Honeywell RTH8500 Series - Auto Changeover; Setting Functions and Options

33-00133ES—01 20
Auto changeover
This feature is used in climates where both
air conditioning and heating are used on the
same day.
When the system is set to AUTO,
the thermostat automatically
selects heating or cooling
depending on the indoor temperature.
Heat and cool settings must be at least
3 degrees apart. The thermostat will
automatically adjust settings to maintain this
3-degree separation.
Note: System setting function 0300 controls
Auto changeover. See “Manual/Auto
Changeover” on page 22.
Setting functions and options
You can change options for a number of system functions. Available functions depend on
the type of system you have. The functions, designated with four-digit numbers, along with
available options are described on pages 21–23.
This thermostat is pre-set for a single-stage heating/cooling system.
Setting function 0170 for a heat pump will adjust the default settings.
DONE CANCEL
PM
6:30
SYSTEM
HEAT
MCR31562
DONE
0120
20
MCR31563
1 Press SYSTEM. You’ll see several blank buttons
on the bottom of the display.
2 Press and hold the center blank button until
the screen changes (approximately 5 seconds).
3 Cycle through the functions, press
st next to
the four digit number on the left.
4 As needed, change options for any function by
pressing st next to the number on the right.
5 When you have made all changes, press DONE
to save and exit.