Owner's Manual
Page 1
...the correct thermostat Using the compatibility chart below, verify that you are unsure which model is compatible with 2-wire cooling-only systems. ® U.S. If you purchased the correct CT87Thermostat for your heating/cooling system. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J ... No stage, or an outdoor heating/cooling unit (compressor) with no auxiliary or backup heat. No No * CT87A is right for your system, visit www.honeywell.com/ yourhome or call Honeywell Customer Care at 1-800-468-1502. Registered Trademark Copyright © 2002...
...the correct thermostat Using the compatibility chart below, verify that you are unsure which model is compatible with 2-wire cooling-only systems. ® U.S. If you purchased the correct CT87Thermostat for your heating/cooling system. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J ... No stage, or an outdoor heating/cooling unit (compressor) with no auxiliary or backup heat. No No * CT87A is right for your system, visit www.honeywell.com/ yourhome or call Honeywell Customer Care at 1-800-468-1502. Registered Trademark Copyright © 2002...
Owner's Manual
Page 2
... Step 8 of your receipt and identify the following parts: • CT87 Thermostat • Screws: two 1-in . Turn off power to . CT87A,B,J ROUND® THERMOSTAT 2 Prepare for your type of your new thermostat; sheet metal screws, two 1/2-in . Optional if installing directly on the old thermostat (Fig. 1). Carefully unpack your heating system. can use a TYPICAL LOCATION...
... Step 8 of your receipt and identify the following parts: • CT87 Thermostat • Screws: two 1-in . Turn off power to . CT87A,B,J ROUND® THERMOSTAT 2 Prepare for your type of your new thermostat; sheet metal screws, two 1/2-in . Optional if installing directly on the old thermostat (Fig. 1). Carefully unpack your heating system. can use a TYPICAL LOCATION...
Owner's Manual
Page 3
...of an old control containing mercury in the trash. stat (Fig. 2). M19086 MERCURY NOTICE Fig. 3. COVER RING WALLPLATE NO. 4 X 1 INCH SHEET METAL SCREWS (2) 3 THERMOSTAT WIRING OPENING M20188 69-0274-6 Fig. 2. WIRES THROUGH WALL OPENING If this control, or of the terminal on the wall (wallplate shown). Installing wallplate/subbase... mercury in a sealed tube, do not place your M20133 local waste management authority for instructions regarding recycling and the proper disposal of this thermostat is replacing a control that came with the CT87. CT87A,B,J ROUND®...
...of an old control containing mercury in the trash. stat (Fig. 2). M19086 MERCURY NOTICE Fig. 3. COVER RING WALLPLATE NO. 4 X 1 INCH SHEET METAL SCREWS (2) 3 THERMOSTAT WIRING OPENING M20188 69-0274-6 Fig. 2. WIRES THROUGH WALL OPENING If this control, or of the terminal on the wall (wallplate shown). Installing wallplate/subbase... mercury in a sealed tube, do not place your M20133 local waste management authority for instructions regarding recycling and the proper disposal of this thermostat is replacing a control that came with the CT87. CT87A,B,J ROUND®...
Owner's Manual
Page 4
...If attaching subbase directly to mark the center of the screw holes on the cover ring. holes at the locations you work. Fig. 5. CT87A,B,J ROUND® THERMOSTAT 1. M20187 69-0274-6 4 Use a pencil to the wall: Position so that the fan and heating/cooling switches are aligned and the .... screws into the wall. • If attaching wallplate directly to the wall: Position so that the arrow in . ROUND HEAD SCREW (2) A THERMOSTAT WIRING HOLE 1 THE TWO INNER HOLES ARE USED WITH WALLPLATE. 2 IF OUTLET BOX IS HORIZONTAL, MOUNT COVER RING IN POSITION SHOWN, BUT FASTEN ...
...If attaching subbase directly to mark the center of the screw holes on the cover ring. holes at the locations you work. Fig. 5. CT87A,B,J ROUND® THERMOSTAT 1. M20187 69-0274-6 4 Use a pencil to the wall: Position so that the fan and heating/cooling switches are aligned and the .... screws into the wall. • If attaching wallplate directly to the wall: Position so that the arrow in . ROUND HEAD SCREW (2) A THERMOSTAT WIRING HOLE 1 THE TWO INNER HOLES ARE USED WITH WALLPLATE. 2 IF OUTLET BOX IS HORIZONTAL, MOUNT COVER RING IN POSITION SHOWN, BUT FASTEN ...
