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Prestige
®
THX9321/THX9421 Thermostat
1
69-2493EFS—01
Programming & Operation
Quick reference ..................................2
Date/time settings ..............................4
Fan settings ........................................5
System settings ..................................6
Energy Saver settings ........................7
Using program schedules ..................8
Schedule overrides .............................9
Menu options
System status ...................................11
Vacation/event scheduler .................12
Humidity controls .............................17
Ventilation controls ........................... 20
Preferences menu.............................21
Temporary schedule changes .......... 22
Screen cleaning ................................23
Security settings ............................... 24
Installer contact information ............25
Advanced features ...........................26
Appendices
Installer options ................................27
Battery replacement .........................28
Humidity display ...............................30
Optional accessories ........................31
In case of difficulty ...........................34
Limited warranty ............................... 35
Table of contents
CAUTION: EQUIPMENT DAMAGE HAZARD. To prevent possible compressor damage, do not
operate cooling system when outdoor temperature is below 50˚F (10˚C).
This thermostat contains a Lithium battery which may contain Perchlorate material.
Special handling may be required. See www.dtsc.ca.gov/hazardouswaste/perchlorate.