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The 1 /3 DIFFERENTIAL SWITCH is
located to the right of the display on the
base. The thermostat is preset at 1 F. At
this setting, the thermostat will maintain
the room temperature within 1 F of the
set temperature (this results in more
frequent system on/off cycles). If you
move the switch to the left, the thermo-
stat will maintain the room temperature
within 3 F of the set temperature (result-
ing in longer on/off cycles). Normally,
the 1 F setting is used.
The F /C SWITCH is located below the
display on the base. When you move the
switch up, the temperature will be
12
SETTING OPTION SWITCHES
displayed in degrees Fahrenheit. When
you move the switch down, the tempera-
ture will be displayed in degrees Celsius.
The GAS/ELECTRIC SWITCH is located
above the setback switch on the base.
When you move the switch right, the fan
will turn on immediately when the
furnace turns on (for electric heaters).
When you move the switch to the left,
the fan will come on after the furnace
warms up (for gas furnaces).
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