Honeywell RTH5100B User manual

Owner’s Manual
Read and save these
instructions.
For help please visit
yourhome.honeywell.com
RTH5100B
Non-Programmable
Digital Thermostat
Installation is Easy
1. Label wires and remove your old thermostat
2. Install and wire your new thermostat
3. Set your new thermostat to match your heating/cooling system
• It is preset for the most common system
Do you need assistance? We are here to help.
Call 1-800-468-1502 for wiring assistance before returning
the thermostat to the store.
This thermostat works on 24 volt or 750 mV systems.
It will NOT work on multi-stage heat pump systems or
120/240 Volt systems.

2
NOTICE: To avoid possible compressor damage, do not run air
conditioner if the outside temperature drops below 50°F (10°C).
ATTENTION: MERCURY RECYCLING NOTICE
This product does not contain mercury. However,
this product may replace a product that contains
mercury. Mercury and products containing
mercury should not be discarded in household
trash.
For more information on how and where to
properly recycle a thermostat containing
mercury in the United States, please refer to the
Thermostat Recycling Corporation at
www.thermostat-recycle.org.
For mercury thermostat recycling in Canada,
please refer to Switch the Stat at
www.switchthestat.ca
NO MERCUR
Y
NE PAS JETER
LE MERCURE
Hg
M28300
Customer assistance
For assistance with this product, please visit
http://yourhome.honeywell.com.
Or call Honeywell Customer Care toll-free at
1-800-468-1502.
To save time, please note your model number
and date code before calling.
Remove battery holder; model number is on
the battery holder.
® U.S. Registered Trademark. Patents pending.
US Patent No. D535,573 and other patents pending.

3
Installation
Installation............................................3
Advanced Installation...........................7
About your new thermostat
Controls and Home screen
quick reference.....................................9
Compressor protection.......................12
Replace batteries...............................12
Appendices
Troubleshooting..................................13
Limited warranty.................................14
Table of contents
1 Turn Off Power to Heating/Cooling System
or
M31535
Circuit breaker
box Heating/cooling system power switch
2 Remove Old Thermostat
Remove old thermostat but leave wallplate with wires attached.
Do not remove wallplate yet
C
C
MCR33823
Terminal
designation
If you have an older thermostat with a
sealed mercury tube, turn to page 2
for proper disposal instructions.

4
3 Label Wires with Tags
Label the wires using the supplied wire labels as you disconnect them.
M28100
5 Mount Wallplate
Mount the new wallplate using the included screws and anchors.
Drill 3/16-in. holes for drywall
Drill 3/32-in. holes for plaster
MCR29533
4 Separate Wallplate from New Thermostat
Remove wallplate from the new thermostat and mount onto wall.
M29532
Wallplate
Wire Labels
Terminal designation
C
C
MCR31537

5
Remove metal
jumper if you
have both Rand
Rc wires.
MCR29534
Thermostat does not work on Heat Pumps with auxiliary/backup heat.
We are here to help. Call 1-800-468-1502 for wiring assistance.
6 Connect Wires
Simply match wire labels.
If labels do not match letters on the thermostat, check “Alternate Wiring” on
page 5 and connect to terminal as shown (see notes, below).
Alternate Wiring
If wires will be connected to both
Rand Rc terminals, remove metal
jumper
Do not connect both Oand B, If
you have a heat pump. Connect
O wire to O/B W. Wrap B wire with
electrical tape and do not use.
Do not use C, X or B. Wrap bare
end of wire with electrical tape.
Rc
R
Y
NOT
USED
O/B W
G
DO
NOT
CONNECT
MCR29548
C
Rc
R
W
Y
G
OR R
OR RH 4V
OR Y1 M
OR W1 H O
B
OR F
OR X B

6
7 Install Batteries
Install two AAA alkaline batteries.
8 Install Thermostat onto
Wallplate
Install thermostat onto the wallplate on
the wall.
Back of thermostat
MCR29535
MCR29536
M31544
or
Circuit breaker box Heating/cooling system
power switch
9 Turn Power Back On
Turn the power back on to the
heating/cooling system.

