background image

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 wires interfere with mounting the 
thermostat to the wallplate, push the excess 

wire back into the wall opening.

WALLPLATE

M22299

TERMINAL SCREW BLOCK

PINS ON

BACK OF

THERMOSTAT

Summary of Contents for RTH7400D

Page 1: ...H7400D Programmable Thermostat The RTH7400D Thermostat provides electronic control of 24 Vac heating and cooling systems or 750 mV heating systems For assistance with your Honeywell product please visit www honeywell com yourhome or call Honeywell Customer Care toll free at 1 800 468 1502 Read and Save these Instructions ...

Page 2: ...ove Old Thermostat 6 Follow Special Instructions 7 Label Old Thermostat Wires 10 Mount New Wallplate to Wall 11 Connect Wires to New Wallplate 15 Install Batteries 23 Attach New Thermostat to Wallplate 24 Configure Installer Setup 26 Customer Assistance 62 Limited One Year Warranty 63 ...

Page 3: ...e furnace or at the fuse circuit breaker panel before you begin Match the letter of your old thermostat wire with the terminal of the corresponding letter on your new thermostat or base ÓN ell com yourhome B G R V VR X B G R V VR H Y2 H RC W C L RH W1 X2 E O T W2 F P U W3 Y1 F P U W3 Y1 WALLPLATE THERMOSTAT M22278 MOUNTING SCREWS 2 AND WALL ANCHORS 2 OWNER S GUIDE CAUTION CARD WIRE LABELS Mon Read...

Page 4: ...Check that you have everything required for the installation Two AA alkaline batteries No 2 Phillips screwdriver and standard pocket screwdriver Drill Drill bit use 3 16 in for drywall use 7 32 in for plaster Level optional Hammer Pencil Electrical tape ...

Page 5: ...or 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 connected to your old thermostat M22034 Y G RC W OLD THERMOSTAT RED WHITE YELLOW ORANGE GREEN DO NOT WIRE NEW THERMOSTAT BASED ON WIRE COLOR R ...

Page 6: ...ll plate Do not remove the wires MERCURY NOTICE If you are replacing a thermostat that contains mercury in a sealed tube do not place your old thermostat in the trash Contact your local waste management authority for instructions regarding recycling and the proper disposal of an old thermostat containing mercury in a sealed tube Y G C R W OLD THERMOSTAT 18 2 25 3 9 7 5 4 L O NGER THERMOSTAT COVER ...

Page 7: ...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 wire with electrical tape Y C C R W OLD THERMOSTAT WIRE HOLE M22201 DO NOT CONNECT TO NEW THERMOSTAT WIRE SCREW TERMINAL LETTER DESIGNATION G ...

Page 8: ...ns 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 LETTER DESIGNATION G ...

Page 9: ...connected to your old thermostat do not connect them to your new thermostat 6 Wrap the end of the wires that are not connected with electrical tape Y G RC R OLD THERMOSTAT WIRE HOLE WIRES NOT CONNECTED DO NOT CONNECT TO NEW THERMOSTAT M22040 WIRE SCREW TERMINAL LETTER DESIGNATION W ...

Page 10: ...ow the wires to fall into the wall opening after the wires are disconnected 2 Remove any remaining part of the old thermostat from the wall When connecting the wires to the new thermostat refer to the wire labels Do not connect wires to your new thermostat based on the color of the wire Y G RC R OLD THERMOSTAT WIRE HOLE M22039 WIRE SCREW TERMINAL LETTER DESIGNATION WIRE LABEL W W G Y R R C ...

Page 11: ...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 12: ...69 1726 1 12 Step 6 Mount New Wallplate to Wall Cont 2 Pass the labeled wires through the wire hole on the wallplate M22279 WIRE HOLE WALL OPENING WALLPLATE LABELED WIRES ...

