Owner's Manual
Page 1
Registered Trademark © 2004 Honeywell International Inc. Operating Instructions RTH5100B Non-programmable Thermostat OPERATING INSTRUCTIONS The RTH5100B Thermostat provides electronic control of 24 Vac single stage heating and cooling systems or 750 mV heating systems. For assistance with your Honeywell product please visit www.honeywell.com/yourhome or call Honeywell Customer Care toll free at 1-800-468-1502. All Rights Reserved • Patents Pending 69-1722 Read and Save these Instructions ® U.S.
Registered Trademark © 2004 Honeywell International Inc. Operating Instructions RTH5100B Non-programmable Thermostat OPERATING INSTRUCTIONS The RTH5100B Thermostat provides electronic control of 24 Vac single stage heating and cooling systems or 750 mV heating systems. For assistance with your Honeywell product please visit www.honeywell.com/yourhome or call Honeywell Customer Care toll free at 1-800-468-1502. All Rights Reserved • Patents Pending 69-1722 Read and Save these Instructions ® U.S.
Owner's Manual
Page 2
Contents Features 3 Get to Know Your Thermostat 4 Thermostat 4 Display 5 Operate Your Thermostat 6 Set System Setting 6 Set Fan Setting 7 Change Temperature Setting 8 Replace Batteries 9 Review Battery Tips 13 Built-in Compressor Protection 14 Accessory/Replacement Parts 15 Troubleshooting Tips 16 Customer Assistance 21 Limited One-Year Warranty 22 69-1722 2
Contents Features 3 Get to Know Your Thermostat 4 Thermostat 4 Display 5 Operate Your Thermostat 6 Set System Setting 6 Set Fan Setting 7 Change Temperature Setting 8 Replace Batteries 9 Review Battery Tips 13 Built-in Compressor Protection 14 Accessory/Replacement Parts 15 Troubleshooting Tips 16 Customer Assistance 21 Limited One-Year Warranty 22 69-1722 2
Owner's Manual
Page 3
Simultaneously displays both room temperature and temperature setting. • Easy Change Battery Holder. • Built-in the dark. • Precise Comfort Control: ±1ºF of your set temperature. • Simplified Operation: Soft-key controls. Features • Large, Clear, Backlit Display: Easy-to-see and read-even in Compressor Protection: Minimum-off timer protects compressor from restarting too early after a shutdown. Get To Know Your Thermostat 3 69-1722
Simultaneously displays both room temperature and temperature setting. • Easy Change Battery Holder. • Built-in the dark. • Precise Comfort Control: ±1ºF of your set temperature. • Simplified Operation: Soft-key controls. Features • Large, Clear, Backlit Display: Easy-to-see and read-even in Compressor Protection: Minimum-off timer protects compressor from restarting too early after a shutdown. Get To Know Your Thermostat 3 69-1722
Owner's Manual
Page 4
Get To Know Your Thermostat Thermostat DIGITAL DISPLAY BATTERY HOLDER LATCH PRESS TO RELEASE BATTERY HOLDER. Inside SetCtinogol Fan Auto SysteCmoolOn Cool PRESS BATTERY HOLDER TWO AAA ALKALINE BATTERIES TEMPERATURE SETTING BUTTON RAISES TEMPERATURE SETTING FAN BUTTON SELECTS AUTO OR ON TEMPERATURE SETTING BUTTON LOWERS TEMPERATURE SETTING SYSTEM BUTTON SELECTS HEAT, OFF OR COOL M22010 69-1722 4
