Installation Instructions
Page 1
... Honeywell Customer Care at 1-800-468-1502. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J Heating only: Gas or oil fueled warm air, steam, or hot Yes water heat Yes No Cooling only: Electric air conditioning Yes* Yes Yes Heating and cooling: Gas or oil fueled warm air, No steam, or hot water heat with electric air conditioning Yes No Single stage heat pump: Outdoor heating/cooling unit No (compressor) with 2-wire cooling-only systems. ® U.S. CT87A,B,J Round® Thermostat LOW VOLTAGE...
... Honeywell Customer Care at 1-800-468-1502. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J Heating only: Gas or oil fueled warm air, steam, or hot Yes water heat Yes No Cooling only: Electric air conditioning Yes* Yes Yes Heating and cooling: Gas or oil fueled warm air, No steam, or hot water heat with electric air conditioning Yes No Single stage heat pump: Outdoor heating/cooling unit No (compressor) with 2-wire cooling-only systems. ® U.S. CT87A,B,J Round® Thermostat LOW VOLTAGE...
Installation Instructions
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... anticipator setting on the old thermostat, you reach Step 8 of M20206 this installation. 4. Save your receipt and identify the following parts: • CT87 Thermostat • Screws: two 1-in . Remove the cover of your heating system. Mercury switch location. This is locked on the wall; Carefully unpack your new thermostat; Necessary if installing on the old thermostat (Fig. 1). drill bit • Wire cutter/stripper or sharp knife • Pencil 3 Remove the old thermostat 1. Locate the heat anticipator adjustment...
... anticipator setting on the old thermostat, you reach Step 8 of M20206 this installation. 4. Save your receipt and identify the following parts: • CT87 Thermostat • Screws: two 1-in . Remove the cover of your heating system. Mercury switch location. This is locked on the wall; Carefully unpack your new thermostat; Necessary if installing on the old thermostat (Fig. 1). drill bit • Wire cutter/stripper or sharp knife • Pencil 3 Remove the old thermostat 1. Locate the heat anticipator adjustment...
Installation Instructions
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CT87A,B,J ROUND® THERMOSTAT 5. Identify each wire using the wiring labels that contains 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. Do not label the wires by color. 6. Wrapping wires. Contact your old control in a sealed tube. 4 Install the cover ring and wallplate...
CT87A,B,J ROUND® THERMOSTAT 5. Identify each wire using the wiring labels that contains 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. Do not label the wires by color. 6. Wrapping wires. Contact your old control in a sealed tube. 4 Install the cover ring and wallplate...
Installation Instructions
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... Remove the wallplate/subbase and cover ring, and drill two 1/16-in . Installing wallplate/subbase on the top. 3. Position the wallplate or subbase. • If using the cover ring: Position the cover ring against the wall so that the fan and heating/cooling switches are...cover ring. CT87A,B,J ROUND® THERMOSTAT 1. You will be inserting screws through the wiring opening, and loosely insert the two 1-in . holes at the locations you work. 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...
... Remove the wallplate/subbase and cover ring, and drill two 1/16-in . Installing wallplate/subbase on the top. 3. Position the wallplate or subbase. • If using the cover ring: Position the cover ring against the wall so that the fan and heating/cooling switches are...cover ring. CT87A,B,J ROUND® THERMOSTAT 1. You will be inserting screws through the wiring opening, and loosely insert the two 1-in . holes at the locations you work. 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...
Installation Instructions
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... accu- To level the subbase, use the leveling posts directly below the Heat and Fan indicators. Leveling the wallplate. Place the cover ring against the outlet box so that the wallplate or subbase is pointing up , and pull the wires through. 5. screws, through the wiring hole on the left side of the cover ring. 3. rate thermostat temperature. 1. Rotate the wallplate/subbase...
... accu- To level the subbase, use the leveling posts directly below the Heat and Fan indicators. Leveling the wallplate. Place the cover ring against the outlet box so that the wallplate or subbase is pointing up , and pull the wires through. 5. screws, through the wiring hole on the left side of the cover ring. 3. rate thermostat temperature. 1. Rotate the wallplate/subbase...
Installation Instructions
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... 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 the terminal screws and slip each old thermostat wire with its matching terminal. 4. CT87A,B,J ROUND® THERMOSTAT 6 Wire the thermostat 1. Push any excess wire back into the wall. 69-0274-6 6 STRIP 5/16 in . [11 mm] BARRIER M1279 3. Use the wiring cross...
... 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 the terminal screws and slip each old thermostat wire with its matching terminal. 4. CT87A,B,J ROUND® THERMOSTAT 6 Wire the thermostat 1. Push any excess wire back into the wall. 69-0274-6 6 STRIP 5/16 in . [11 mm] BARRIER M1279 3. Use the wiring cross...
Installation Instructions
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CT87B for a 3-wire hot water heating only 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 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 WALLPLATE R Y W POWER HEAT TO SYSTEM M20183 Fig. 9. CT87A for a 2-wire heating only system.
CT87B for a 3-wire hot water heating only 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 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 WALLPLATE R Y W POWER HEAT TO SYSTEM M20183 Fig. 9. CT87A for a 2-wire heating only system.
Installation Instructions
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... Y P R B O JUMPER W TO Y AUTO • 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. CT87B for 4-wire single stage heat pump. CT87J SUBBASE HEAT FAN ON FAN COOL • OFF • AUTO • POWER WG 1Y P R B O HEAT REVERSING VALVE 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...
... Y P R B O JUMPER W TO Y AUTO • 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. CT87B for 4-wire single stage heat pump. CT87J SUBBASE HEAT FAN ON FAN COOL • OFF • AUTO • POWER WG 1Y P R B O HEAT REVERSING VALVE 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...
Installation Instructions
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Using a pencil point, slide the heat anticipator indicator to 1.2 on the wallplate/subbase. 4. HEAT ANTICIPATOR INDICATOR 1.2 .6 .5 .4 .3 .2 HOLE SUITABLE FOR PENCIL POINT TO MOVE INDICATOR .15 SCALE .12 .10 M20226 3. NOTE: These screws complete the installation of the thermostat. Adjusting heat anticipator indicator. Tighten the three captive mounting screws as shown in Fig. 14. Fig. 15. Pull off the thermostat cover and discard the red plastic insert that the...
Using a pencil point, slide the heat anticipator indicator to 1.2 on the wallplate/subbase. 4. HEAT ANTICIPATOR INDICATOR 1.2 .6 .5 .4 .3 .2 HOLE SUITABLE FOR PENCIL POINT TO MOVE INDICATOR .15 SCALE .12 .10 M20226 3. NOTE: These screws complete the installation of the thermostat. Adjusting heat anticipator indicator. Tighten the three captive mounting screws as shown in Fig. 14. Fig. 15. Pull off the thermostat cover and discard the red plastic insert that the...
Installation Instructions
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... the thermostat set temperature, move the anticipator pointer up by .1 ampere. The heating system should start. 4. Using a pencil point, move the heat anticipator pointer to maintain accurate temperature control. 1. Turn the transparent dial to Heat. 3. Turn the dial until the temperature on the setting scale (Fig. 16) exceeds the room temperature that is shown on the thermostat cover. Checking heating system. 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. If...
... the thermostat set temperature, move the anticipator pointer up by .1 ampere. The heating system should start. 4. Using a pencil point, move the heat anticipator pointer to maintain accurate temperature control. 1. Turn the transparent dial to Heat. 3. Turn the dial until the temperature on the setting scale (Fig. 16) exceeds the room temperature that is shown on the thermostat cover. Checking heating system. 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. If...
Installation Instructions
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... temperature. The cooling system should start. 3. Heat On Auto The thermostat controls your cooling system. The fan runs continuously. CT87A,B,J ROUND® THERMOSTAT Check cooling IMPORTANT: To avoid damaging the compressor in the air conditioner, do not operate the cooling system when the outdoor temperature is tested, wait five minutes before switching to Cool. CT87B, J switches Switch System Fan Setting Result Cool Off The thermostat controls your heating system. If your CT87 has a subbase, set the temperature, turn the dial until the pointer on the CT87J model...
... temperature. The cooling system should start. 3. Heat On Auto The thermostat controls your cooling system. The fan runs continuously. CT87A,B,J ROUND® THERMOSTAT Check cooling IMPORTANT: To avoid damaging the compressor in the air conditioner, do not operate the cooling system when the outdoor temperature is tested, wait five minutes before switching to Cool. CT87B, J switches Switch System Fan Setting Result Cool Off The thermostat controls your heating system. If your CT87 has a subbase, set the temperature, turn the dial until the pointer on the CT87J model...
Installation Instructions
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... INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. 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 time.
... INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. 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 time.
