires a C wire to operate. The C, or common, wire
brings 24 VAC power to the thermostat. Many older mechanical or battery operated
thermostats do not require a C wire. If you don’t have a C wire, try:
• Looking for an unused wire that is pushed into the wall. Connect that wire to C and
check that it is connected to the 24 VAC common at your heating/cooling system.
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 wifithermostat.com/videos
Wiring
For conventional heating/cooling systems (natural gas, oil or electric furnace, air
conditioner), see page 5. See “Glossary” on page 23 for further definition.
For a heat pump system, see page 7. See “Glossary” on page 23 for further
definition.
MCR33857
Wiring (conventional system)
7A Wire the Wi-Fi thermostat to your conventional system.
a Starting with the C Wire, match the sticky tag on the
wire to the terminal labels.
You must have a C wire.
b Loosen screw, insert wire on inside edge
of terminal, then tighten screw.
c Verify wire is firmly secured by gently
pulling on wire.
d Repeat steps a–c for all other wires.
e Push any excess wire back into the wall
opening after all wires are installed.
f Continue to page 8.
Labels don’t match? See alternate
wiring key on pages 6.
W2 GWYR RCK Y2 C
MCR33878
Y
HEAT PUMP
CONVENTIONAL
AUX/E GO/B YRRCK LC
C
G
W
R
Remove metal jumper
only if you have both
Rand RC wires
Note: The wiring for your
application might be different
from the wiring shown above.

69-2715EF—07 6
Installing your thermostat
Wiring (heat pump system only)
7B Wire Wi-Fi thermostat to your heat pump.
a Starting with the C Wire, match the sticky tag on the wire to the terminal labels.
You must have a C wire.
b Loosen screw, insert wire on inside edge
of terminal, then tighten screw.
c Verify wire is firmly secured by gently
pulling on wire.
d Repeat steps a–c for all other wires.
e Push any excess wire back into the wall
opening after all wires are installed.
f Continue to page 8.
Note: If old thermostat has separate wires on AUX and
E, place both wires into the E/AUX terminal.
If old thermostat has wire on AUX with a jumper to E,
place wire on E/AUX terminal. No jumper is required.
Labels don’t match? See alternate
wiring key on pages 7.
MCR33877
G
O
Y
R
HEAT PUMP
AUX/E GO/B YRRCK LC
Aux
Note: The wiring for your
application might be different
from the wiring shown above.
Alternate wiring (conventional system)
Use this if your wire labels don’t match the terminal labels.
Note: You must have
a C wire or equivalent.
Do not use Kterminal. For future use.
If your old thermostat had both Rand RH wires, remove metal jumper.
Connect the Rwire to the RC terminal, and the RH wire to the Rterminal.
Remove metal jumper connecting Rand RC only if you must connect both
Rand RC.
Alternate wiring key (conventional system)
2
3
1
Y2
R
4M
V
RHY1
H
W1F
RYWG
RC
W2
W2 GWYRRC
Y2 C
MCR33885
CONVENTIONAL
C
B
C1
X
K
1
2
3

7 69-2715EF—07
Installing your thermostat
Alternate wiring (heat pump system only)
Use this if your wire labels don’t match the terminal labels.
Note: You must have
a C wire or equivalent.
See page 6.
Alternate wiring key (heat pump system only)
Do not use Kterminal. For future use.
If old thermostat has separate wires on AUX and E, place both wires into the E/AUX terminal. If
old thermostat has wire on AUX with a jumper to E, place wire on E/AUX terminal. No jumper is
required.
If your old thermostat had an Owire and not a Bwire, attach the Owire to the O/B terminal.
If your old thermostat had separate Oand Bwires, attach the Bwire to the Cterminal. If
another wire is attached to the Cterminal, check wifithermostat.com for help. Attach the Owire
to the O/B terminal.
If your old thermostat had separate Y1, W1 and W2 wires, check wifithermostat.com for help.
If your old thermostat had both Vand VR wires, check wifithermostat.com for help.
Leave metal jumper between Rand RC terminals in place.
2
3
1
4
5
6
7
MCR33886
EAUX
XW FH
B
W1
W2
X2
LOG
F
C
R
VRM
VY1
B
X
RY
RC
HEA
T PUMP
AUX/E GO/B YRRCK LC
1
2
3
4
7
6
5
4

69-2715EF—07 8
Installing your thermostat
8 Insert quick reference card.
Fold quick reference card
along score lines, and slide
it into the slot on the back of
the thermostat.
9 Attach thermostat to wallplate.
Align the thermostat to the wallplate
and then snap into place.
Back of thermostat
Quick
reference
card
MCR33916
M33860
HOLD
MCR33858
10 Switch heating/cooling system ON.
Important!
10a Verify that the C wire is
connected at the thermostat
and at the heating/cooling
system.
10b Make sure the heating/
cooling system door is firmly
secured.
10c Switch power back ON for
your heating/cooling system
at the breaker box or its
power switch.
M31544
or
Circuit breaker
box
Heating/cooling
system power
switch