Honeywell RTH8500D - 7-Day Touchscreen Universal Programmable Thermostat Owner'S Manual Download

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69-1725-1

Built-in Compressor Protection

The RTH8500D 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-off timer, the thermostat shows

“Wait” in the display.

When the minimum-off timer expires, “Cool On” or “Heat On”

appears solidly in the display and the compressor and fan turn on.

_________

Heat Pumps only.

M22244

Wait

Cool

SCHED

HOLD

CLOCK SCREEN

WED

FAN

AUTO

SYSTEM

HEAT

COOL

Following

Schedule

Inside

Set To

Summary of Contents for RTH8500D - 7-Day Touchscreen Universal Programmable Thermostat

Page 1: ... 1 RTH8500D Touch Screen Programmable Thermostat The RTH8500D 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: ...e 23 Set the Calendar 24 Configure Installer Setup 26 Get to Know Your Thermostat Display 38 Set System Setting 40 Program Your Heating and Cooling Schedule 42 Cancel a Schedule Period 46 Set Time 47 Set Temperature Overrides 48 Clean Your Thermostat Screen 51 Use Your Filter Timer 52 Understanding Temperature Recovery Feature 53 Replace Batteries 54 Review Battery Tips 57 Built in Compressor Prot...

Page 3: ...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 N 69 0823EFS 5 03 yourhome B G R V VR X B G R V VR X Y2 H RC W X1 Y2 H RC W C L RH W1 X2 C L RH W1 E O T W2 Y E O T W2 F P U W3 Y1 F P U W3 WALLPLATE THERMOSTAT M22200 MOUNTING SCREWS 2 AND WALL ANCHORS 2 OWNER S GUIDE CAUTION CARD WIRE LABELS Rea...

Page 4: ...eck that you have everything required for the installation Three AAA 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: ...allplate 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: ...r old thermostat connect this wire to C on the new thermostat Visit www honeywell com yourhome or call Honeywell Customer Care at 1 800 468 1502 before returning the thermostat to the store 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 1725 1 Step 6 Mount New Wallplate to Wall 1 Separate the wallplate from the thermostat as shown THERMOSTAT WALLPLATE WIRE HOLE M22202 ...

Page 12: ...69 1725 1 12 Step 6 Mount New Wallplate to Wall Cont 2 Pass the labeled wires through the wire hole on the wallplate M22203 WALL OPENING LABELED WIRES WALLPLATE WIRE HOLE ...

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 M22204 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 M22205 DRILLED HOLES 2 WALL ANCHORS 2 MOUNTING SCREWS 2 WALLPLATE ...

Page 15: ... have a heat pump system use the HEAT PUMP letter designations to wire the new thermostat 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 See table on page 29 to help you determine if you have a CONVENTIONAL or HEAT PUMP system M22206 W...

Page 16: ...de 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 M22207 LABELED WIRES C NOT USED G W R RC SCREW TERMINALS TERMINAL BLOCK LETTER DESIGNATIONS Y INSERT WIRE IN HOLE WIRE HOLE R C W R G WALLPLATE Y ...

Page 17: ... 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 18: ...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 19: ...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 20: ...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 21: ...21 69 1725 1 Step 7 Connect Wires to New Wallplate Cont 9 Push excess wire back into the wall opening Keep wires in the shaded area WALLPLATE M22211 WALL OPENING WIRE SHADED AREA ...

Page 22: ...tteries on the back of the thermostat as marked on the thermostat 2 Remove the tab labeled Remove during installation in the lower right corner of the thermostat back BACK OF THERMOSTAT M22212 BATTERIES 3 REMOVE DURING INSTALLATION M19920 REMOVE TAB REMOVE DURING INSTALLATION ...

Page 23: ...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 M22213 PINS ON BACK OF THERMOSTAT WALLPLATE TERMINAL SCREW BLOCK ...

Page 24: ...l use once the calendar is set When the thermostat is first powered the display is ready to set the calendar 1 Use the arrow keys to set the year month and day 2 Press the Done key The calendar can be set any time See Step 11 Configure Installer Setup for instructions DONE MON TUE WED THU FRI M22226 W USE ARROWS TO SET YEAR SET CURRENT DATE SET MONTH ...

