Honeywell RTH5100B User manual

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

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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.