Honeywell CT87A,B,J Round® Thermostat Manual

Honeywell CT87A,B,J Round® Thermostat Installation Manual

Honeywell CT87A,B,J Round® Installation Instructions

Verify that you have the correct thermostat Using the compatibility chart below, verify that you purchased the correct CT87Thermostat for your heating/cooling system. If you are unsure which model is right for your system, visit www.honeywell.com/ yourhome or call Honeywell Customer Care at 1-800-468-1502.

 

HeatinglCooling system

Compatible with:

CT87A

CT87B

CT87J

Heating only: Gas or oil fueled warm air, steam, or hot water heat

Yes

Yes

No

Cooling only: Electric air conditioning

Yes*

Yes

Yes

Heating and cooling: Gas or oil fueled warm air, steam, or hot water heat with electric air conditioning

No

Yes

No

Single stage heat pump: Outdoor heating/cooling unit (compressor) with no auxiliary or backup heat.

No

No

Yes

Electric heat furnace with or without cooling:

No

No

Yes

Electric baseboard: Electric heating strips located just above the floor, usually 120-240 volts

No

No

No

Multistage: A conventional system with more than one stage, or an outdoor heating/cooling unit (compressor) with auxiliary or backup heat.

No

No

No

 * CT87A is compatible with 2-wire cooling-only systems.

Honeywell CT87A,B,J Round® Prepare for installation

1. Carefully unpack your new thermostat; rough handling may affect its accuracy. Save your receipt and identify the following parts:

  • CT87 Thermostat
  • Screws: two 1-in. sheet metal screws, two 1/2-in. binding head screws, and two 1/4-in. round head screws
  • Wallplate (CT87A) or subbase (CT87B, CT87J)
  • Cover ring (select models only). Necessary if installing on an outlet box. Optional if installing directly on the wall; can be used to hide wall marks.
  • These Installation Instructions and the Installation Quick Guide.
  • Wiring labels

2. Gather these tools:

Required Tools

Optional Tools

  • Flat blade Screwdriver
  • spirit level
  • Hand or power drill with 1/16-in. drillbit
  • Wire cutter/stripper or sharpknife
  • pencil

Remove the old thermostat

  1. Turn off power to the heating/cooling system at the main fuse/circuit breaker panel.
  2. Remove the cover of your old thermostat. You may need to unscrew the cover if it is locked on.
  3. Locate the heat anticipator adjustment scale and lever on the old thermostat (Fig. 1). In the box below, record the number that the adjustment lever points to. This is the current (amp) rating of your heating system. Current setting: If you cannot find the heat anticipator setting on the old thermostat, you can use a standard setting for your type of system when you reach Step 8 of this installation. 
  4. Unscrew and remove the old thermostat wallplate from the wall, but do not disconnect the wires.
  5. Label the wires using the wiring labels that came with the CT87. Identify each wire using the letter of the terminal on the old thermostat (Fig. 2). Do not label the wires by color.
  6. Disconnect the wires from the old thermostat and wrap them around a pencil to keep them from falling back into the wall (Fig. 3).

Readmore and Download Honeywell CT87A,B,J Round® Thermostat Manual PDF Below

Honeywell CT87A,B,J Round® Thermostat Manual