Page 25: ...25 69 1725 1 Step 10 Set the Calendar Cont 3 Use the arrow keys to set the current time 4 Press the Done key DONE MON WED THU FRI SAT A AT M22227 USE ARROWS TO SET TIME ...

Page 26: ... 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 key SCHED HOLD CLOCK SCREEN FAN ON AUTO AM THU SYSTEM EM HEAT OFF COOL Following Schedule Inside Set To M22225 ...

Page 27: ...proximately five seconds until the screen changes 4 Release the center key when the display on your thermostat matches the display below DONE CANCEL TUE PM SYSTEM EM HEAT OFF COOL CHANGE FILTER UV LAMP HUMIDIFIER PAD Following Schedule Inside Set To M19969 DONE MON WED THU FRI SAT A AT SUN M22214 ...

Page 28: ...ers 0130 0140 and 0150 to complete setting the calendar CHANGE THE FACTORY SETTING FACTORY SETTING PRESS TO EXIT INSTALLER SETUP DONE INSTALLER SETUP NUMBER ADVANCE TO NEXT INSTALLER SETUP M22215 0120 Date Year Upper Select 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 tha...

Page 29: ...r conditioning Typically wires are R W and G 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 open hot water valves 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 Convention...

Page 30: ...for Installer Setup Number 0180 12 After you select your setting press the Up arrow key to go to the next Installer Setup Number M22217 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 PRESS TO EXIT INSTALLER SETUP Installer Setup Number Installer Setup Name Select You...

Page 31: ...you select your setting press the Up arrow key to go to the next Installer Setup Number M22228 0190 UP ARROW DOWN ARROW SETTING PRESS TO EXIT INSTALLER SETUP Installer Setup Number Installer Setup Name Select Your Setting Settings DONE INSTALLER SETUP NUMBER UP ARROW 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 Ch...

Page 32: ...Setup Number 0240 18 After you select your setting press the Up arrow key to go to the next Installer Setup Number M22342 0240 UP ARROW DOWN ARROW SETTING PRESS TO EXIT INSTALLER SETUP Installer Setup Number Installer Setup Name Select Your Setting Settings DONE INSTALLER SETUP NUMBER UP ARROW Heating Cycle Rate 5 Gas or Oil Furnace less than 90 efficient 9 Electric Furnace 3 Gas or Oil Hot Water ...

Page 33: ...select your setting press the Up arrow to go to the next Installer Setup Number M22218 0320 UP ARROW DOWN ARROW SETTING PRESS TO EXIT INSTALLER SETUP Installer Setup Number Installer Setup Name Select Your Setting Settings DONE INSTALLER SETUP NUMBER UP ARROW Temperature Indication Scale 0 Fahrenheit Temperature Display 1 Celsius Temperature Display ...

Page 34: ... go to the next Installer Setup Number M22219 0330 UP ARROW DOWN ARROW SETTING PRESS TO EXIT INSTALLER SETUP Installer Setup Number Installer Setup Name Select Your Setting Settings DONE INSTALLER SETUP NUMBER UP ARROW 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 ...

Page 35: ...tup Number Installer Setup Name Select Your Setting Settings DONE INSTALLER SETUP NUMBER UP ARROW Furnace Filter Change Reminder 0 Furnace Filter change reminder is Off 1 Approximately 1 month based on 10 days of fan 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 ...

Page 36: ...taller Setup Number M22221 0530 UP ARROW DOWN ARROW SETTING PRESS TO EXIT INSTALLER SETUP Installer Setup Number Installer Setup Name Select Your Setting Settings DONE INSTALLER SETUP NUMBER UP ARROW Adaptive Intelligent 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 progra...

