FocusPRO
Non-Programmable Digital Communicating Thermostat
To be used with up to 3 Heat 2 Cool conventional and heat pump systems with
W8835 Zone Panel or W8635 or THM5241 Equipment Interface Modules (EIM).
Use With
• W8835 Zone Panel—up to 3H/2C conventional or heat pump system
• W8635A EIM—up to 2H/2C conventional system
• W8635B EIM—up to 2H/1C heat pump system
• THM5421 EIM—up to 3H/2C conventional or heat pump
System Types
• Gas, oil, or electric heat with air
conditioning
• Warm air, hot water, high-
efficiency furnaces, heat pumps,
steam, gravity
Must be installed by a trained, experienced technician
Read these instructions carefully. Failure to follow these instructions
can damage the product or cause a hazardous condition.
For assistance with this product please visit
or call Honeywell Customer Care toll-free at
® U.S. Registered Trademark. Patents pending.
Copyright © 2008 Honeywell International Inc.
All rights reserved.
TH5320C
®
Need Help?
Installation
Guide
• Heat only — two-wire systems,
three-wire zone valves (Series
20), and normally open zone
valves
• Heat only with fan
• Cool only
http://yourhome.honeywell.com
1-800-468-1502
69-2019EFS-02