Owner's Manual
Page 1
Read and Save these Instructions U.S. Pat. 6,595,430 Other Patents Pending ® U.S. Registered Trademark © 2004 Honeywell International Inc. All Rights Reserved 69-1725-1 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.
Read and Save these Instructions U.S. Pat. 6,595,430 Other Patents Pending ® U.S. Registered Trademark © 2004 Honeywell International Inc. All Rights Reserved 69-1725-1 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
... Instructions 5 Remove 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 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...
... Instructions 5 Remove 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 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...
Owner's Manual
Page 3
... letter of your old thermostat wire 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 system at the furnace, or at 1-800-468-1502 before you begin. Check that the following items are missing, call Honeywell Customer Care at...
... letter of your old thermostat wire 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 system at the furnace, or at 1-800-468-1502 before you begin. Check that the following items are missing, call Honeywell Customer Care at...
Owner's Manual
Page 15
If you have a standard heating and/or cooling system, use the HEAT PUMP letter designations to wire the new thermostat. Step 7. WALLPLATE METAL JUMPER WIRE TERMINAL BLOCK SCREW TERMINALS LETTER DESIGNATIONS RC R W Y G C M22206 3. If you have a heat pump system, use the CONVENTIONAL letter designations. If only one of the terminals, Rc or R, is to help you determine if you have a CONVENTIONAL or HEAT PUMP system. 15 69-1725-1 See table on the...
If you have a standard heating and/or cooling system, use the HEAT PUMP letter designations to wire the new thermostat. Step 7. WALLPLATE METAL JUMPER WIRE TERMINAL BLOCK SCREW TERMINALS LETTER DESIGNATIONS RC R W Y G C M22206 3. If you have a heat pump system, use the CONVENTIONAL letter designations. If only one of the terminals, Rc or R, is to help you determine if you have a CONVENTIONAL or HEAT PUMP system. 15 69-1725-1 See table on the...
Owner's Manual
Page 17
... letter designations designations on on page 20 if you are wiring a Heat Pump System. Use the information below if you are wiring a CONVENTIONAL System. These numbered notes appear on your old and new thermostats. Compare letter designations on the next page. 17 69-1725-1 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...
... letter designations designations on on page 20 if you are wiring a Heat Pump System. Use the information below if you are wiring a CONVENTIONAL System. These numbered notes appear on your old and new thermostats. Compare letter designations on the next page. 17 69-1725-1 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...
Owner's Manual
Page 18
... CONVENTIONAL HEATING AND COOLING SYSTEMS 1 If wires will be connected on the new thermostat, remove metal jumper wire between RC and R on the new thermostat. Wrap the bare end of the terminals, RC or R, will be connected to both R and RH terminals on the old thermostat, remove metal jumper wire between RC and R. Step 7. Leave metal jumper wire in place if only one C and/or C1 wire was connected to the old thermostat, the wire should be connected...
... CONVENTIONAL HEATING AND COOLING SYSTEMS 1 If wires will be connected on the new thermostat, remove metal jumper wire between RC and R on the new thermostat. Wrap the bare end of the terminals, RC or R, will be connected to both R and RH terminals on the old thermostat, remove metal jumper wire between RC and R. Step 7. Leave metal jumper wire in place if only one C and/or C1 wire was connected to the old thermostat, the wire should be connected...
Owner's Manual
Page 20
... matched to the C letter designation on the new thermostat. Call your local heating and cooling contractor for assistance. Connect Wires to New Wallplate (Cont) NOTES FOR HEAT PUMP SYSTEMS 1 Leave metal jumper wire between RC and R in place. 2 If the old thermostat had wires on both O and B, be sure to attach the B wire to the C, contact Honeywell. 4 If the old thermostat had wires on both the V and VR, some...
... matched to the C letter designation on the new thermostat. Call your local heating and cooling contractor for assistance. Connect Wires to New Wallplate (Cont) NOTES FOR HEAT PUMP SYSTEMS 1 Leave metal jumper wire between RC and R in place. 2 If the old thermostat had wires on both O and B, be sure to attach the B wire to the C, contact Honeywell. 4 If the old thermostat had wires on both the V and VR, some...
