Owner's Manual
Page 1
Registered Trademark © 2004 Honeywell International Inc. All Rights Reserved 69-1725-1 Read and Save these Instructions U.S. Pat. 6,595,430 Other Patents Pending ® U.S. RTH8500D Touch Screen Programmable Thermostat OWNER'S GUIDE 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.
Registered Trademark © 2004 Honeywell International Inc. All Rights Reserved 69-1725-1 Read and Save these Instructions U.S. Pat. 6,595,430 Other Patents Pending ® U.S. RTH8500D Touch Screen Programmable Thermostat OWNER'S GUIDE 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.
Owner's Manual
Page 2
... Wallplate to Wall 11 Connect Wires to New Wallplate 15 Install Batteries 22 Attach New Thermostat to Wallplate 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 Protection...
... Wallplate to Wall 11 Connect Wires to New Wallplate 15 Install Batteries 22 Attach New Thermostat to Wallplate 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 Protection...
Owner's Manual
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... with the terminal of the items shown above are included: Inside Set OWNER'S GUIDE Inside Set To Read and save these instructions WALLPLATE THERMOSTAT MOUNTING SCREWS (2) AND WALL ANCHORS (2) OWNER'S GUIDE WIRE LABELS CAUTION CARD CAUTION TURN OFF POWER to the store. 3 69-1725-1 Step 1.... Check that the following items are missing, call Honeywell Customer Care at 1-800-468-1502 before returning the thermostat to system at the furnace, or at the fuse/circuit breaker panel before you begin.
... with the terminal of the items shown above are included: Inside Set OWNER'S GUIDE Inside Set To Read and save these instructions WALLPLATE THERMOSTAT MOUNTING SCREWS (2) AND WALL ANCHORS (2) OWNER'S GUIDE WIRE LABELS CAUTION CARD CAUTION TURN OFF POWER to the store. 3 69-1725-1 Step 1.... Check that the following items are missing, call Honeywell Customer Care at 1-800-468-1502 before returning the thermostat to system at the furnace, or at the fuse/circuit breaker panel before you begin.
Owner's Manual
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These Installation Instructions explain later how to use the enclosed wire labels to correctly mark the wires connected to the heating and/or cooling system. OLD THERMOSTAT YELLOW WHITE Y W RED G GREEN RC R ORANGE ! DO NOT WIRE NEW THERMOSTAT BASED ON WIRE COLOR. Do not connect the wires to the new thermostat based on wire color because damage can occur to your old thermostat. M22034 5 69-1725-1 Follow Important Instructions 1. Step 2.
These Installation Instructions explain later how to use the enclosed wire labels to correctly mark the wires connected to the heating and/or cooling system. OLD THERMOSTAT YELLOW WHITE Y W RED G GREEN RC R ORANGE ! DO NOT WIRE NEW THERMOSTAT BASED ON WIRE COLOR. Do not connect the wires to the new thermostat based on wire color because damage can occur to your old thermostat. M22034 5 69-1725-1 Follow Important Instructions 1. Step 2.
Owner's Manual
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... 3. Turn off power at the heating and/or cooling system or fuse/circuit breaker panel. 2. Y G C OLD THERMOSTAT WALLPLATE W THERMOSTAT R COVER .2.18 .9 .7 .5 L O .25 N GE R .4 .3 M22036 MERCURY NOTICE If you are replacing a thermostat that contains mercury in a sealed tube, do not place your local waste management authority for instructions regarding recycling and the proper disposal...
... 3. Turn off power at the heating and/or cooling system or fuse/circuit breaker panel. 2. Y G C OLD THERMOSTAT WALLPLATE W THERMOSTAT R COVER .2.18 .9 .7 .5 L O .25 N GE R .4 .3 M22036 MERCURY NOTICE If you are replacing a thermostat that contains mercury in a sealed tube, do not place your local waste management authority for instructions regarding recycling and the proper disposal...
Owner's Manual
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Follow Special Instructions 1. If you have two C and/or C1 wires connected to your new thermostat. 2. Make sure they do not connect them to your old thermostat, do not touch each C and/or C1 wire with electrical tape. Disconnect the C and/or C1 wires. OLD THERMOSTAT Y G C C W R LETTER DESIGNATION SCREW TERMINAL WIRE WIRE HOLE DO NOT CONNECT TO NEW THERMOSTAT M22201 7 69-1725-1 Step 4. Wrap the bare end of each other or any other wires. 3.
