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The TH5110D 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
toll free at 1-800-468-1502.
Read and Save these Instructions
Patents Pending
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved
Operating Instructions
Non-programmable Thermostat
or call Honeywell Customer Care
OPERATING INSTRUCTIONS
TH5110D
69-1713
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Summary of Contents for Honeywell 1-Heat/1-Cool - TH5110D1022 Large R
- Page 1 OPERATING INSTRUCTIONS The TH5110D 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.
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Page 2: Table Of Contents
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 Auto Changeover............15 Replacement Part ............19 Troubleshooting Tips ............20 Customer Assistance............23... -
Page 3: Features
Features • Large, Clear, Backlit Display: Easy-to-see and read—even in the dark. • Precise Comfort Control: ±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. -
Page 4: Get To Know Your Thermostat
Get to Know Your Thermostat Thermostat DIGITAL DISPLAY BATTERY HOLDER LATCH PRESS TO RELEASE BATTERY HOLDER BATTERY HOLDER TWO AAA ALKALINE BATTERIES TEMPERATURE SETTING BUTTON RAISES TEMPERATURE SETTING TEMPERATURE SETTING BUTTON LOWERS FAN BUTTON TEMPERATURE SELECTS AUTO OR ON SETTING SYSTEM BUTTON SELECTS HEAT, OFF, COOL OR AUTO M22084... -
Page 5: Display
Get to Know Your Thermostat (Cont) Display INSIDE INDICATES BATTERIES ARE TEMPERATURE LOW AND MUST BE REPLACED Replace Battery Inside Heat Cool Setting TEMPERATURE SETTING Heat INDICATES Cool THERMOSTAT IS "CALLING" FOR System HEAT OR COOL Heat Cool On Auto AutoOff CURRENT CURRENT... -
Page 6: Operate Your Thermostat
Operate Your Thermostat Set System Setting Press the System button to select Heat, Off, Cool or Auto: Heat—Thermostat controls the heating system. Off—Both the heating and cooling systems are off. Cool—Thermostat controls the cooling system. Auto—Thermostat automatically changes between heating and cooling operation, depending on indoor temperature. -
Page 7: Set Fan Setting
Operate Your Thermostat (Cont) Set Fan Setting Press the Fan button to select Auto or 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. -
Page 8: Change Temperature Setting
Operate Your Thermostat (Cont) Change Temperature Setting Press the Up or Down button to select the desired temperature setting. TEMPERATURE SETTING PRESS THIS BUTTON TO Replace Batt Inside RAISE THE TEMPERATURE SETTING PRESS THIS BUTTON TO Service Needed CoolOn System LOWER THE Auto Cool... -
Page 9: Replace Batteries
Replace Batteries AA alkaline batteries. 1. When the Replace Battery indicator is flashing, replace batteries promptly with two fresh AAA alkaline batteries. REPLACE BATTERY INDICATOR Replace Battery Inside Cool Setting Service Needed System Cool Auto M22110 The thermostat does not lose any settings when the batteries are replaced;... - Page 10 Replace Batteries (Cont) 2. Press the battery holder latch to release the battery holder. 3. Remove the battery holder from the thermostat. BATTERY HOLDER BATTERY HOLDER LATCH Replace Battery Inside Service Needed System Cool Auto M22111 69-1713...
- Page 11 Replace Batteries (Cont) 4. Remove the old batteries and insert two fresh AAA alkaline batteries as marked on the battery holder. BATTERY HOLDER PUSH BATTERIES THROUGH THIS HOLE BATTERY DIRECTION M22017 69-1713...
- Page 12 Replace Batteries (Cont) 5. Insert battery holder as shown. Battery Tips BATTERY HOLDER BATTERY HOLDER LATCH Replace Battery Inside Service Needed System Auto Cool M22111 69-1713...
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Page 13: Review Battery Tips
Review Battery Tips 1. Replace the batteries as soon as Replace Battery flashes in the display. The Replace Battery indicator flashes in the display two months before the batteries run down completely. 2. Always use fresh AAA alkaline batteries. Non- alkaline batteries do not last as long and can leak, causing damage to the thermostat. -
Page 14: Built-In Compressor Protection
Built-in Compressor Protection The TH5110D Thermostat has built-in compressor protection (minimum-off timer) that prevents the compressor from restarting 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”... -
Page 15: Auto Changeover
Auto Changeover Auto Changeover is a feature used in climates where both air conditioning and heating are used on the same day. The Auto setting appears only if the thermostat is set up for Auto Changeover by your heating and air conditioning dealer. - Page 16 Auto Changeover (Cont) 1. Press the System button to change the System setting to Auto. Replace Batt Service Needed CoolOn System Auto Cool PRESS THE SYSTEM BUTTON TO CHANGE SYSTEM SETTING TO AUTO. M22113 The Auto setting appears only if the thermostat is set up for Auto Changeover by your heating and air conditioning dealer.
- Page 17 Auto Changeover (Cont) 2. Press the Up or Down button to raise or lower the cool temperature setting. 3. Press the Select Heat/Cool button to display the Heat temperature setting. “Select Heat/Cool” flashes for six seconds. TEMPERATURE SETTING Replace Batt PRESS THIS BUTTON TO RAISE THE TEMPERATURE SETTING...
- Page 18 Auto Changeover (Cont) 4. Press the Up or Down button to raise or lower the heat temperature setting. 5. “Select Heat/Cool” stops flashing six seconds after the last button press. The thermostat then returns to displaying “Auto” for the System setting. TEMPERATURE SETTING PRESS THIS BUTTON...
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Page 19: Replacement Part
Replacement Part 1. Replacement Battery Holder— Part number 50000951-001 Battery Holder. To order, call your heating and air conditioning dealer or call Honeywell Customer Care at 1-800-468-1502. M22018 69-1713... -
Page 20: Troubleshooting Tips
Troubleshooting Tips If . . . Then . . . Display is • Check circuit breaker to be sure it is not blank. tripped. • Check power switch at heating and/or cooling system to be sure it is on. • Check furnace door to be sure it is closed securely. - Page 21 Troubleshooting Tips (Cont) If . . . Then . . . Cooling • Set the system to Cool by pressing the system does System button. not turn on. • Check the cool temperature setting to be sure it is set below room temperature and “Cool On”...
- Page 22 Troubleshooting Tips (Cont) If . . . Then . . . “Cool On” is Set System setting to Cool and set the not shown in temperature setting below the room the display. 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”...
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Page 23: Customer Assistance
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 DATE CODE THERMOSTAT BATTERY HOLDER M22047... -
Page 24: Limited Five-Year Warranty
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. - Page 25 Limited Five-Year Warranty (Cont) 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 FIVE-YEAR DURATION OF THIS WARRANTY.
- Page 26 69-1713...
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- Page 28 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 69-1713 G.H. 5-04 www.honeywell.com/yourhome...
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Questions and answers
Cool temp on thermostat will not set bellow 72 degrees
The Honeywell TH5110D1022 thermostat allows the cool temperature to be set as low as 50°F (10°C). If it won't allow setting below 72°F, it may be due to system settings, installer configuration limits, or a temporary issue. Check if the thermostat is in Cool mode and try adjusting the temperature again. If the issue persists, system configuration may need to be reviewed.
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