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Question posted by bubbles05 on January 7th, 2014

Steps To Change Ferenheit To Celcius

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Answer #1: Posted by waelsaidani1 on January 7th, 2014 6:48 PM

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Press the up arrow or down arrow button to select Fahrenheit or Celsius temperature display: press done after selection. More information on page 20 of the quick quide

Related Honeywell RTH6400 Manual Pages

Owner's Manual - Page 1

Quick Installation Guide RTH6400 Series Programmable Thermostat 69-2210EF-03

Owner's Manual - Page 2

Call 1-800-468-1502 for the most common system We are here 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 - Installation is preset for wiring assistance before returning the thermostat to help.

Owner's Manual - Page 4

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

Owner's Manual - Page 6

Wallplate M28343 69-2210EF-03 4 Pull here to remove wallplate from New Thermostat Remove battery holder. 4 Separate Wallplate from new thermostat.

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.

Owner's Manual - Page 10

8 Install Batteries Install two AA alkaline batteries. Back of thermostat M28346 69-2210EF-03 8

Owner's Manual - Page 11

M28347 9 69-2210EF-03 9 Install Thermostat onto Wallplate Install thermostat onto the wallplate on the wall.

Owner's Manual - Page 13

...-1502. If you are not sure of your system type or if you 're done! This thermostat works on 24 volt or 750 mV systems. It will NOT work on page 13 to match your thermostat to your system type. *Heat Pump-an air conditioner that provides cooling in the summer, and...

Owner's Manual - Page 15

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 next function. 13 69-2210EF-03 TROUBLESHOOTING 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

M28351 69-2210EF-03 14 TROUBLESHOOTING When correct setting is selected, press 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 ... 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.

Owner's Manual - Page 17

... you connected a wire labeled "B" to the O/B W wire terminal (see page 21). ASSISTANCE TROUBLESHOOTING Press to display next function. M28351 15 69-2210EF-03 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...

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). ASSISTANCE TROUBLESHOOTING Press to change setting. M28351 69-2210EF-03 16

Owner's Manual - Page 19

... a gas furnace of greater than 90% efficiency. 1 Gas/oil steam or gravity system: Use this setting if you have a steam or gravity heat system. 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...

Owner's Manual - Page 20

.../Auto) Automatically turns on heat or cool based on room temperatures. SETUP Advanced Installation Guide Function 12: Manual/Auto Changeover Press the s or t button to change setting. When correct setting is selected, press NEXT to option 0 if the outside temperature drops below 50ºF (10ºC). NOTE: System maintains a minimum 3º...

Owner's Manual - Page 21

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 ...

Owner's Manual - Page 22

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 ...

Owner's Manual - Page 23

RTH6400 Wiring If labels do not use C, X or B. Connect O wire to terminal as shown here (see page 6). Do not use . Wrap B wire with electrical tape. 21 ... terminals, remove metal jumper (see notes, below and connect to O/B W. Wrap bare end of wire with electrical tape and do not match letters on the thermostat, check the chart below ).

Owner's Manual - Page 24

... to make sure it is blank • Make sure fresh AA alkaline batteries are set to acceptable change • Check Function 1: System Type to system setting make sure it is set to match your thermostat, please try the following suggestions. Display is set to 37°C). Most problems can be corrected quickly...

Owner's Manual - Page 25

... Valve to make sure in system (see page 15). Make sure the temperature does not is set system cooling system to Heat. SETUP WIRING Troubleshooting RTH6400 Heating or • Press SYSTEM button to set higher than the Inside temperature. • Check circuit breaker and reset if necessary. • Make sure power...

Owner's Manual - Page 27

... assembly Part No. 50002883-001 *Use to cover marks left by old thermostats. WIRING ASSISTANCE TROUBLESHOOTING 25 69-2210EF-03 Accessories/replacement parts To order, please call Honeywell Customer Care toll-free at 1-800-468-1502. SETUP ACbuosutotmyoeur ransseiwsttahnecremostat RTH6400 For assistance with this product, please visit http://DIYthermostats.honeywell.com or...