Owner's Manual
Page 2
Call 1-800-468-1502 for the most common system We are here to help. Installation is preset for wiring assistance before returning the thermostat to the store. 69-2210EF-03 ii It is Easy Label wires and remove your old thermostat Install and wire your new thermostat Set your new thermostat to match your heating/cooling system -
Call 1-800-468-1502 for the most common system We are here to help. Installation is preset for wiring assistance before returning the thermostat to the store. 69-2210EF-03 ii It is Easy Label wires and remove your old thermostat Install and wire your new thermostat Set your new thermostat to match your heating/cooling system -
Owner's Manual
Page 9
7 Connect Wires Simply match wire labels. M27513 Labels don't match? We are here to help. Call 1-800-468-1502 for wiring assistance. 7 69-2210EF-03 Remove metal jumper if you have both R and Rc wires. See page 14. Have a Heat Pump system? See page 21.
7 Connect Wires Simply match wire labels. M27513 Labels don't match? We are here to help. Call 1-800-468-1502 for wiring assistance. 7 69-2210EF-03 Remove metal jumper if you have both R and Rc wires. See page 14. Have a Heat Pump system? See page 21.
Owner's Manual
Page 10
8 Install Batteries Install two AA alkaline batteries. Back of thermostat M28346 69-2210EF-03 8
8 Install Batteries Install two AA alkaline batteries. Back of thermostat M28346 69-2210EF-03 8
Owner's Manual
Page 13
... systems. It will NOT work on page 13 to match your thermostat to your system type is: q Heat Pump* without Backup Heat q Heat Only q Cool Only Continue with advanced installation on multi-stage heat pump systems or 120/240 Volt systems. 11 69-2210EF-03 If your system type. *Heat Pump-an air conditioner that provides cooling in the summer, and also runs in reverse in the winter...
... systems. It will NOT work on page 13 to match your thermostat to your system type is: q Heat Pump* without Backup Heat q Heat Only q Cool Only Continue with advanced installation on multi-stage heat pump systems or 120/240 Volt systems. 11 69-2210EF-03 If your system type. *Heat Pump-an air conditioner that provides cooling in the summer, and also runs in reverse in the winter...
Owner's Manual
Page 14
Advanced Installation System setup 13 Wiring 21 Troubleshooting 22 Customer assistance 25 Limited warranty 26
Advanced Installation System setup 13 Wiring 21 Troubleshooting 22 Customer assistance 25 Limited warranty 26
Owner's Manual
Page 15
Function 1 Setting 0 Done Next Press DONE to next function. 13 69-2210EF-03 TROUBLESHOOTING RTH6400 ASybsotuetmyosuertunpew thermostat Press and hold the s and FAN buttons until the screen changes (approximately 5 seconds). M28349 Press NEXT to advance to exit and save settings. SETUP WIRING ASSISTANCE M28348 Press s or t to change settings.
Function 1 Setting 0 Done Next Press DONE to next function. 13 69-2210EF-03 TROUBLESHOOTING RTH6400 ASybsotuetmyosuertunpew thermostat Press and hold the s and FAN buttons until the screen changes (approximately 5 seconds). M28349 Press NEXT to advance to exit and save settings. SETUP WIRING ASSISTANCE M28348 Press s or t to change settings.
Owner's Manual
Page 16
... NEXT to change setting. SETUP Advanced Installation Guide Function 1: System type Press the s or t button to select the type of system you have in your home: 10 WIRING ASSISTANCE Done Next M28350 0 Heating & cooling: Gas, oil or electric heating with central air conditioning. 1 Heat pump: Outside compressor provides both heating and cooling. 2 Heating only: Gas, oil or electric heating without central air conditioning. 3 Heating only with fan: Gas, oil or electric heating without central air conditioning. (Use this setting if you could turn the fan on...