Owner's Manual
Page 28
Configure Installer Setup (Cont) 5. Follow steps 5 and 6 to set Installer Setup Numbers 0130, 0140 and 0150 to the next Installer Setup Number. 7. Date Select number that represents current calendar date. 11. After you select your setting for Installer Setup Number 0120 below. 6. Date (Year Select last two digits of current Lower) calendar year (05 for year 2005, etc). ADVANCE TO NEXT INSTALLER SETUP INSTALLER SETUP NUMBER DONE PRESS TO EXIT INSTALLER SETUP FACTORY SETTING CHANGE THE FACTORY SETTING Installer Setup Number 0120 0130 0140 0150 Installer Setup Name...
Configure Installer Setup (Cont) 5. Follow steps 5 and 6 to set Installer Setup Numbers 0130, 0140 and 0150 to the next Installer Setup Number. 7. Date Select number that represents current calendar date. 11. After you select your setting for Installer Setup Number 0120 below. 6. Date (Year Select last two digits of current Lower) calendar year (05 for year 2005, etc). ADVANCE TO NEXT INSTALLER SETUP INSTALLER SETUP NUMBER DONE PRESS TO EXIT INSTALLER SETUP FACTORY SETTING CHANGE THE FACTORY SETTING Installer Setup Number 0120 0130 0140 0150 Installer Setup Name...
Owner's Manual
Page 29
... heat with three wires connected to R and Y on new thermostat. 4 - Multistage Conventional Heating and Cooling -2 stages of Heat (wires on W and W2) and 2 stages of Cool (wires on new thermostat. 5 - Gas, oil or electric heating without central air conditioning. M22216 29 69-1725-1 Cool Only (Conventional) -- No wire on the G terminal on new thermostat. 6 - Central air conditioning only. 7 - heat pump with wires connected to new thermostat or for Installer Setup Number 0170. 9. Multistage Heat Pumps -- the compressor runs in both heating and cooling. 3 - Gas...
... heat with three wires connected to R and Y on new thermostat. 4 - Multistage Conventional Heating and Cooling -2 stages of Heat (wires on W and W2) and 2 stages of Cool (wires on new thermostat. 5 - Gas, oil or electric heating without central air conditioning. M22216 29 69-1725-1 Cool Only (Conventional) -- No wire on the G terminal on new thermostat. 6 - Central air conditioning only. 7 - heat pump with wires connected to new thermostat or for Installer Setup Number 0170. 9. Multistage Heat Pumps -- the compressor runs in both heating and cooling. 3 - Gas...
Owner's Manual
Page 30
... of your display, press the Up or Down arrow to select your setting, press the Up arrow key to go to the next Installer Setup Number. Electric Heat -- M22217 69-1725-1 30 Heating system controls fan in Heating 0 - Configure Installer Setup (Cont) 10. Gas or Oil Heat -- UP ARROW SETTING INSTALLER SETUP NUMBER DONE PRESS TO EXIT INSTALLER SETUP UP ARROW DOWN ARROW Installer Setup Number 0180 Installer Setup Name (Select Your Setting) Settings Fan Control in a call for Installer Setup Number 0180. 12...
... of your display, press the Up or Down arrow to select your setting, press the Up arrow key to go to the next Installer Setup Number. Electric Heat -- M22217 69-1725-1 30 Heating system controls fan in Heating 0 - Configure Installer Setup (Cont) 10. Gas or Oil Heat -- UP ARROW SETTING INSTALLER SETUP NUMBER DONE PRESS TO EXIT INSTALLER SETUP UP ARROW DOWN ARROW Installer Setup Number 0180 Installer Setup Name (Select Your Setting) Settings Fan Control in a call for Installer Setup Number 0180. 12...
Owner's Manual
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... EXIT INSTALLER SETUP UP ARROW DOWN ARROW Installer Setup Number 0190 Installer Setup Name (Select Your Setting) Settings Heat Pump 0 - Changeover Valve in Cooling -- Configure Installer Setup (Cont) 13. After you have a number 0190 on the left side of your display, press the Up or Down arrow to the O/B terminal. 1 - Use this setting if you connected a wire labeled B to the next Installer Setup Number. Changeover Use this setting if you connected a Valve wire labeled O to select your setting for Installer Setup Number 0190...