Follow Special Instructions 1. If you have two C and/or C1 wires connected to your new thermostat. 2. Make sure they do not connect them to your old thermostat, do not touch each C and/or C1 wire with electrical tape. Disconnect the C and/or C1 wires. OLD THERMOSTAT Y G C C W R LETTER DESIGNATION SCREW TERMINAL WIRE WIRE HOLE DO NOT CONNECT TO NEW THERMOSTAT M22201 7 69-1725-1 Step 4. Wrap the bare end of each other or any other wires. 3.
Owner's Manual
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If you have only one C and/or C1 wire connected to your old thermostat, connect this wire to the store. OLD THERMOSTAT Y G C W R LETTER DESIGNATION SCREW TERMINAL WIRE WIRE HOLE CONNECT TO THE "C" ON THE NEW THERMOSTAT M22223 69-1725-1 8 Visit www.honeywell.com/yourhome or call Honeywell Customer Care at 1-800-468-1502 before returning the thermostat to C on the new thermostat. 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 the store. OLD THERMOSTAT Y G C W R LETTER DESIGNATION SCREW TERMINAL WIRE WIRE HOLE CONNECT TO THE "C" ON THE NEW THERMOSTAT M22223 69-1725-1 8 Visit www.honeywell.com/yourhome or call Honeywell Customer Care at 1-800-468-1502 before returning the thermostat to C on the new thermostat. Step 4. Follow Special Instructions (Cont) 4.
Owner's Manual
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Wrap the end of the wires that are not connected with electrical tape. Follow Special Instructions (Cont) 5. DO NOT CONNECT TO NEW THERMOSTAT M22040 9 69-1725-1 Step 4. OLD THERMOSTAT Y G RC W R LETTER DESIGNATION SCREW TERMINAL WIRE WIRE HOLE WIRES NOT CONNECTED - If you find any wires not 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. Follow Special Instructions (Cont) 5. DO NOT CONNECT TO NEW THERMOSTAT M22040 9 69-1725-1 Step 4. OLD THERMOSTAT Y G RC W R LETTER DESIGNATION SCREW TERMINAL WIRE WIRE HOLE WIRES NOT CONNECTED - If you find any wires not connected to your old thermostat, do not connect them to your new thermostat. 6.
Owner's Manual
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... G Y G RC W R R WIRE LABEL LETTER DESIGNATION SCREW TERMINAL WIRE WIRE HOLE M22039 When connecting the wires to the new thermostat, refer to wrap a wire label around each wire, use the enclosed wire labels to the wire labels. As you disconnect each wire that matches the ...letter designation. Do not connect wires to fall into the wall opening after the wires are disconnected. 2. Do not allow the wires to your new thermostat based on the color of the old thermostat from the wall. Step 5. Label Old...
... G Y G RC W R R WIRE LABEL LETTER DESIGNATION SCREW TERMINAL WIRE WIRE HOLE M22039 When connecting the wires to the new thermostat, refer to wrap a wire label around each wire, use the enclosed wire labels to the wire labels. As you disconnect each wire that matches the ...letter designation. Do not connect wires to fall into the wall opening after the wires are disconnected. 2. Do not allow the wires to your new thermostat based on the color of the old thermostat from the wall. Step 5. Label Old...
Owner's Manual
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Separate the wallplate from the thermostat as shown. WALLPLATE WIRE HOLE THERMOSTAT M22202 11 69-1725-1 Step 6. Mount New Wallplate to Wall 1.
Separate the wallplate from the thermostat as shown. WALLPLATE WIRE HOLE THERMOSTAT M22202 11 69-1725-1 Step 6. Mount New Wallplate to Wall 1.
Owner's Manual
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Connect Wires to follow for your system. If wires are to wire the new thermostat. If you have a heat pump system, use the CONVENTIONAL letter designations. Match the labeled wires to the letter designations on page 29 to both Rc ...
Connect Wires to follow for your system. If wires are to wire the new thermostat. If you have a heat pump system, use the CONVENTIONAL letter designations. Match the labeled wires to the letter designations on page 29 to both Rc ...
Owner's Manual
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... each terminal. CONVENTIONAL Possible letter letter designations designations on on page 20 if you are wiring a Heat Pump System. Use the information on the new thermostat the labeled wires 1 RC 1 R RC or R R or RH, 4, V W or W1, H W Y or Y1, M Y G or F G C or C1, X, B C Y2 Y2 W2 W2 2 2 34 M22208... Do not connect more than one wire to New Wallplate (Cont) 7. These numbered notes appear on your old and new thermostats. Compare letter designations on the next page. 17 69-1725-1 Step 7. Be sure to read the notes referenced in the numbered triangles above.
