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Honeywell RTH5100, Operating Instructions Manual, Page: 1 / 24

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OPERATING INSTRUCTIONS

® U.S. Registered Trademark

© 2004 Honeywell International Inc. 

All Rights Reserved • Patents Pending

69-1722

Operating Instructions

RTH5100B

Non-programmable Thermostat

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.

Read and Save these Instructions

Summary of Contents for RTH5100

Page 1: ...ons RTH5100B Non programmable Thermostat 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 Read and Save these Instructions ...

Page 2: ...y 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 ...

Page 3: ...rol 1ºF of your set temperature Simplified Operation Soft key controls Simultaneously displays both room temperature and temperature setting Easy Change Battery Holder Built in Compressor Protection Minimum off timer protects compressor from restarting too early after a shutdown Get To Know Your Thermostat ...

Page 4: ...ITAL DISPLAY FAN BUTTON SYSTEM BUTTON TEMPERATURE SETTING BUTTON TEMPERATURE SETTING BUTTON BATTERY HOLDER BATTERY HOLDER LATCH M22010 PRESS TO RELEASE BATTERY HOLDER RAISES TEMPERATURE SETTING TWO AAA ALKALINE BATTERIES LOWERS TEMPERATURE SETTING SELECTS HEAT OFF OR COOL SELECTS AUTO OR ON P R E S S ...

Page 5: ...t Heat Cool On On Setting Cool Heat Inside Fan On Auto Heat Cool Off System INSIDE TEMPERATURE TEMPERATURE SETTING INDICATES THERMOSTAT IS CALLING FOR HEAT OR COOL CURRENT SYSTEM SETTING M22011 CURRENT FAN SETTING INDICATES BATTERIES ARE LOW AND MUST BE REPLACED ...

Page 6: ...system Off Both the heating and cooling systems are off Cool Thermostat controls the cooling system CAUTION Equipment Damage Hazard Air conditioning compressor damage possible Do not operate cooling system when outdoor temperature is below 50 F 10 C CoolOn Service Needed Fan Auto Cool M22012 PRESS THE SYSTEM BUTTON TO SELECT HEAT OFF OR COOL ...

Page 7: ...r On Auto Normal setting for most homes The fan runs only when the heating or cooling system is on On The fan runs continuously Use this setting for improved air circulation or for more efficient air cleaning CoolOn Service Needed Fan Auto Cool M22013 PRESS THE FAN BUTTON TO SELECT AUTO OR ON ...

Page 8: ...Down button turns on the backlight The second press of the Up or Down button changes the temperature setting ReplaceBatt Service Needed Fan Auto Cool System PRESS THIS BUTTON TO RAISE THE TEMPERATURE SETTING TEMPERATURE SETTING M22014 TEMPERATURE SETTING RANGE HEAT 40 TO 90 F 4 5 T0 32 C COOL 50 TO 99 F 10 T0 37 C PRESS THIS BUTTON TO LOWER THE TEMPERATURE SETTING ...

Page 9: ...ashing replace batteries promptly with two fresh AAA alkaline batteries The thermostat does not lose any settings when the batteries are replaced all settings are permanently stored in memory ReplaceBatt Service Needed Fan Auto Cool System REPLACE BATTERY INDICATOR M22015 ...

Page 10: ... 10 Replace Batteries Cont 2 Press the battery holder latch to release the battery holder 3 Remove the battery holder from the thermostat Service Needed Fan Auto Cool BATTERY HOLDER LATCH BATTERY HOLDER M22016 ...

Page 11: ...1722 Replace Batteries Cont 4 Remove the old batteries and insert two fresh AAA alkaline batteries as marked on the battery holder M22017 BATTERY HOLDER PUSH BATTERIES OUT THROUGH THIS HOLE BATTERY DIRECTION ...

Page 12: ...69 1722 12 Replace Batteries Cont 5 Insert battery holder as shown Service Needed Fan Auto Cool BATTERY HOLDER LATCH BATTERY HOLDER M22016 ...

Page 13: ... causing thermostat damage 3 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 lack of battery power NOTE Replacing the batteries once a year also helps prevent battery leakage that can damage the thermostat 4 As a precaution replace the batteries when leaving your home for more t...

Page 14: ...starting too early after a shutdown The minimum off timer is activated after the compressor turns off If there is a call during the minimum off timer the thermostat flashes Cool On or Heat On a in the display When the minimum off timer expires Cool On or Heat On a appears solidly in the display and the compressor and fan turn on ________ a Heat Pumps only ...

Page 15: ... the wall Part Number 50001137 001 Small Cover Plate 50002883 001 Large Cover Plate To order call Honeywell Customer Care at 1 800 468 1502 2 Replacement Battery Holder Part Number 50000951 001 Battery Holder To order call Honeywell Customer Care at 1 800 468 1502 M22185 M22018 ...

Page 16: ...oes not turn on Set the system to Heat by pressing the System button Check the heat temperature setting to be sure it is set above the room temperature and Heat On shows solidly in the display Check the circuit breaker to be sure it is not tripped Check power switch at heating and or cooling system to be sure it is on Check the furnace door to be sure it is closed securely Wait five minutes for th...

Page 17: ...tch at the heating and or cooling system to be sure it is on Check the furnace door to be sure it is closed securely Wait five minutes for the cooling system to respond If all of this was checked contact your local heating and cooling contractor Cannot set System setting to Cool Check Installer Setup Number 1 Heating and or Cooling System Type make sure the setting matches the installed heating an...

Page 18: ...setting to Cool and set the temperature setting below the room temperature If Cool On is shown solidly in the display but the cooling system does not turn on see Cooling system does not turn on in the Troubleshooting Tips Heat On is flashing in the display heat pumps only Compressor minimum off timer is active Wait up to five minutes for the heating system to turn on Cool On is flashing in the dis...

Page 19: ...er Setup Number 2 Heat Pump Changeover Valve and make sure the setting matches the changeover required by the installed heat pump Refer to Installation Instructions 69 1716 Both the heating and cooling systems are running at the same time Check Installer Setup Number 1 Heating and or Cooling System Type and make sure the setting matches the installed heating and or cooling system Refer to Installa...

Page 20: ...fer to Installation Instructions 69 1716 Heating system does not turn off and the heat temperature setting is set below the room temperature Heat On is not shown in the display Check Installer Setup Number 1 Heating and or Cooling System Type and make sure the setting matches the installed heating and or cooling system Refer to Installation Instructions 69 1716 Troubleshooting Tips Cont If Then ...

Page 21: ...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 Limited One Year Warranty M22178 xxxxxxxx xxxxxx THERMOSTAT BATTERY HOLDER MODEL NUMBER DATE CODE ...

Page 22: ...of the malfunction and mail it postage prepaid to the following address Honeywell Return Goods Dock 4 MN10 3860 1885 Douglas Dr N Golden Valley MN 55422 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 Honeywe...

Page 23: ...me 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 Reta...

Page 24: ... www honeywell com yourhome Automation and Control Solutions Honeywell International Inc Honeywell Limited Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Scarborough Ontario M1V 4Z9 ...

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