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Step 4: Customizing the Thermostat
♦ Settings
System
Cool: The thermostat controls the cooling.
Off: The heating and cooling systems are off.
Fan
Auto: Equipment controls the fan.
On: The fan operates continuously.
♦ Temperature Differential
The temperature differential is factory set at 1.0°F (.5°C). This means that
whenever the room temperature changes by one degree Fahrenheit
from the temperature setting, the system will turn on. If the system turns
on too often, increase the temperature differential.
♦ Changing Fahrenheit (°F) to Celsius (°C),
the Temperature Differential, and
the Filter Monitor
1. The thermostat is preset to display the
temperature in degrees Fahrenheit (US
models) or degrees Celsius (Canadian
models). The temperature display can be
changed. Press and hold both the
and buttons for three seconds. The display will flash either an F
or C. Release buttons. Press the or button to switch the display.
2. Wait five seconds or press and the display will switch to the
differential setting.
3. The display will read diFF. The tempera-
ture differential is factory set at 1.0°F
(0.5°C). Press the or button to adjust
the differential up or down.
4. Wait five seconds or press and the
display will switch to the
filter monitor setting.
5. CHECK FILTER and the length of hours for
the filter monitor will be displayed.
6. Use the or to adjust the filter timer
from 0 (OFF) to 9900 hours. NOTE: The
filter timer is based on equipment run
time. Select the length of time based on
the recommended service interval for
your filter.
7. Press the to return to normal operation.
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