Contents
Main
Verify that you have the correct thermostat
CT87A,B,J Round Thermostat
LOW VOLTAGE (15 TO 30 VAC), THERMOSTAT AND MOUNTING HARDWARE Installation Instructions
Prepare for installation
Remove the old thermostat
Install the cover ring and wallplate or subbase
If installing on the wall
MERCURY NOTICE
If installing on an outlet box
Level the wallplate or subbase
Wire the thermostat
Wiring Cross-reference
CT87A,B,J ROUND THERMOSTAT
7 69-0274-6
Fig. 8. CT87A for a 2-wire heating only system.
Fig. 10. CT87B for a 4-wire heating/cooling system.
Fig. 9. CT87A for a 3-wire hot water heating only system.
CT87A,B,J ROUND THERMOSTAT
69-0274-6 8
Fig. 11. CT87B for a 5-wire heating/cooling system.
Fig. 13. CT87J for 4-wire single stage heat pump.
Fig. 12. CT87J for a 4-wire single stage heat pump.
Page
Set the heat anticipator for your system
Check heating/cooling operation
Check heating
Check cooling
Operation
CT87B, J switches
CT87A,B,J ROUND THERMOSTAT
Limited One-Year Warranty