Honeywell Round CT87A User Manual

® U.S. Registered Trademark
Copyright © 2002 Honeywell
All Rights Reserved
69-0274-6
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.
* CT87A is compatible with 2-wire cooling-only systems.
Heating/Cooling 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
1
CT87A,B,J Round
®
Thermostat
LOW VOLTAGE (15 TO 30 VAC),
THERMOSTAT AND MOUNTING HARDWARE
Installation Instructions

Honeywell Round CT87A Specifications

General

Brand	Honeywell
Model	Round CT87A
Category	Thermostat
Language	English

Summary

Verify Correct Thermostat

Prepare for Installation

Remove Old Thermostat

Install Wallplate or Subbase

Level Wallplate or Subbase

Wire the Thermostat

Mount the Thermostat

Set Heat Anticipator

Check Heating and Cooling Operation

Thermostat Operation Modes

CT87B, J Switches Explained

Explains system and fan switch settings and their results for CT87B/J models.

Limited One-Year Warranty