Owner's Manual
Page 2
Installation is preset for wiring assistance before returning the thermostat to the store. 69-2210EF-03 ii Call 1-800-468-1502 for the most common system We are here to match your heating/cooling system - It is Easy Label wires and remove your old thermostat Install and wire your new thermostat Set your new thermostat to help.
Installation is preset for wiring assistance before returning the thermostat to the store. 69-2210EF-03 ii Call 1-800-468-1502 for the most common system We are here to match your heating/cooling system - It is Easy Label wires and remove your old thermostat Install and wire your new thermostat Set your new thermostat to help.
Owner's Manual
Page 4
Old thermostat Cover 69-2210EF-03 2 M28099 If so, see back cover for proper disposal instructions. Leave wallplate in place Is there a sealed tube containing mercury? 2 Remove Old Thermostat Remove old thermostat but leave wallplate with wires attached.
Old thermostat Cover 69-2210EF-03 2 M28099 If so, see back cover for proper disposal instructions. Leave wallplate in place Is there a sealed tube containing mercury? 2 Remove Old Thermostat Remove old thermostat but leave wallplate with wires attached.
Owner's Manual
Page 5
3 Label Wires with Tags Label the wires using the supplied wire labels as you disconnect them. Wire Labels M28100 M28093 3 69-2210EF-03
3 Label Wires with Tags Label the wires using the supplied wire labels as you disconnect them. Wire Labels M28100 M28093 3 69-2210EF-03
Owner's Manual
Page 9
Have a Heat Pump system? We are here to help. Call 1-800-468-1502 for wiring assistance. 7 69-2210EF-03 M27513 Labels don't match? See page 14. 7 Connect Wires Simply match wire labels. Remove metal jumper if you have both R and Rc wires. See page 21.
Have a Heat Pump system? We are here to help. Call 1-800-468-1502 for wiring assistance. 7 69-2210EF-03 M27513 Labels don't match? See page 14. 7 Connect Wires Simply match wire labels. Remove metal jumper if you have both R and Rc wires. See page 21.
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 change settings. RTH6400 ASybsotuetmyosuertunpew thermostat Press and hold the s and FAN buttons until the screen changes (approximately 5 seconds). SETUP WIRING ASSISTANCE M28348 Press s or t to exit and save settings. M28349 Press NEXT to advance to next function. 13 69-2210EF-03 TROUBLESHOOTING
Function 1 Setting 0 Done Next Press DONE to change settings. RTH6400 ASybsotuetmyosuertunpew thermostat Press and hold the s and FAN buttons until the screen changes (approximately 5 seconds). SETUP WIRING ASSISTANCE M28348 Press s or t to exit and save settings. M28349 Press NEXT to advance to next function. 13 69-2210EF-03 TROUBLESHOOTING
Owner's Manual
Page 16
... 14 TROUBLESHOOTING 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...
... 14 TROUBLESHOOTING 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...
Owner's Manual
Page 17
ASSISTANCE TROUBLESHOOTING Press to the O/B W wire terminal (see page 21). 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. M28351 15 ... Function 2 does not appear, please turn to the next page to continue. 20 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...
ASSISTANCE TROUBLESHOOTING Press to the O/B W wire terminal (see page 21). 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. M28351 15 ... Function 2 does not appear, please turn to the next page to continue. 20 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...
Owner's Manual
Page 18
... 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). 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...
... 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). 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...
Owner's Manual
Page 19
...oil steam or gravity system: Use this setting if you have a standard gas or oil furnace that is selected, press NEXT to change setting. 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 have a steam or gravity heat system. Press to display next function.
...oil steam or gravity system: Use this setting if you have a standard gas or oil furnace that is selected, press NEXT to change setting. 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 have a steam or gravity heat system. Press to display next function.
Owner's Manual
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... option 0 if the outside temperature drops below 50ºF (10ºC). When correct setting is selected, press NEXT 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 room temperatures...
... option 0 if the outside temperature drops below 50ºF (10ºC). When correct setting is selected, press NEXT 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 room temperatures...
Owner's Manual
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SETUP WIRING RTH6400 Function 13: Smart Response® Technology Press the s or t button to change setting. M28351 ASSISTANCE TROUBLESHOOTING 19 69-2210EF-03 Press 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. When correct setting is selected, press NEXT to display next function.
SETUP WIRING RTH6400 Function 13: Smart Response® Technology Press the s or t button to change setting. M28351 ASSISTANCE TROUBLESHOOTING 19 69-2210EF-03 Press 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. When correct setting is selected, press NEXT to display next function.
Owner's Manual
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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
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RTH6400 Wiring If labels do not use C, X or B. SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected to both O and B if you have a heat pump. Wrap B wire with electrical tape. 21 69-2210EF-03 Do not use . 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). Do not connect both R and Rc terminals, remove metal jumper (see notes, below and connect to O/B W.
RTH6400 Wiring If labels do not use C, X or B. SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected to both O and B if you have a heat pump. Wrap B wire with electrical tape. 21 69-2210EF-03 Do not use . 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). Do not connect both R and Rc terminals, remove metal jumper (see notes, below and connect to O/B W.
Owner's Manual
Page 24
... heat is required • Check Function 3: Heating Fan Control to make sure it is set to match your thermostat, please try the following suggestions. SETUP WIRING Advanced Installation Guide Troubleshooting If you have difficulty with your heating equipment (see page 7). Temperature Make sure heating and cooling settings do not temperatures are...
... heat is required • Check Function 3: Heating Fan Control to make sure it is set to match your thermostat, please try the following suggestions. SETUP WIRING Advanced Installation Guide Troubleshooting If you have difficulty with your heating equipment (see page 7). Temperature Make sure heating and cooling settings do not temperatures are...
Owner's Manual
Page 25
... respond temperature. • Press SYSTEM button to set system to Heat. Wait 5 minutes for the system to make sure in system (see page 15). SETUP WIRING Troubleshooting RTH6400 Heating or • Press SYSTEM button to set system cooling system to Cool. "Cool On" or "Heat On" is flashing • Compressor protection feature...
... respond temperature. • Press SYSTEM button to set system to Heat. Wait 5 minutes for the system to make sure in system (see page 15). SETUP WIRING Troubleshooting RTH6400 Heating or • Press SYSTEM button to set system cooling system to Cool. "Cool On" or "Heat On" is flashing • Compressor protection feature...
Owner's Manual
Page 26
Check to make sure turn off) bare wires are not touching each other (see page 14). SETUP Advanced Installation Guide Troubleshooting Heating • Check Function 1: System Type to and cooling equipment running in ... system• Check Function 1: System Type to is running at the make sure it is set to match your heating and cooling equipment (see page 6). WIRING ASSISTANCE TROUBLESHOOTING 69-2210EF-03 24 same time (or • Grasp and pull thermostat away heat does not from wallplate.
Check to make sure turn off) bare wires are not touching each other (see page 14). SETUP Advanced Installation Guide Troubleshooting Heating • Check Function 1: System Type to and cooling equipment running in ... system• Check Function 1: System Type to is running at the make sure it is set to match your heating and cooling equipment (see page 6). WIRING ASSISTANCE TROUBLESHOOTING 69-2210EF-03 24 same time (or • Grasp and pull thermostat away heat does not from wallplate.
Owner's Manual
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... date code before calling. 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...
... date code before calling. 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...