Honeywell RTH8500 - Manuel (Page 3)

1 69-2220EF—03
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
Screen cleaning ...............................................15
Furnace filter reminder ....................................16
Special features ...............................................17
Appendices
Battery replacement/
Customer assistance .......................................18
In case of difficulty ..........................................19
Limited warranty .............................................21
This thermostat is ready to go!
Your new thermostat is pre-
programmed and ready to go.
See page 3 to check settings.
Table of contents
CAUTION: EQUIPMENT DAMAGE
HAZARD. To prevent possible
compressor damage, do not oper-
ate cooling system when outdoor
temperature is below 50˚F (10˚C).
RTH8500