Get To Know Your Thermostat Thermostat DIGITAL DISPLAY BATTERY HOLDER LATCH PRESS TO RELEASE BATTERY HOLDER. Inside SetCtinogol Fan Auto SysteCmoolOn Cool PRESS BATTERY HOLDER TWO AAA ALKALINE BATTERIES TEMPERATURE SETTING BUTTON RAISES TEMPERATURE SETTING FAN BUTTON SELECTS AUTO OR ON TEMPERATURE SETTING BUTTON LOWERS TEMPERATURE SETTING SYSTEM BUTTON SELECTS HEAT, OFF OR COOL M22010 69-1722 4
Owner's Manual
Page 5
Get to Know Your Thermostat (Cont) Display INSIDE TEMPERATURE INDICATES BATTERIES ARE LOW AND MUST BE REPLACED Inside Replace Batt HeatCool Setting TEMPERATURE SETTING Fan On Auto Heat On Cool On System Heat Cool Off INDICATES THERMOSTAT IS "CALLING" FOR HEAT OR COOL CURRENT FAN SETTING CURRENT SYSTEM SETTING M22011 5 69-1722
Get to Know Your Thermostat (Cont) Display INSIDE TEMPERATURE INDICATES BATTERIES ARE LOW AND MUST BE REPLACED Inside Replace Batt HeatCool Setting TEMPERATURE SETTING Fan On Auto Heat On Cool On System Heat Cool Off INDICATES THERMOSTAT IS "CALLING" FOR HEAT OR COOL CURRENT FAN SETTING CURRENT SYSTEM SETTING M22011 5 69-1722
Owner's Manual
Page 6
CAUTION Equipment Damage Hazard. Service Needed Fan Auto Cool On Cool PRESS THE SYSTEM BUTTON TO SELECT HEAT, OFF OR COOL M22012 69-1722 6 Cool-Thermostat controls the cooling system. Air conditioning compressor damage possible. Off-Both the heating and cooling systems are off. Do not operate cooling system when outdoor temperature is below 50 °F (10 °C). Operate Your Thermostat Set System Setting Press the System button to select Heat, Off or Cool: Heat-Thermostat controls the heating system.
CAUTION Equipment Damage Hazard. Service Needed Fan Auto Cool On Cool PRESS THE SYSTEM BUTTON TO SELECT HEAT, OFF OR COOL M22012 69-1722 6 Cool-Thermostat controls the cooling system. Air conditioning compressor damage possible. Off-Both the heating and cooling systems are off. Do not operate cooling system when outdoor temperature is below 50 °F (10 °C). Operate Your Thermostat Set System Setting Press the System button to select Heat, Off or Cool: Heat-Thermostat controls the heating system.
Owner's Manual
Page 7
Use this setting for improved air circulation or for most homes.The fan runs only when the heating or cooling system is on. Service Needed Fan Auto Cool On Cool PRESS THE FAN BUTTON TO SELECT AUTO OR ON 7 M22013 69-1722 On-The fan runs continuously. Operate Your Thermostat (Cont) Set Fan Setting Press the Fan button to select Auto or On: Auto-Normal setting for more efficient air cleaning.
Use this setting for improved air circulation or for most homes.The fan runs only when the heating or cooling system is on. Service Needed Fan Auto Cool On Cool PRESS THE FAN BUTTON TO SELECT AUTO OR ON 7 M22013 69-1722 On-The fan runs continuously. Operate Your Thermostat (Cont) Set Fan Setting Press the Fan button to select Auto or On: Auto-Normal setting for more efficient air cleaning.
Owner's Manual
Page 8
... THIS BUTTON TO LOWER THE TEMPERATURE SETTING M22014 The first press of the Up or Down button changes the temperature setting. 69-1722 8 Operate Your Thermostat (Cont) Change Temperature Setting Press the Up or Down button to select the desired temperature setting.
... THIS BUTTON TO LOWER THE TEMPERATURE SETTING M22014 The first press of the Up or Down button changes the temperature setting. 69-1722 8 Operate Your Thermostat (Cont) Change Temperature Setting Press the Up or Down button to select the desired temperature setting.
