Page 2 - Contents
69-1726—1 2 Contents Prepare for Installation ............................................................ 3 Follow Important Instructions .................................................. 5 Remove Old Thermostat ......................................................... 6 Follow Special Instruction...
Page 3 - Step 1. Prepare for Installation; Check that the following items are included:; WALLPLATE
3 69-1726—1 Step 1. Prepare for Installation 1. Check that the following items are included: If any of the items shown above are missing, call Honeywell Customer Care at 1-800-468-1502 before returning the thermostat to the store. CAUTION TURN OFF POWER to system at the furnace, or at the fuse/circu...
Page 5 - Step 2. Follow Important Instructions; These Installation Instructions explain later how to; RC; RED; DO NOT WIRE
5 69-1726—1 Step 2. Follow Important Instructions 1. Do not connect the wires to the new thermostat based on wire color because damage can occur to the heating and/or cooling system. These Installation Instructions explain later how to use the enclosed wire labels to correctly mark the wires connect...
Page 6 - Step 3. Remove Old Thermostat; Remove the cover from the old thermostat.; MERCURY NOTICE; OLD THERMOSTAT
69-1726—1 6 Step 3. Remove Old Thermostat 1. Turn off power at the heating and/or cooling system or fuse/circuit breaker panel. 2. Remove the cover from the old thermostat. 3. Remove the old thermostat from the wall or wall-plate. Do not remove the wires. MERCURY NOTICE If you are replacing a thermo...
Page 7 - Step 4. Follow Special Instructions; If you have; two; C and/or C1 wires connected to; WIRE HOLE
7 69-1726—1 Step 4. Follow Special Instructions 1. If you have two C and/or C1 wires connected to your old thermostat, do not connect them to your new thermostat. 2. Disconnect the C and/or C1 wires. Make sure they do not touch each other or any other wires. 3. Wrap the bare end of each C and/or C1 ...
Page 8 - If you have only; one; C and/or C1 wire connected to
69-1726—1 8 Step 4. Follow Special Instructions (Cont) 4. If you have only one C and/or C1 wire connected to your old thermostat, connect this wire to C on the new thermostat. Y C R W OLD THERMOSTAT WIRE HOLE M22223 CONNECT TO THE "C" ON THE NEW THERMOSTAT WIRE SCREW TERMINAL LETTERDESIGNATI...
Page 10 - Step 5. Label Old Thermostat Wires; When connecting the wires to the new
69-1726—1 10 Step 5. Label Old Thermostat Wires 1. As you disconnect each wire, use the enclosed wire labels to wrap a wire label around each wire that matches the letter designation. Do not allow the wires to fall into the wall opening after the wires are disconnected. 2. Remove any remaining part ...
Page 11 - Step 6. Mount New Wallplate to Wall
11 69-1726—1 Step 6. Mount New Wallplate to Wall 1. Separate the wallplate from the thermostat as shown. THERMOSTAT WIRE HOLE M22267 WALLPLATE
Page 14 - Position the wallplate over the wall anchors.
69-1726—1 14 Step 6. Mount New Wallplate to Wall (Cont) 4. Move the wallplate aside and drill holes at the locations marked on the wall. Drill 3/16 in. holes for drywall or 7/32 in. holes for plaster. 5. Tap the wall anchors into the drilled holes until even with the wall surface. 6. Position the wa...
Page 15 - Step 7. Connect Wires to New Wallplate; letter; HEAT PUMP; CONVENTIONAL; or; HEAT PUMP
15 69-1726—1 Step 7. Connect Wires to New Wallplate 1. Match the labeled wires to the letter designations on the wallplate. 2. Select the correct letter designations to follow for your system. If you have a standard heating and/or cooling system, use the CONVENTIONAL letter designations. If you have...
Page 16 - the metal jumper wire.; METAL JUMPER WIRE
69-1726—1 16 Step 7. Connect Wires to New Wallplate (Cont) 3. If wires are to be connected to both Rc and R, loosen the Rc and R screw terminals and remove the metal jumper wire. 4. If only one of the terminals, Rc or R, is to be connected, leave the metal jumper wire in place. M22295 METAL JUMPER W...
Page 18 - Compare letter designations on your old and new; information on page 20 if you are wiring a Heat
69-1726—1 18 Step 7. Connect Wires to New Wallplate (Cont) 7. Compare letter designations on your old and new thermostats. Use the information below if you are wiring a CONVENTIONAL System. Use the information on page 20 if you are wiring a Heat Pump system. Do not connect more than one wire to each...
Page 20 - wiring a
69-1726—1 20 Step 7. Connect Wires to New Wallplate (Cont) 8. Compare letter designations on your old and new thermostats. Use the information below if you are wiring a HEAT PUMP system. Be sure to read the note referenced in the numbered triangles above. These numbered notes appear on the next page...
Page 21 - Leave metal jumper wire between RC and R in place.; NOTES FOR HEAT PUMP SYSTEMS
21 69-1726—1 Step 7. Connect Wires to New Wallplate (Cont) 1 M22245 Leave metal jumper wire between RC and R in place. If the old thermostat had separate wires on both the V and VR, some system modification is required. Call your local heating and cooling contractor for assistance. If the old thermo...