Page 13: ...te to Wall Cont 3 Position the wallplate on the wall with the arrow pointing up Level the wallplate for appearance only and mark the two mounting holes with a pencil M22292 WALLPLATE LEVEL PLACE LEVEL ON SUPPORT TABS MARK MOUNTING HOLES 2 ...

Page 14: ...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 wallplate over the wall anchors 7 Insert the mounting screws into the wall anchors Check leveling if desired and tighten the mounting screws M22293 DRILLED HOLES 2 WALL ANCHORS 2 MOUNTING SCREWS 2 WALLPLATE ...

Page 15: ...rrect 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 a heat pump system use the HEAT PUMP letter designations to wire the new thermostat See table on page 30 to help you determine if you have a CONVENTIONAL or HEAT PUMP system M22294 ...

Page 16: ...ted 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 WIRE SCREW TERMINALS TERMINAL BLOCK LETTER DESIGNATIONS R RC Y G C O B WALLPLATE ...

Page 17: ...e of the terminal block that match the letter designations Tighten the screw terminals 6 If any of the labeled wires do not match the letter designations see next page for wire connections M22325 LABELED WIRES SCREW TERMINALS TERMINAL BLOCK CONVENTIONAL LETTER DESIGNATIONS R RC Y G C W INSERT WIRE IN HOLE WIRE HOLE Y G WALLPLATE RC R W ...

Page 18: ... 20 if you are wiring a Heat Pump system Do not connect more than one wire to each terminal Be sure to read the notes referenced in the numbered triangles above These numbered notes appear on the next page C G W R RC or R CONVENTIONAL letter designations on the new thermostat Possible letter designations on the labeled wires M22208 RC or RH 4 V R or W1 H W or C1 X B C W2 1 2 2 3 1 Y W2 Y2 or Y1 M ...

Page 19: ...inals on the old thermostat remove metal jumper wire between RC and R on the new thermostat Connect the old R to the new RC and the old RH to the new R If two C and or C1 wires were connected to the old thermostat do not connect them to the new thermostat Wrap the bare end of each wire separately with electrical tape and do not use If one C and or C1 wire was connected to the old thermostat the wi...

Page 20: ...ing a HEAT PUMP system Be sure to read the note referenced in the numbered triangles above These numbered notes appear on the next page L C Y R RC VR or V or M22210 2 3 3 1 G AUX E R O Y G C L E W2 O B 4 H or B Y1 or M or F or X or B F or X2 or X AUX W1 W or HEAT PUMP letter designations on the new thermostat Possible letter designations on the labeled wires ...

Page 21: ...r local heating and cooling contractor for assistance If the old thermostat had wires on both O and B be sure to attach the B wire to the C letter designation on the new thermostat If another wire is already matched to the C contact Honeywell If the old thermostat had wires on W1 Y1 and W2 some system modification is required Call your local heating and cooling contractor for assistance 2 3 NOTES ...

Page 22: ...69 1726 1 22 Step 7 Connect Wires to New Wallplate Cont 9 Push excess wire back into the wall opening Keep wires in the shaded area WALLPLATE M22297 WALL OPENING WIRE SHADED AREA ...

Page 23: ... 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 REMOVE DURING INSTALLATION M22298 REMOVE TAB REMOVE DURING INSTALLATION ...

Page 24: ...e 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 wires interfere with mounting the thermostat to the wallplate push the excess wire back into the wall opening WALLPLATE M22299 TERMINAL SCREW BLOCK PINS ON BACK OF THERMOSTAT ...

Page 25: ...s the Next button to advance to the Date 3 Use the Up or Down arrow button to set the Date 4 Press the Next button to advance to the Year 5 Use the Up or Down arrow button to set the Year The calendar can be set anytime See Step 11 Configure Installer Setup for instructions M22302 MONTH YEAR DAY GO BACK BUTTON GOES BACK TO LAST SETTING NEXT BUTTON ADVANCE TO NEXT SETTING DONE BUTTON ADVANCES TO TI...

Page 26: ... 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: ...ller 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 Tue System Auto Heat Off Cool Set To M22304 ...