... EXIT INSTALLER SETUP UP ARROW DOWN ARROW Installer Setup Number 0190 Installer Setup Name (Select Your Setting) Settings Heat Pump 0 - Changeover Valve in Cooling -- Configure Installer Setup (Cont) 13. After you have a number 0190 on the left side of your display, press the Up or Down arrow to the O/B terminal. 1 - Use this setting if you connected a wire labeled B to the next Installer Setup Number. Changeover Use this setting if you connected a Valve wire labeled O to select your setting for Installer Setup Number 0190...
Owner's Manual
Page 41
On-The fan runs continuously. FAN AUTO Inside SYSTEM HEAT THU Set To Following Schedule AM SCHED HOLD CLOCK SCREEN M22262 41 69-1725-1 Use this setting for improved air circulation or for most homes. Set System Setting (Cont) Set Fan Setting Press the Fan button to select Auto or On: Auto-Normal setting for more efficient air cleaning. The fan runs only when the heating or cooling system is on.
On-The fan runs continuously. FAN AUTO Inside SYSTEM HEAT THU Set To Following Schedule AM SCHED HOLD CLOCK SCREEN M22262 41 69-1725-1 Use this setting for improved air circulation or for most homes. Set System Setting (Cont) Set Fan Setting Press the Fan button to select Auto or On: Auto-Normal setting for more efficient air cleaning. The fan runs only when the heating or cooling system is on.
Owner's Manual
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... want an energy-saving temperature. Edit Schedule 1. Press Sched key. FAN AUTO Inside SYSTEM HEAT FRI Set To Following Schedule AM PM SCHED HOLD CLOCK SCREEN M22445 69-1725-1 42 Return-Period when you return home and want your home back to four different schedule periods per day: Wake-Period when you are away from home and want your home at a comfortable temperature. Program Your Heating and Cooling Schedule Your thermostat can control up to a comfortable temperature. Sleep-Period...
... want an energy-saving temperature. Edit Schedule 1. Press Sched key. FAN AUTO Inside SYSTEM HEAT FRI Set To Following Schedule AM PM SCHED HOLD CLOCK SCREEN M22445 69-1725-1 42 Return-Period when you return home and want your home back to four different schedule periods per day: Wake-Period when you are away from home and want your home at a comfortable temperature. Program Your Heating and Cooling Schedule Your thermostat can control up to a comfortable temperature. Sleep-Period...
Owner's Manual
Page 46
... thermostat would then control to cancel (Wake, Leave, Return or Sleep). The time, temperature(s) and fan set desired time and temperatures. 69-1725-1 46 ting disappear. Press Done key. MON TUE WED THU FRI OK TO PICK MULTIPLE DAYS FAN SAT SUN HEAT COOL DONE 6. WAKE LEAVE RETURN SLEEP CANCEL M19957 To reinstate a schedule period, press arrow keys to match your lifestyle; for example, if someone is removed, indicating the scheduled period...
... thermostat would then control to cancel (Wake, Leave, Return or Sleep). The time, temperature(s) and fan set desired time and temperatures. 69-1725-1 46 ting disappear. Press Done key. MON TUE WED THU FRI OK TO PICK MULTIPLE DAYS FAN SAT SUN HEAT COOL DONE 6. WAKE LEAVE RETURN SLEEP CANCEL M19957 To reinstate a schedule period, press arrow keys to match your lifestyle; for example, if someone is removed, indicating the scheduled period...
Owner's Manual
Page 50
... Down arrow keys to indicate that "Hold Temperature Until" time is the time the Vacation Hold override expires after the number of Vacation Hold expires, the screen shows "Following Schedule" to change the number of days. 1. Press the Hold key twice. FAN Inside AUTO THU Set To SYSTEM HEAT Hold Temperature Until DAYS SCHED CLOCK SCREEN CANCEL M19961 4. To cancel Vacation Hold override early, press the Cancel key. When the number of days of days you desire the thermostat to override the schedule. Press the Up...
... Down arrow keys to indicate that "Hold Temperature Until" time is the time the Vacation Hold override expires after the number of Vacation Hold expires, the screen shows "Following Schedule" to change the number of days. 1. Press the Hold key twice. FAN Inside AUTO THU Set To SYSTEM HEAT Hold Temperature Until DAYS SCHED CLOCK SCREEN CANCEL M19961 4. To cancel Vacation Hold override early, press the Cancel key. When the number of days of days you desire the thermostat to override the schedule. Press the Up...