... NEXT to change setting. SETUP Advanced Installation Guide Function 1: System type Press the s or t button to select the type of system you have in your home: 10 WIRING ASSISTANCE Done Next M28350 0 Heating & cooling: Gas, oil or electric heating with central air conditioning. 1 Heat pump: Outside compressor provides both heating and cooling. 2 Heating only: Gas, oil or electric heating without central air conditioning. 3 Heating only with fan: Gas, oil or electric heating without central air conditioning. (Use this setting if you could turn the fan on...
Owner's Manual
Page 17
... Done Next M28352 0 Cooling changeover valve: Use this setting if you connected a wire labeled "O" to the O/B W wire terminal (see page 21). 1 Heating changeover valve: Use this setting if you connected a wire labeled "B" to the O/B W wire terminal (see page 21). M28351 15 69-2210EF-03 ASSISTANCE TROUBLESHOOTING Press to change setting. SETUP WIRING RTH6400 Function 2: Heat pump changeover valve Press the s or t button to select whether your changeover valve is selected, press NEXT to display next function.
... Done Next M28352 0 Cooling changeover valve: Use this setting if you connected a wire labeled "O" to the O/B W wire terminal (see page 21). 1 Heating changeover valve: Use this setting if you connected a wire labeled "B" to the O/B W wire terminal (see page 21). M28351 15 69-2210EF-03 ASSISTANCE TROUBLESHOOTING Press to change setting. SETUP WIRING RTH6400 Function 2: Heat pump changeover valve Press the s or t button to select whether your changeover valve is selected, press NEXT to display next function.
Owner's Manual
Page 18
... correct setting is selected, press NEXT to change setting. ASSISTANCE TROUBLESHOOTING Press to display next function. SETUP WIRING Advanced Installation Guide Function 3: Heating fan control Press the s or t button to select your heating system and fan operation: NOTE: If Function 3 does not appear, please turn to the next page to continue. 30 Done Next M28353 0 Gas or oil heat: Use this setting if you have a gas or oil heating system (system controls fan operation). 1 Electric heat: Use this setting if you have an electric heating system (thermostat controls fan operation).
... correct setting is selected, press NEXT to change setting. ASSISTANCE TROUBLESHOOTING Press to display next function. SETUP WIRING Advanced Installation Guide Function 3: Heating fan control Press the s or t button to select your heating system and fan operation: NOTE: If Function 3 does not appear, please turn to the next page to continue. 30 Done Next M28353 0 Gas or oil heat: Use this setting if you have a gas or oil heating system (system controls fan operation). 1 Electric heat: Use this setting if you have an electric heating system (thermostat controls fan operation).
Owner's Manual
Page 19
... a standard gas or oil furnace that is selected, press NEXT to change setting. Press to display next function. M28351 17 69-2210EF-03 TROUBLESHOOTING SETUP RTH6400 Function 5: Heating cycle rate Press the s or t button to select your heating system and optimize its operation: NOTE: If Function 5 does not appear, please turn to the next page to continue. 55 WIRING ASSISTANCE Done Next M28354 5 Gas or oil furnace: Use this setting if you...
... a standard gas or oil furnace that is selected, press NEXT to change setting. Press to display next function. M28351 17 69-2210EF-03 TROUBLESHOOTING SETUP RTH6400 Function 5: Heating cycle rate Press the s or t button to select your heating system and optimize its operation: NOTE: If Function 5 does not appear, please turn to the next page to continue. 55 WIRING ASSISTANCE Done Next M28354 5 Gas or oil furnace: Use this setting if you...
Owner's Manual
Page 20
... NEXT to change setting. M28351 69-2210EF-03 18 TROUBLESHOOTING Press to display next function. SETUP Advanced Installation Guide Function 12: Manual/Auto Changeover Press the s or t button to option 0 if the outside temperature drops below 50ºF (10ºC). CAUTION: To avoid possible compressor damage, set to select Manual or Auto Changeover: 12 0 WIRING ASSISTANCE Done Next M28355 0 Manual Changeover: (Heat/Off/Cool) 1 Automatic Changeover: (Heat/Off/Cool/Auto) Automatically turns on heat or cool based on...