Page 28: ...ter button for approximately five seconds until the screen changes 4 Release the center button when the display on your thermostat matches the display below System Fan FanUseEdit CancelDone Fan Auto System Auto Em Heat Off Cool M22305 ResetGo Back NextHoldStep CancelDone M22326 ...

Page 29: ...ct first two digits of current calendar year 20 for year 2005 etc Date Year Lower Select last two digits of current calendar year 05 for year 2005 etc Date Month Select number that represents current calendar month Date Day Select number that represents current calendar date 0130 0140 0150 CHANGE THE FACTORY SETTING FACTORY SETTING ADVANCE TO NEXT INSTALLER SETUP PRESS TO EXIT INSTALLER SETUP GOES...

Page 30: ... on new thermostat 5 Hot Water Heat Only Conventional Gas or Oil hot water heat with three wires connected to new thermostat or for normally closed hot water values with wires connected to R and Y on new thermostat 6 Cool Only Conventional Central air conditioning only 7 Multistage Heat Pumps heat pump with auxiliary or back up heat 8 Multistage Conventional Heating and Cooling 2 stages of Heat wi...

Page 31: ...ct your setting press the Next button to go to the next Installer Setup Number M22309 0180 Fan Control in Heating 0 Gas or Oil Heat Heating system controls fan in a call for heat 1 Electric Heat Thermostat controls fan in a call for heat UP ARROW DOWN ARROW SETTING ADVANCE TO NEXT INSTALLER SETUP PRESS TO EXIT INSTALLER SETUP GOES BACK TO LAST INSTALLER SETUP Clock More Done Next Go Back INSTALLER...

Page 32: ...go to the next Installer Setup Number M22310 0190 Heat Pump Changeover Valve 0 Changeover Valve in Cooling Use this setting if you connected a wire labeled O to the O B terminal 1 Changeover Valve in Heating Use this setting if you connected a wire labeled B to the O B terminal UP ARROW DOWN ARROW SETTING ADVANCE TO NEXT INSTALLER SETUP PRESS TO EXIT INSTALLER SETUP GOES BACK TO LAST INSTALLER SET...

Page 33: ...g press the Next button to go to the next Installer Setup Number M22329 0240 Heating Cycle Rate 5 Gas or Oil Furnace less than 90 efficient 9 Electric Furnace 3 Gas or Oil Hot Water Gas 90 High Efficiency Furnace 1 Gas or Oil Steam Gas or Oil Gravity UP ARROW DOWN ARROW SETTING ADVANCE TO NEXT INSTALLER SETUP PRESS TO EXIT INSTALLER SETUP GOES BACK TO LAST INSTALLER SETUP Clock More Done Next Go B...

Page 34: ...the next Installer Setup Number M22311 0320 Temperature Indication Scale 0 Fahrenheit Temperature Display 1 Celsius Temperature Display UP ARROW DOWN ARROW SETTING ADVANCE TO NEXT INSTALLER SETUP PRESS TO EXIT INSTALLER SETUP GOES BACK TO LAST INSTALLER SETUP Clock More Done Next Go Back INSTALLER SETUP NUMBER Period Wake Leave Installer Setup Number Installer Setup Name Select Your Setting Settin...

Page 35: ...30 Daylight Savings 0 Daylight Savings is Off clock will not adjust for Daylight Savings Time 1 Daylight Savings is On clock will automatically adjust for Daylight Savings Time UP ARROW DOWN ARROW SETTING ADVANCE TO NEXT INSTALLER SETUP PRESS TO EXIT INSTALLER SETUP GOES BACK TO LAST INSTALLER SETUP Clock More Done Next Go Back INSTALLER SETUP NUMBER Period Wake Leave Installer Setup Number Instal...