Owner's Manual
Page 5
...on the bottom left and right sides of the cover ring is level. 5 69-0274-6 SPIRIT LEVEL LEVELING POSTS (2) OPENING FOR THERMOSTAT WIRING MOUNTING SLOTS M3319A 2. Tighten the mounting screws after making sure that the wallplate or subbase is pointing up , and pull the ...and attach the cover ring to the cover ring with two 1/2-in. rate thermostat temperature. 1. Leveling the wallplate. Loosely attach the wallplate/subbase to the outlet box with two 1/4in. CT87A,B,J ROUND® THERMOSTAT 1. Rotate the wallplate/subbase until level as shown in the middle of the...
...on the bottom left and right sides of the cover ring is level. 5 69-0274-6 SPIRIT LEVEL LEVELING POSTS (2) OPENING FOR THERMOSTAT WIRING MOUNTING SLOTS M3319A 2. Tighten the mounting screws after making sure that the wallplate or subbase is pointing up , and pull the ...and attach the cover ring to the cover ring with two 1/2-in. rate thermostat temperature. 1. Leveling the wallplate. Loosely attach the wallplate/subbase to the outlet box with two 1/4in. CT87A,B,J ROUND® THERMOSTAT 1. Rotate the wallplate/subbase until level as shown in the middle of the...
Owner's Manual
Page 6
... through 13 wiring diagrams. Wiring Cross-reference Wire Label R, RH, 4, V Rc, R W, W1, H Y, Y1, M G, F B O See Fig. 13 Connect to CT87A R W Y See Fig. 9 Connect to Connect to CT87B CT87J RH R Rc W W Y Y G G B* O* P *Never attach wires to fit the wires underneath...mm] FOR WRAPAROUND CONNECTION- STRIP 5/16 in . [11 mm] BARRIER M1279 3. Securely tighten the terminal screws. 5. CT87A,B,J ROUND® THERMOSTAT 6 Wire the thermostat 1. Use the wiring cross-reference table below to match each wire beneath its corresponding terminal on the CT87 wallplate or ...
... through 13 wiring diagrams. Wiring Cross-reference Wire Label R, RH, 4, V Rc, R W, W1, H Y, Y1, M G, F B O See Fig. 13 Connect to CT87A R W Y See Fig. 9 Connect to Connect to CT87B CT87J RH R Rc W W Y Y G G B* O* P *Never attach wires to fit the wires underneath...mm] FOR WRAPAROUND CONNECTION- STRIP 5/16 in . [11 mm] BARRIER M1279 3. Securely tighten the terminal screws. 5. CT87A,B,J ROUND® THERMOSTAT 6 Wire the thermostat 1. Use the wiring cross-reference table below to match each wire beneath its corresponding terminal on the CT87 wallplate or ...
Owner's Manual
Page 7
CT87A for a 4-wire heating/cooling system. CT87B for a 2-wire heating only system. CT87A for a 3-wire hot water heating only system. R Y W CT87A WALLPLATE WIRE LABELS (LETTERS ON ORIGINAL THERMOSTAT TERMINALS) R 3-WIRE W HOT WATER ZONE VALVE B M20184 Fig. 10. CT87A WALLPLATE R Y W POWER HEAT TO SYSTEM M20183 Fig. 9. CT87A,B,J ROUND® THERMOSTAT Fig. 8. COOL • OFF • HEAT FAN ON RH G RC Y W AUTO • CT87B SUBBASE POWER FAN COOL TO SYSTEM HEAT JUMPER RH TO RC M20185 7 69-0274-6
CT87A for a 4-wire heating/cooling system. CT87B for a 2-wire heating only system. CT87A for a 3-wire hot water heating only system. R Y W CT87A WALLPLATE WIRE LABELS (LETTERS ON ORIGINAL THERMOSTAT TERMINALS) R 3-WIRE W HOT WATER ZONE VALVE B M20184 Fig. 10. CT87A WALLPLATE R Y W POWER HEAT TO SYSTEM M20183 Fig. 9. CT87A,B,J ROUND® THERMOSTAT Fig. 8. COOL • OFF • HEAT FAN ON RH G RC Y W AUTO • CT87B SUBBASE POWER FAN COOL TO SYSTEM HEAT JUMPER RH TO RC M20185 7 69-0274-6
Owner's Manual
Page 8
CT87A,B,J ROUND® THERMOSTAT Fig. 11. COOL • OFF • HEAT FAN ON RH G RC Y W AUTO • CT87B SUBBASE HEATING POWER FAN TO SYSTEM COOLING POWER TO SYSTEM COOL ... COOL REVERSING VALVE TO SYSTEM HEAT PUMP COMPRESSOR DO NOT ATTACH WIRES TO BOTH B AND O 1 IF WIRES ARE ATTACHED TO Y OR W, AND P ON YOUR OLD THERMOSTAT, CONTACT YOUR LOCAL CONTRACTOR FOR FURTHER ASSISTANCE.
