Owner's Manual
Page 1
CT87A,B,J Round® Thermostat LOW VOLTAGE (15 TO 30 VAC), THERMOSTAT AND MOUNTING HARDWARE 1 Verify that you have the correct thermostat Using the compatibility chart below, verify...compressor) with no auxiliary or backup heat. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J Heating only: Gas or oil fueled warm air, steam, or hot Yes water heat...Registered Trademark Copyright © 2002 Honeywell All Rights Reserved 69-0274-6 No No * CT87A is right for your system, visit www.honeywell.com/ yourhome or call Honeywell Customer Care at 1-800-468-...
CT87A,B,J Round® Thermostat LOW VOLTAGE (15 TO 30 VAC), THERMOSTAT AND MOUNTING HARDWARE 1 Verify that you have the correct thermostat Using the compatibility chart below, verify...compressor) with no auxiliary or backup heat. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J Heating only: Gas or oil fueled warm air, steam, or hot Yes water heat...Registered Trademark Copyright © 2002 Honeywell All Rights Reserved 69-0274-6 No No * CT87A is right for your system, visit www.honeywell.com/ yourhome or call Honeywell Customer Care at 1-800-468-...
Owner's Manual
Page 2
...; Hand or power drill with 1/16-in . You may affect its accuracy. CT87A,B,J ROUND® THERMOSTAT 2 Prepare for your type of your new thermostat; binding head screws, and two 1/4-in . Carefully unpack your old thermostat. round head screws • Wallplate (CT87A) or subbase (CT87B, CT87J) • Cover ring (select models only). Optional if installing directly on...
...; Hand or power drill with 1/16-in . You may affect its accuracy. CT87A,B,J ROUND® THERMOSTAT 2 Prepare for your type of your new thermostat; binding head screws, and two 1/4-in . Carefully unpack your old thermostat. round head screws • Wallplate (CT87A) or subbase (CT87B, CT87J) • Cover ring (select models only). Optional if installing directly on...
Owner's Manual
Page 3
...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. Wrapping wires. Contact your old control in a sealed tube. 4 Install the...pencil to Fig. 4 as you work. Disconnect the wires from the old thermostat and wrap them from falling back into the wall (Fig. 3). Fig. 4. Fig. 2. M19086 MERCURY NOTICE Fig. 3. CT87A,B,J ROUND® THERMOSTAT 5. Label the wires using the letter of an old control containing mercury in...
...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. Wrapping wires. Contact your old control in a sealed tube. 4 Install the...pencil to Fig. 4 as you work. Disconnect the wires from the old thermostat and wrap them from falling back into the wall (Fig. 3). Fig. 4. Fig. 2. M19086 MERCURY NOTICE Fig. 3. CT87A,B,J ROUND® THERMOSTAT 5. Label the wires using the letter of an old control containing mercury in...
Owner's Manual
Page 4
...the cover ring (if used) and wallplate/subbase over the cover ring. Installing wallplate/subbase on the wallplate is pointing up. 2. 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 ... (2) OUTLET BOX 1 2 COVER RING SUBBASE 1/4 IN. Remove the wallplate/subbase and cover ring, and drill two 1/16-in . CT87A,B,J ROUND® THERMOSTAT 1. If using cover ring: Place the wallplate/subbase over the holes, pull the wires through these holes into the drilled holes. screws into the...
...the cover ring (if used) and wallplate/subbase over the cover ring. Installing wallplate/subbase on the wallplate is pointing up. 2. 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 ... (2) OUTLET BOX 1 2 COVER RING SUBBASE 1/4 IN. Remove the wallplate/subbase and cover ring, and drill two 1/16-in . CT87A,B,J ROUND® THERMOSTAT 1. If using cover ring: Place the wallplate/subbase over the holes, pull the wires through these holes into the drilled holes. screws into the...
Owner's Manual
Page 5
CT87A,B,J ROUND® THERMOSTAT 1. Fig. 6. Place the cover ring against the outlet box so that the arrow in the middle of the cover...IMPORTANT: The wallplate/subbase must be level to the cover ring with two 1/2-in Fig. 6. SPIRIT LEVEL LEVELING POSTS (2) OPENING FOR THERMOSTAT WIRING MOUNTING SLOTS M3319A 2. Tighten the mounting screws after making sure that the wiring holes line up . 2. Place the wallplate or ...-6 Rotate the wallplate/subbase until level as shown in . Loosely attach the wallplate/subbase to maintain accu- rate thermostat temperature. 1.
CT87A,B,J ROUND® THERMOSTAT 1. Fig. 6. Place the cover ring against the outlet box so that the arrow in the middle of the cover...IMPORTANT: The wallplate/subbase must be level to the cover ring with two 1/2-in Fig. 6. SPIRIT LEVEL LEVELING POSTS (2) OPENING FOR THERMOSTAT WIRING MOUNTING SLOTS M3319A 2. Tighten the mounting screws after making sure that the wiring holes line up . 2. Place the wallplate or ...-6 Rotate the wallplate/subbase until level as shown in . Loosely attach the wallplate/subbase to maintain accu- rate thermostat temperature. 1.
Owner's Manual
Page 6
CT87A,B,J ROUND® THERMOSTAT 6 Wire the thermostat 1. Loosen the terminal screws and slip each old thermostat wire with its matching terminal. 4. Push any excess wire back into the wall. 69-0274-6 6 Fig. 7. Securely tighten the terminal ...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 match each wire beneath its corresponding terminal on the CT87 wallplate or subbase. Strip the wire insulation as...
