Honeywell RTH7400 Installation Manual page 24

Installation Guide
System setup
Daylight savings time on/off
Function
Press
0330
Options: 0
1
2
Furnace filter change reminder
Function
Press
0500
Options: 0
1
2
3
4
5
6
to select an option:
s/t
Off: No adjustment for daylight savings time.
On: Auto-change to daylight savings time (through 2006, and for areas that
do not use the new 2007 DST calendar).
On: Auto-change to daylight savings time (2007 and beyond, for areas that
use the new 2007 DST calendar).
to set the desired reminder interval:
s/t
Off (no reminder to change furnace filter)
Reminder after 10-day run time (about 1 month)
Reminder after 30-day run time (about 3 months)
Reminder after 60-day run time (about 6 months)
Reminder after 90-day run time (about 9 months)
Reminder after 120-day run time (about 1 year)
Reminder after 365-day run time (about 3 years)

Note: Press RESET
to cancel the alert.