Page 23 - Step 8. Install Batteries; BACK OF THERMOSTAT
23 69-1726—1 Step 8. Install Batteries 1. Install two fresh AA alkaline batteries on the back of the thermostat as marked on the thermostat. 2. Remove tab labeled “Remove during installation” in the lower right corner of the thermostat back. M22259 BACK OF THERMOSTAT BATTERY HOLDER BATTERIES (2) REM...
Page 24 - Step 9. Attach New Thermostat to Wallplate; wire back into the wall opening.
69-1726—1 24 Step 9. Attach New Thermostat to Wallplate 1. Align the screw blocks with the pins on the back of the thermostat. 2. Push the thermostat straight onto the wallplate until it snaps into place. 3. Turn on the power at the heating and/or cooling system or fuse/circuit breaker panel. If the...
Page 25 - Step 10. Set the Calendar
25 69-1726—1 Step 10. Set the Calendar This thermostat is designed to automatically keep current time and day in memory for up to ten years, under normal use, once the calendar is set. When the thermostat is first powered, the display is ready to set the calendar. 1. Use Up or Down arrow button to s...
Page 26 - DONE BUTTON; ADVANCES TO HOME SCREEN; UP AND DOWN BUTTONS; CHANGES TIME
69-1726—1 26 Step 10. Set the Calendar (Cont) 6. Press the Done button to advance to the Time. 7. Use the Up or Down arrow button to set the Time. 8. Press the Done button. DONE BUTTON ADVANCES TO HOME SCREEN UP AND DOWN BUTTONS CHANGES TIME M22303 PM Clock More Done
Page 27 - Step 11. Configure Installer Setup; Press and release the System button.
27 69-1726—1 Step 11. Configure Installer Setup 1. Use the Installer Setup Menu to match your new thermostat to your heating and/or cooling system. Follow the steps in this section to set up your thermostat. 2. Press and release the System button. System & Fan Schedule Clock & More Fan Auto ...
Page 29 - Date; Installer
29 69-1726—1 11. Configure Installer Setup (Cont) 5. Press the Up or Down arrows to select your setting for Installer Setup Number 0120 below. 6. After you select your setting, press the Next button to go to the next Installer Setup Number. 7. Follow steps 5 and 6 to set Installer Setup Numbers 0130...
Page 31 - Fan Control
31 69-1726—1 Step 11. Configure Installer Setup (Cont) 10. If you do not have a number 0180 on the left side of your display, go to the next page. 11. If you have a number 0180 on the left side of your display, press the Up or Down arrow to select your setting for Installer Setup Number 0180. 12. Af...
Page 35 - not adjust for Daylight Savings Time.
35 69-1726—1 Step 11. Configure Installer Setup (Cont) 21. Press the Up or Down arrow to select your setting for Installer Setup Number 0330. 22. After you select your setting, press the Next button to go to the next Installer Setup Number. M22312 0330 Daylight Savings 0 - Daylight Savings is Off --...
Page 38 - Congratulations! The installation of the thermostat
69-1726—1 38 Step 11. Configure Installer Setup (Cont) 27. Press the Up or Down arrow to select your setting for Installer Setup Number 0640. 28. After you select your setting, press the Done key to exit the Installer Setup and save your settings. 29. Congratulations! The installation of the thermos...
Page 39 - UP ARROW BUTTON
39 69-1726—1 Get to Know Your Thermostat Buttons Thermostat M22316 UP ARROW BUTTON RAISES TEMPERATURE SETTING OR MAKES SELECTIONS IN OTHER SCREENS DOWN BUTTON LOWERS TEMPERATURE SETTING OR MAKES SELECTIONS IN OTHER SCREENS CLOCK & MORE BUTTON SELECTS TIME AND FURNACE FILTER INFORMATION SYSTEM &a...
Page 41 - Heat
41 69-1726—1 Set System Setting Set System Setting Press the System button to select Heat, Off or Cool: Heat —Thermostat controls the heating system. Off —Heating and cooling systems are both off. Cool —Thermostat controls the cooling system. Em. Heat (Heat Pump Systems with Auxiliary Heat)—Thermost...
Page 42 - Set Fan Setting; Press the Fan button to select Auto or On:; —Normal setting for most homes.The fan; On; —The fan runs continuously. Use this setting
69-1726—1 42 Set System Setting (Cont) Set Fan Setting 1. Press System & Fan button. 2. Press the Fan button to select Auto or On: Auto —Normal setting for most homes.The fan runs only when the heating or cooling system is on. On —The fan runs continuously. Use this setting for improved air circ...
Page 44 - Program Your Heating and Cooling Schedule (Cont); Press the Edit button.
69-1726—1 44 Program Your Heating and Cooling Schedule (Cont) 2. Press the Edit button. Go Back Edit View M22331 MonTueWedThuFriSatSun
Page 46 - NEXT STEP BUTTON
69-1726—1 46 Program Your Heating and Cooling Schedule (Cont) 4. Press the Next Step button. Once pressed, Wake flashes to show it is selected. 5. Press the Next Step button to select the Wake time. 6. Use the Up and Down arrow buttons to change the time. 7. Press the Next Step button to select the ...