7
10 If your system type is...
If your system type is:
qSingle Stage Heat and Cool
Congratulations, you’re done!
If your system type is:
qHeat Pump* without Backup Heat
qHeat Only
Continue with Advanced Installation to match your thermostat to your system
type.
*Heat Pump—an air conditioner that provides cooling in the summer, and also
runs in reverse in the winter to provide heating.
If you are not sure of your system type or if you have other
questions, call us toll-free at 1-800-468-1502.
This thermostat works on 24 volt or 750 mV systems. It will NOT work on multi-
stage heat pump systems or 120/240 Volt systems.
Advanced Installation
Enter System Setup
To enter system setup, press and hold both
the sand FAN buttons until the display
changes (approximately 5 seconds).
Changing Settings
1. Press the sor tbutton to change the
setting.
2. Press NEXT to advance to the next
function.
3. Press DONE to exit and save settings.
MCR29537
Function Setting
Next
1
0
Done
MCR29538

8
Function
Description
Press the sor tbutton to Setting
1 select the type of system you
have in your home
0 Heating and cooling: Gas, oil or electric heating with
central air conditioning.
1 Heat pump: Outside compressor provides both heating
and cooling.
2 Heating only: Gas, oil or electric heating without central
air conditioning.
3 Heating only with fan: Gas, oil or electric heating
without central air conditioning. (Use this setting if you
could turn the fan on and off with a fan switch on your
old thermostat.)
2 select whether your
changeover valve is used in
heating or cooling
0 Cooling changeover valve: Use this setting if you
connected a wire labeled “O” to the O/B W wire terminal.
1 Heating changeover valve: Use this setting if you
connected a wire labeled “B” to the O/B W wire terminal.
3 select your heating system
and fan operation
0 Gas or oil heat: Use this setting if you have a gas or oil
heating system (system controls fan operation).
1 Electric heat: Use this setting if you have an electric
heating system (thermostat controls fan operation).
5 select your heating system
and optimize its operation
5 Gas or oil furnace: Use this setting if you have a
standard gas or oil furnace that is less than 90%
efcient.
9 Electric furnace: Use this setting if you have any type
of electric heating system.
3 Hot water or high-efficiency furnace: Use this setting
if you have a hot water system or a gas furnace of
greater than 90% efciency.
1 Gas/oil steam or gravity system: Use this setting if
you have a steam or gravity heat system.
12 select Manual or Auto
Changeover
0 Manual Changeover: (Heat/Off/Cool)
1 Automatic Changeover: (Heat/Off/Cool/Auto)
Automatically turns on heat or cool based on room
temperature.
CAUTION: To avoid possible compressor
damage, do not use Auto Changeover if the
outside temperature drops below 50 ºF (10 ºC).
NOTE: System maintains a minimum 3 ºF
difference between heat and cool settings.
14 select Fahrenheit or Celsius
temperature display
0 Fahrenheit temperature display (°F)
1 Celsius temperature display (°C)
27 select maximum heat
temperature setting
40 – 90 Maximum heat temperature setting (°F)
(4.5 to 31.5°C)
28 select minimum cool
temperature setting
50 – 99 Minimum cool temperature setting (°F)
(10.5 to 37°C)

9
Thermostat controls
M28301
Digital display Battery holder
Temperature buttons
Press to adjust
temperature settings.
Function buttons
Press to select the function displayed just above each button.
(Functions change depending on the task.)
About your new thermostat
Your new Honeywell thermostat has been designed to give you many years of
reliable service and easy-to-use, push-button climate control.
• Large, clear, backlit display is easy to read — even in the dark.
• Displays both room temperature and temperature setting.
• Removable battery holder for fast, easy replacement.
• Built-in compressor protection.

