Honeywell RTH5100B User manual

Operating
Manual
RTH5100B
Non-Programmable Digital Thermostat
69-2330EFS-01

Read and save these instructions.
Need Help?
For assistance with this product please visit
http://DIYthermostats.honeywell.com
or call Honeywell Customer Care toll-free at 1-800-468-1502
® U.S. Registered Trademark.
US Patent No. D535,573 and other patents pending.
Copyright © 2009 Honeywell International Inc. All rights reserved.
Battery Holder
Press down and pull to remove
batteries.
Batteries should be replaced once
a year (see page 10).
M28300
NOTE: Remove battery holder; model number is on the battery holder.

RTH5100B
1 69-2330EFS—01
About your new thermostat
Thermostat features.................... 2
Quick reference to controls........ 4
Quick reference to display ......... 5
Operation
Select fan setting (Auto/On) ........6
Select system setting
(Heat/Cool) ...................................7
Adjust the temperature................8
Auto-changeover (heat/cool).......9
Built-in compressor protection ..10
Appendices
Battery replacement ................. 11
Customer assistance ................ 12
Accessories/
replacement parts..................... 12
In case of difficulty....................13
Limited warranty ....................... 15
Table of contents

Operating Manual
69-2330EFS—01 22
Congratulations on the purchase of your new Honeywell thermostat.
It has been designed to give you many years of reliable service and
easy-to-use, push-button climate control.
Features
• 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.
About your new thermostat

RTH5100B
3 69-2330EFS—01
Your new thermostat is pre-programmed and ready to go. Just
check the settings below and change if needed:
1. Select fan setting (Auto/On):
Preset to Auto ........................................To change, see page 6
2. Select system setting (Heat/Cool):
Preset to Heat ........................................To change, see page 7
This thermostat is ready to go!

Operating Manual
69-2330EFS—01 4
About your new thermostatQuick reference to controls
M28301
Digital display (see page 5). Battery holder (see page 10).
Temperature buttons
Press to adjust temperature
settings (see page 8).
Function buttons
Press to select the function displayed just above each button.
(Functions change depending on the task.)

RTH5100B
5 69-2330EFS—01
About your new thermostat
System
Cool
Cool On
Setting
Cool
Inside
72
72
Auto
Fan
M28302
Quick reference to display screen
Current inside temperature Temperature setting
Fan setting
Auto/On
(see page 6)
System setting
Heat/Cool/Auto/Off
(see page 7)
Function buttons
Press the button beneath each function to view or change settings.
(Functions change depending on the task.)
System status
Indicates system
is on. (Cool On or
Heat On.)

Operating Manual
69-2330EFS—01 6
About your new thermostat
System
CoolAuto
Fan
System
CoolOn
Fan
M28303
Select the 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.

RTH5100B
7 69-2330EFS—01
About your new thermostat
System
HeatAuto
Fan
System
CoolAuto
Fan
M28304
Select the system setting
Press the SYSTEM button to select
Heat, Cool or Off.
• 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.
CAUTION: EQUIPMENT DAMAGE HAZARD.
To prevent possible compressor damage, do
not operate cooling system when outdoor
temperature is below 50°F (10°C).

Operating Manual
69-2330EFS—01 8
System
Cool
Cool On
Setting
Cool
Inside
72
72
Auto
Fan
M28305
Adjust the temperature
Note: Make sure the
thermostat is set to the
system you want to control
(heat or cool).
Press to adjust temperature. Press s or tto adjust
the temperature.

RTH5100B
9 69-2330EFS—01
System
Auto Auto
Fan
MCR29531
Auto changeover (heat/cool)
Auto Changeover is a feature used in
climates where both air conditioning
and heating are used on the same
day. When the system is set to Auto,
the thermostat automatically selects
heating or cooling depending on the
indoor temperature.
Heat and cool settings must be at
least 3 degrees apart. The thermostat
will automatically adjust settings to
maintain this 3-degree separation
(called “deadband”).
The 3-degree separation between
heating and cooling set temperatures
is fixed, and cannot be changed.
Press until screen
displays “Auto”
Note: The Auto system setting
may not appear, depending
on how your thermostat was
installed.

Operating Manual
69-2330EFS—01 10
About your new thermostatBuilt-in compressor protection
This feature helps prevent damage
to the compressor in your air con-
ditioning or heat pump system.
Damage can occur if the compres-
sor is re-started too soon after
shutdown. This feature forces the
compressor to wait 5 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 flash-
ing and the compressor turns on.
Message flashes until safe
restart time has elapsed.
System
Cool
Cool On
Setting
Cool
Inside
72
72
Auto
Fan
M28306

RTH5100B
11 69-2330EFS—01
About your new thermostatBattery replacement
Install fresh batteries immediately
when the REPLACE BATT warning
begins flashing. The warning flash-
es about two months before the
batteries are depleted.
Even if the warning does not
appear, you should replace batter-
ies once a year, or before leaving
home for more than a month.
Batteries provide backup power to
the display during power interrup-
tions. All settings are permanently
stored in memory, and do not
require battery power.
Press down and pull to remove.
M28308
Insert fresh AAA alkaline
batteries, then reinstall
battery holder.
Replace Batt
M28307

Operating Manual
69-2330EFS—01 12
About your new thermostat
xxxxxxx xxxxxxx
M28310
For assistance with this product, please visit
http://DIYthermostats.honeywell.com.
Or call Honeywell Customer Care toll-free at
1-800-468-1502.
To save time, please remove the battery
holder and note your model number and
date code before calling.
Accessories/replacement parts
To order, please call Honeywell Customer
Care toll-free at 1-800-468-1502.
Battery holder .................Part No. 50000951-001
Cover plate assembly* ...Part No. 50001137-001
*Use to cover marks left by old thermostats.
M28309
Model number Date code
Customer assistance

RTH5100B
13 69-2330EFS—01
About your new thermostatIn case of difficulty
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 (see page 10).
Temperature
settings do
not change
Make sure heating and cooling temperatures are set to
acceptable ranges (see Installation Guide to adjust this
setting):
• Heat:40°to90°F(4.5°to32°C).
• Cool:50°to99°F(10°to37°C).

Operating Manual
69-2330EFS—01 14
About your new thermostatIn case of difficulty
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.
Other problems • If the above measures do not resolve the problem,
check the In Case of Difficulty section in your thermostat
Installation Guide.

RTH5100B
15 69-2330EFS—01
About your new thermostat1-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, 1885 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

Operating Manual
69-2330EFS—01 16
About your new thermostat1-year limited warranty
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. In Canada, write Retail Products ON15-02H, Honeywell Limited/
Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V 4Z9.

RTH5100B
17 69-2330EFS—01

® U.S. Registered Trademark.
© 2009 Honeywell International Inc.
69-2330EFS—01M.S.06-09
Automation and Control Solutions
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
http://DIYthermostats.honeywell.com
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Toronto, Ontario M1V 4Z9