Owner's Manual
Page 9
When the Replace Battery indicator is flashing, replace batteries promptly with two fresh AAA alkaline batteries. all settings are replaced; Replace Batteries 1. REPLACE BATTERY INDICATOR Replace Batt Service Needed Fan System Auto Cool M22015 The thermostat does not lose any settings when the batteries are permanently stored in memory. 9 69-1722
When the Replace Battery indicator is flashing, replace batteries promptly with two fresh AAA alkaline batteries. all settings are replaced; Replace Batteries 1. REPLACE BATTERY INDICATOR Replace Batt Service Needed Fan System Auto Cool M22015 The thermostat does not lose any settings when the batteries are permanently stored in memory. 9 69-1722
Owner's Manual
Page 10
Press the battery holder latch to release the battery holder. 3. BATTERY HOLDER LATCH BATTERY HOLDER Service Needed Fan Auto Cool M22016 69-1722 10 Remove the battery holder from the thermostat. Replace Batteries (Cont) 2.
Press the battery holder latch to release the battery holder. 3. BATTERY HOLDER LATCH BATTERY HOLDER Service Needed Fan Auto Cool M22016 69-1722 10 Remove the battery holder from the thermostat. Replace Batteries (Cont) 2.
Owner's Manual
Page 13
...flashes in the display. Replace the batteries as soon as long and can damage the thermostat. 4. NOTE: Replacing the batteries once a year also helps prevent battery leakage that can leak, causing thermostat damage. 3. Review Battery Tips 1. Non-alkaline batteries do not last as Replace ...months before the batteries run down completely. 2. Always use fresh AAA alkaline batteries. Although the thermostat has a Replace Battery indicator, replace the batteries once a year to prevent the thermostat and heating/cooling system from shutting down due to prevent your home for more than a ...
...flashes in the display. Replace the batteries as soon as long and can damage the thermostat. 4. NOTE: Replacing the batteries once a year also helps prevent battery leakage that can leak, causing thermostat damage. 3. Review Battery Tips 1. Non-alkaline batteries do not last as Replace ...months before the batteries run down completely. 2. Always use fresh AAA alkaline batteries. Although the thermostat has a Replace Battery indicator, replace the batteries once a year to prevent the thermostat and heating/cooling system from shutting down due to prevent your home for more than a ...
Owner's Manual
Page 14
The minimum-off timer is a call during the minimum-off timer, the thermostat flashes "Cool On" or "Heat On"a in the display and the compressor and fan turn on. ________ a Heat Pumps only. 69-1722 14 If there is activated after a shutdown. When the minimum-off timer expires, "Cool On" or "Heat On"a appears solidly in the display. Built-in Compressor Protection The RTH5100B Thermostat has built-in compressor protection (minimum-off timer) that prevents the compressor from restarting too early after the compressor turns off.
The minimum-off timer is a call during the minimum-off timer, the thermostat flashes "Cool On" or "Heat On"a in the display and the compressor and fan turn on. ________ a Heat Pumps only. 69-1722 14 If there is activated after a shutdown. When the minimum-off timer expires, "Cool On" or "Heat On"a appears solidly in the display. Built-in Compressor Protection The RTH5100B Thermostat has built-in compressor protection (minimum-off timer) that prevents the compressor from restarting too early after the compressor turns off.
Owner's Manual
Page 21
MODEL NUMBER xxxxxxxx DATE CODE xxxxxx THERMOSTAT BATTERY HOLDER M22178 Limited One Year Warranty... 21 69-1722 Customer Assistance For assistance with your Honeywell product please visit www.honeywell.com/yourhome or call Honeywell Customer Care toll free at 1-800-468-1502. Before calling, please have the thermostat model number and date code available.
MODEL NUMBER xxxxxxxx DATE CODE xxxxxx THERMOSTAT BATTERY HOLDER M22178 Limited One Year Warranty... 21 69-1722 Customer Assistance For assistance with your Honeywell product please visit www.honeywell.com/yourhome or call Honeywell Customer Care toll free at 1-800-468-1502. Before calling, please have the thermostat model number and date code available.