Owner's Manual
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... TUE WED THU FRI SAT SUN FAN AUTO OK TO PICK MULTIPLE DAYS SCREEN LOCKED CHANGE FILTER UV LAMP HUMIDIFIER PAD Inside Set To SYSTEM RESET HEAT PM Following Schedule SCHED HOLD CLOCK SCREEN MORE M19975 View or Reset Timer Settings Before They Expire 1. 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 when to change the number of run Time Days.
... TUE WED THU FRI SAT SUN FAN AUTO OK TO PICK MULTIPLE DAYS SCREEN LOCKED CHANGE FILTER UV LAMP HUMIDIFIER PAD Inside Set To SYSTEM RESET HEAT PM Following Schedule SCHED HOLD CLOCK SCREEN MORE M19975 View or Reset Timer Settings Before They Expire 1. 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 when to change the number of run Time Days.
Owner's Manual
Page 53
... the air conditioner to local weather, your schedule, the construction of bed or how long does it adjusts the next day's recovery start time accordingly. 53 69-1725-1 The thermostat determines that the heating or cooling system is coming on before a scheduled time when "Recovery" shows on the heat before 6:00 AM to raise the temperature to be 70°F. TUE FAN AUTO Inside Set To SYSTEM HEAT Following Schedule Recovery PM SCHED HOLD CLOCK SCREEN...
... the air conditioner to local weather, your schedule, the construction of bed or how long does it adjusts the next day's recovery start time accordingly. 53 69-1725-1 The thermostat determines that the heating or cooling system is coming on before a scheduled time when "Recovery" shows on the heat before 6:00 AM to raise the temperature to be 70°F. TUE FAN AUTO Inside Set To SYSTEM HEAT Following Schedule Recovery PM SCHED HOLD CLOCK SCREEN...
Owner's Manual
Page 59
...; Wait five minutes for the heating system to 37°C). Troubleshooting Tips If . . . See Installer Setup Number 0500 in the display. • Check the circuit breaker to be sure it is not tripped. • Check the power switch at heating and/or cooling system to be sure it is set below the room temperature and "Cool On" shows solidly in Step 11. Display is blank. set the Furnace Filter Change...
...; Wait five minutes for the heating system to 37°C). Troubleshooting Tips If . . . See Installer Setup Number 0500 in the display. • Check the circuit breaker to be sure it is not tripped. • Check the power switch at heating and/or cooling system to be sure it is set below the room temperature and "Cool On" shows solidly in Step 11. Display is blank. set the Furnace Filter Change...
Owner's Manual
Page 60
... not turn on Check Installer Setup Number 0180, Fan in a call for heat Control in setting matches the changeover required by the cool mode (heat the installed heat pump. pumps only). Troubleshooting Tips (Continued) If . . . make sure the bare portions of the wires are and/or Cooling System Type, and make sure the mode and warm air in Heating, and make sure it is active. "Cool On" is not shown in the display. "Wait...
... not turn on Check Installer Setup Number 0180, Fan in a call for heat Control in setting matches the changeover required by the cool mode (heat the installed heat pump. pumps only). Troubleshooting Tips (Continued) If . . . make sure the bare portions of the wires are and/or Cooling System Type, and make sure the mode and warm air in Heating, and make sure it is active. "Cool On" is not shown in the display. "Wait...
Owner's Manual
Page 61
... cool mode. the room temperature ("Heat On" is Check Installer Setup Number 0170, Heating running in display). Troubleshooting Tips (Continued) If . . . Heating system does Check Installer Setup Number 0170, Heating not turn on in the Troubleshooting Tips. and/or Cooling System Type, and make sure heat temperature the setting matches the installed heating and/ setting is wired to the thermostat L upper right corner and terminal. working. 61 69-1725-1 Red LED is on in the A system monitor is set below or cooling...
... cool mode. the room temperature ("Heat On" is Check Installer Setup Number 0170, Heating running in display). Troubleshooting Tips (Continued) If . . . Heating system does Check Installer Setup Number 0170, Heating not turn on in the Troubleshooting Tips. and/or Cooling System Type, and make sure heat temperature the setting matches the installed heating and/ setting is wired to the thermostat L upper right corner and terminal. working. 61 69-1725-1 Red LED is on in the A system monitor is set below or cooling...