Page 37: ...ess the Done key to exit the Installer Setup and save your settings 29 Congratulations The installation of the thermostat is complete M22222 0640 UP ARROW DOWN ARROW SETTING PRESS TO EXIT INSTALLER SETUP Installer Setup Number Installer Setup Name Select Your Setting Settings DONE INSTALLER SETUP NUMBER UP ARROW Clock Format 12 12 hour clock format 24 24 hour clock format ...

Page 38: ...22238 FAN SELECTS ON AUTO SYSTEM SELECTS EM HEAT HEAT OFF COOL UP ARROW RAISES TEMPERATURE SETTING U n DOWN ARROW LOWERS TEMPERATURE SETTING SCHED ENTERS SCHEDULING MODE MORE SHOWS FURNACE FILTER CHANGE REMINDER SCREEN LOCKS OUT THE SCREEN TO ALLOW FOR CLEANING CLOCK SETS THE TIME FORWARD OR BACK HOLD SETS A PERMANENT HOLD AND ACTIVITIES VACATION HOLD ...

Page 39: ...SHOWS FAN SETTING TUE SHOWS CURRENT DAY OF THE WEEK SYSTEM SHOWS CURRENT SYSTEM POSITION TIME DISPLAY CURRENT TIME OF DAY HOLD TIME REMAINING OR NUMBER OF VACATION DAYS REMAINING INSIDE TEMPERATURE SHOWS THE CURRENT INSIDE TEMPERATURE SET TO TEMPERATURE SHOWS THE CURRENT SET TEMPERATURE FOLLOWING SCHEDULE SHOWS THE THERMOSTAT IS FOLLOWING THE PROGRAMMED SCHEDULE ...

Page 40: ...trols 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 SCHED HOLD CLOCK SCREEN THU AM FAN AUTO SYSTEM HEAT Following Schedule Insi...

Page 41: ... 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 SCHED HOLD CLOCK SCREEN THU AM FAN AUTO SYSTEM HEAT Following Schedule Inside Set To M22262 ...

Page 42: ...fortable 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 Sched key SCHED HOLD CLOCK SCREEN FRI AM PM FAN AUTO SYSTEM HEAT Following Schedule Inside Set To M22445 ...

Page 43: ... Edit key SCHED SCHED HOLD HOLD CLOCK SCREEN DONE WAKE LEAVE RETURN SLEEP CANCEL MON TUE WED THU FRI SAT SUN AM PM PM FAN AUTO SYSTEM EM HEAT HEAT OFF COOL AUTO CANCEL PERIOD HEAT COOL Following Schedule Inside Set To OK TO PICK MULTIPLE DAYS SCREEN LOCKED M22553 EDIT ...

Page 44: ...to days selected 4 Press Wake key Once pressed Wake flashes to show it is selected 5 Press Up and Down keys to modify time and heat and cool tem peratures from this screen 6 Press Leave key and repeat step 5 7 Press Return key and repeat step 5 8 Press Sleep key and repeat step 5 DONE WAKE LEAVE RETURN SLEEP CANCEL MON TUE WED THU FRI SAT SUN AM FAN ON AUTO CIRC CANCEL PERIOD HEAT COOL OK TO PICK ...

Page 45: ...to indicate changes are being saved to the day s modified 10 To set a Program Schedule for the remaining days of the week repeat steps 1 9 Example If Mon Fri was selected first go back and repeat steps 1 9 for Sat and Sun To exit schedule without saving changes press Cancel key any time MON TUE WED THU FRI SAVING CHANGES M19956 ...

Page 46: ...y 3 Select the Day s of the week desired 4 Press schedule period you want to cancel Wake Leave Return or Sleep Once selected the period flashes 5 Press Cancel Period key The time temperature s and fan set ting disappear The bar above the selected period is removed indicating the scheduled period was cancelled 6 Press Done key To reinstate a schedule period press arrow keys to set desired time and ...

Page 47: ...ime Set Time 1 Press Clock 2 Use the arrows to set the current time 3 Press the Done key The current day of the week should already be set correctly If not see Step 11 Configure Installer Setup DONE CANCEL TUE AM M19958 ...