... each terminal. CONVENTIONAL Possible letter letter designations designations on on page 20 if you are wiring a Heat Pump System. Use the information on the new thermostat the labeled wires 1 RC 1 R RC or R R or RH, 4, V W or W1, H W Y or Y1, M Y G or F G C or C1, X, B C Y2 Y2 W2 W2 2 2 34 M22208... Do not connect more than one wire to New Wallplate (Cont) 7. These numbered notes appear on your old and new thermostats. Compare letter designations on the next page. 17 69-1725-1 Step 7. Be sure to read the notes referenced in the numbered triangles above.
Owner's Manual
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...Connect Wires to New Wallplate (Cont) NOTES FOR CONVENTIONAL HEATING AND COOLING SYSTEMS 1 If wires will be connected on the new thermostat. 2 If wires were connected to the "C" letter designation on the new thermostat. Connect the old R to the new RC and the old RH to the new R. 3 If two C and/or... of each wire separately with electrical tape and do not connect them to both R and RH terminals on the old thermostat, remove metal jumper wire between RC and R on the new thermostat, remove metal jumper wire between RC and R. Step 7. Leave metal jumper wire in place if only one C and/or...
...Connect Wires to New Wallplate (Cont) NOTES FOR CONVENTIONAL HEATING AND COOLING SYSTEMS 1 If wires will be connected on the new thermostat. 2 If wires were connected to the "C" letter designation on the new thermostat. Connect the old R to the new RC and the old RH to the new R. 3 If two C and/or... of each wire separately with electrical tape and do not connect them to both R and RH terminals on the old thermostat, remove metal jumper wire between RC and R on the new thermostat, remove metal jumper wire between RC and R. Step 7. Leave metal jumper wire in place if only one C and/or...
Owner's Manual
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Use the information below if you are wiring a HEAT PUMP System. These numbered notes appear on your old and new thermostats. Possible letter designations on the labeled wires HEAT PUMP letter designations on the new thermostat 1 2 VR or V or R 3 H or B, O Y1 or M or Y F or G 3 X or B, C F or L X2 or X, E 4 AUX, W1, W or W2 RC R O/B Y G C L E AUX M22210 Be sure to New Wallplate (Cont) 8. Compare letter designations on the next page. 19 69-1725-1 Connect Wires to read the note referenced in the numbered triangles above. Step 7.
Use the information below if you are wiring a HEAT PUMP System. These numbered notes appear on your old and new thermostats. Possible letter designations on the labeled wires HEAT PUMP letter designations on the new thermostat 1 2 VR or V or R 3 H or B, O Y1 or M or Y F or G 3 X or B, C F or L X2 or X, E 4 AUX, W1, W or W2 RC R O/B Y G C L E AUX M22210 Be sure to New Wallplate (Cont) 8. Compare letter designations on the next page. 19 69-1725-1 Connect Wires to read the note referenced in the numbered triangles above. Step 7.
Owner's Manual
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Call your local heating and cooling contractor for assistance. Step 7. Call your local heating and cooling contractor for assistance. 3 If the old thermostat had wires on both the V and VR, some system modification is required. M22245 69-1725-1 20 If another wire is required. Connect ...Wires to the C letter designation on W1, Y1 and W2, some system modification is already matched to the C, contact Honeywell. 4 If the old thermostat had separate wires on both O and B, be sure to attach the B wire to New Wallplate (Cont) NOTES FOR HEAT PUMP SYSTEMS 1...
Call your local heating and cooling contractor for assistance. Step 7. Call your local heating and cooling contractor for assistance. 3 If the old thermostat had wires on both the V and VR, some system modification is required. M22245 69-1725-1 20 If another wire is required. Connect ...Wires to the C letter designation on W1, Y1 and W2, some system modification is already matched to the C, contact Honeywell. 4 If the old thermostat had separate wires on both O and B, be sure to attach the B wire to New Wallplate (Cont) NOTES FOR HEAT PUMP SYSTEMS 1...