Page 47 - When complete, press the Done button. “Saved”; To select Saturday and/or Sunday to schedule, use
47 69-1726—1 Program Your Heating and Cooling Schedule (Cont) 12. When complete, press the Done button. “Saved” appears on the display to indicate changes are being saved to the day(s) selected. 13. To set a program schedule for Saturday and Sunday, repeat steps 1 through 12. To select Saturday and/...
Page 48 - Use the Up and Down arrow buttons to set the
69-1726—1 48 Set Time Set Time 1. Press Clock & More button. 2. Use the Up and Down arrow buttons to set the current time. 3. Press the Done button. The current day of the week should already be set correctly. If not, see Step 11, Configure Installer Setup. M22335 Done PM Go Back Tue
Page 49 - Set Temperature Overrides; appears on the display above the set temperature.
49 69-1726—1 Set Temperature Overrides Hold Temperature Until (Temporary Hold) Hold temperature temporarily until the next scheduled period time. 1. Press the Up or Down arrow buttons next to the temperature you want to adjust. “Temporary” appears on the display above the set temperature. 2. Press t...
Page 50 - Permanent Hold; Press the Hold button. “Permanent Hold” shows on
69-1726—1 50 Set Temperature Overrides (Cont) Permanent Hold Permanent Hold changes the temperature setting until Permanent Hold is cancelled. 1. Use the Up or Down arrow buttons to set the temperature you want during the hold. 2. Press the Hold button. “Permanent Hold” shows on the display. 3. Pres...
Page 51 - Press the Reset button to restart the filter timer.
51 69-1726—1 Use Your Filter Timer The Filter Timer notifies you when to change your furnace filter. Reset Filter Timer 1. “Change Filter” appears on the display when the filter timer expires. 2. Press the Reset button to restart the filter timer. See Step 11 to turn the Filter Timer Change Reminder...
Page 52 - View or Reset The Remaining Change Filter Time; Press the Next button.
69-1726—1 52 Use Your Filter Timer (Cont) View or Reset The Remaining Change Filter Time 1. Press the Clock & More button. 2. Press the Next button. 3. Press the Reset button to Restart the filter timer, if desired. 4. Press the Done button. See Step 11 to turn the Filter Timer Change Reminder f...
Page 53 - Understand Temperature Recovery Feature; It takes about a week for the thermostat to adjust to
53 69-1726—1 Understand Temperature Recovery Feature Your thermostat comes with a feature called Adaptive Intelligent Recovery™, which eliminates all guesswork when setting your schedule. How long does it take the furnace to warm your house in the morning before you get out of bed or how long does i...
Page 54 - Replace Batteries; When the LO Battery indicator is flashing, replace
69-1726—1 54 Replace Batteries 1. When the LO Battery indicator is flashing, replace the batteries promptly with two fresh AA alkaline batteries. 2. Remove thermostat from the wallplate by pulling straight out. M22322 M22323
Page 56 - Align the screw blocks with the pins on the back of
69-1726—1 56 Replace Batteries (Cont) 4. Align the screw blocks with the pins on the back of the thermostat. 5. Push the thermostat straight onto the wallplate until it snaps into place. WALLPLATE M22299 TERMINAL SCREW BLOCK PINS ON BACK OF THERMOSTAT
Page 57 - Review Battery Tips; Although the thermostat has a Low Battery indica-
57 69-1726—1 Review Battery Tips 1. Replace the batteries as soon as LO Batt flashes in the display. The LO Battery indicator flashes in the display one month before the batteries run down completely. 2. Always use fresh AA alkaline batteries. Non-alka-line batteries do not last as long and can leak...
Page 58 - Built-in Compressor Protection; compressor from restarting too early after a shutdown.
69-1726—1 58 Built-in Compressor Protection The RTH7400D Thermostat has built-in compressor protection (minimum-off timer) that prevents the compressor from restarting too early after a shutdown. The minimum-off timer is activated after the compressor turns off. If there is a call during the minimum...
Page 59 - Troubleshooting Tips
59 69-1726—1 Troubleshooting Tips If . . . Then . . . Display is blank. Check that fresh AA alkaline batteries are installed as marked on the thermostat. Temperature settings do not change. Check that the temperature settings are: • Heating 40°F to 90°F(4.5°C to 32°C). • Cooling 50°F to 99°F (10°C t...
Page 62 - Customer Assistance
69-1726—1 62 Customer Assistance For assistance with your Honeywell product, please visit www.honeywell.com/yourhome or call Honeywell Customer Care toll free at 1-800-468-1502.
Page 63 - Limited One-Year Warranty; retailer from which you purchased it, or
63 69-1726—1 Limited One-Year Warranty Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the pr...
Page 64 - Automation and Control Solutions; If you have any questions concerning this warranty, please write
69-1726—1 G.H. 08-04 www.honeywell.com/yourhome Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, OntarioM1V 4Z9 Limited One-Year Warranty (Cont) THIS WARRANTY IS THE ONLY E...
