Programmable Thermostat RTH221
Overview
Thermostat features ..............................2
Quick start .............................................3
Quick reference to controls ...................4
Quick reference to display.....................5
Programming & Operation
Setting the clock....................................6
System switch (Heat/Cool)....................7
Fan switch (Auto/On).............................8
Using the schedule...........................9-11
Temporary schedule override..............12
Permanent schedule override .............13
Compressor protection........................14
Appendices
Battery replacement ........................... 15
In case of difficulty .............................. 16
Customer assistance .......................... 17
One-year limited warranty .................. 18
Table of contents
Your new thermostat is pre-programmed
and ready to go!
See page 3 for quick start.
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