10
System
Cool
Cool On
Setting
Cool
Inside
72
72
Auto
Fan
M28305
Adjust the temperature
Press sor tto adjust the
temperature.
NOTE: Make sure the thermostat
is set to the system you want to
control (heat or cool).
Display screen
System
Cool
Cool On
Setting
Cool
Inside
72
72
Auto
Fan
M28302
Current inside temperature Temperature setting
System status
Indicates system is on.
(Cool On or Heat On.)
System setting
Press the SYSTEM
button to select Heat,
Cool or Off.
Fan setting
Press the FAN button to
select Auto or On.
In “Auto” mode (the most
commonly used setting), the fan
runs only when the heating or
cooling system is on. If set to “On,”
the fan runs continuously.
• Heat: Thermostat controls only the heating
system.
• Cool: Thermostat controls only the cooling
system.
• Auto: Thermostat automatically selects
heating or cooling depending on the
indoor temperature.
• Off: Heating and cooling systems are off.

11
Auto Changeover
Use this feature in climates where both air conditioning and heating are used on
the same day. When the system mode is in Auto, the thermostat automatically
selects heating or cooling depending on the indoor temperature.
While in the Auto mode, if a schedule override takes place (temporarily or
permanently) the thermostat will automatically adjust the cooling and heating
settings to maintain a 3-degree separation between the cool and heat settings.
For example, if the heat temperature is raised to where it gets within 3-degrees
of the cool setting, the display will show an up arrow next to “cool” to show the
thermostat is raising the cool setting up to maintain a 3-degree separation.
Press the Select Heat/Cool button to select between the heat and cool to view/
adjust either mode.
System
Auto Auto
Fan
MCR29531
NOTICE: To avoid possible
compressor damage, do not use
Auto Changeover if the outside
temperature drops below 50ºF (10ºC).

12
Built-in compressor protection
This feature helps prevent damage to
the compressor in your air conditioning
or heat pump system.
Damage can occur if the compressor is
restarted too soon after shutdown. This
feature forces the compressor to wait a
few minutes before restarting.
During the wait time, the display will
flash the message Cool On (or Heat
On if you have a heat pump). When
the safe wait time has elapsed, the
message stops flashing and the
compressor turns on.
System
Cool
Cool On
Setting
Cool
Inside
72
72
Auto
Fan
M28306
Battery replacement
Install fresh batteries immediately when
REPLACE BATTERY begins flashing.
The warning flashes about two months
before the batteries are depleted.
Replace batteries once a year, or
when you will be away for more than a
month.
If batteries are inserted within two
minutes, the time and day will not
have to be reset. All other settings are
permanently stored in memory and do
not require battery power.
Press down and pull to
remove.
Insert fresh AAA
alkaline batteries, then
reinstall battery holder.
M28308
Replace Batt
M28307

13
Troubleshooting
If you have difficulty with your thermostat, please try the following suggestions.
Most problems can be corrected quickly and easily.
Display is blank • Make sure fresh AAA alkaline batteries are correctly installed
Temperature
settings do not
change
Make sure heating and cooling temperatures are set to acceptable ranges:
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
Cannot change
system setting to
Cool
• Check Function 1: System Type to make sure it is set to match your heating
and cooling equipment
Fan does not turn
on when heat is
required
• Check Function 3: Heating Fan Control to make sure it is set to match your
heating equipment
Heating or cooling
system does not
respond
• Press SYSTEM button to set system to Heat. Make sure the temperature is
set higher than the Inside temperature.
• Press SYSTEM button to set system to Cool. Make sure the temperature is
set lower than the Inside temperature.
• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
• Wait 5 minutes for the system to respond.
“Cool On” or
“Heat On” is
flashing
• Compressor protection feature is engaged. Wait 5 minutes for the system to
restart safely, without damage to the compressor.
Heat pump issues
cool air in heat
mode, or warm air
in cool mode
• Check Function 2: Heat Pump Changeover Valve to make sure it is properly
configured for your system
Heating and
cooling equipment
running at the
same time (or heat
does not turn off)
• Check Function 1: System Type to make sure it is set to match your heating
and cooling equipment.
• Grasp and pull thermostat away from wallplate. Check to make sure bare
wires are not touching each other.
Heating system
is running in cool
mode
• Check Function 1: System Type to make sure it is set to match your heating
and cooling equipment
For assistance with this product, please visit http://yourhome.honeywell.com or
call Honeywell Customer Care toll-free at 1-800-468-1502.

Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
yourhome.honeywell.com
® U.S. Registered Trademark.
© 2015 Honeywell International Inc.
33-00140EF—01 M.S. 08-15
Printed in U.S.A.
33-00140EF-01
1-year limited warranty
Honeywell warrants this product, excluding battery, to be free from defects in the
workmanship or materials, under normal use and service, for a period of one (1) year
from the date of purchase by the consumer. If at any time during the warranty period the
product is determined to be defective or malfunctions, Honeywell shall repair or replace it
(at Honeywell’s option).
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase, to the place from which
you purchased it; or
(ii) call Honeywell Customer Care at 1-800-468-1502. Customer Care will make the
determination whether the product should be returned to the following address:
Honeywell Return Goods, Dock 4 MN10-3860, 1985 Douglas Dr. N., Golden Valley, MN
55422, or whether a replacement product can be sent to you.
This warranty does not cover removal or reinstallation costs. This warranty shall not apply
if it is shown by Honeywell that the defect or malfunction was caused by damage which
occurred while the product was in the possession of a consumer.
Honeywell’s sole responsibility shall be to repair or replace the product within the terms
stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE
OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES
RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY,
EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states
do not allow the exclusion or limitation of incidental or consequential damages, so this
limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON
THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS
HEREBY LIMITED TO THE ONE-YEAR DURATION OF THIS WARRANTY.
Some states do not allow limitations on how long an implied warranty lasts, so the above
limitation may not apply to you. This warranty gives you specific legal rights, and you may
have other rights which vary from state to state.
If you have any questions concerning this warranty, please write Honeywell Customer
Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502.

RTH5100B
Veuillez lire le mode
d’emploi et le conserver en
lieu sûr.
Pour obtenir de l’aide veuillez
visiter yourhome.honeywell.com
Manuel du
propriétaire
Thermostat
numérique
non programmable
L’installation est facile
1. Étiquetage des fils et retrait de l’ancien thermostat
2. Installation et raccordement du nouveau thermostat
3. Configuration du nouveau thermostat pour correspondre à votre système de
chauffage/climatisation
• Il est préréglé en prévision des systèmes les plus communs
Besoin d’aide? Nous sommes à votre service
Composer le 1-800-468-1502 pour obtenir de l’aide au
raccordement avant de retourner le thermostat au magasin.
Ce thermostat convient aux systèmes alimentés par du
courant 24 volts ou 750 millivolts. Il ne convient pas aux
systèmes multiétages à thermopompe ni aux systèmes
alimentés par du courant 120/240 volts.

2
AVIS : Pour éviter d’endommager le compresseur, ne faites pas
fonctionner le climatiseur si la température extérieure est inférieure à
10 °C (50 °F).
ATTENTION : AVIS RELATIF AU RECYCLAGE
DU MERCURE
Ce produit ne contient aucun mercure.
Cependant, ce produit peut remplacer un produit
qui contient du mercure. Le mercure et les
produits contenant du mercure ne doivent pas
être jetés aux ordures ménagères.
Pour obtenir plus d›informations pour savoir
comment et où recycler adéquatement un
thermostat contenant du mercure aux États-
Unis, consultez l›organisme de recyclage des
thermostats (Thermostat Recycling Corporation) à
www.thermostat-recycle.org.
Pour le recyclage de thermostats contenant
du mercure au Canada, consultez l›organisme
Switch the Stat à www.switchthestat.ca
NO MERCUR
Y
NE PAS JETER
LE MERCURE
Hg
Services à la clientèle
Pour obtenir de l’aide avec ce produit, veuillez
consulter le site
http://yourhome.honeywell.com.
ou vous adresser aux Services à la clientèle de
Honeywell en composant le 1-800-468-1502.
Pour gagner du temps, veuillez prendre en note le
numéro de modèle et de code de date du thermostat
avant d’appeler.
Retirer le porte-piles; le numéro de modèle
est indiqué sur le porte-piles.
M28300
® Marque de commence enregistrée aux États-Unis. Brevets en instance.
Brevets US nos D535,573 et autres brevets en instance.

3
Installation
Installation............................................3
Guía de instalación avanzada..............7
À propos du thermostat
Aide-mémoire sur les commandes
et l’écran d’accueil ...............................9
Protection du compresseur................11
Remplacement des piles....................12
Annexes
Dépannage.........................................13
Garantie limitée..................................14
Table des matières
1 Couper le courant du système de chauffage/de
climatisation
ou
M31535
Disjoncteur Interrupteur
d’alimentation du système
de chauffage/refroidissement
2 Retirer l’ancien thermostat
Retirer l’ancien thermostat, mais laisser en place la plaque murale et les fils
sans les détacher.
Laisser la plaque
de montage en
place
C
C
MCR33823
Désignation de
la borne
Si vous possédez un thermostat plus ancien à tube
de mercure scellé, allez à la page 2pour les
instructions de mise au rebut correctes.

4
M29532
Plaque de montage
M28100
3 Étiqueter les fils
Étiqueter les fils à l’aide des étiquettes fournies à mesure que les fils sont
débranchés.
4 Séparer la plaque murale du nouveau thermostat
Retirer la plaque murale du nouveau thermostat et l’installer au mur.
5 Installer la plaque
Installer la nouvelle plaque murale à l’aide des vis et des chevilles d’ancrage
fournies.
Percer des trous de 3/16 po si le mur est en placoplâtre
Percer des trous de 3/32 po si le mur est en plâtre
MCR29533
Étiquettes de fils
Désignation de la borne
C
C
MCR31537

5
Retirer le cavalier
en métal s’il y a à la
fois les fils « R» et
« Rc ».
MCR29534
Le thermostat ne fonctionne pas sur les thermopompes avec chauffage
auxiliaire/de secours.
Composer le 1-800-468-1502 pour obtenir de l’aide au cours du raccordement.
6 Raccorder les fils
Il suffit ensuite de faire correspondre les fils avec les étiquettes.
Si les étiquettes ne correspondent pas aux lettres du thermostat, consulter
“Autre option de câblage” au page 5 (voir les notes dessous).
Autre option de câblage
Si des fils seront raccordés
aux bornes Ret Rc, enlever le
cavalier en métal.
Ne pas raccorder Oet Bs’il
s’agit d’une thermopompe.
Raccorder le fil Oà O/BW.
Enrouler du ruban isolant sur le fil
Bet ne pas l’utiliser.
Ne pas se servir de C, B ou X.
Enrouler du ruban isolant sur le
bout dénudé du fil.
Rc
R
Y
NON
UTILISÉ
O/B W
G
NE PAS
RACCORDER
MFCR29548
C
Rc
R
W
Y
G
OU R
OU RH 4V
OU Y1 M
OU W1 H O
B
OU F
OU X B

6
8 Fixer le thermostat à la
plaque murale
Installer le thermostat sur la plaque
murale fixée au mur.
Dos du thermostat
MCR29535
9 Rétablir l’alimentation
électrique
Rétablir l’alimentation électrique
du système de chauffage-
refroidissement.
MCR29536
7 Installer les piles
Installer 2 piles alcalines AAA à l’arrière du thermostat.
M31544
ou
Disjoncteur Interrupteur d’alimentation
du système de
chauffage/refroidissement