Page 48: ...led period 2 Press the Up or Down arrow next to the Time key to set the desired time for the thermostat to resume the schedule 3 Press the Cancel or Sched key to cancel Hold Temperature Until and resume schedule Following Schedule appears on the screen to indicate that the Temporary Hold has ended The Time Up and Down arrows are shown for approximately seven seconds Pressing on the screen time whe...

Page 49: ...he Hold key Permanent Hold appears on the screen 2 Press the Up or Down arrow next to the temperature you want to set during Hold 3 Press the Cancel key to cancel Permanent Hold and resume the schedule The screen shows Permanent Hold until it is cancelled SCHED HOLD CLOCK SCREEN CANCEL TUE AM FAN AUTO SYSTEM HEAT Inside Set To Permanent Hold M19960 ...

Page 50: ...ires after the number of days you selected ends 2 Press the Hold key twice Screen shows Hold Temperature Until 1 day 3 Press the Up and Down arrow keys to change the number of Days you desire the thermostat to override the schedule 4 To cancel Vacation Hold override early press the Cancel key When the number of days of Vacation Hold expires the screen shows Following Schedule to indicate that Vaca...

Page 51: ...ened with water or household glass cleaner to clean the screen 3 Repeat the above steps as necessary 4 Press the Done key to return to the Home Screen and normal operation Do not spray any type of liquid directly onto the thermostat itself If using household glass cleaner spray the cleaner on a cloth Then use the cloth to clean the thermostat screen OK TO CLEAN SCREEN M19964 ...

Page 52: ...value Use the Up or Down arrow keys to change the number of run Time Days See Configure Installer Setup Number 0500 for approximate calendar days 3 Press the Done key to go back to viewing the filter timer 4 Press the Reset key to reset the timer to the timer reload value This is the setting you set in the Installer Setup or the new reload value you selected in step 2 5 Press the Done key SCHED HO...

Page 53: ...oling at just the right time to have your home reach your scheduled temperature at your scheduled time For example you get out of bed at 6 00 AM and want the temper ature to be 70 F Set the Wake period for 6 00 AM and 70 F The thermostat then turns on the heat before 6 00 AM to raise the temperature to 70 F by 6 00 AM The thermostat alerts that the heating or cooling system is coming on before a s...

Page 54: ...Replace Batteries 1 When the LO Battery indicator is flashing replace the batteries promptly with three fresh AAA alkaline batteries 2 Remove thermostat from the wallplate by pulling straight out M19963 M22243 WALL ...

Page 55: ...55 69 1725 1 Replace Batteries Cont 3 Remove the old batteries and insert three fresh AAA alkaline batteries as marked on the thermostat BACK OF THERMOSTAT M22212 BATTERIES 3 ...

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 M22213 PINS ON BACK OF THERMOSTAT WALLPLATE TERMINAL SCREW BLOCK ...

Page 57: ...alkaline batteries do not last as long and can leak causing thermostat damage 3 Although the thermostat has a Low Battery indicator replace the batteries once a year to prevent the thermostat and heating cooling system from shutting 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 shut...

Page 58: ...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 M22244 WaitCool SCHED HOLD CLOCK SCREEN MORE WED AM PM FAN AUTO SYSTEM HEAT COOL Following Schedule Inside ...

Page 59: ...n the display Check the circuit breaker to be sure it is not tripped Check power switch 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 Sys...

Page 60: ...es 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 furnaces only Check Installer Setup Number 0180 Fan Control in Heating and make sure it is set to Electric Heat Heat pump puts out cool air in the heat mode and warm air in t...

Page 61: ...tting 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 right corner and the Heat Pump is not working A system monitor is wired to the thermostat L terminal See Heating or Cooling system does not turn on in the...

Page 62: ...69 1725 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 a consumer Honeywell s sole responsibility shall be to repair or replace the product within the terms stated above HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING DIRECTLY OR INDIRECTLY FROM ANY BREACH OF ANY WARRANTY EXPRESS OR IMPLIED OR ANY OTHER FAILURE OF THIS PRODUCT Some states do not allow the exclusion or lim...

Page 64: ...0 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 Ontario M1V 4Z9 ...

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