Page 36: ... run time 2 Approximately 3 months based on 30 days of fan run time 3 Approximately 6 months based on 60 days of fan run time 4 Approximately 9 months based on 90 days of fan run time 5 Approximately 1 year based on 120 days of fan run time 6 Approximately 3 years based on 365 days of fan run time UP ARROW DOWN ARROW SETTING ADVANCE TO NEXT INSTALLER SETUP PRESS TO EXIT INSTALLER SETUP GOES BACK T...

Page 37: ...gent RecoveryTM 0 Conventional recovery system starts recovery at programmed time 1 Adaptive Intelligent RecoveryTM system starts early so the setting is reached by the start of programmed period UP ARROW DOWN ARROW SETTING ADVANCE TO NEXT INSTALLER SETUP PRESS TO EXIT INSTALLER SETUP GOES BACK TO LAST INSTALLER SETUP Clock More Done Next Go Back INSTALLER SETUP NUMBER Period Wake Leave Installer ...

Page 38: ...s 29 Congratulations The installation of the thermostat is complete M22315 0640 Clock Format 12 12 hour clock format 24 24 hour clock format UP ARROW DOWN ARROW SETTING ADVANCE TO NEXT INSTALLER SETUP PRESS TO EXIT INSTALLER SETUP GOES BACK TO LAST INSTALLER SETUP Clock More Done Permanent Hold Outside Outside Saved Saved Set To Next Go Back INSTALLER SETUP NUMBER Installer Setup Number Installer ...

Page 39: ...ECTIONS IN OTHER SCREENS DOWN BUTTON LOWERS TEMPERATURE SETTING OR MAKES SELECTIONS IN OTHER SCREENS CLOCK MORE BUTTON SELECTS TIME AND FURNACE FILTER INFORMATION SYSTEM FAN BUTTON SELECTS FAN AUTO OR ON SELECTS HEAT OFF COOL AND EM HEAT SCHEDULE BUTTON SELECTS PROGRAMMING MODE PM System Fan System Fan Schedule Clock More ...

Page 40: ...our Thermostat Display Display M22317 SHOWS CURRENT DAY OF WEEK TEMPERATURE SETTING CURRENT TIME CURRENT SYSTEM SETTING CURRENT FAN SETTING INDICATES THERMOSTAT IS CALLING FOR COOL OR HEAT Schedule he Clock More M Mon System Aux ...

Page 41: ...ontrols the cooling system Em Heat Heat Pump Systems with Auxiliary Heat Thermostat controls emergency heat and auxiliary heat if needed Heat Pump compressor is not operational CAUTION Equipment Damage Hazard Air conditioning compressor damage possible Do not operate cooling system when outdoor temperature is below 50 F 10 C System Fan Schedule Clock More Fan Auto Tue System Auto Heat Off Cool Set...

Page 42: ... 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 circulation or for more efficient air cleaning System Fan FanUseEdit CancelDone Fan Auto System Auto Em Heat Off Cool M22305 ...

Page 43: ...ortable temperature Leave Period when you are away from home and want an energy saving temperature Return Period when you return home and want your home back to a comfortable temperature Sleep Period when you are asleep and want an energy saving temperature Edit Schedule 1 Press the Schedule button Press the View button to look at the schedule without editing the schedule System Fan Schedule Clock...

Page 44: ...69 1726 1 44 Program Your Heating and Cooling Schedule Cont 2 Press the Edit button Go Back Edit View M22331 Mon Tue Wed Thu Fri Sat Sun ...

Page 45: ...duled with the same times and temperatures Checkmarks appear next to the days selected You can select Mon Fri as a block of days and select Saturday and Sunday separately Use the Up and Down buttons to move up and down the list of days Use the Select Day or DeSelect Day button to select the days you want to schedule M22332 Mon Tue Wed Thu Fri Sat Sun Select Day Next Step Cancel ...

Page 46: ...e 9 Press the Next Step button to select the Cooling temperature 10 Use the Up and Down arrow buttons to change the temperature 11 Repeat steps 5 through 10 for the Leave Return and Sleep schedules M22333 DAYS SELECTED NEXT STEP BUTTON ADVANCES PERIOD TIME HEAT AND COOL TEMPERATURES SCHEDULE PERIOD HEAT OR COOL TEMPERATURES GO BACK BUTTON GOES BACK TO THE LAST SCHEDULE STEP DONE BUTTON EXITS AND S...

