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 next function. 13 69-2210EF-03 TROUBLESHOOTING M28349 Press NEXT to advance to change settings. RTH6400 ASybsotuetmyosuertunpew thermostat Press and hold the s and FAN buttons until the screen changes (approximately 5 seconds). Function 1 Setting 0 Done Next Press DONE to exit and save settings.
SETUP WIRING ASSISTANCE M28348 Press s or t to next function. 13 69-2210EF-03 TROUBLESHOOTING M28349 Press NEXT to advance to change settings. RTH6400 ASybsotuetmyosuertunpew thermostat Press and hold the s and FAN buttons until the screen changes (approximately 5 seconds). Function 1 Setting 0 Done Next Press DONE to exit and save settings.
Owner's Manual
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M28351 69-2210EF-03 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 ...
M28351 69-2210EF-03 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 ...
Owner's Manual
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... (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). 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...
... (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). 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...
Owner's Manual
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ASSISTANCE TROUBLESHOOTING Press to display next function. When correct setting is selected, press NEXT to change setting. M28351 69-2210EF-03 16 SETUP WIRING Advanced Installation Guide ...
ASSISTANCE TROUBLESHOOTING Press to display next function. When correct setting is selected, press NEXT to change setting. M28351 69-2210EF-03 16 SETUP WIRING Advanced Installation Guide ...
Owner's Manual
Page 19
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 ... than 90% efficiency. 1 Gas/oil steam or gravity system: Use this setting if you have a steam or gravity heat system. M28351 17 69-2210EF-03 TROUBLESHOOTING Press 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 ... than 90% efficiency. 1 Gas/oil steam or gravity system: Use this setting if you have a steam or gravity heat system. M28351 17 69-2210EF-03 TROUBLESHOOTING Press to change setting.
Owner's Manual
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... Changeover: (Heat/Off/Cool/Auto) Automatically turns on heat or cool based on room temperatures. CAUTION: To avoid possible compressor damage, set to change setting. TROUBLESHOOTING Press to option 0 if the outside temperature drops below 50ºF (10ºC).
... Changeover: (Heat/Off/Cool/Auto) Automatically turns on heat or cool based on room temperatures. CAUTION: To avoid possible compressor damage, set to change setting. TROUBLESHOOTING Press to option 0 if the outside temperature drops below 50ºF (10ºC).
Owner's Manual
Page 21
M28351 ASSISTANCE TROUBLESHOOTING 19 69-2210EF-03 Press to display next function. When correct setting is selected, press NEXT to change setting. 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.
M28351 ASSISTANCE TROUBLESHOOTING 19 69-2210EF-03 Press to display next function. When correct setting is selected, press NEXT to change setting. 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
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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. 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.
Owner's Manual
Page 23
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). RTH6400 Wiring If labels do not use C, X or B. Do not use . Do not connect both R and Rc terminals, remove metal jumper (see notes, below and connect to O/B W. Wrap B wire with electrical tape. 21 69-2210EF-03 SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected 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 ). Connect O wire to terminal as shown here (see page 6). RTH6400 Wiring If labels do not use C, X or B. Do not use . Do not connect both R and Rc terminals, remove metal jumper (see notes, below and connect to O/B W. Wrap B wire with electrical tape. 21 69-2210EF-03 SETUP WIRING ASSISTANCE TROUBLESHOOTING M28418 If wires will be connected to both O and B if you have a heat pump.
Owner's Manual
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ASSISTANCE TROUBLESHOOTING 69-2210EF-03 22 Fan does not turn on when heat is required • Check Function 3: Heating Fan Control to make sure it is blank ... to match your heating equipment (see page 14). Display is set to match your thermostat, please try the following suggestions. SETUP WIRING Advanced Installation Guide Troubleshooting If you have difficulty with your to Cool heating and cooling equipment (see page 16). Cannot change ranges: • Heat: 40° to 90°...
ASSISTANCE TROUBLESHOOTING 69-2210EF-03 22 Fan does not turn on when heat is required • Check Function 3: Heating Fan Control to make sure it is blank ... to match your heating equipment (see page 14). Display is set to match your thermostat, please try the following suggestions. SETUP WIRING Advanced Installation Guide Troubleshooting If you have difficulty with your to Cool heating and cooling equipment (see page 16). Cannot change ranges: • Heat: 40° to 90°...
Owner's Manual
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..., without damage to Cool. Heat pump • Check Function 2: Heat Pump issues cool air Changeover Valve to respond. cool mode ASSISTANCE TROUBLESHOOTING 23 69-2210EF-03 Make sure the temperature is engaged. "Cool On" or "Heat On" is flashing • Compressor protection feature ...is set system cooling system to Heat. SETUP WIRING Troubleshooting RTH6400 Heating or • Press SYSTEM button to set lower than the Inside respond temperature. • Press SYSTEM button to set system to the...
..., without damage to Cool. Heat pump • Check Function 2: Heat Pump issues cool air Changeover Valve to respond. cool mode ASSISTANCE TROUBLESHOOTING 23 69-2210EF-03 Make sure the temperature is engaged. "Cool On" or "Heat On" is flashing • Compressor protection feature ...is set system cooling system to Heat. SETUP WIRING Troubleshooting RTH6400 Heating or • Press SYSTEM button to set lower than the Inside respond temperature. • Press SYSTEM button to set system to the...
Owner's Manual
Page 26
... Type to is running at the make sure it is set to match your heating and cooling equipment (see page 14). SETUP Advanced Installation Guide Troubleshooting Heating • Check Function 1: System Type to and cooling equipment running in make sure it is set to match your cool mode heating and cooling...
... Type to is running at the make sure it is set to match your heating and cooling equipment (see page 14). SETUP Advanced Installation Guide Troubleshooting Heating • Check Function 1: System Type to and cooling equipment running in make sure it is set to match your cool mode heating and cooling...
Owner's Manual
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... Care toll-free at 1-800-468-1502. 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 To save time, please remove the battery holder and note your model number and...
... Care toll-free at 1-800-468-1502. 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 To save time, please remove the battery holder and note your model number and...