Owner's Manual
Page 1
...CT87Thermostat for your heating/cooling system. 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 1-800-468-1502. CT87A,B,J Round® Thermostat LOW... the compatibility chart below, verify that you are unsure which model is compatible with 2-wire cooling-only systems. ® U.S. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J Heating only: Gas or oil fueled warm air, steam, or hot Yes water...
...CT87Thermostat for your heating/cooling system. 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 1-800-468-1502. CT87A,B,J Round® Thermostat LOW... the compatibility chart below, verify that you are unsure which model is compatible with 2-wire cooling-only systems. ® U.S. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J Heating only: Gas or oil fueled warm air, steam, or hot Yes water...
Owner's Manual
Page 2
... marks. • These Installation Instructions and the Installation Quick Guide. • Wiring labels 2. round head screws • Wallplate (CT87A) or subbase (CT87B, CT87J) • Cover ring (select models only). drill bit • Wire cutter/stripper or sharp knife • Pencil 3 Remove the old thermostat 1. ...in . Remove the cover of your new thermostat; Unscrew and remove the old thermostat wallplate from the wall, but do not disconnect the wires. 69-0274-6 2 sheet metal screws, two 1/2-in . Locate the heat anticipator adjustment scale and lever on the wall; Save your...
... marks. • These Installation Instructions and the Installation Quick Guide. • Wiring labels 2. round head screws • Wallplate (CT87A) or subbase (CT87B, CT87J) • Cover ring (select models only). drill bit • Wire cutter/stripper or sharp knife • Pencil 3 Remove the old thermostat 1. ...in . Remove the cover of your new thermostat; Unscrew and remove the old thermostat wallplate from the wall, but do not disconnect the wires. 69-0274-6 2 sheet metal screws, two 1/2-in . Locate the heat anticipator adjustment scale and lever on the wall; Save your...
Owner's Manual
Page 3
...is replacing a control that came with the CT87. stat (Fig. 2). COVER RING WALLPLATE NO. 4 X 1 INCH SHEET METAL SCREWS (2) 3 THERMOSTAT WIRING OPENING M20188 69-0274-6 Contact your old control in a sealed tube. 4 Install the cover ring and wallplate or subbase If installing on the wall (... Installing wallplate/subbase on the wall Refer to keep them from falling back into the wall (Fig. 3). Fig. 2. Wrapping wires. Fig. 4. Labeling wires. Disconnect the wires from the old thermostat and wrap them around a pencil to Fig. 4 as you work. Do not label the...
...is replacing a control that came with the CT87. stat (Fig. 2). COVER RING WALLPLATE NO. 4 X 1 INCH SHEET METAL SCREWS (2) 3 THERMOSTAT WIRING OPENING M20188 69-0274-6 Contact your old control in a sealed tube. 4 Install the cover ring and wallplate or subbase If installing on the wall (... Installing wallplate/subbase on the wall Refer to keep them from falling back into the wall (Fig. 3). Fig. 2. Wrapping wires. Fig. 4. Labeling wires. Disconnect the wires from the old thermostat and wrap them around a pencil to Fig. 4 as you work. Do not label the...
Owner's Manual
Page 4
... to the wall: Position so that the UP indicator on the wallplate is pointing up. 2. Fig. 5. M20187 69-0274-6 4 Rotate the wallplate/subbase until the wiring openings are on the top. 3. Use a pencil to Fig. 5 as you marked. 5. holes at the locations you work. Reposition the cover ring (if used) and... and cover ring, and drill two 1/16-in the middle of the screw holes on the cover ring. You will be inserting screws through the wiring opening, and loosely insert the two 1-in. If using cover ring: Place the wallplate/subbase over the holes, pull the...
... to the wall: Position so that the UP indicator on the wallplate is pointing up. 2. Fig. 5. M20187 69-0274-6 4 Rotate the wallplate/subbase until the wiring openings are on the top. 3. Use a pencil to Fig. 5 as you marked. 5. holes at the locations you work. Reposition the cover ring (if used) and... and cover ring, and drill two 1/16-in the middle of the screw holes on the cover ring. You will be inserting screws through the wiring opening, and loosely insert the two 1-in. If using cover ring: Place the wallplate/subbase over the holes, pull the...
Owner's Manual
Page 5
... thermostat temperature. 1. Place the cover ring against the outlet box so that the arrow in Fig. 6. Tighten the mounting screws after making sure that the wiring holes line up . 2. Place the wallplate or subbase over the cover ring so that the wallplate or subbase is pointing up , and pull the... wires through the screw holes on the cover ring with the outlet box screw holes, and attach the cover ring to the outlet box with two 1/...
... thermostat temperature. 1. Place the cover ring against the outlet box so that the arrow in Fig. 6. Tighten the mounting screws after making sure that the wiring holes line up . 2. Place the wallplate or subbase over the cover ring so that the wallplate or subbase is pointing up , and pull the... wires through the screw holes on the cover ring with the outlet box screw holes, and attach the cover ring to the outlet box with two 1/...
Owner's Manual
Page 6
... STRAIGHT CONNECTION- Securely tighten the terminal screws. 5. See Fig. 8 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 match each wire beneath its corresponding terminal on the CT87 wallplate or subbase. Loosen...
... STRAIGHT CONNECTION- Securely tighten the terminal screws. 5. See Fig. 8 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 match each wire beneath its corresponding terminal on the CT87 wallplate or subbase. Loosen...
Owner's Manual
Page 7
CT87A for a 4-wire heating/cooling 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,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 WALLPLATE R Y W POWER HEAT TO SYSTEM M20183 Fig. 9. CT87B for a 3-wire hot water heating only system. CT87A for a 2-wire heating only system.
CT87A for a 4-wire heating/cooling 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,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 WALLPLATE R Y W POWER HEAT TO SYSTEM M20183 Fig. 9. CT87B for a 3-wire hot water heating only system. CT87A for a 2-wire heating only system.
Owner's Manual
Page 8
... • CT87J SUBBASE HEAT FAN TO SYSTEM POWER COOL REVERSING VALVE HEAT REVERSING VALVE DO NOT ATTACH WIRES TO BOTH B AND O M20186 Fig. 13. M20228 69-0274-6 8 CT87B for 4-wire single stage heat pump. CT87J for a 5-wire heating/cooling system. CT87J SUBBASE HEAT FAN ON FAN COOL • OFF • AUTO • POWER WG...
... • CT87J SUBBASE HEAT FAN TO SYSTEM POWER COOL REVERSING VALVE HEAT REVERSING VALVE DO NOT ATTACH WIRES TO BOTH B AND O M20186 Fig. 13. M20228 69-0274-6 8 CT87B for 4-wire single stage heat pump. CT87J for a 5-wire heating/cooling system. CT87J SUBBASE HEAT FAN ON FAN COOL • OFF • AUTO • POWER WG...