Page 47: ...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 or Sunday to schedule use the Down arrow button until Sat or Sun is flashing When the desired day s is flashing press the Select Day button M22334 Mon Tue Wed Thu Fri Sat Saved ...

Page 48: ...ess 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: ...y 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 the Use Schedule button to cancel Temporary temperature and resume schedule MOVES TEMPERATURE SETTING UP OR DOWN M22336 ...

Page 50: ...d 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 Press the Use Schedule button to cancel Permanent Hold and resume the schedule The display shows Permanent Hold until it is cancelled System Fan Use Schedule Clock More Tue System M22337 PM Fan ...

Page 51: ...r 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 feature on or off Reset Schedule Clock More Tue System Heat M22338 Fan PM ...

Page 52: ...ange 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 feature on or off Reset Days M22339 Change Filter Next Done ...

Page 53: ...ns on the heatingor coolingat just theright time to have your home reachyour scheduled temperature at your scheduled time For example you get out of bed at 6 00 AM andwant the temperature to be70 F Set the Wake periodfor 6 00AM and 70 F Thethermostat thenturns on theheat before6 00AM to raise thetemperature to70 F by6 00AM The thermostat alertsthat the heating or cooling system is coming on before...

Page 54: ... 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 55: ...55 69 1726 1 Replace Batteries Cont 3 Remove the old batteries and insert two fresh AA alkaline batteries as marked on the thermostat M22259 BACK OF THERMOSTAT BATTERY HOLDER BATTERIES 2 ...

Page 56: ...atteries 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: ...ka line batteries do not last as long and can leak causing thermostat damage 3 Although the thermostat has a Low Battery indica tor replace the batteries once a year to prevent the thermostat and heating cooling system from shut ting down due to lack of battery power 4 As a precaution replace the batteries when leaving your home for more than a month to prevent your heating cooling system from shu...

Page 58: ...tdown The minimum off timer is activated after the compressor turns off If there is a call during the minimum off timer the thermostat shows Wait in the display When the minimum off timer expires Cool On or Heat On a appears solidly in the display and the compressor and fan turn on _________ a Heat Pumps only System Fan Schedule Clock More Tue System Fan Auto Wait Cool AM Set To M22341 ...

Page 59: ... at heating and or cooling system to be sure it is on Check the furnace door to be sure it is closed securely Wait five minutes for the heating system to respond If all of this was checked contact your local heating and cooling contractor Cooling system does not turn on Set the system to Cool by pressing the System button Check the cool temperature setting to be sure it is set below the room tempe...

Page 60: ... setting below the room temperature If Cool On is shown solidly in the display but the cooling system does not turn on see Cooling system does not turn on in the Troubleshooting Tips Wait shows in the display Compressor minimum off timer is active Wait up to five minutes for the cooling or heating system to turn on Fan does not turn on in a call for heat electric fur naces only Check Installer Set...

Page 61: ...pe and make sure the setting matches the installed heating and or cooling system Heating system does not turn off and the heat temperature setting is set below the room temperature Heat On is not shown in display Check Installer Setup Number 0170 Heating and or Cooling System Type and make sure the setting matches the installed heating and or cooling system Red LED is on in the upper left corner a...

Page 62: ...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: ... of the malfunction and mail it postage prepaid to the following address Honeywell Return Goods Dock 4 MN10 3860 1885 Douglas Dr N Golden Valley MN 55422 This warranty does not cover removal or reinstallation costs This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer Honeyw...

Page 64: ...RCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY Some states do not allow limitations on how long an implied warranty lasts so the above limitation may not apply to you This warranty gives you specific legal rights and you may have other rights which vary from state to state If you have any questions concerning this warranty please writ...

Reviews: