RTH8500
1
About your new thermostat
Thermostat features ..........................2
Programming at a glance..................3
Quick reference to controls ..............4
Quick reference to status display ....5
Programming & Operation
Clock setting ......................................6
Fan setting ........................................7
System setting....................................8
Using program schedules ................9
Program schedule overrides ..........12
Vacation hold ..................................14
Special features ..............................15
Screen cleaning ..............................16
Furnace filter reminder ....................17
Appendices
Battery replacement ........................18
In case of difficulty ..........................19
Limited warranty ..............................21
Table of contents
This thermostat is ready to go!
Your new thermostat is pre-
programmed and ready to go.
See page 3
to check settings.
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not operate
cooling system when outdoor
temperature is below 50°F (10°C).
