Honeywell RTH8500 Owner's Manual

13
Arrow keys
Press to adjust
temperature or to make
selections from screen
menus.
Hold
Press to override
program schedule.
Sched
Press to set program schedule.
Current inside temperature.
Current day of week.
Current time.
Temperature setting.
Program schedule on
(does not display when off)
Smart Response
®
Technology in effect.
Press day(s) to set program schedule (see page 14).
More
Press for more options
(select models only).
Clock
Press to set clock.
Screen
Press to lock keypad
for 30 seconds to clean
screen.
Thermostat controls
Display screen
Press SYSTEM to select:
Heat: Heating system control.
Cool: Cooling system control.
Auto: Thermostat automatically selects
heating or cooling depending on the
indoor temperature.
Off: All systems off.
Em Heat: Emergency & Auxiliary Heat
control. Compressor is locked out.
(Select models only.)
Press DONE to exit and save settings.
Other display messages:
Cool On: Cooling system is on.
Heat On: Heating system is on.
Aux Heat On: Auxiliary heating system is activated (heat pump systems only)
Press FAN to select:
Auto: Fan runs only
when heating or cooling
system is on.
On: Fan runs
continuously.
Press DONE to exit
and save settings.
SCHED HOLD CLOCKSCREEN MORE
WED
AM
FAN
AUTO
SYSTEM
HEAT
Following
Schedule
Inside
Set To
Recovery
70
6:01
70
M28374
SCHED HOLD CLOCK SCREENMORE
MON TUE WED THU FRI SAT SUN
AM
FAN
AUTO
SYSTEM
HEAT
Following
Schedule
Inside
Set To
OK TO PICK MULTIPLE DAYS
70
6:01
70
M28373

Honeywell RTH8500 Specifications

General

Hold Feature	Yes
Compatibility	Works with most heating and cooling systems
Temperature Range	40°F to 90°F
Weight	250 g
Programmable	7-day programmable
Dimensions	4.5 x 3.5 x 0.9 inches (114 x 89 x 23 mm)