Honeywell RTH8500 - Installing your thermostat

10
Advanced Installation
Enter System Setup
1. Press SYSTEM.
2. Press and hold blank center key until the screen changes (approximately
5 seconds).
Changing Settings
1. Press the s or t button to select
function.
2. Press the s or t button to change
setting.
3. Press DONE to save & exit.
NOTE: Some functions in the following
pages may not appear due to previous
selections made.
DONE
TUE
Inside
Set To
70
0120
70
20
FAN
AUTO
M28341
Function Setting
Function Description Setting
Press the s or t button to change the setting.
0120 Year Setting
(first two digits)
20 = Year 20xx
21 = Year 21xx
0130 Year Setting
(second two digits)
01 - 99 (i.e., 2001 - 2099
0140 Month Setting 01 - 12 (i.e., January - December)
0150 Date Setting 01 - 31
SCHED HOLD
SCREEN MORE
TUE
AM
Following
Schedule
Inside
Outside
Set To
70
6:01
70
43
FAN
AUTO
SYSTEM
HEAT
M28340
DONE CANCEL
TUE
AM
Inside
Set To
70
6:01
70
FAN
AUTO
SYSTEM
HEAT
M28341