Honeywell RTH6400 Thermostat

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Owner's Manual


Page 1
Quick Installation Guide RTH6400 Series Programmable Thermostat 69-2210EF-03
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Owner's Manual


Page 2
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 heating/cooling system - Call 1-800-468-1502 for the most common system We are here to match your new thermostat to help.
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Owner's Manual


Page 4
Leave wallplate in place Is there a sealed tube containing mercury? Old thermostat Cover 69-2210EF-03 2 M28099 If so, see back cover for proper disposal instructions. 2 Remove Old Thermostat Remove old thermostat but leave wallplate with wires attached.
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Owner's Manual


Page 6
4 Separate Wallplate from new thermostat. Pull here to remove wallplate from New Thermostat Remove battery holder. Wallplate M28343 69-2210EF-03 4
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Owner's Manual


Page 7
M2834 Thermostat M28344 5 69-2210EF-03 5 Insert Quick Reference Card Insert quick reference card into slot in back of thermostat.
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Owner's Manual


Page 10
Back of thermostat M28346 69-2210EF-03 8 8 Install Batteries Install two AA alkaline batteries.
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Owner's Manual


Page 11
M28347 9 69-2210EF-03 9 Install Thermostat onto Wallplate Install thermostat onto the wallplate on the wall.
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Owner's Manual


Page 13
... on 24 volt or 750 mV systems. It will NOT work on page 13 to match your thermostat to your system type is : q Single Stage Heat and Cool Congratulations, you have other questions, call us toll-free at 1-800-468-1502. If your ...
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Owner's Manual


Page 15
SETUP WIRING ASSISTANCE M28348 Press s or t to exit and save 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 change settings. M28349 Press NEXT to advance to next function. 13 69-2210EF-03 TROUBLESHOOTING
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Owner's Manual


Page 16
... or electric heating without central air conditioning. (Use this setting if you could turn the fan on and off with a fan switch on your old thermostat.) Press to display next function. M28351 69-2210EF-03 14 TROUBLESHOOTING
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Owner's Manual


Page 18
... 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).
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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 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. Connect O wire 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). Do not use .
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Owner's Manual


Page 24
... Function 3: Heating Fan Control to make sure it is blank • Make sure fresh AA alkaline batteries are set to match your to match your thermostat, please try the following suggestions. Display is set to Cool heating and cooling equipment (see page 16). SETUP WIRING Advanced Installation Guide Troubleshooting If you...
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Owner's Manual


Page 26
same time (or • Grasp and pull thermostat away heat does not from wallplate. WIRING ASSISTANCE TROUBLESHOOTING 69-2210EF-03 24 SETUP Advanced Installation Guide Troubleshooting Heating • Check Function 1: System Type to ...
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Owner's Manual


Page 27
... 69-2210EF-03 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. Accessories/replacement parts To order, please 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. Battery holder Part No. 50007072-001 Cover plate assembly Part No. 50002883-001 *Use to cover marks left by old thermostats...
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Owner's Manual


Page 30
... US Patent No. Automation and Control Solutions Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Toronto, Ontario M1V 4Z9 http://DIYthermostats.honeywell.com Printed in a sealed tube. D542,677... and other patents pending. © 2008 Honeywell International Inc. 69-2210EF-03 M.S. MERCURY NOTICE: Do not place your local waste management authority for instructions regarding recycling and proper disposal. Contact your old thermostat...

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