Honeywell CT87B - Manual
The installation manual for Honeywell’s CT87A, B, J Round thermostats covers essential setup procedures to ensure compatibility with heating/cooling systems. Key topics include verifying system suitability through a compatibility chart, preparing installation by identifying parts and tools, safely removing old units while recording heat anticipator settings, wiring configurations (including 2-, 3-, 4-, and 5-wire setups), mounting the wallplate or subbase with leveling adjustments, and adjusting the heat anticipator for optimal performance. Safety warnings and troubleshooting guidance for cooling operation are also addressed.
Table of Contents:
- Page 1 – System Compatibility Chart
- Page 2 – Preparation for Installation
- Page 3 – Wiring Preparation and Mounting Components
- Page 4 – Mounting Wallplate Installation
- Page 5 – Leveling and Alignment
- Page 6 – Wiring Procedures
- Page 7 – System Wiring Diagrams
- Page 8 – Advanced Wiring Configurations
- Page 9 – Final Mounting Procedures
- Page 10 – Anticipator Setting and Testing
- Page 11 – Cooling Functionality and Safety Checks
- Page 12 – Warranty Information
® 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
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About this manual
- Brand
- Honeywell
- Model
- CT87B
- Document type
- Manual
- Language(s)
- English
- Pages
- 12
- File size
- 299 KB
- Format
Summary
Compatibility guide detailing which thermostat models (CT87A, CT87B, CT87J) are suitable for various heating and cooling system types, including heating only, cooling only, and heat pumps.
Steps for preparing the installation by identifying parts, gathering tools, safely removing the old thermostat, and recording the current heat anticipator setting.
Instructions for labeling and disconnecting wires, mercury disposal warnings, installing the cover ring and wallplate or subbase, and required hardware.
