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11
RTH8500 Series
Fan operation settings
1 Press the Fan button to cycle to the
next available Fan mode.
2 Cycle through the modes until the
required Fan mode is displayed and
leave it to activate.
NOTE: Available Fan modes vary with
system settings.
Fan modes:
‒ Auto: Fan runs only when the
heating or cooling system is on.
‒ On: Fan is always on.
‒ Circ: Fan circulates randomly
about 33% of the time.
System operation settings
1 Press the Mode button to cycle to the
next available System mode.
2 Cycle through the modes until the
required System mode is displayed
and leave it to activate.
NOTE: Available System modes vary by
model and system settings.
System modes:
‒ Auto: Thermostat selects heating
or cooling as needed.
‒ Heat: Thermostat controls only the
heating system.
‒ Cool: Thermostat controls only the
cooling system.
‒ Em Heat (only for heat pumps
with auxiliary heat): Thermostat
controls Auxiliary Heat. Compressor
is not used.
‒ Off: Heating and cooling system is
off. Fan will still operate if fan is set
to On or Circulate.
AM
Fan
Mode
AwayHome
Following Schedule
AM
Fan
Mode
AwayHome
Following Schedule
AM
Fan
Mode
AwayHome
Following Schedule
Auto Chg. On
AM
Fan
Mode
AwayHome
Following Schedule
AM
Fan
Mode
AwayHome
Following Schedule
AM
Fan
Mode
AwayHome
Following Schedule
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