... NEXT to change setting. M28351 69-2210EF-03 18 TROUBLESHOOTING Press to display next function. SETUP Advanced Installation Guide Function 12: Manual/Auto Changeover Press the s or t button to option 0 if the outside temperature drops below 50ºF (10ºC). CAUTION: To avoid possible compressor damage, set to select Manual or Auto Changeover: 12 0 WIRING ASSISTANCE Done Next M28355 0 Manual Changeover: (Heat/Off/Cool) 1 Automatic Changeover: (Heat/Off/Cool/Auto) Automatically turns on heat or cool based on...
Owner's Manual
Page 21
Press to display next function. When correct setting is selected, press NEXT to change setting. M28351 ASSISTANCE TROUBLESHOOTING 19 69-2210EF-03 SETUP WIRING RTH6400 Function 13: Smart Response® Technology Press the s or t button to select Smart Response® Technology: 13 1 Done Next M28356 1 Smart Response® Technology ON 0 Smart Response® Technology OFF NOTE: See Operating Manual for information on Smart Response® Technology.
Press to display next function. When correct setting is selected, press NEXT to change setting. M28351 ASSISTANCE TROUBLESHOOTING 19 69-2210EF-03 SETUP WIRING RTH6400 Function 13: Smart Response® Technology Press the s or t button to select Smart Response® Technology: 13 1 Done Next M28356 1 Smart Response® Technology ON 0 Smart Response® Technology OFF NOTE: See Operating Manual for information on Smart Response® Technology.
Owner's Manual
Page 22
M28351 ASSISTANCE TROUBLESHOOTING 69-2210EF-03 20 SETUP WIRING Advanced Installation Guide AFubnocuttioynou1r4n: eTwemthpermatousrteadt isplay Press the s or t button to select Fahrenheit or Celsius temperature display: 14 0 Done Next 0 Fahrenheit temperature display (°F) 1 Celsius temperature display (°C) M28357 Press to exit and save changes. When correct setting is selected, press DONE to change setting.
M28351 ASSISTANCE TROUBLESHOOTING 69-2210EF-03 20 SETUP WIRING Advanced Installation Guide AFubnocuttioynou1r4n: eTwemthpermatousrteadt isplay Press the s or t button to select Fahrenheit or Celsius temperature display: 14 0 Done Next 0 Fahrenheit temperature display (°F) 1 Celsius temperature display (°C) M28357 Press to exit and save changes. When correct setting is selected, press DONE to change setting.
Owner's Manual
Page 23
SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected to both O and B if you have a heat pump. Do not connect both R and Rc terminals, remove metal jumper (see notes, below and connect to O/B W. Do not use . Wrap B wire with electrical tape. 21 69-2210EF-03 RTH6400 Wiring If labels do not use C, X or B. Wrap bare end of wire with electrical tape and do not match letters on the thermostat, check the chart below ). Connect O wire to terminal as shown here (see page 6).
SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected to both O and B if you have a heat pump. Do not connect both R and Rc terminals, remove metal jumper (see notes, below and connect to O/B W. Do not use . Wrap B wire with electrical tape. 21 69-2210EF-03 RTH6400 Wiring If labels do not use C, X or B. Wrap bare end of wire with electrical tape and do not match letters on the thermostat, check the chart below ). Connect O wire to terminal as shown here (see page 6).
Owner's Manual
Page 24
... 22 Temperature Make sure heating and cooling settings do not temperatures are correctly installed (see page 16). Fan does not turn on when heat is required • Check Function 3: Heating Fan Control to make sure it is blank • Make sure fresh AA alkaline batteries are set to system setting make sure it is set to acceptable change • Check Function 1: System Type to match your heating equipment (see page 7). SETUP WIRING Advanced Installation Guide Troubleshooting If...
... 22 Temperature Make sure heating and cooling settings do not temperatures are correctly installed (see page 16). Fan does not turn on when heat is required • Check Function 3: Heating Fan Control to make sure it is blank • Make sure fresh AA alkaline batteries are set to system setting make sure it is set to acceptable change • Check Function 1: System Type to match your heating equipment (see page 7). SETUP WIRING Advanced Installation Guide Troubleshooting If...
