VisionPRO
Touch-screen Programmable Thermostat
This manual covers the following models
• TH8110U: For 1 Heat/1 Cool systems
• TH8320U: For up to 3 Heat/2 Cool systems
• TH8321U: For up to 3 Heat/2 Cool systems with dehumidification
(Pull thermostat from wallplate and turn over to find model number)
System Types
• Gas, oil, or electric heat with air
conditioning
• Warm air, hot water,
highefficiency furnaces, heat
pumps, steam, gravity
This thermostat contains a Lithium battery which may contain Perchlorate material.
Perchlorate Material—special handling may apply,
See www.dtsc.ca.gov/hazardouswaste/perchlorate
For assistance with this product please visit
or call Honeywell Customer Care toll-free at
® U.S. Registered Trademark.
US Patent No. 6595430, D509151 and other patents pending.
Copyright © 2007 Honeywell International Inc.
All rights reserved.
TH8000 Series
®
Need Help?
Installation
Guide
• Heat only — two-wire systems,
power to open and close
zone valves (Series 20), and
normallyopen zone valves
• Heat only with fan
• Cool only
• 750 mV heating systems
http://yourhome.honeywell.com
1-800-468-1502
69-1896ES-1