Honeywell RTH8500 Series User manual

User Guide
Read and save these
instructions.
For help please visit
yourhome.honeywell.com
RTH8500
Wi-Fi Series
Wi-Fi Touchscreen
Programmable
Thermostat
In the box you will find
• Thermostat
• Wallplate (attached to thermostat)
• Screws and anchors
• Coin cell battery (inside the back
of the thermostat)
• Quick Start Guide
• Thermostat ID Card
• Wire labels
• User Guide
This is a legacy product document
supported by Resideo. It is no
longer manufactured

33-00133ES—01 ii
Welcome
Congratulations on your purchase of a
Honeywell Wi-Fi touchscreen 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.
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.
This thermostat contains a Lithium battery which may contain Perchlorate material.
Perchlorate Material—special handling may apply.
See www.dtsc.ca.gov/hazardouswaste/perchlorate
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.

1 33-00133ES—01
About your new thermostat
Home screen quick reference .....................2
Preset energy-saving schedules................. 2
Installation
Installing your thermostat............................ 3
Connecting to your Wi-Fi network............. 11
Registering your thermostat online ...........12
Operation
Setting the clock........................................14
Setting the fan........................................... 15
Selecting system mode............................. 15
Adjusting program schedules....................16
Overriding schedules temporarily .............16
Overriding schedules permanently ...........16
Setting vacation hold.................................17
Setting filter reminder intervals .................17
Cleaning the screen..................................18
Unregistering thermostat...........................18
Disconnecting Wi-Fi ..................................18
Special features ........................................19
Setting functions and options....................20
Appendices
Frequently asked questions ...................... 24
Message center messages.......................25
Troubleshooting......................................... 26
Limited warranty........................................27
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

33-00133ES—01 2
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. To change settings, simply press
the appropriate area lightly with your finger.
Unless you change the lighting function, the screen is always lit at low intensity. When you
touch the screen, the screen brightens.
Set clock
Message center
Select fan mode
Select system mode
Program schedules
Override schedule
Wi-Fi status
Schedule is on (does not
display when off)
Additional settings
Lock screen for cleaning
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Inside
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.
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 °
To change the settings, see pages 16–17.

3 33-00133ES—01
Setting up your thermostat
Setting up your Wi-Fi programmable touchscreen thermostat is easy. It is preprogrammed
and ready to go as soon as it is installed and registered.
Install your thermostat.
Connect it to your home wireless 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
Circuit
breaker
box
Heating/cooling
system power
switch

33-00133ES—01 4
C
C
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
terminal designation, write the
appropriate letter on a blank
sticky tag.
4 Remove wallplate.
Remove the old wallplate from
the wall after all wires have been
labeled and disconnected.
Blank tags
Sticky tag
Terminal
designation
C
C

5 33-00133ES—01
Installing your thermostat
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
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.
M31543
Y2
W2
K
RC
R
W
Y
G
C
RC
R
O/B
Y
G
C
HEAT PUMP
CONVENTIONAL
L
E/AUX
K
R
Y
C
W
G
Wallplate

33-00133ES—01 6
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.
Check the video section at wifithermostat.com
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 6. See “Glossary” on page 27 for further definition.
For a heat pump system, see page 7. See “Glossary” on page 27 for further
definition.
Installing your thermostat
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. See page 6.
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 9.
Labels don’t match? See alternate
wiring key on page 7.
Note: The wiring for your
application might be different
than the wiring from above.
Y2
W2
K
RC
R
W
Y
G
C
RC
R
O/B
Y
G
C
R
W
G
C
Y
HEAT PUMP
CONVENTIONAL
L
E/AUX
K
Remove metal jumper
only if you have both
Rand RC wires

7 33-00133ES—01
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. See page 6.
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 9.
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 page 8.
Note: The wiring for your
application might be different
than the wiring from above.
MCR33529
RC
R
O/B
Y
G
C
HEAT PUMP
L
E/AUX
K
R
O
G
Y
C
AUX
Y2
W2
K
Y2
W2
RC
R
W
Y
G
C
RC
R
W
Y
G
C
1
2
3
CONVENTIONAL
Metal J
umper
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.
See page 6.
Remove metal jumper connecting Rand RC only if you must connect both
Rand RC.
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.
Do not use Kterminal. For future use.
Alternate wiring key (conventional system)
2
3
1

