Owner's Manual
Page 2
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 - 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
Owner's Manual
Page 4
If so, see back cover for proper disposal instructions. 2 Remove Old Thermostat Remove old thermostat but leave wallplate with wires attached. Old thermostat Cover 69-2210EF-03 2 M28099 Leave wallplate in place Is there a sealed tube containing mercury?
If so, see back cover for proper disposal instructions. 2 Remove Old Thermostat Remove old thermostat but leave wallplate with wires attached. Old thermostat Cover 69-2210EF-03 2 M28099 Leave wallplate in place Is there a sealed tube containing mercury?
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
Remove metal jumper if you have both R and Rc wires. See page 21. See page 14. 7 Connect Wires Simply match wire labels. Have a Heat Pump system? M27513 Labels don't match? Call 1-800-468-1502 for wiring assistance. 7 69-2210EF-03 We are here to help.
Remove metal jumper if you have both R and Rc wires. See page 21. See page 14. 7 Connect Wires Simply match wire labels. Have a Heat Pump system? M27513 Labels don't match? Call 1-800-468-1502 for wiring assistance. 7 69-2210EF-03 We are here to help.
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
SETUP WIRING ASSISTANCE M28348 Press s or t to exit and save settings. 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). M28349 Press NEXT to advance to next function. 13 69-2210EF-03 TROUBLESHOOTING
SETUP WIRING ASSISTANCE M28348 Press s or t to exit and save settings. 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). 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
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.... 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 a wire labeled "B" 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...
.... 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 a wire labeled "B" 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...
Owner's Manual
Page 18
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, ...
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
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... 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.
... 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.
Owner's Manual
Page 20
...;F difference between heat and cool settings. M28351 69-2210EF-03 18 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 room temperatures...
...;F difference between heat and cool settings. M28351 69-2210EF-03 18 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 room temperatures...
Owner's Manual
Page 21
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. M28351 ASSISTANCE TROUBLESHOOTING 19 69-2210EF-03 SETUP WIRING RTH6400 Function 13: Smart Response® Technology Press the s or t button to change setting. When correct setting is selected, press NEXT to display next function.
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. M28351 ASSISTANCE TROUBLESHOOTING 19 69-2210EF-03 SETUP WIRING RTH6400 Function 13: Smart Response® Technology Press the s or t button to change setting. When correct setting is selected, press NEXT to display next function.
Owner's Manual
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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. M28351 ASSISTANCE TROUBLESHOOTING 69-2210EF-03 20 When correct setting is selected, press DONE to change setting.
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. M28351 ASSISTANCE TROUBLESHOOTING 69-2210EF-03 20 When correct setting is selected, press DONE to change setting.
Owner's Manual
Page 23
Wrap B wire with electrical tape. 21 69-2210EF-03 SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected to O/B W. Do not use . Connect O wire to both O and B if you have a heat pump. Wrap bare end of wire with electrical tape and do not match letters on the thermostat, check the chart below and connect to terminal as shown here (see page 6). RTH6400 Wiring If labels do not use C, X or B. Do not connect both R and Rc terminals, remove metal jumper (see notes, below).
Wrap B wire with electrical tape. 21 69-2210EF-03 SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected to O/B W. Do not use . Connect O wire to both O and B if you have a heat pump. Wrap bare end of wire with electrical tape and do not match letters on the thermostat, check the chart below and connect to terminal as shown here (see page 6). RTH6400 Wiring If labels do not use C, X or B. Do not connect both R and Rc terminals, remove metal jumper (see notes, below).
Owner's Manual
Page 24
SETUP WIRING Advanced Installation Guide Troubleshooting If you have difficulty with your heating equipment (see page 7). ASSISTANCE TROUBLESHOOTING 69-2210EF-03 22 Fan does not turn on ...
SETUP WIRING Advanced Installation Guide Troubleshooting If you have difficulty with your heating equipment (see page 7). ASSISTANCE TROUBLESHOOTING 69-2210EF-03 22 Fan does not turn on ...
Owner's Manual
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... mode, it is set system cooling system to Heat. cool mode ASSISTANCE TROUBLESHOOTING 23 69-2210EF-03 Wait 5 minutes for the system to respond. SETUP WIRING Troubleshooting RTH6400 Heating or • Press SYSTEM button to set lower than the Inside respond temperature. • Press SYSTEM button to set system to Cool...
... mode, it is set system cooling system to Heat. cool mode ASSISTANCE TROUBLESHOOTING 23 69-2210EF-03 Wait 5 minutes for the system to respond. SETUP WIRING Troubleshooting RTH6400 Heating or • Press SYSTEM button to set lower than the Inside respond temperature. • Press SYSTEM button to set system to Cool...
Owner's Manual
Page 26
...-2210EF-03 24 SETUP Advanced Installation Guide Troubleshooting Heating • Check Function 1: System Type to and cooling equipment running in make sure turn off) bare wires are not touching each other (see page 6). Heating system• Check Function 1: System Type to is running at the make sure it is set to...
...-2210EF-03 24 SETUP Advanced Installation Guide Troubleshooting Heating • Check Function 1: System Type to and cooling equipment running in make sure turn off) bare wires are not touching each other (see page 6). Heating system• Check Function 1: System Type to is running at the make sure it is set to...
Owner's Manual
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.... 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. WIRING ASSISTANCE TROUBLESHOOTING 25 69-2210EF-03 Accessories/replacement parts To order, please call Honeywell Customer Care toll-free at 1-800-468-1502. Battery holder Part No. 50007072...
.... 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. WIRING ASSISTANCE TROUBLESHOOTING 25 69-2210EF-03 Accessories/replacement parts To order, please call Honeywell Customer Care toll-free at 1-800-468-1502. Battery holder Part No. 50007072...