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 Contents Prepare for Installation................................................................... 3 Follow Important 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 Battery Tips ....................................................................... 57 Built-in Compressor Protection ...................................................... 58 Troubleshooting Tips ..................................................................... 59 Customer Assistance..................................................................... 62 Limited One-Year Warranty ........................................................... 63 69-1725-1 2 Step 1. Prepare for Installation 1. Check that the following items are included: Insi de Set WALLPLATE THERMOSTAT MOUNTING SCREWS (2) AND WALL ANCHORS (2) OWNER'S GUIDE WIRE LABELS CAUTION CARD OWNER'S GUIDE CAUTION TURN OFF POWER to system at the 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. N Inside Set To de la letra correspondiente de B G R B G R Y2 H RC W X1 Y2 H RC W C L RH W1 C L RH W1 X2 E O T W2 Y E O T W2 F P U W3 F P U W3 Y1 V/VR V/VR Read and save these instructions X X 69-0823EFS 5-03 · yourhome M22200 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. 3 69-1725-1 Step 1. Prepare for Installation (Cont) 2. Check 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 69-1725-1 4 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 connected to your old thermostat. OLD THERMOSTAT YELLOW WHITE Y W RED ! DO NOT WIRE NEW THERMOSTAT BASED ON WIRE COLOR. G GREEN R RC ORANGE M22034 5 69-1725-1 Step 3. Remove Old Thermostat 1. 2. 3. Turn off power at the heating and/or cooling system or fuse/circuit breaker panel. Remove the cover from the old thermostat. Remove the old thermostat from the wall or wallplate. Do not remove the wires. OLD THERMOSTAT WALLPLATE Y W THERMOSTAT G R C .18 .2 .9 .7 .5 O .25 N GER .4 .3 COVER 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. MERCURY NOTICE L M22036 69-1725-1 6 Step 4. Follow Special Instructions 1. 2. 3. If you have two C and/or C1 wires connected to your old thermostat, do not connect them to your new thermostat. Disconnect the C and/or C1 wires. Make sure they do not touch each other or any other wires. Wrap the bare end of each C and/or C1 wire with electrical tape. OLD THERMOSTAT Y G C R C W LETTER DESIGNATION SCREW TERMINAL WIRE WIRE HOLE DO NOT CONNECT TO NEW THERMOSTAT M22201 7 69-1725-1 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. Visit www.honeywell.com/yourhome or call Honeywell Customer Care at 1-800-468-1502 before returning the thermostat to the store. OLD THERMOSTAT Y G W LETTER DESIGNATION SCREW TERMINAL WIRE R C WIRE HOLE CONNECT TO THE "C" ON THE NEW THERMOSTAT M22223 69-1725-1 8 Step 4. Follow Special Instructions (Cont) 5. 6. If you find any wires not connected to your old thermostat, do not connect them to your new thermostat. Wrap the end of the wires that are not connected with electrical tape. OLD THERMOSTAT Y W LETTER DESIGNATION SCREW TERMINAL G R RC WIRE WIRE HOLE WIRES NOT CONNECTED ­ DO NOT CONNECT TO NEW THERMOSTAT M22040 9 69-1725-1 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. Remove any remaining part of the old thermostat from the wall. 2. OLD THERMOSTAT WIRE LABEL LETTER DESIGNATION SCREW TERMINAL Y W Y G W G R R WIRE RC RC WIRE HOLE M22039 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. 69-1725-1 10 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 (Cont) 2. Pass the labeled wires through the wire hole on the wallplate. WALL OPENING WIRE HOLE WALLPLATE LABELED WIRES M22203 69-1725-1 12 Step 6. Mount New Wallplate 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. PLACE LEVEL ON SUPPORT TABS LEVEL MARK MOUNTING HOLES (2) WALLPLATE M22204 13 69-1725-1 Step 6. Mount New Wallplate to Wall (Cont) 4. 5. 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. Tap the wall anchors into the drilled holes until even with the wall surface. DRILLED HOLES (2) WALL ANCHORS (2) WALLPLATE M22205 MOUNTING SCREWS (2) 6. 7. Position the wallplate over the wall anchors. Insert the mounting screws into the wall anchors. Check leveling, if desired, and tighten the mounting screws. 69-1725-1 14 Step 7. Connect Wires to New Wallplate 1. 2. Match the labeled wires to the letter designations on the wallplate. 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 a heat pump system, use the HEAT PUMP letter designations to wire the new thermostat. METAL JUMPER WIRE TERMINAL BLOCK SCREW TERMINALS LETTER DESIGNATIONS WALLPLATE RC R W Y G C M22206 3. 4. If wires are to be connected to both Rc and R, loosen the Rc and R screw terminals and remove the metal jumper wire. 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. 15 69-1725-1 Step 7. Connect Wires to New Wallplate (Cont) 5. 6. Loosen the screw terminals. Insert the labeled wires into the holes on the side of the terminal block that match the letter designations. Tighten the screw terminals. If any of the labeled wires do not match the letter designations, see next page for wire connections. LABELED WIRES TERMINAL BLOCK SCREW TERMINALS LETTER DESIGNATIONS WALLPLATE RC RC R W R WIRE HOLE W Y Y G C (NOT USED) G INSERT WIRE IN HOLE M22207 69-1725-1 16 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. CONVENTIONAL letter designations on the new thermostat 1 Possible letter designations on the labeled wires 2 RC or R RC 1 2 R or RH, 4, V R W or W1, H W Y or Y1, M Y G or F G 3 C or C1, X, B 4 C Y2 W2 Y2 W2 M22208 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. 17 69-1725-1 Step 7. Connect Wires to New Wallplate (Cont) NOTES FOR CONVENTIONAL HEATING AND COOLING SYSTEMS 1 If wires will be connected to both RC and R on the new thermostat, remove metal jumper wire between RC and R. Leave metal jumper wire in place if only one of the terminals, RC or R, will be connected on the new thermostat. 2 If wires were connected to both R and RH terminals 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. 3 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. 4 If one C and/or C1 wire was connected to the old thermostat, the wire should be connected to the "C" letter designation on the new thermostat. M22246 69-1725-1 18 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. Possible letter designations on the labeled wires HEAT PUMP letter designations on the new thermostat 1 2 VR or V or R RC R 3 H or B, O O/B Y1 or M or Y Y G C L E AUX M22210 F or G 3 X or B, C F or L X2 or X, E 4 AUX, W1, W or W2 Be sure to read the note referenced in the numbered triangles above. These numbered notes appear on the next page. 19 69-1725-1 Step 7. 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 separate wires on both the V and VR, some system modification is required. Call your local heating and cooling contractor for assistance. 3 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. 4 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. M22245 69-1725-1 20 Step 7. Connect Wires to New Wallplate (Cont) 9. Push excess wire back into the wall opening. Keep wires in the shaded area. WIRE WALLPLATE WALL OPENING SHADED AREA M22211 21 69-1725-1 Step 8. Install Batteries 1. Install three fresh AAA alkaline batteries on the back of the thermostat as marked on the thermostat. BACK OF THERMOSTAT + + BATTERIES (3) + M22212 2. Remove the tab labeled "Remove during installation" in the lower right corner of the thermostat back. REMOVE DURING INSTALLATION REMOVE TAB REMOVE DURING INSTALLATION M19920 69-1725-1 22 Step 9. Attach New Thermostat to Wallplate 1. Align the screw blocks with the pins on the back of the thermostat. WALLPLATE PINS ON BACK OF THERMOSTAT TERMINAL SCREW BLOCK M22213 2. 3. Push the thermostat ...