33-00133ES—01 8
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. RC
R
O/B
Y
G
C
L
E/AUX
K
MCR33530A
Y2
RC
R
O
Y
G
C
1
2
3
3
47
6
5
HEAT PUMP
Metal Jumper
AUX
Alternate wiring key (heat pump system only)
Leave metal jumper between Rand RC terminals in place.
If your old thermostat had both Vand VR wires, check wifithermostat.com for help.
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. Set System Function 0190 to 0 (see page 22).
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 Y1, W1 and W2 wires, check wifithermostat.com for help.
This is the system monitor. If the monitor finds a problem, you will see a red light in the upper
right corner of the thermostat (shines through the cover).
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.
Do not use Kterminal. For future use.
2
3
1
4
5
6
7

9 33-00133ES—01
Installing your thermostat
8 Install battery.
Insert the coin cell battery
(included), observing the
correct polarity.
Note: A correctly inserted
battery will extend about halfway
out of the battery slot on the
thermostat, allowing for easier
removal.
This battery maintains time and
date during power outages. It
does not power the thermostat
(C wire required).
Thermostat interior
9 Attach thermostat to wallplate.
Align the thermostat to the wallplate
and then snap into place.
Thermostat
Wallplate
M31543
Y2
W2
K
RC
R
W
Y
G
C
RC
R
O/B
Y
G
C
HEAT PUMP
CONVENTIONAL
L
AUX
/E
K
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.
or
Circuit
breaker
box
Heating/cooling
system power
switch

33-00133ES—01 10
Installing your thermostat
11 Set date and time.
Touch sor tbuttons to change
displayed time and date.
Press and hold a button to quickly
change a setting.
Note:This thermostat will
automatically update for daylight
saving time (if observed in your area)
and all date/time information is stored.
If the thermostat is connected to
Wi-Fi and registered to Total Connect
Comfort, the current time is updated
from the internet.
Day
Time
Month
Year
12 Determine your heating/cooling system type.
Important! Heating/cooling system type must be set so that your
thermostat operates properly and does not damage your system.
12a If you have a traditional system (natural gas forced air with A/C),
your hermostat is set up by default to control this system.
12b If your system is:
• Conventional multistage heat and cool
• Any type of heat pump
• Hydronic
• Other
You MUST change the system type by setting system function 0170.
See page 22 to match your thermostat to your system type.
If you are not sure of your
heating/cooling system type
or have other questions,
go to wifithermostat.com
MORE
Inside
MCR3158
0
Heating/cooling system not turning
on? Refer to page 26 or FAQ at
wifithermostat.com/support
Congratulations! Your thermostat is operational.
13 Test your thermostat.
13a Press the SYSTEM button to change to
heating or cooling and begin operation.
13b For remote access to your thermostat,
continue to
“Connecting to your Wi-Fi
network” on page 11.

11 33-00133ES—01
Connecting to your Wi-Fi network
To complete this process, you must have a wireless device connected to your home
wireless network. Any of these device types will work:
• Tablet (recommended)
• Laptop (recommended)
• Smartphone
If you get stuck... at any point in this procedure, restart the thermostat by removing
the thermostat from the wallplate, wait for 5 seconds, and snap it back onto the
wallplate. Return to Step 1 in this procedure, which starts on page 11.
View the Wi-Fi Enrollment video at wifithermostat.com/videos
1 Connect to your thermostat.
1a Make sure the thermostat message center displays
Wi-Fi SETUP.
1b On the wireless device (laptop, tablet, smartphone),
view the list of available Wi-Fi networks
1c Connect to the network called
NewThermostat_123456 (the number will vary).
Note: If you are asked to specify a home, public, or
office network, select Home Network.
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Inside
2 Join your home network.
2a Open your web browser to access the Thermostat
Wi-Fi Setup page. The browser should
automatically direct you to the correct page; if it
does not, go to http://192.168.1.1
2b Find the name of your home network on this page
and select it.
Note: Some routers have enhanced features such as
guest networks; use your home network
2c Complete the instructions for joining your Wi-Fi
network and click on the Connect button.
(Depending on your network setup, you may see
an instruction such as Enter Password for your home network.)
Note: If you did not correctly connect to the thermostat, you may see
your home router page. If so, return to Step 1.
M31567