CT87A,B,J ROUND® THERMOSTAT Fig. 11. COOL • OFF • HEAT FAN ON RH G RC Y W AUTO • CT87B SUBBASE HEATING POWER FAN TO SYSTEM COOLING POWER TO SYSTEM COOL ... COOL REVERSING VALVE TO SYSTEM HEAT PUMP COMPRESSOR DO NOT ATTACH WIRES TO BOTH B AND O 1 IF WIRES ARE ATTACHED TO Y OR W, AND P ON YOUR OLD THERMOSTAT, CONTACT YOUR LOCAL CONTRACTOR FOR FURTHER ASSISTANCE.
Owner's Manual
Page 9
... the wallplate or subbase so that holds the mercury switch in place during shipping. 2. Pull off the thermostat cover and discard the red plastic insert that the three captive mounting screws align with the three raised screw holes on the scale ...as shown in Fig. 14. Using a pencil point, slide the heat anticipator indicator to 1.2 on the wallplate/subbase. 4. IMPORTANT: This prevents the thermostat from being damaged. HEAT ANTICIPATOR INDICATOR 1.2 .6 .5 .4 .3 .2 HOLE SUITABLE FOR PENCIL POINT TO MOVE INDICATOR .15 SCALE .12 .10 M20226 3. Fig. 14. Tightening ...
... the wallplate or subbase so that holds the mercury switch in place during shipping. 2. Pull off the thermostat cover and discard the red plastic insert that the three captive mounting screws align with the three raised screw holes on the scale ...as shown in Fig. 14. Using a pencil point, slide the heat anticipator indicator to 1.2 on the wallplate/subbase. 4. IMPORTANT: This prevents the thermostat from being damaged. HEAT ANTICIPATOR INDICATOR 1.2 .6 .5 .4 .3 .2 HOLE SUITABLE FOR PENCIL POINT TO MOVE INDICATOR .15 SCALE .12 .10 M20226 3. Fig. 14. Tightening ...
Owner's Manual
Page 10
...move the heat anticipator pointer to the farthest point left. 2. If your system IMPORTANT: Setting the heat anticipator allows the thermostat to maintain accurate temperature control. 1. Fig. 16. Your heating system: Steam Hot water heat High-efficiency warm air Standard ...warm air Electric heat Heat anticipator setting: 1.2 0.8 0.8 0.4 0.3 2. Snap on the thermometer. Checking heating system. CT87A,B,J ROUND® THERMOSTAT 8 Set the heat anticipator for your type of system shown in Step 3, sub-step 3. Using a pencil point, move the anticipator pointer...
...move the heat anticipator pointer to the farthest point left. 2. If your system IMPORTANT: Setting the heat anticipator allows the thermostat to maintain accurate temperature control. 1. Fig. 16. Your heating system: Steam Hot water heat High-efficiency warm air Standard ...warm air Electric heat Heat anticipator setting: 1.2 0.8 0.8 0.4 0.3 2. Snap on the thermometer. Checking heating system. CT87A,B,J ROUND® THERMOSTAT 8 Set the heat anticipator for your type of system shown in Step 3, sub-step 3. Using a pencil point, move the anticipator pointer...
Owner's Manual
Page 11
... setting scale aligns with the heating or cooling system. 11 69-0274-6 CT87B, J switches Switch System Fan Setting Result Cool Off The thermostat controls your CT87 has a subbase, set the temperature, turn the dial until the pointer on the CT87J model. 2. If your cooling ...system. The fan runs continuously. Heat On Auto The thermostat controls your heating system. The cooling system should start. 3. CT87A,B,J ROUND® THERMOSTAT Check cooling IMPORTANT: To avoid damaging the compressor in the air conditioner, do not operate the cooling...
... setting scale aligns with the heating or cooling system. 11 69-0274-6 CT87B, J switches Switch System Fan Setting Result Cool Off The thermostat controls your CT87 has a subbase, set the temperature, turn the dial until the pointer on the CT87J model. 2. If your cooling ...system. The fan runs continuously. Heat On Auto The thermostat controls your heating system. The cooling system should start. 3. CT87A,B,J ROUND® THERMOSTAT Check cooling IMPORTANT: To avoid damaging the compressor in the air conditioner, do not operate the cooling...
Owner's Manual
Page 12
CT87A,B,J ROUND® THERMOSTAT Limited One-Year Warranty Honeywell warrants this product, excluding battery, to be to repair...at any questions concerning this limitation may have any time during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it is defective, (i) return it, with proof of purchase (including date of purchase) and ...product was caused by the consumer. on how long an implied warranty lasts, so the above . HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL ...
CT87A,B,J ROUND® THERMOSTAT Limited One-Year Warranty Honeywell warrants this product, excluding battery, to be to repair...at any questions concerning this limitation may have any time during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it is defective, (i) return it, with proof of purchase (including date of purchase) and ...product was caused by the consumer. on how long an implied warranty lasts, so the above . HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL ...