Installation Instructions
Page 1
...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 that you are unsure which model is compatible with 2-wire cooling-only systems. ® U.S. No Yes Electric heat furnace with or without cooling: No No Yes Electric baseboard: Electric heating... system with more than one No stage, or an outdoor heating/cooling unit (compressor) with no auxiliary or backup heat. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J Heating only...
...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 that you are unsure which model is compatible with 2-wire cooling-only systems. ® U.S. No Yes Electric heat furnace with or without cooling: No No Yes Electric baseboard: Electric heating... system with more than one No stage, or an outdoor heating/cooling unit (compressor) with no auxiliary or backup heat. Installation Instructions Compatible with: Heating/Cooling system CT87A CT87B CT87J Heating only...
Installation Instructions
Page 2
... and lever on the wall; Mercury switch location. In the box below, record the number that the adjustment lever points to the heating/cooling system at the main fuse/circuit breaker panel. 2. Necessary if installing on an outlet box. sheet metal screws, two 1/2-in . CT87A,B,J ROUND® THERMOSTAT 2 Prepare for your heating system. Gather these tools: Required Tools...
... and lever on the wall; Mercury switch location. In the box below, record the number that the adjustment lever points to the heating/cooling system at the main fuse/circuit breaker panel. 2. Necessary if installing on an outlet box. sheet metal screws, two 1/2-in . CT87A,B,J ROUND® THERMOSTAT 2 Prepare for your heating system. Gather these tools: Required Tools...
Installation Instructions
Page 3
... control, or of an old control containing mercury in the trash. Fig. 2. Wrapping wires. Contact your old control in a sealed tube. 4 Install the cover ring and wallplate or subbase If installing on the wall (wallplate shown). Do not label the wires by color. 6. Fig. 4. CT87A,B,J ROUND® THERMOSTAT 5. Label the wires using the letter of...
... control, or of an old control containing mercury in the trash. Fig. 2. Wrapping wires. Contact your old control in a sealed tube. 4 Install the cover ring and wallplate or subbase If installing on the wall (wallplate shown). Do not label the wires by color. 6. Fig. 4. CT87A,B,J ROUND® THERMOSTAT 5. Label the wires using the letter of...
Installation Instructions
Page 4
... 1/16-in . Reposition the cover ring (if used) and wallplate/subbase over the cover ring. Installing wallplate/subbase on top. • If attaching subbase directly to Fig. 5 as you marked. 5. CT87A,B,J ROUND® THERMOSTAT 1. screws into the wall. • If attaching wallplate directly to mark the center of the screw...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 aligned and the two screw holes on the left and right sides of the cover ring is on an outlet box (...
... 1/16-in . Reposition the cover ring (if used) and wallplate/subbase over the cover ring. Installing wallplate/subbase on top. • If attaching subbase directly to Fig. 5 as you marked. 5. CT87A,B,J ROUND® THERMOSTAT 1. screws into the wall. • If attaching wallplate directly to mark the center of the screw...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 aligned and the two screw holes on the left and right sides of the cover ring is on an outlet box (...
Installation Instructions
Page 9
.... Place the thermostat over the wallplate or subbase so that holds the mercury switch in place during shipping. 2. Tighten the three captive mounting screws as shown in Fig. 15. Fig. 15. Tightening mounting screws. CT87A,B,J ROUND® THERMOSTAT 7 Mount the thermostat 1. HEAT ANTICIPATOR INDICATOR 1.2... scale as shown in Fig. 14. Adjusting heat anticipator indicator. NOTE: These screws complete the installation of the thermostat. CAPTIVE SCREWS (3) M20227 9 69-0274-6 Using a pencil point, slide the heat anticipator indicator to 1.2 on the wallplate/subbase....
.... Place the thermostat over the wallplate or subbase so that holds the mercury switch in place during shipping. 2. Tighten the three captive mounting screws as shown in Fig. 15. Fig. 15. Tightening mounting screws. CT87A,B,J ROUND® THERMOSTAT 7 Mount the thermostat 1. HEAT ANTICIPATOR INDICATOR 1.2... scale as shown in Fig. 14. Adjusting heat anticipator indicator. NOTE: These screws complete the installation of the thermostat. CAPTIVE SCREWS (3) M20227 9 69-0274-6 Using a pencil point, slide the heat anticipator indicator to 1.2 on the wallplate/subbase....