Owner's Manual
Page 25
... in heat mode, it is closed securely. • Wait 5 minutes for your or warm air in system (see page 15). Heat pump • Check Function 2: Heat Pump issues cool air Changeover Valve to the compressor. SETUP WIRING Troubleshooting RTH6400 Heating or • Press SYSTEM button to set system cooling system to respond. Make sure the temperature is set lower than the Inside respond temperature. • Press SYSTEM button to set system to Cool. Make sure the temperature does...
... in heat mode, it is closed securely. • Wait 5 minutes for your or warm air in system (see page 15). Heat pump • Check Function 2: Heat Pump issues cool air Changeover Valve to the compressor. SETUP WIRING Troubleshooting RTH6400 Heating or • Press SYSTEM button to set system cooling system to respond. Make sure the temperature is set lower than the Inside respond temperature. • Press SYSTEM button to set system to Cool. Make sure the temperature does...
Owner's Manual
Page 26
... 24 SETUP Advanced Installation Guide Troubleshooting Heating • Check Function 1: System Type to and cooling equipment running at the make sure it is running in make sure turn off) bare wires are not touching each other (see page 14). same time (or • Grasp and pull thermostat away heat does not from wallplate. Heating system• Check Function 1: System Type to is set to match your heating and cooling equipment...
... 24 SETUP Advanced Installation Guide Troubleshooting Heating • Check Function 1: System Type to and cooling equipment running at the make sure it is running in make sure turn off) bare wires are not touching each other (see page 14). same time (or • Grasp and pull thermostat away heat does not from wallplate. Heating system• Check Function 1: System Type to is set to match your heating and cooling equipment...
Owner's Manual
Page 27
...-1502. WIRING ASSISTANCE TROUBLESHOOTING 25 69-2210EF-03 Battery holder Part No. 50007072-001 Cover plate assembly Part No. 50002883-001 *Use to cover marks left by old thermostats. SETUP ACbuosutotmyoeur ransseiwsttahnecremostat RTH6400 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...
...-1502. WIRING ASSISTANCE TROUBLESHOOTING 25 69-2210EF-03 Battery holder Part No. 50007072-001 Cover plate assembly Part No. 50002883-001 *Use to cover marks left by old thermostats. SETUP ACbuosutotmyoeur ransseiwsttahnecremostat RTH6400 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...
Owner's Manual
Page 28
...WARRANTY. This warranty shall not apply if it ; This warranty gives you specific legal rights, and you purchased it is shown by Honeywell that the defect or malfunction was in the workmanship or materials, under normal use and service, for a period of one (1) year from state to you have other dated... defective or malfunctions, Honeywell shall repair or replace it , with a bill of sale or other rights which you may have any time during the warranty period the product is defective, (i) return it (at 1-800-468-1502. This warranty does not cover removal or reinstallation costs. ...
...WARRANTY. This warranty shall not apply if it ; This warranty gives you specific legal rights, and you purchased it is shown by Honeywell that the defect or malfunction was in the workmanship or materials, under normal use and service, for a period of one (1) year from state to you have other dated... defective or malfunctions, Honeywell shall repair or replace it , with a bill of sale or other rights which you may have any time during the warranty period the product is defective, (i) return it (at 1-800-468-1502. This warranty does not cover removal or reinstallation costs. ...
Owner's Manual
Page 30
... proper disposal. Contact your old thermostat in the trash if it contains mercury in U.S.A. CAUTION: To avoid possible compressor damage, do not run air conditioner if the outside temperature drops below 50°F (10°C). on recycled paper containing at least 10% post-consumer paper fibers. ® U.S. US Patent No. Automation and Control Solutions Honeywell International Inc. 1985 Douglas...
... proper disposal. Contact your old thermostat in the trash if it contains mercury in U.S.A. CAUTION: To avoid possible compressor damage, do not run air conditioner if the outside temperature drops below 50°F (10°C). on recycled paper containing at least 10% post-consumer paper fibers. ® U.S. US Patent No. Automation and Control Solutions Honeywell International Inc. 1985 Douglas...