Owner's Manual
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Remove the tab labeled "Remove during installation" in the lower right corner of the thermostat as marked on the back of the thermostat back. Install Batteries 1. REMOVE TAB REMOVE DURING INSTALLATION REMOVE DURING INSTALLATION 69-1725-1 M19920 22 Install three fresh AAA alkaline batteries on the thermostat. Step 8. BACK OF THERMOSTAT ++ + BATTERIES (3) M22212 2.
Remove the tab labeled "Remove during installation" in the lower right corner of the thermostat as marked on the back of the thermostat back. Install Batteries 1. REMOVE TAB REMOVE DURING INSTALLATION REMOVE DURING INSTALLATION 69-1725-1 M19920 22 Install three fresh AAA alkaline batteries on the thermostat. Step 8. BACK OF THERMOSTAT ++ + BATTERIES (3) M22212 2.
Owner's Manual
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Push the thermostat straight onto the wallplate until it snaps into the wall opening. 23 69-1725-1 Step 9. WALLPLATE TERMINAL SCREW BLOCK PINS ON BACK OF THERMOSTAT M22213 2. If the wires interfere with the pins on the power at the heating and/or cooling system or fuse/ circuit breaker panel. Turn on the back of the thermostat. Align the screw blocks with mounting the thermostat to Wallplate 1. Attach New Thermostat to the wallplate, push the excess wire back into place. 3.
Push the thermostat straight onto the wallplate until it snaps into the wall opening. 23 69-1725-1 Step 9. WALLPLATE TERMINAL SCREW BLOCK PINS ON BACK OF THERMOSTAT M22213 2. If the wires interfere with the pins on the power at the heating and/or cooling system or fuse/ circuit breaker panel. Turn on the back of the thermostat. Align the screw blocks with mounting the thermostat to Wallplate 1. Attach New Thermostat to the wallplate, push the excess wire back into place. 3.
Owner's Manual
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SET CURRENT DATE SET MONTH MON TUE WED THU FRI DONE USE ARROWS TO SET YEAR M22226 The calendar can be set the calendar. 1. Step 10. When the thermostat is first powered, the display is set the year, month and day. 2. Use the arrow keys to set any time. Press the Done key. Set the Calendar This thermostat is designed to ten years, under normal use, once the calendar is ready to set . See Step 11, Configure Installer Setup, for up to automatically keep current time and day in memory for instructions. 69-1725-1 24
SET CURRENT DATE SET MONTH MON TUE WED THU FRI DONE USE ARROWS TO SET YEAR M22226 The calendar can be set the calendar. 1. Step 10. When the thermostat is first powered, the display is set the year, month and day. 2. Use the arrow keys to set any time. Press the Done key. Set the Calendar This thermostat is designed to ten years, under normal use, once the calendar is ready to set . See Step 11, Configure Installer Setup, for up to automatically keep current time and day in memory for instructions. 69-1725-1 24
Owner's Manual
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Use the Installer Setup Menu to match your new thermostat to set up your heating and/or cooling system. Step 11. FAN ON Inside AUTO THU Set To SYSTEM EM HEAT OFF COOL Following Schedule AM SCHED HOLD CLOCK SCREEN M22225 69-1725-1 26 Press and release the System key. Follow the steps in this section to your thermostat. 2. Configure Installer Setup 1.
Use the Installer Setup Menu to match your new thermostat to set up your heating and/or cooling system. Step 11. FAN ON Inside AUTO THU Set To SYSTEM EM HEAT OFF COOL Following Schedule AM SCHED HOLD CLOCK SCREEN M22225 69-1725-1 26 Press and release the System key. Follow the steps in this section to your thermostat. 2. Configure Installer Setup 1.
Owner's Manual
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TUE CHANGE FILTER UV LAMP HUMIDIFIER PAD Inside Set To SYSTEM EM HEAT OFF COOL Following Schedule PM DONE CANCEL M19969 4. Release the center key when the display on your thermostat matches the display below. Configure Installer Setup (Cont) 3. MON WED THU FRI SAT SUN DONE 27 M22214 69-1725-1 Press and hold the center blank key for approximately five seconds, until the screen changes. Step 11.
TUE CHANGE FILTER UV LAMP HUMIDIFIER PAD Inside Set To SYSTEM EM HEAT OFF COOL Following Schedule PM DONE CANCEL M19969 4. Release the center key when the display on your thermostat matches the display below. Configure Installer Setup (Cont) 3. MON WED THU FRI SAT SUN DONE 27 M22214 69-1725-1 Press and hold the center blank key for approximately five seconds, until the screen changes. Step 11.