CT87A,B,J ROUND® THERMOSTAT 6 Wire the thermostat 1. Loosen the terminal screws and slip each old thermostat wire with its matching terminal. 4. Push any excess wire back into the wall. 69-0274-6 6 Fig. 7. Securely tighten the terminal ...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 match each wire beneath its corresponding terminal on the CT87 wallplate or subbase. Strip the wire insulation as...
Owner's Manual
Page 7
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 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 for a 2-wire heating only system. CT87A WALLPLATE R Y W POWER HEAT TO SYSTEM M20183 Fig. 9. CT87A for a 3-wire hot water heating only system. CT87B for a 4-wire heating/cooling system.
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 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 for a 2-wire heating only system. CT87A WALLPLATE R Y W POWER HEAT TO SYSTEM M20183 Fig. 9. CT87A for a 3-wire hot water heating only system. CT87B for a 4-wire heating/cooling system.
Owner's Manual
Page 8
...a 5-wire heating/cooling system. COOL • OFF • HEAT FAN ON RH G RC Y W AUTO • CT87B SUBBASE HEATING POWER FAN TO SYSTEM COOLING POWER TO SYSTEM COOL HEAT Fig. 12. CT87J SUBBASE HEAT FAN ON FAN COOL ... 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. CT87J for 4-wire single stage heat pump. M20225 COOL • OFF • HEAT FAN...DO NOT ATTACH WIRES TO BOTH B AND O M20186 Fig. 13. CT87A,B,J ROUND® THERMOSTAT Fig. 11.
...a 5-wire heating/cooling system. COOL • OFF • HEAT FAN ON RH G RC Y W AUTO • CT87B SUBBASE HEATING POWER FAN TO SYSTEM COOLING POWER TO SYSTEM COOL HEAT Fig. 12. CT87J SUBBASE HEAT FAN ON FAN COOL ... 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. CT87J for 4-wire single stage heat pump. M20225 COOL • OFF • HEAT FAN...DO NOT ATTACH WIRES TO BOTH B AND O M20186 Fig. 13. CT87A,B,J ROUND® THERMOSTAT Fig. 11.
Owner's Manual
Page 9
... shipping. 2. Tighten the three captive mounting screws as shown in Fig. 15. Tightening mounting screws. NOTE: These screws complete the installation of the thermostat. Fig. 15. HEAT ANTICIPATOR INDICATOR 1.2 .6 .5 .4 .3 .2 HOLE SUITABLE FOR PENCIL POINT TO MOVE INDICATOR .15 SCALE .12 .10 M20226... 3. Using a pencil point, slide the heat anticipator indicator to 1.2 on the wallplate/subbase. 4. 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 ...
... shipping. 2. Tighten the three captive mounting screws as shown in Fig. 15. Tightening mounting screws. NOTE: These screws complete the installation of the thermostat. Fig. 15. HEAT ANTICIPATOR INDICATOR 1.2 .6 .5 .4 .3 .2 HOLE SUITABLE FOR PENCIL POINT TO MOVE INDICATOR .15 SCALE .12 .10 M20226... 3. Using a pencil point, slide the heat anticipator indicator to 1.2 on the wallplate/subbase. 4. 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 ...
Owner's Manual
Page 10
... the temperature on the setting scale is below the room temperature that is shown on the thermometer. The heating system should stop. Fig. 16. CT87A,B,J ROUND® THERMOSTAT 8 Set the heat anticipator for your type of system shown in Step 3, sub-step 3. Snap on the old...
... the temperature on the setting scale is below the room temperature that is shown on the thermometer. The heating system should stop. Fig. 16. CT87A,B,J ROUND® THERMOSTAT 8 Set the heat anticipator for your type of system shown in Step 3, sub-step 3. Snap on the old...
Owner's Manual
Page 11
CT87A,B,J ROUND® THERMOSTAT Check cooling IMPORTANT: To avoid damaging the compressor in the air conditioner, do not operate the cooling system ...the System switch on the top 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 heating system. Both the heating and cooling systems are off. Raise the temperature setting above ..., turn the dial until the pointer on the left to Cool on the CT87J model. 2. Heat On Auto The thermostat controls your cooling system.
CT87A,B,J ROUND® THERMOSTAT Check cooling IMPORTANT: To avoid damaging the compressor in the air conditioner, do not operate the cooling system ...the System switch on the top 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 heating system. Both the heating and cooling systems are off. Raise the temperature setting above ..., turn the dial until the pointer on the left to Cool on the CT87J model. 2. Heat On Auto The thermostat controls your cooling system.
Owner's Manual
Page 12
... have other dated proof of purchase, to the retailer where you . on how long an implied warranty lasts, so the above . CT87A,B,J ROUND® THERMOSTAT Limited One-Year Warranty Honeywell warrants this product, excluding battery, to be to repair or replace the product within a reasonable period of the malfunction, and mail it, postage...
... have other dated proof of purchase, to the retailer where you . on how long an implied warranty lasts, so the above . CT87A,B,J ROUND® THERMOSTAT Limited One-Year Warranty Honeywell warrants this product, excluding battery, to be to repair or replace the product within a reasonable period of the malfunction, and mail it, postage...