33-00133ES—01 12
Connecting to your Wi-Fi network
Note: If your Wi-Fi network does not appear in the list on the Thermostat Wi-Fi Setup
page:
• Try performing a network rescan by pressing the Rescan button. This is helpful in
areas with a lot of networks.
• If you are connecting to a hidden network, then enter the network SSID in the
textbox, select the encryption type from the drop down menu, and click on the
Add button. This manually adds the network to the top of the list. Click on the new
network in the list and enter the password if necessary. Click on Connect to join the
network.
3 Make sure your thermostat is connected.
The message center on your thermostat will
now display CONNECTING… for up to 30
seconds.
Look at the thermostat display. Verify that the
message center displays one of the following:
CONNECTION SUCCESSFUL
JOINED: [WI-FI NETWORK NAME]
YOU ARE ALMOST DONE
REGISTER AT TOTAL CONNECT
If you see one of these messages, continue on page 12.
Note: If you see CONNECTION FAILURE or Wi-Fi SETUP in the
message center, confirm you correctly entered your home network
password in step 2c. If correct, refer to the FAQ at wifithermostat.com/support
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Registering your thermostat online
M31570
To view and set your Wi-Fi thermostat
remotely, you must have a Total Connect
Comfort account. Use the following steps.
1 Open the Total Connect Comfort web site.
Go to mytotalconnectcomfort.com
View the Wi-Fi Thermostat Registration
video at wifithermostat.com/videos

13 33-00133ES—01
Registering your thermostat online
2 Login or create an account.
If you have an account,
click Login
– or –
click Create An Account
2a Follow the instructions on the screen.
2b Check your email for an activation
message from My Total Connect Comfort.
This may take several minutes.
Note: If you do not receive a response, check
your junk mailbox or use an alternate e-mail
address.
2c Follow activation instructions in the
email.
2d Log in.
M31571
3 Register your Wi-Fi thermostat.
After you are logged in to your Total Connect Comfort account,
register your thermostat.
3a Follow the instructions on
the screen. After adding your
thermostat location, you must
enter the thermostat’s unique
identifiers:
• MAC ID
• MAC CRC
Note: These IDs are listed on the
Thermostat ID Card included in the
thermostat package. The IDs are not
case sensitive.
® U.S. Registered Trademark.
© 2012 Honeywell International Inc.
69-2723EFS—01 M.S. 04-12
Printed in U.S.A.
HONEYWELL MODEL: RTH8580WF
MAC ID: MAC CRC:
69-2723EFS-01
Thermostat ID Card
Use the MAC ID and CRC ID to register
this product at mytotalconnectcomfort.com
Carte d’identification de thermostat
Utilisez l’identication MAC et l’identication CRC pour
enregistrer ce produit à mytotalconnectcomfort.com
Tarjeta de identificación del termostato
Utilice la identicación MAC y la identicación CRC para
inscribir este producto en mytotalconnectcomfort.com
MAC ID MAC CRC
3b When the thermostat is
successfully registered,
the Total Connect Comfort
registration screen will display a
SUCCESS message.
In the thermostat message
center you will see:
CONGRATULATIONS
SETUP COMPLETE!

33-00133ES—01 14
Registering your thermostat online
Your thermostat will display wireless signal
strength.
You can now control your thermostat from
anywhere through your laptop, tablet, or
smartphone.
Total Connect Comfort free app is
available for Apple®iPhone®, iPad®
and iPod touch®devices at iTunes®
or at Google Play®for all Android™
devices.
GET IT ON
Download on
iTunes
1 Press CLOCK to display setting arrows.
2 Press sor tto adjust the time. (You can
advance the time more quickly by holding the s
or tbuttons.)
3 Press DONE to save and exit (or press CANCEL to
exit without changing the time).
Note: This thermostat will automatically update for
daylight saving time (if observed in your area) and
all date/time information is stored. If the thermostat
is connected to Wi-Fi and registered to Total
Connect Comfort, the current time is updated from
the internet.
Note: To change the current week day format, see “Schedule Options” on page 21.
Setting the clock
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15 33-00133ES—01
1 Press FAN to select fan operation.
2 Press FAN again to select ON or AUTO (toggle
to re-select). The selected option blinks.
3 Press DONE to save setting. Your selection
appears under FAN.
ON:Fan is always on.
AUTO:Fan runs only when the heating or
cooling system is on.
MORE
Inside
MCR31553
Setting the fan
Selecting system mode
Note: The AUTO and EM HEAT
system settings may not
appear, depending on how
your thermostat was installed.
1 Press SYSTEM to display options.
2 Press SYSTEM again to select an option.
You may need to press two or three times to
make a selection—the selected option blinks.
3 Press DONE to save setting.
Possible system modes:
HEAT:Controls only the heating system.
COOL:Controls only the cooling system.
OFF:Heating/cooling systems are off.
AUTO:Selects heating or cooling
depending on the indoor temperature.
EM HEAT (heat pumps with aux. heat):
Controls auxiliary/emergency heat.
Compressor is locked out.
MORE
Inside
MCR31554

33-00133ES—01 16
MORE
SLEEP
SLEEP
MCR31555
Adjusting program schedules
1 Press SCHED, then EDIT. Screen displays day
buttons at top.
2 Press day buttons (MON–SUN) to select days.
3 Press sor tto set Wake time for selected
day(s).
4 Press sor tto set Heat and Cool
temperature for this time period.
5 Press another period (LEAVE, RETURN, SLEEP)
and set time and temperatures for each.
6 Press DONE to save and exit (or press CANCEL
to exit without saving changes).
Note: You can press CANCEL PERIOD to eliminate
any unwanted time period.
Overriding schedules temporarily
1 On the home screen, press sor tto
immediately adjust the temperature.
2 Adjust the time to when you want the hold to
end (the default is the end of the current period).
The new setting will be maintained until the time
shown under Hold Until. When the timer expires,
the schedule will resume, and the temperature
will return to the setting for the current time
period.
To cancel the temporary setting at any time, press
CANCEL (or SCHED). The program schedule will
resume.
MORE
Temporary Hold
Hold Until
Inside
MCR31556
Overriding schedules permanently
1 Press HOLD to permanently adjust the
temperature. This will turn off the program
schedule.
2 Whatever temperature you set will be
maintained 24 hours a day until you manually
change it or press CANCEL (or SCHED) to cancel
“Hold” and resume the program schedule.
MORE
Permanent Hold
Inside
MCR31557

17 33-00133ES—01
Setting vacation hold
Use this function to suspend the program schedule
while you are away for an extended period.
1 Press sor tto set the temperature.
2 Press sor tto set the time of day you want
the schedule to resume on the day you return.
3 Press HOLD twice. Hold Until appears.
4 Press sor tto select the number of days.
The selected temperature will be maintained 24
hours a day for the number of days you select.
After the selected number of days has elapsed, the
previously programmed schedule will resume at
the time you set.
Note: You can press CANCEL (or SCHED) to resume
normal schedule.
MORE
Hold Until
Inside
MORE
Hold Until
DAYS
MCR31558
Setting filter reminder intervals
MCR31559
SLEEP
FILTER
DAYS
CHANGE FILTER
Inside
RESET
MORE
If activated during installation, the filter reminder
alerts you with a message above the time when
it is time to replace your filter.
Press RESET after changing the filter, to restart
the timer.
To change the reminder interval:
1 Press MORE, then EDIT.
2 Press sor tto select the desired interval
(in days), then press DONE.
3 Press RESET.
4 Press DONE to save and exit.
Note: System setting function 0500 governs the
filter interval. See “Filter Change Reminder” on
page 23.

33-00133ES—01 18
Cleaning the screen
MORE
MCR31560
1 Press SCREEN to lock the screen for cleaning.
The screen will remain locked for 30 seconds
so you can clean the screen without changing
any settings.
2 After 30 seconds, press DONE to resume
normal operation, or press SCREEN again if
you require more time for cleaning.
Note: Do not spray any liquid directly on the
thermostat. Spray liquid onto a cloth, then use
the damp cloth to clean the screen. Use water
or household glass cleaner. Avoid abrasive
cleansers.
Unregistering thermostat
If you remove the thermostat from your Total
Connect Comfort website account (for example,
you’re moving and leaving the thermostat behind),
the message center will scroll UNREGISTERED
FROM TOTAL CONNECT for 3 minutes.
After that, it will alternate displaying REGISTER AT
TOTAL CONNECT, the MAC ID and the MAC CRC.
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Disconnecting Wi-Fi
Replacing your router
If you disconnect the thermostat from your Wi-Fi
network:
1 Enter system setup (see page 20).
2 Change setting 900 to 0 (see page 23).
The Message Center will display Wi-Fi
DISCONNECTED for 1 minute. After that it will display
Wi-Fi SETUP.
Re-connect to a Wi-Fi network by following the steps on page 11.
Turning Wi-Fi off
If you do not plan to control the thermostat remotely, you can remove the Wi-Fi SETUP
message from the screen:
1 Enter system setup (see page 20).
2 Change setting 890 to 0 (see page 23). Wi-Fi SETUP will be removed from the
screen. If you want to connect to the Wi-Fi network later, change setting 890 back to 1.
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Inside